[Federal Register: September 28, 2010 (Volume 75, Number 187)]
[Rules and Regulations]
[Page 59645-59656]
From the Federal Register Online via GPO Access [wais.access.gpo.gov]
[DOCID:fr28se10-14]
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DEPARTMENT OF THE INTERIOR
Fish and Wildlife Service
50 CFR Part 17
[Docket No. FWS-R9-IA-2008-0068; 92210-0-0010-B6]
RIN 1018-AV60
Endangered and Threatened Wildlife and Plants; Determination of
Endangered Status for the African Penguin
AGENCY: Fish and Wildlife Service, Interior.
ACTION: Final rule.
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SUMMARY: We, the U.S. Fish and Wildlife Service, determine endangered
status for the African penguin (Spheniscus demersus) under the
Endangered Species Act of 1973, as amended. This final rule implements
the Federal protections provided by the Act for this species.
DATES: This rule becomes effective October 29, 2010.
ADDRESSES: This final rule is available on the Internet at http://
www.regulations.gov and comments and materials received, as well as
supporting documentation used in the preparation of this rule, will be
available for public inspection, by appointment, during normal business
hours at: U.S. Fish and Wildlife Service, 4401 N. Fairfax Drive, Suite
400, Arlington, VA 22203.
FOR FURTHER INFORMATION CONTACT: Janine Van Norman, Chief, Branch of
[[Page 59646]]
Foreign Species, Endangered Species Program, U.S. Fish and Wildlife
Service, 4401 North Fairfax Drive, Room 420, Arlington, VA 22203;
telephone 703-358-2171; facsimile 703-358-1735. If you use a
telecommunications device for the deaf (TDD), call the Federal
Information Relay Service (FIRS) at 800-877-8339.
SUPPLEMENTARY INFORMATION:
Background
The Endangered Species Act of 1973, as amended (Act) (16 U.S.C.
1531 et seq.) is a law that was passed to prevent extinction of species
by providing measures to help alleviate the loss of species and their
habitats. Before a plant or animal species can receive the protection
provided by the Act, it must first be added to the Federal Lists of
Threatened and Endangered Wildlife and Plants; section 4 of the Act and
its implementing regulations at 50 CFR part 424 set forth the
procedures for adding species to these lists.
Previous Federal Action
On November 29, 2006, the U.S. Fish and Wildlife Service (Service)
received a petition from the Center for Biological Diversity (CBD) to
list 12 penguin species under the Act: Emperor penguin (Aptenodytes
forsteri), southern rockhopper penguin (Eudyptes chrysocome), northern
rockhopper penguin (Eudyptes moseleyi), Fiordland crested penguin
(Eudyptes pachyrhynchus), snares crested penguin (Eudyptes robustus),
erect-crested penguin (Eudyptes sclateri), macaroni penguin (Eudyptes
chrysolophus), royal penguin (Eudyptes schlegeli), white-flippered
penguin (Eudyptula minor albosignata), yellow-eyed penguin (Megadyptes
antipodes), African penguin (Spheniscus demersus), and Humboldt penguin
(Spheniscus humboldti). On July 11, 2007, we published in the Federal
Register a 90-day finding (72 FR 37695) in which we determined that the
petition presented substantial scientific or commercial information
indicating that listing 10 of the penguin species as endangered or
threatened may be warranted, but determined that the petition did not
provide substantial scientific or commercial information indicating
that listing the snares crested penguin and the royal penguin as
threatened or endangered species may be warranted.
Following the publication of our 90-day finding on this petition,
we initiated a status review to determine if listing each of the 10
species was warranted, and sought information from the public and
interested parties on the status of the 10 species of penguins. In
addition, we attended the International Penguin Conference in Hobart,
Tasmania, Australia, a quadrennial meeting of penguin scientists from
September 3-7, 2007, to gather information and to ensure that experts
were aware of the status review. We also consulted with other agencies
and range countries in an effort to gather the best available
scientific and commercial information on these species.
On December 3, 2007, the Service received a 60-day Notice of Intent
to Sue from CBD. On February 27, 2008, CBD filed a complaint against
the Department of the Interior for failure to make a 12-month finding
(status determination) on the petition. On September 8, 2008, the
Service entered into a settlement agreement with CBD, in which we
agreed to submit to the Federal Register 12-month findings for the 10
species of penguins, including the African penguin, on or before
December 19, 2008.
On December 18, 2008, the Service published in the Federal Register
a warranted 12-month finding and rule proposing to list the African
penguin as an endangered species under the Act (73 FR 77332). We
implemented the Service's peer review process and opened a 60-day
comment period to solicit scientific and commercial information on the
species from all interested parties following publication of the
proposed rule.
On March 9, 2010, CBD filed a complaint against the Service for
failure to issue a final listing determination for seven penguin
species, including African penguin, within 12 months of the proposals
to list the species. In a court-approved settlement agreement, the
Service agreed to submit a final listing determination for the African
penguin to the Federal Register by September 30, 2010.
Summary of Comments and Recommendations
We base this finding on a review of the best scientific and
commercial information available, including all information received
during the public comment period. In the December 18, 2008, proposed
rule, we requested that all interested parties submit information that
might contribute to development of a final rule. We also contacted
appropriate scientific experts and organizations and invited them to
comment on the proposed listings. We received 604 comments: 602 from
members of the public and 2 from peer reviewers.
We reviewed all comments we received from the public and peer
reviewers for substantive issues and new information regarding the
proposed listing of this species, and we address those comments below.
Overall, the commenters and peer reviewers supported the proposed
listing. Four comments from the public included additional information
for consideration; all other comments simply supported the proposed
listing without providing scientific or commercial data.
Peer Review
In accordance with our policy published on July 1, 1994 (59 FR
34270), we solicited expert opinions from four individuals with
scientific expertise that included familiarity with the species, the
geographic region in which the species occurs, and conservation biology
principles. We received responses from two of the peer reviewers from
whom we requested comments. They generally agreed that the description
of the biology and habitat for the species was accurate and based on
the best available information. New or additional information on the
biology and habitat of the African penguin and threats was provided and
incorporated into the rulemaking as appropriate. In some cases, it has
been indicated in the citations by ``personal communication'' (pers.
comm.), which could indicate either an e-mail or telephone
conversation; while in other cases, the research citation is provided.
Peer Reviewer Comments
(1) Comment: One peer reviewer found the proposed rule to be
thorough, covered the main threats to the African penguin, and used the
best information to accurately describe the biology, habitat,
population trends, and distribution of the species. This peer reviewer
also provided a few technical corrections.
Our Response: We thank the peer reviewer for providing comments on
the proposed rule. Most of the technical corrections that were provided
were minor and did not significantly change the information already
provided in the proposed rule, but rather provided more accuracy or
clarity. Technical and grammatical corrections have been incorporated
into this final rule and have been indicated in the citation as a
personal communication.
(2) Comment: One peer reviewer noted that relevant key literature
was not cited and provided a list of 18 additional references for
review and requested that we incorporate the new data and information
into this final rule and consider it in making our listing
determination.
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Our Response: We reviewed all 18 references and have incorporated
relevant information and additional citations into this final rule.
(3) Comment: One peer reviewer stated that it would be incorrect to
say that half the population of seals starved during the last two
documented El Ni[ntilde]o events, although it was doubtless many did.
Our Response: This information came from an online science
magazine, Science in Africa (2004, p. 2), which stated that during the
last two documented events, the seal population was almost halved after
many adult seals succumbed to starvation, and the entire cohort of pups
either died or aborted. The peer reviewer did not include any citations
on the impact the El Ni[ntilde]o events had on the seal population,
therefore, we did not revise this portion of the rule.
(4) Comment: One peer reviewer provided additional information on
factors contributing to the failure of sardine stocks to recover;
including environmental anomalies and overfishing. In addition, the
peer reviewer stated that, although horse mackerel (Trachurus
trachurus) may have benefitted from the decline in sardine stocks, its
increase in abundance does not appear to be detrimental to the sardine
and should not be regarded as ``replacing'' sardine, as we indicated in
the proposed rule.
Our Response: We have added additional information regarding the
effects of overfishing and environmental anomalies in the Benguela
system on sardine stocks to Factor A. The Present or Threatened
Destruction, Modification, or Curtailment of African Penguin's Habitat
or Range below. Although horse mackerel stocks have increased, it is
likely due to the decrease in sardine stocks caused by high fishing
pressure. Mackerels were able to take advantage of this decrease in a
competitor for zooplankton and increased while sardine stocks
stabilized at a lower abundance. Therefore, it is competition with the
increased horse-mackerel stocks for zooplanton, rather than actual
replacement, that is a concern for the sardine as a vital food source
for the African penguin. We have revised our statement that horse
mackerel has replaced sardines.
(5) Comment: One peer reviewer stated that avian cholera
(Pasteurella multocida) has been reported to affect African penguins
and could have catastrophic consequences for the species.
Our Response: After reviewing pertinent literature, we found that
avian cholera has had a minimal effect on African penguins. During an
outbreak in 1991 on eight islands off western South Africa, mortality
was recorded for small numbers of African penguins on Dassen and Dyer
islands (Crawford et al. 1992, p. 237). From 2002 to 2006, there were
annual outbreaks of avian cholera on Dyer Island. A characteristic of
the avian cholera outbreaks was significant mortality in the Cape
cormorant (Phalacrocorax capensis) with little impact on other species
(Waller and Underhill 2007, p. 109). During the 2004-2005 outbreak,
which was the largest outbreak, only one African penguin death was
recorded (Waller and Underhill 2007, p. 107). However, human presence
during the avian cholera outbreaks may disturb African penguins causing
them to abandon nests, leaving eggs and chicks vulnerable to predation
(Waller and Underhill 2007, p. 109). We have added more information
regarding the effects of human presence during avian cholera outbreaks
to Factor E. Other Natural or Manmade Factors Affecting the Continued
Existence of the Species.
Public Comments
(6) Comment: Several commenters provided supporting data and
information regarding the biology, ecology, life history, population
estimates, threat factors affecting this penguin species, and current
conservation efforts.
Our Response: We thank all the commenters for their interest in the
conservation of this species and thank those commenters who provided
information for our consideration in making this listing determination.
Most information submitted was duplicative of the information contained
in the proposed rule; however, some comments contained information
which provided additional clarity or support to, but did not
substantially change, the information already contained in the proposed
rule. This information has been incorporated into our finding.
Summary of Changes From Proposed Rule
We fully considered comments from the public and peer reviewers on
the proposed rule to develop this final listing of the African penguin.
This final rule incorporates changes to our proposed listing based on
the comments that we received that are discussed above and newly
available scientific and commercial information. Reviewers generally
commented that the proposed rule was very thorough and comprehensive.
We made some technical corrections based on new, although limited,
information. None of the information, however, changed our
determination that listing this species as endangered is warranted.
Species Information
The African penguin is known by three other common names: jackass
penguin, cape penguin, and black-footed penguin. The ancestry of the
genus Spheniscus is estimated at 25 million years, following a split
between Spheniscus and Eudyptula from the basal lineage Aptenodytes
(the ``great penguins,'' emperor and king). Speciation within
Spheniscus is recent, with the two species pairs originating almost
contemporaneously in the Pacific and Atlantic Oceans in approximately
the last 4 million years (Baker et al. 2006, p. 15).
African penguins are the only nesting penguins found on the African
continent. Their breeding range is from Hollamsbird Island, Namibia, to
Bird Island, Algoa Bay, South Africa (Whittington et al. 2000, p. 8),
where penguins form colonies (rookeries) for breeding and molting.
Outside the breeding season, African penguins occupy areas throughout
the breeding range and farther to the north and east. Vagrants have
occurred north to Sette Cama (2 degrees and 32 minutes South (2[deg]32'
S)), Gabon, on Africa's west coast and to Inhaca Island (26[deg]58' S)
and the Limpopo River mouth (24[deg]45' S), Mozambique, on the east
coast of Africa (Shelton et al. 1984, p. 219; Hockey et al. 2005, p.
632). As a coastal species, they are generally spotted within 7.5 miles
(mi) (12 kilometers (km)) of the shore.
There has been abandonment of breeding colonies and establishment
of new colonies within the range of the species. Within the Western
Cape region in southwestern South Africa, for example, penguin numbers
at the two easternmost colonies (on Dyer and Geyser Islands) and three
northernmost colonies (on Lambert's Bay and Malgas and Marcus Islands)
decreased, while the population more than doubled over the 1992-2003
period at five other colonies, including the two largest colonies at
Dassen and Robben Islands (du Toit et al. 2003, p. 1). The most
significant development between 1978 and the 1990s was the
establishment of three colonies that did not exist earlier in the 20th
century--Stony Point, Boulder's Beach in False Bay, and Robben Island,
which now supports the third largest colony for the species (du Toit et
al. 2003, p. 1; Kemper et al. 2007c, p. 326).
Although African penguins are generally colonial breeders, many
also
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breed solitarily or in small, loose groups (Kemper 2009, pers. comm.;
Kemper et al. 2007a, p. 89). They breed mainly on rocky offshore
islands, either nesting in burrows they excavate themselves or under
boulders or bushes, manmade structures, or large items of jetsam
(Kemper et al. 2007a, p. 89), sometimes in depressions under these
structures (Crawford 2009, pers. comm.). Historically, they dug nests
in the layers of sun-hardened guano (bird excrement) that existed on
most islands. However, in the 19th century, European and North American
traders exploited guano as a source of nitrogen, denuding islands of
their layers of guano (Hockey et al. 2005, p. 633; du Toit et al. 2003,
p. 3). Large-scale removal of guano from the Namibian islands has
resulted in a majority of the penguins having to now breed on the
surface (Kemper 2009, pers. comm.; Kemper et al. 2007b, p. 101; Kemper
et al. 2007a, p. 89; Shannon and Crawford 1999, pg. 119).
African penguins have an extended breeding season; colonies are
observed to breed year-round on offshore islands (Brown et al. 1982, p.
77). Broad regional differences do exist, though. The peak of the
breeding season in Namibia generally occurs between October and
February, with a secondary peak between June and October (Kemper 2009,
unpaginated), but variations occur between locations: On Mercury
Island, peaks occur between October and January; on Ichaboe Island,
peaks occur between October and December; on Halifax Island, breeding
peaks between July and August and early December; and on Possession
Island, breeding peaks between November and January (Kemper et al.
2007a, pp. 89 and 91). In South Africa, breeding peaks differ from
those in Namibia: Peak breeding on Dassen and Robben islands occurs
between April and August; on Malgas and Marcus islands and Stony Point,
peak breeding occurs between February and August; and on St. Croix
Island, peak breeding occurs during January with secondary peaks in
March through June (Kemper et al. 2007a, p. 95).
The timing of breeding is thought to coincide with availability of
local food sources (Kemper 2009, unpaginated; Kemper et al. 2007a, p.
95; Randall 1989, p. 247). Breeding pairs are considered monogamous;
about 80 to 90 percent of pairs remain together in consecutive breeding
seasons. The same pair will generally return to the same colony, and
often the same nest site each year. The average age at first breeding
is between 3 and 6 years old (Kemper et al. 2008, p. 810; Whittington
et al. 2005, p. 227; Randall 1989, p. 252). The male carries out nest
site selection, while nest building is by both sexes. Penguins lay a
two-egg clutch (Kemper 2009, unpaginated; Randall 1989, p. 247).
Although population statistics vary from year to year, studies at a
number of breeding islands revealed mean reported adult survival values
per year of 0.81 (Crawford et al. 2006, p. 121). African penguins have
an average lifespan of 10-11 years in the wild. The highest recorded
age in the wild is greater than 27 years (Whittington et al. 2000, p.
81); however, several individual birds have lived to be up to 40 years
of age in captivity.
Feeding habitats of the African penguin are dictated by the unique
marine ecosystem of the coast of South Africa and Namibia. The Benguela
ecosystem, encompassing one of the four major coastal upwelling
ecosystems in the world, is situated along the coast of southwestern
Africa. It stretches from east of the Cape of Good Hope in the south to
the Angola Front to the north, where the Angola Front separates the
warm water of the Angola current from the cold Benguela water (Fennel
1999, p. 177). The Benguela ecosystem is an important center of marine
biodiversity and marine food production, and is one of the most
productive ocean areas in the world, with a mean annual primary
productivity about six times higher than that of the North Sea
ecosystem. The rise of cold, nutrient-rich waters from the ocean depths
to the warmer, sunlit zone at the surface in the Benguela produces rich
feeding grounds for a variety of marine and avian species. The Benguela
ecosystem historically supports a globally significant biomass of
zooplankton, fish, sea birds, and marine mammals, including the African
penguin's main diet of anchovy (Engraulis encrasicolus) and Pacific
sardine (Sardinops sagax) (Berruti et al. 1989, pp. 273-335).
The principal upwelling center in the Benguela ecosystem is
situated in southern Namibia, and is the most concentrated and intense
found in any upwelling regime. It is unique in that it is bounded at
both northern and southern ends by warm water systems, in the eastern
Atlantic and the Indian Ocean's Agulhas current, respectively. Sharp
horizontal gradients (fronts) exist at these boundaries with adjacent
ocean systems (Berruti et al. 1989, p. 276).
African penguins, in general, feed on small fish, cephalopods, and
to a lesser extent, squid (Crawford 2007, p. 229; Ludynia 2007, p. 27;
Crawford et al. 2006, p. 120; Petersen et al. 2006, pp. 14, 18; Randall
1989, p. 251; Crawford et al. 1985, p. 215). In South Africa, anchovy
became the dominate prey of African penguins following the collapse of
the sardine stock in the 1960s (Kemper 2009, pers. comm.; Randall 1989,
p. 251). Studies conducted between 1953 and 1992 showed that anchovies
and sardines contributed 50 to 90 percent by mass of the African
penguin's diet (Crawford et al. 2006, p. 120) and 83 to 85 percent by
number of prey items in studies conducted between 1977 and 1985
(Crawford et al. 2006, p. 120). In Namibia, pilchard (Sardinops
ocellata) were the dominate prey species of African penguins until the
collapse of the sardine stock in the late 1960s to early 1970s (Kemper
et al. 2001, p. 432; Crawford et al. 1985, pp. 225-226). Following the
collapse, pilchard were replaced as dominate prey by pelagic goby
(Sufflogobius bibarbatus) at Mercury and Ichaboe islands and by
cephalopods at Halifax and Possession islands (Kemper 2009, pers.
comm.; Ludynia 2007, pp. 27-28; Kemper et al. 2001, p. 432; Crawford et
al. 1985, pp. 225-226). Trends in regional populations of the African
penguin have been shown to be related to long-term changes in the
abundance and distribution of these sardines and anchovies (Crawford
1998, p. 355; Crawford et al. 2006, p. 122).
Most spawning by anchovy and sardine takes place on the Agulhas
Bank, which is to the southeast of Robben Island, from August to
February (Hampton 1987, p. 908). Young-of-the-year migrate southward
along the west coast of South Africa from March until September, past
Robben Island to join shoals of mature fish over the Agulhas Bank
(Crawford 1980, p. 651). The southern Benguela upwelling system off the
west coast of South Africa is characterized by strong seasonal patterns
in prevailing wind direction, which result in seasonal changes in
upwelling intensity. To produce adequate survival of their young, fish
reproductive strategies are generally well-tuned to the seasonal
variability of their environment (Lehodey et al. 2006, p. 5011). In the
southern Benguela, intense wind-mixing transport of surface waters
creates an unfavorable environment for fish to breed. As a result, both
anchovy and sardine populations have developed a novel reproductive
strategy that is tightly linked to the seasonal dynamics of major local
environmental processes--spatial separation between spawning and
nursery grounds. For both species, eggs spawned over the western
Agulhas Bank (WAB) are transported to the productive west coast nursery
grounds via a coastal jet, which acts like a
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``conveyor belt'' to transport early life stages from the WAB spawning
area to the nursery grounds (Lehodey et al. 2006, p. 5011).
The distance that African penguins have to travel to find food
varies both temporally and spatially according to the season. Off
western South Africa, the mean foraging range of penguins that are
feeding chicks has been recorded to be 5.7 to 12.7 mi (9 to 20 km)
(Petersen et al. 2006, p. 14), mostly within 1.9 mi (3 km) off the
coast (Berruti et al. 1989, p. 307). Foraging duration during chick
provisioning may last anywhere from 8 hours to 3 days, the average
duration being around 10-13 hours (Petersen et al. 2006, p. 14). A
recent study revealed greater foraging ranges between 8.8 and 19.8 mi
(14 and 32 km) for African penguins on Mercury Island and an average
trip duration of 13 hours (Ludynia 2007, pp. 17-18). Ludynia (2007, pp.
28, 30) also reported foraging ranges between 3.9 and 7.1 mi (6 and 11
km) for three African penguins on Possession Island and foraging ranges
between 3.3 and 8.2 mi (5 and 13 km) for two African penguins on
Halifax Island; trip duration ranges between 8-27.5 hours and 3.5-12
hours, respectively. Travel distance from the breeding colony is more
limited when feeding young. Outside the breeding season, adults
generally remain within 248 mi (400 km) of their breeding locality,
while juveniles regularly move in excess of 621 mi (1,000 km) from
their natal island (Randall 1989, p. 250). During the non-breeding
season, some African penguins forage on the Agulhas Bank (Crawford
2009, pers. comm.).
Underhill et al. (2007, p. 65) suggested that the molt period of
African penguins is closely tied to the spawning period of sardine and
anchovy at the Agulhas Bank. Pre-molt birds travel long distances to
the bank to fatten up during this time of the most predictable food
supply of the year. This reliable food source, and the need to gain
energy prior to molting, is hypothesized to be the most important
factor dictating the annual cycle of penguins. In fact, adult birds
have been observed to abandon large chicks in order to move into this
critical pre-molt foraging mode; this is known to occur regularly and
often at a large scale at Dyer Island (Kemper 2009, pers. comm.). The
South African National Foundation for the Conservation of Coastal Birds
(SANCCOB) rescue facility took in over 700 orphaned penguin chicks from
Dyer Island in 2005-2006. Parents abandoned chicks as they began to
molt (SANCCOB 2006, p. 1; SANCCOB 2007a, p. 1). The increasing
observation of abandonment in South Africa is perhaps related to a
slight trend toward earlier molting seasons (Underhill et al. 2007, p.
65).
There has been a severe historical decline in African penguin
numbers in both the South African and Namibian populations. This
decline is accelerating at the present time. The species declined from
millions of birds in the early 1900s (1.4 million adult birds at Dassen
Island alone in 1910) (Ellis et al. 1998, p. 116) to 141,000 pairs in
1956-1957 to 69,000 pairs in 1979-1980 to 57,000 pairs in 2004-2005,
and to about 36,188 pairs in 2006 (Kemper et al. 2007c, pp. 327).
Crawford (2007, in litt.) reported that from 2006-2007, the overall
population declined by 12 percent to 31,000 to 32,000 pairs. The 2009
global population was estimated at 25,262 pairs; equating to a decline
of 60.5 percent over 28 years (three generations) (BirdLife
International 2010, unpaginated).
The species is distributed in about 32 colonies in three major
clusters. In South Africa in 2006, there were 11,000 pairs in the first
cluster at the Eastern Cape, and about 21,000 in the second cluster at
the Western Cape colonies, with 13,283 of these pairs at Dassen Island
and 3,697 at Robben Island. South African totals were down from 32,786
pairs in 2006 to 28,000 pairs in 2007. There were about 3,402 pairs in
the third major cluster in Namibia. The Namibian population has
declined by more than 75 percent since the mid-20th century (from
42,000 pairs in 1956-57) and has been decreasing 2.5 percent per year
between 1990 (when there were 7,000 to 8,000 pairs) and 2005 (Kemper et
al. 2007c, p. 327; Underhill et al. 2007, p. 65; Roux et al. 2007a, p.
55).
On the 2007 International Union for Conservation of Nature (IUCN)
Red List, the African penguin was listed as ``Vulnerable'' on the basis
of steep population declines (Birdlife International 2007, p. 1). Given
the decline observed over 3 generations, a 2007 revision of the
conservation status of the species discussed changing that Red List
status to ``Endangered'' if the declines continued (Kemper et al.
2007c, p. 327). That same assessment, based on 2006 data, concluded
that the Namibian population should already be regarded as Red List
``Endangered'' by IUCN criteria with the probability of extinction of
the African penguin from this northern cluster during the 21st century
rated as high (Kemper et al. 2007c, p. 327). In June of 2010, the
African penguin was uplisted from ``Vulnerable'' to ``Endangered'' on
the 2010 IUCN Red List. The change in status was based on recent data
revealing a continuing rapid population decline, most likely due to
commercial fisheries and shifts in prey populations, with no signs of
reversing (BirldLife International 2010, unpaginated).
Breeding no longer occurs at seven localities where it formerly
occurred or has been suspected to occur--Seal, North Long, North Reef,
and Albatross Islands in Namibia, and Jacobs Reef, Quoin, and Seal
(Mossel Bay) Islands in South Africa (Kemper 2009, pers. comm.; Kemper
et al. 2007c, p. 326; Crawford et al. 1995a, p. 269). In the 1980s,
breeding started at two mainland sites in South Africa (Boulder's Beach
and Stony Point) for which no earlier records of breeding exist. There
is no breeding along the coast of South Africa's Northern Cape
Province, which lies between Namibia and Western Cape Province (Ellis
et al. 1998, p. 115).
Summary of Factors Affecting the Species
Section 4 of the Act (16 U.S.C. 1533) and its implementing
regulations at 50 CFR 424 set forth the procedures for adding species
to the Federal Lists of Endangered and Threatened Wildlife and Plants.
A species may be determined to be an endangered or threatened species
due to one or more of the five factors described in section 4(a)(1) of
the Act. The five factors are: (A) The present or threatened
destruction, modification, or curtailment of its habitat or range; (B)
overutilization for commercial, recreational, scientific, or
educational purposes; (C) disease or predation; (D) the inadequacy of
existing regulatory mechanisms; and (E) other natural or manmade
factors affecting its continued existence. These factors and their
application to the African penguin are discussed below.
Factor A. The Present or Threatened Destruction, Modification, or
Curtailment of African Penguin's Habitat or Range
The habitat of the African penguin consists of terrestrial breeding
and molting sites and the marine environment, which serves as a
foraging range both during and outside of the breeding season.
Modification of their terrestrial habitat is a continuing threat to
African penguins. This began in the mid-1880s with the mining of
seabird guano at islands colonized by the African penguin and other
seabirds in both South Africa and Namibia. Harvesting of the guano cap
began in 1845 (du Toit et al. 2003, p. 3; Griffin 2005, p. 16) and
continued over decades, denuding the islands of guano. Deprived of
their primary nest-building material, the
[[Page 59650]]
penguins were forced to nest on the surface in the open, where their
eggs and chicks are more vulnerable to predators such as kelp gulls
(Larus dominicanus), disturbance, heat stress, and flooding (Kemper et
al. 2007b, p. 101; Griffin 2005, p. 16; Shannon and Crawford 1999, p.
119).
Without cover provided by burrows excavated in the guano, birds are
more likely to flee from aerial predators or disturbance caused by
humans, leaving the nests exposed (Kemper et al. 2007b, p. 104).
Additionally, instead of being able to burrow into the guano, where
temperature extremes are ameliorated, penguins nesting in the open are
subjected to heat stress (Kemper et al. 2007b, p. 101; Shannon and
Crawford 1999, p. 119). Kemper et al. (2007b, p. 101) noted an event in
which the air temperature rose to 98.6 degrees Fahrenheit ([deg]F) (37
degrees Celsius ([deg]C)), resulting in the death of 68 chicks
constituting 37 percent of the surface-nesting chicks. Adapted for life
in cold temperate waters, penguins have insulating fatty deposits to
prevent hypothermia and black-and-white coloring that provides
camouflage from predators at sea. These adaptations cause problems of
overheating while they are on land incubating eggs and brooding chicks
during the breeding season. Furthermore, rainstorms are uncommon,
however, they can be severe and flooding of nests may occur (Kemper et
al. 2007b, p. 101).
Although guano harvesting is now prohibited in penguin colonies, it
continues sporadically at Ichaboe Island (Kemper 2009, unpaginated),
and many penguins continue to suffer from the lack of protection and
heat stress due to the loss of this optimal breeding habitat substrate.
We have not identified information on how quickly guano deposits may
build up again to depths which provide suitable burrowing substrate;
however, since guano scraping ceased, the accumulation of penguin guano
has been minimal because the population is small (Waller and Underhill
2007, p. 109), and the more the population decreases, the slower the
guano will build (Kemper 2009, pers. comm.). Because penguins are now
forced to nest on the surface and natural features available for cover
(e.g., bushes and rock overhangs) are limited, penguins may also use
abandoned buildings for protection. However, these sites provide poor
lighting and damp conditions often with flea and tick infestations, and
chicks appear in poor condition at these locations (Kemper et al.
2007b, p. 105). Kemper et al. (2007b, p. 104) noted that, excluding
nests in buildings, nests with cover had better overall breeding
success than exposed nests.
In Namibia, low-lying African penguin breeding habitat is being
lost due to flooding from increased coastal rainfall and sea level rise
of 0.07 inches (1.8 millimeters) a year over the past 30 years (Roux et
al. 2007b, p. 6). Almost 11 percent of the nests on the four major
breeding islands (which contain 96 percent of the Namibian population)
are experiencing a moderate to high risk of flooding (Roux et al.
2007b, p. 6). Continued increases in coastal flooding from rising sea
levels predicted by global and regional climate change models (Bindoff
et al. 2007, p. 409, 412) are predicted to increase the number and
proportion of breeding sites at risk and lead to continued trends of
decreased survival and decreased breeding success (Roux et al. 2007b,
p. 6).
Competition for breeding habitat with Cape fur seals (Arctocephalus
pusillus pusillus) has been cited as a reason for abandonment of
breeding at five former breeding colonies in Namibia and South Africa,
and expanding seal herds have displaced substantial numbers of breeding
penguins at other colonies (Ellis et al. 1998, p. 120; Crawford et al.
1995a, p. 271).
Changes to the marine habitat present a significant threat to
populations of African penguins. African penguins have a long history
of shifting colonies and fluctuations in numbers at individual colonies
in the face of shifting food supplies (Crawford 1998, p. 362). These
shifts are related to the dynamics between prey species and to
ecosystem changes, such as reduced or enhanced upwelling (sometimes
associated with El Ni[ntilde]o events), changes in sea surface
temperature, or movement of system boundaries. In addition to such
continuing cyclical events, the marine habitats of the Western Cape and
Namibian populations of African penguins are currently experiencing
directional ecosystem changes attributable to global climate change;
overall sea surface temperature increases occurred during the 1900s
and, as detailed above, sea level has been rising steadily in the
region over the past 30 years (Bindoff et al. 2007, p. 391; Fidel and
O'Toole 2007, p. 22, 27; Roux et al. 2007a, p. 55).
At the Western Cape of South Africa, a shift in sardine
distribution to an area outside the current breeding range of the
African penguin led to a 45 percent decrease, between 2004 and 2006, in
the number of penguins breeding in the Western Cape and increased adult
mortality as the availability of sardine decreased for the major
portion of the African penguin population located in that region
(Crawford et al. 2007a, p. 8). From 1997 to the present, the
distribution of sardine concentrations off South Africa has steadily
shifted to the south and east, from its long-term location off colonies
at Robben Island to east of Cape Infanta on the southern coast of South
Africa east of Cape Agulhas, 248 mi (400 km) from the former center of
abundance (Crawford et al. 2007a, p. 1).
This shift is having severe consequences for penguin populations.
Off western South Africa, the foraging range of penguins that are
feeding chicks is estimated to be 5.7 to 12.7 mi (9 to 20 km) (Petersen
et al. 2006, p. 14), and while foraging they generally stay within 1.9
mi (3 km) of the coast (Berruti et al. 1989, p. 307). The
southeasternmost Western Cape Colonies occur at Dyer Island, which is
southeast of Cape Town and about 47 mi (75 km) northwest of Cape
Agulhas. Therefore, the current sardine concentrations are out of the
foraging range of breeding adults at the Western Cape breeding colonies
(Crawford et al. 2007a, p. 8), which between 2004 and 2006 made up
between 79 and 68 percent of the rapidly declining South African
population (Crawford et al. 2007a, p. 7).
Further, as described in Crawford (1998, p. 360), penguin
abundances at these Western Cape colonies have historically shifted
north and south according to sardine and anchovy abundance and
accessibility from breeding colonies, but the current prey shift is to
a new center of abundance outside the historic breeding range of this
penguin species. Although one new colony has appeared east of existing
Western Cape colonies, more significantly, there has been a significant
decrease in annual survival rate for adult penguins from 0.82 to 0.72
(Crawford et al. 2008, p. 181) in addition to the 45 percent decrease
in breeding pairs in the Western Cape Province. Exacerbating the
problem of shifting prey, the authors reported that the fishing
industry, which is tied to local processing capacity in the Western
Cape, is competing with the penguins for the fish that remain in the
west, rather than following the larger sardine concentrations to the
east (See Factor E) (Crawford et al. 2007a, pp. 9-10).
Changes in the northern Benguela ecosystem are also affecting the
less numerous Namibian population of the African penguin. Over the past
3 decades, sea surface temperatures have steadily increased and
upwelling intensity has decreased in the northern Benguela region.
These long-term
[[Page 59651]]
changes have been linked to declines in penguin recruitment at the four
main breeding islands from 1993-2004 (Roux et al. 2007a, p. 55).
Weakened upwelling conditions have a particular impact on post-fledge
young penguins during their first year at sea, explaining 65 percent of
the variance in recruitment during that period (Roux et al. 2007b, p.
9). These young penguins are particularly impacted by increasingly
scarce or hard-to-find prey. Even after heavy fishing pressure was
eased in this region in the 1990s, sardine stocks in Namibia have
failed to recover, causing economic shifts for humans and foraging
difficulties for penguins. Remaining sardine stocks in Namibia have
contracted to the north out of reach of breeding penguins tied to the
vicinity of their breeding locations (Kemper 2009, pers. comm.; Kemper
et al. 2001, p. 432). This failure to recover has been attributed to
oxygen-poor conditions (Sakko 1998, p. 428); El Ni[ntilde]os, which
have resulted in failed recruitment of sardines and mass mortality of
sardines and other pelagic fish (Kemper 2009, pers. comm.; Roux et al.
2007b p. 12; Sakko 1998, p. 428); years of poor recruitment exacerbated
by continued fishing pressure (Kemper 2009, pers. comm.; Boyer et al.
2001, pp. 67, 81-83); competition with horse mackerel (Trachurus
trachurus) (Kemper 2009, pers. comm.; Shannon et al. 2000, p. 721); and
the continuing warming trend (Benguela Current Large Marine Ecosystem
(BCLME) 2007, pp. 2-3).
El Ni[ntilde]o events also impact the Benguela marine ecosystem on
a decadal frequency (Benguela Ni[ntilde]o). These occur when warm
seawater from the equator moves along the southwest coast of Africa
towards the pole and penetrates the cold up-welled Benguela current.
During the 1995 event, for example, the entire coast from Angola's
Cabinda province to central Namibia was covered by abnormally warm
water--in places up to 14.4 [deg]F (8 [deg]C) above average--to a
distance up to 186 mi (300 km) offshore (Science in Africa 2004, p. 2).
During the last two documented events, there have been mass mortalities
of penguin prey species, prey species recruitment failures, and mass
mortalities of predator populations, including starvation of over half
of the seal population. The penguin data sets are not adequate to
estimate the effects of Benguela Ni[ntilde]o events at present, but
based on previous observations of impact on the entire food web of the
northern Benguela, they are most likely to be negative (Roux et al.
2007b, p. 12). With increasing temperatures associated with climate
change in the northern Benguela ecosystem, the frequency and intensity
of Benguela Ni[ntilde]o events and their concomitant effects on the
habitat of the African penguin are predicted to increase in the
immediate upcoming years as new Benguela Ni[ntilde]o events emerge
(Roux et al. 2007b, p. 5).
A third factor in the marine habitat of the Namibian populations is
the extent of sulfide eruptions during different oceanographic
conditions. Hydrogen sulfide accumulates in bottom sediments and erupts
to create hypoxic (a reduced concentration of dissolved oxygen in a
water body leading to stress and death in aquatic organisms) or even
anoxic (lacking oxygen) conditions over large volumes of the water
column (Ludynia et al. 2007, p. 43; Fidel and O'Toole 2007 p. 9).
Penguins, whose foraging range is restricted by the central place of
their breeding colony location (Petersen et al. 2006, p. 24), are
forced to forage in these areas, but their preferred prey of sardines
and anchovies is unable to survive in these conditions. African
penguins foraging in areas of sulfide eruptions expend greater amounts
of energy through benthic dives in pursuit of available food tolerant
of low-oxygen conditions, primarily the pelagic goby (Sufflogobius
bibarbatus), which has lower energy content than the penguins'
preferred prey of anchovies and sardines (Ludynia 2007, pp. 45-58;
Crawford et al. 1985, p. 224). The Namibian population of African
penguins, restricted in their breeding locations, will continue to be
negatively impacted by this ongoing regime shift away from sardines and
anchovies to pelagic goby and jellyfish. Like Benguela Ni[ntilde]os
events, these sulphide eruptions are predicted to increase with
continuing climate change (Ludynia et al. 2007, p. 43); eruptions
appear to be coincident with increased intensity of wind-driven coastal
upwelling and low-pressure weather cells (e.g., sudden warming of sea
surface and interruption of coastal upwelling), both of which can be
affected by climate change (Weeks et al. 2004, p. 153). Furthermore,
these sulphide eruptions could potentially contribute to climate change
through additional emissions of methane gas into the atmosphere;
however, further studies are needed to determine the extent of the
effects on climate change (Bakun and Weeks 2004, pp. 1,021-1,022).
We have identified a number of threats to the coastal and marine
habitat of the African penguin that have operated in the past, are
impacting the species now, and will continue to impact the species in
the immediate coming years and into the future. On the basis of this
analysis, we find that the present and threatened destruction,
modification, or curtailment of both its terrestrial and marine
habitats is a threat to the African penguin.
Factor B. Overutilization for Commercial, Recreational, Scientific, or
Educational Purposes
The current use of African penguins for commercial, recreational,
scientific, or educational purposes is generally low. Prior estimates
of commercial collection of eggs for food from Dassen Island alone were
500,000 in 1925, and more than 700,000 were collected from a number of
localities in 1897 (Shelton et al. 1984, p. 256). Since 1968, however,
commercial collection of penguin eggs for food has ceased.
There are unconfirmed reports of penguins being killed as use for
bait in rock-lobster traps. Apparently, they are attractive as bait
because their flesh and skin is relatively tough compared to that of
fish and other baits. The extent of this practice is unknown, and most
reports emanate from the Namibian islands (Ellis et al. 1998, p. 121).
Use for nonlethal, scientific purposes is highly regulated and does not
pose a threat to populations (See analysis under Factor D).
In 1975, the African penguin was listed on Appendix II of the
Convention on International Trade in Endangered Species of Wild Fauna
and Flora (CITES). CITES is an international agreement between
governments to ensure that the international trade of CITES-listed
plant and animal species does not threaten species' survival in the
wild. There are currently 175 CITES Parties (member countries or
signatories to the Convention). Under this treaty, CITES Parties
regulate the import, export, and reexport of CITES-protected plants and
animal species (also see Factor D). Trade must be authorized through a
system of permits and certificates that are provided by the designated
CITES Scientific and Management Authorities of each CITES Party (CITES
2010a, unpaginated).
Between the time the African penguin was listed in CITES in 1975
and 2008, 299 CITES-permitted shipments have been reported to the
United Nations Environment Programme-World Conservation Monitoring
Center (UNEP-WCMC). Of these shipments, 80 (27 percent) were reportedly
imported into the United States and 25 (8 percent) were shipments
permitted for export from the United States (UNEP-WCMC 2010,
unpaginated). With the information given in the UNEP-WCMC
[[Page 59652]]
database, between 1975 and 1993, approximately 30 shipments (275
individuals) of live African penguins of unknown origin were traded.
Between 1994 and 2003, approximately 7 shipments (42 individuals) of
live, wild African penguins were traded for the following purposes:
scientific, personal, biomedical, commercial, zoological display, and
reintroduction or introduction into the wild. There has been no trade
in live, wild African penguins reported since 2003. The other 262
shipments involved trade in live pre-Convention (20 specimens) or
captive-born/captive-bred penguins (952 specimens) and trade in parts
and products (2,738 scientific specimens, 39 bodies, 121 feathers, 16
skeletons, 6 skins, 8 skulls, and 4 personal sport-hunted trophies).
As a species listed in Appendix II of CITES, commercial trade is
allowed. However, CITES requires that before an export can occur, a
determination must be made that the specimens were legally obtained (in
accordance with national laws) and that the export will not be
detrimental to the survival of the species in the wild. Based on the
low numbers of live, wild African penguins in trade since 1994 and that
the trade in parts and products from wild specimens is primarily
scientific samples, we believe that international trade controlled via
valid CITES permits is not a threat to the species.
On the basis of this analysis, we find that overutilization for
commercial, recreational, scientific, or educational purposes is not a
threat to the African penguin now or in the foreseeable future.
Factor C. Disease or Predation
African penguins are hosts to a variety of parasites and diseases
(Ellis 1998, pp. 119-120), including avian cholera (Pasteurella
multocida) and avian malaria (Plasmodium relictum). During an outbreak
of avian cholera in 1991 on eight islands off western South Africa,
mortality was recorded for small numbers of African penguin on Dassen
and Dyer islands (Crawford et al. 1992, p. 237). From 2002 to 2006,
there were annual outbreaks of avian cholera on Dyer Island; however, a
characteristic of the avian cholera outbreaks was significant mortality
for a single species (Cape cormorant Phalacrocorax capensis) with
little impact on other species (Waller and Underhill 2007, p. 109).
During the 2004-2005 outbreak, which was the largest in extent, only
one African penguin death was recorded (Waller and Underhill 2007, p.
107). Therefore, we find that avian cholera has had a minimal effect on
African penguins. Although avian malaria does not normally occur in
wild populations, there is a high prevalence of the disease in birds
held in captivity. The absence of avian malaria in wild penguins can be
explained by factors such as age-related immunity to malarias,
mosquito-impeding feathers, and escape from mosquitoes into the water
(Graczyk et al. 1995, p. 704). Those penguins held in captivity are
subject to more intense exposure to malarial parasites, but also, most
of the birds in captivity are being rehabilitated from exposure to oil
pollution, which can immobilize penguins and impair the feather barrier
and make the bird more vulnerable to mosquito attacks (Graczyk et al.
1995, pp. 705-706). Release of infected rehabilitated birds could pose
a hazard to wild penguins once they are released (Graczyk et al. 1995,
p. 703). However, we could not find any information on the large-scale
effect of avian malaria on African penguin populations. The primary
concern is preventing the transmission of disease from the large
numbers of African penguins rehabilitated after oiling to wild
populations (Graczyk et al. 1995, p. 706).
Predation by Cape fur seals of protected avian species has become
an issue of concern to marine and coastal managers in the Benguela
ecosystem as these protected seals have rebounded to become abundant
(1.5 to 2 million animals) (David et al. 2003, pp. 289-292). Not all
seals feed on penguins, usually just subadult male individuals (Kemper
2009, pers. comm.; Mecenero et al. 2005, p. 510; du Toit et al. 2004,
pp. 45, 50). Although only a few individuals may be responsible for
predation on African penguins, they can have a detrimental effect on
small colonies (Mecenero et al. 2005, pp. 509, 511). At Dyer Island,
842 penguins in a colony of 9,690 individuals (8.7 percent) were killed
in 1995-1996 (Marks et al. 1997, p. 11). At Lambert's Bay, seals kill 4
percent of adult African penguins annually (Crawford et al. 2006, p.
124; Crawford et al. 2001, p. 440). The practice of removing problem
individuals has been advocated in South Africa's Policy on the
Management of Seals, Seabirds, and Shorebirds, which allows for the
culling of specific seals responsible for the predation of seabirds of
conservation concern (Kemper 2009, pers. comm.; Department of
Environmental Affairs and Tourism 2007, p. 6). Some seals killing
penguins have been removed from South African localities (Crawford
2009, pers. comm.), and confirmed problem seals are culled at three
islands (Mercury, Ichaboe, and Possession islands) in Namibia (Kemper
2009, pers. comm.); however, it should be noted that 40 percent of the
Namibia seal population has shifted north of its breeding range away
from penguin breeding locations and main foraging areas (Kemper 2009,
pers. comm.; Kemper et al. 2007c, p. 339).
Predation on eggs and small chicks of African penguins by kelp
gulls is a concern brought on through human disturbance. As described
under Factor A, the historic harvesting of guano deprived African
penguins of their primary nest-building material, forcing them to nest
on the surface in the open where birds are more likely to flee from
aerial predators and human disturbance (see Factor E), leaving their
eggs and chicks more vulnerable to predators such as kelp gulls (Kemper
et al. 2007b, pp. 101, 104; Griffin 2005, p. 16; Shannon and Crawford
1999, p. 119).
On the basis of this information, we find that predation, in
particular by Cape Fur Seals that prey on significant numbers of
African penguins at their breeding colonies, is a threat to the African
penguin, and we have no reason to believe the threat will be
ameliorated in the foreseeable future.
Factor D. Inadequacy of Existing Regulatory Mechanisms
The African penguin is listed on Appendix II of CITES. CITES, an
international treaty among 175 nations, including Namibia, South
Africa, Congo, Gabon, Mozambique, and the United States, entered into
force in 1975. In the United States, CITES is implemented through the
U.S. Endangered Species Act. The Secretary of the Interior has
delegated the Department's responsibility for CITES to the Director of
the Service and established the CITES Scientific and Management
Authorities to implement the treaty.
CITES provides varying degrees of protection to more than 32,000
species of animals and plants that are traded as whole specimens,
parts, or products. Under this treaty, member countries work together
to ensure that international trade in animal and plant species is not
detrimental to the survival of wild populations by regulating the
import, export, and reexport of CITES-listed animal and plant species
(USFWS 2010, unpaginated). Under CITES, a species is listed at one of
three levels of protection (i.e., regulation of international trade),
which have different permit requirements (CITES 2010b, unpaginated).
Appendix II includes species requiring regulation of international
trade in order to ensure
[[Page 59653]]
that trade of the species is compatible with the species' survival.
International trade in specimens of Appendix-II species is authorized
when the permitting authority has determined that the export will not
be detrimental to the survival of the species in the wild and that the
specimens to be exported were legally acquired (CITES 2010a,
unpaginated). As discussed under Factor B, we do not consider
international trade to be a threat impacting the African penguin.
Therefore, protection under this Treaty is an adequate regulatory
mechanism.
This species is also included under Appendix II of the Convention
on Migratory Species (CMS), of which South Africa is a Party. Inclusion
in Appendix II encourages multistate and regional cooperation for
conservation (CMS 2009, p. 6). The African-Eurasian Waterbird Agreement
(AEWA) was developed under CMS auspices and became effective on
November 1, 1999. The Agreement covers 119 Range States in Africa,
Europe, parts of Canada, Central Asia, and the Middle East and focuses
on 255 waterbird species, including the African penguin (AEWA 2010, p.
10; AEWA 2008, p. 1). Parties to the Agreement are encouraged to engage
in a wide range of conservation actions provided in a comprehensive
Action Plan (2009-2012). These actions address species and habitat
conservation, management of human activities, research and monitoring,
education and information, and implementation (AEWA 2010, p. 11).
Under South Africa's Biodiversity Act of 2004, the African penguin
is classified as a protected species, defined as an indigenous species
of ``high conservation value or national importance'' that requires
national protection (Republic of South Africa 2004, p. 52; Republic of
South Africa 2007, p. 10). Activities that may be carried out with
respect to such species are restricted and cannot be undertaken without
a permit (Republic of South Africa 2004, p. 50). Restricted activities
include among other things: Hunting, capturing, or killing living
specimens of listed species by any means; collecting specimens of such
species (including the animals themselves, eggs, or derivatives or
products of such species); importing, exporting, or reexporting; having
such specimens within one's physical control; or selling or otherwise
trading in such specimens (Republic of South Africa 2004, p. 18).
The species is classified as `endangered' in Nature and
Environmental Conservation Ordinance, No. 19 of the Province of the
Cape of Good Hope (Western Cape Nature Conservation Laws Amendment Act
2000, p. 88), providing protection from hunting or requiring a permit
for possession of the species. According to Ellis et al. (1998, p.
115), this status applies to the Northern Cape, Western Cape, and
Eastern Cape Provinces as well.
In Namibia, the African penguin is listed as a ``Specially
Protected Bird,'' under the draft Parks and Wildlife Management Bill
2001, due to the recent rapid decline (Kemper 2009, unpaginated;
Ministry of Fisheries and Marine Resources 2009, p. 22; Kemper et al.
2007c, p. 326); however, we could not find any information indicating
this bill has been finalized. Under the Namibian Marine Resources Act
of 2000 (Part IV, 18(1)(b) and (c)), except in terms of an exploratory
right or an exemption, a person may not kill, disturb, or maim any
penguin or harvest any bird on any island, rock, or guano platform in
Namibian waters, or on the shore seaward of the high-water mark, or in
the air above such areas. This Act also addresses discharge of
injurious substances into the marine environment and killing or
disabling of marine animals (Ministry of Fisheries and Marine Resources
2009, p. 43). Additionally, all Namibian breeding locations for the
African penguin fall within the recently proclaimed Namibian Island's
Marine Protected Area (MPA) (Kemper 2009, pers. comm.). One of the key
goals of the MPA is to provide greater protection to the breeding and
foraging habitat of endangered seabirds, including the African penguin.
The MPA will provide high protection status for specific islands and,
among other marine-related issues, addresses landing on islands, guano
scraping, mining, boat-based eco-tourism, and risks associated with
shipping-related threats, such as oil spills (Ministry of Fisheries and
Marine Resources 2009, pp. 51-88).
Kemper et al. (2007c, p. 326) reported that African penguin
colonies in South Africa are all protected under authorities ranging
from local, to provincial, to national park status, and all Namibian
breeding colonies are under some protection, from restricted access to
national park status. While we have no information that allows us to
evaluate their overall effectiveness, these national, regional, and
local measures to prohibit activities involving African penguins
without permits issued by government authorities and to control or
restrict access to African penguin colonies are appropriate to
protecting African penguins from land-based threats, such as harvest of
penguins or their eggs, disturbance from tourism activities, and
impacts from unregulated, scientific research activities.
The South African Marine Pollution (Control and Civil Liability)
Act (No. 6 of 1981) (SAMPA) provides for the protection of the marine
environment (the internal waters, territorial waters, and exclusive
economic zone) from pollution by oil and other harmful substances, and
is focused on preventing pollution and determining liability for loss
or damage caused by the discharge of oil from ships, tankers, and
offshore installations. The SAMPA prohibits the discharge of oil into
the marine environment, sets requirements for reporting discharge or
likely discharge and damage, and designates the South African Maritime
Safety Authority the powers of authority to take steps to prevent
pollution in the case of actual or likely discharge and to remove
pollution should it occur, including powers of authority to direct ship
masters and owners in such situations. The SAMPA also contains
liability provisions related to the costs of any measures taken by the
authority to reduce damage resulting from discharge (Marine Pollution
(Control and Civil Liability) Act of 1981 2000, pp. 1-22).
South Africa is a signatory to the 1992 International Convention on
Civil Liability for Oil Pollution Damages and its Associate Fund
Convention (International Fund for Animal Welfare (IFAW) 2005, p. 1),
and southern South African waters have been designated as a Special
Area by the International Maritime Organization, providing measures to
protect wildlife and the marine environment in an ecologically
important region used intensively by shipping (International Convention
for the Prevention of Pollution from Ships (MARPOL) 2006, p. 1). One of
the prohibitions in such areas is on oil tankers washing their cargo
tanks.
Despite these existing regulatory mechanisms, the African penguin
continues to decline due to the effects of habitat destruction,
predation, and oil pollution. We find that these regulatory and
conservation measures have been insufficient to significantly reduce or
remove the threats to the African penguin and, therefore, that the
inadequacy of existing regulatory mechanisms is a threat to this
species.
Factor E. Other Natural or Manmade Factors Affecting the Continued
Existence of the Species
Over the period from 1930 to the present, fisheries harvest by man
and more recently competition from fisheries, as well as seals, have
hindered
[[Page 59654]]
the African penguin's historical ability to rebound from oceanographic
changes and prey regime shifts. The reduced carrying capacity of the
Benguela ecosystem presents a significant threat to survival of African
penguins (Crawford et al. 2007b, p. 574).
Crawford (1998, pp. 355-364) described the historical response of
African penguins to regime shifts between their two primary prey
species, sardines and anchovies, both in terms of numbers and colony
distribution from the 1950s through the 1990s. There was a repeated
pattern of individual colony collapse in some areas and, as the new
food source became dominant, new colony establishment and population
increase in other areas. Crawford (1998, p. 362) hypothesized that
African penguins have coped successfully with many previous sardine-
anchovy shifts. Specific mechanisms, such as the emigration of first-
time breeders from natal colonies to areas of greater forage abundance
may have historically helped them successfully adapt to changing prey
location and abundance. However, over the period from the 1930s to the
1990s, competition for food from increased commercial fish harvest and
from burgeoning fish take by recovering populations of the Cape fur
seal appears to have overwhelmed the ability of African penguins to
compete; the take of fish and cephalopods by man and seals increased by
2 million tons (T) (1.8 million tonnes (t)) per year from the 1930s to
the 1980s (Crawford 1998, p. 362). Crawford et al. (2007b, p. 574)
conclude that due to the increased competition with purse-seine (net)
fisheries and abundant fur seal populations, the carrying capacity of
the Benguela ecosystem for African penguins has declined by 80 to 90
percent from the 1920s to the present day. In the face of increased
competition and reduced prey resources, African penguin populations are
no longer rebounding successfully from underlying prey shifts and have
experienced sharply decreased reproductive success. Kemper (2009, pers.
comm.; Kemper et al. 2007c, p. 339) has noted, however, that the
Namibian Cape fur seal population is shifting north, away from penguin
breeding and foraging areas.
These negative effects of decreased prey availability on
reproductive success and on population size have been documented.
Breeding success of African penguins was measured at Robben Island from
1989 to 2004 (Crawford et al. 2006, p. 119) in concert with hydro-
acoustic surveys to estimate the spawner biomass of anchovy and sardine
off South Africa. When the combined spawner biomass of fish prey was
less than 2 million T (1.8 million t), pairs of African penguins
fledged an average of only 0.46 chicks annually. When it was above 2
million T (1.8 million t), annual breeding success had a mean value of
0.73 chicks per pair (Crawford et al. 2006, p. 119). The significant
relationships obtained between breeding success of African penguins and
estimates of the biomass of their fish prey confirm that reproduction
is influenced by the abundance of food (Adams et al. 1992, p. 969;
Crawford et al. 1999, p. 143). The levels of breeding success recorded
in the most recent studies of the African penguin were found to be
inadequate to sustain the African penguin population (Crawford et al.
2006, p. 119).
In addition to guano collection, as described in Factor A,
disturbance of breeding colonies may arise from other human activities
such as tourism (Ellis et al. 1998, p. 121). Such disturbances can
cause the penguins to panic and desert their nesting sites. In both
South Africa and Namibia, there is increasing pressure to open penguin
viewing areas for tourism. Although this type of tourism is currently
occurring, it is in Boulders, South Africa, where penguins are used to
human presence, and the tourism is being conducted in a controlled
manner (Kemper 2009, pers. comm.). Unless other areas identified for
tourism development are carefully controlled, the disturbance could be
detrimental to breeding success (Kemper 2009, pers. comm.).
Exploitation and disturbance by humans is probably the reason for
penguins ceasing to breed at four colonies, one of which has since been
re-colonized (Crawford et al. 1995b, p. 112). Burrows can be
accidentally destroyed by humans walking near breeding sites, leading
to penguin mortality. In addition, human-caused disturbance during
avian cholera outbreaks may affect African penguins. Although avian
cholera mainly affects Cape cormorants, human presence to remove
carcasses, in an effort to reduce the spread of the disease, is
considered a high disturbance activity and has caused penguins to move
from nests exposing eggs and chicks to predation by kelp gulls (Waller
and Underhill 2007, p. 109).
Oil and chemical spills can have direct effects on the African
penguin. Based on previous incidents and despite national and
international measures to prevent and respond to oil spills referenced
in Factor D, we consider this to be a significant threat to the
species. African penguins live along the major global transport route
for oil and have been frequently impacted by both major and minor oil
spills. Since 1948, there have been 13 major oil spill events in South
Africa, each of which oiled from 500 to 19,000 African penguins. Nine
of these involved tanker collisions or groundings, three involved oil
of unknown origins, and one involved an oil supply pipeline bursting in
Cape Town harbor (Underhill 2001, pp. 2-3). In addition to these major
events, which are described in detail below, there are a significant
number of smaller spill events, impacting smaller number of birds.
These smaller incidental spills result in about 1,000 oiled penguins
being brought to SANCCOB, which has facilities to clean oiled birds,
over the course of each year (Adams 1994, pp. 37-38; Underhill 2001, p.
1). Overall, from 1968 to the present, SANCCOB (2007b, p. 2), has
handled more than 83,000 oiled sea birds, including many African
penguins.
The most recent oil spill occurred in April 2009 when oil began
leaking from the hull of a fishing trawler, Meob Bay, which sank in
June 2002. Approximately 62 mi (100 km) of coastline, from Possession
Island to Mercury Island (prime breeding locations), were affected. At
least 160 African penguins were rescued and taken to rehabilitation
facilities to be treated (Bause 2009, unpaginated). The most serious
event occurred on June 23, 2000, when the iron ore carrier Treasure
sank between Robben and Dassen Islands, where the largest and third-
largest colonies of African penguin occur (Crawford et al. 2000, pp. 1-
4). Large quantities of oil came ashore at both islands. South Africa
launched a concerted effort to collect and clean oiled birds, to move
nonoiled birds away from the region, to collect penguin chicks for
artificial rearing, and to clean up oiled areas. Nineteen thousand
oiled African penguins were brought for cleaning to the SANCCOB
facility. An additional 19,500 penguins were relocated to prevent them
from being oiled. In total, 38,500 birds were handled in the context of
this major oil spill. The last oil was removed from Treasure on July
18, 2000. Two months after the spill, mortality of African penguins
from the spill stood at 2,000 adults and immature birds and 4,350
chicks (Crawford et al. 2000, p. 9). The Avian Demography Unit (ADU) of
the University of Cape Town has undertaken long-term monitoring of
penguins released after spill incidents. Response in the Treasure spill
and success in rehabilitation have shown that response efforts have
improved dramatically.
[[Page 59655]]
The next most serious spill of the Apollo Sea, which occurred in
June 1994, released about 2,401 T (2,177 t) of fuel oil near Dassen
Island. About 10,000 penguins were contaminated with only 50 percent of
these birds successfully de-oiled and put back in the wild. Over the 10
years following this spill, the ADU followed banded released birds to
monitor their survival and reproductive histories (Wolfaardt et al.
2007, p. 68). They found that success in restoring oiled birds to the
point that they attempt to breed after release has steadily improved.
The breeding success of restored birds and the growth rates of their
chicks, however, are lower than for nonoiled birds. Nevertheless,
because adults could be returned successfully to the breeding
population, they concluded that de-oiling and reintroduction of adults
are effective conservation interventions (Wolfaardt et al. 2007, p.
68).
Therefore, we find that immediate and ongoing competition for food
resources with fisheries and other species, overall decreases in food
abundance, and ongoing severe direct and indirect threat of oil
pollution are threats to the African penguin.
African Penguin Finding
The African penguin is presently in a serious, accelerating decline
throughout its range, with a 60.5 percent decline over 28 years (three
generations). This verified, accelerating, and immediate decline across
all areas inhabited by African penguin populations are directly
attributable to ongoing threats that are severely impacting the species
at this time. Historical threats to terrestrial habitat, such as
destruction of nesting areas for guano collection and the threat of
direct harvest, have been overtaken by long-term competition for prey
from human fisheries beginning in the 1930s. The impact of competition
from fisheries is now exacerbated by the increased role of abundant
Cape fur seal populations throughout the range in competing for the
prey of the African penguin (Crawford 1998, p. 362). In combination,
competition with fisheries and fur seals have reduced the carrying
capacity of the marine environment for African penguins to 10 to 20
percent of its 1920s value and by themselves represent significant
immediate threats to the African penguin throughout all of its range.
Changes in the different portions of the range of the African
penguin are adding additional stressors to the overall declines in the
prey of African penguins. In Namibia, the fisheries declines in the
marine environment are being exacerbated by long-term declines in
upwelling intensities and increased sea surface temperatures. These
changes have hampered the recovery of sardine and anchovy populations
in the region even as fishing pressure on those species has been
relaxed, forcing penguins to shift to a less nutritious prey, the
pelagic goby. The changes have also forced a regime shift in the
Benguela ecosystem to other fish species, which are not the prey of
African penguins. The phenomenon of sulfide eruption has further
hampered the recovery of the food base.
In the Western Cape, in addition to the severe fisheries declines
and severe reduction of the carrying capacity of the marine
environment, the primary food source of African penguins has, beginning
in 1997, shifted consistently eastward to areas east of the
southernmost tip of South Africa. Over the past decade, the primary
food base for the most populous African penguin colonies in South
Africa has shifted outside the accessible foraging range for those
colonies. This shift has led to declines in penguin recruitment and
significant decreases in adult survival and represents an additional
significant immediate threat to the West Cape populations of the
African penguin.
On land, the historical effects of guano removal from penguin
breeding islands continue to be felt in lack of predator protection and
heat stress in breeding birds. Predation on penguins by Cape fur seals
and kelp gulls has become a predominant threat factor. In Namibia,
where African penguin numbers are lowest, with only 3,402 pairs, low-
lying islands have experienced flooding from increased rainfall and
rising sea-levels, threatening 10 percent of the nests in the four
major breeding colonies, further stressing a species under severe
immediate threat from factors in the marine environment.
Finally, the marine and coastal habitat of the African penguin lies
on one of the world's busiest sea lanes. Despite improvements in oil
spill response capability and global recognition of the importance of
protecting these waters from the impacts of oil, catastrophic and
chronic spills have been and continue to be the norm. The most recent
catastrophic spill in 2000 in South Africa resulted in the oiling of
19,000 penguins and the translocation of 19,500 more birds in direct
danger from the spill. With the global population at a historical low
(between 31,000 and 32,000 pairs), future oil spills, which consistent
experience shows may occur at any time, pose a significant and
immediate threat to the species throughout all of its range.
Conclusion and Determination for the African Penguin
We have carefully assessed the best scientific and commercial
information available regarding the threats faced by this species. The
African penguin is in serious decline throughout all of its range, and
the decline is currently accelerating. This decline is due to threats
of a high magnitude--(1) The immediate impacts of a reduced carrying
capacity for the African penguin throughout its range due to food base
declines and competition for food with Cape fur seals (severely
exacerbated by rapid ongoing ecosystem changes in the marine
environment at the northern end of the penguin's distribution and by
major shifts of prey resources to outside of the accessible foraging
range of breeding penguins at the southern end of distribution); (2)
the continued threats to African penguins on land throughout their
range from habitat modification and destruction, facilitating
predation; and (3) the immediate and ongoing threat of oil spills and
oil pollution to the African penguin. The severity of these threats to
the African penguin within its breeding and foraging range puts the
species in danger of extinction. Therefore, we find that the African
penguin is in danger of extinction throughout all of its range.
Available Conservation Measures
Conservation measures provided to species listed as endangered or
threatened under the Act include recognition, requirements for Federal
protection, and prohibitions against certain practices. Recognition
through listing results in public awareness, and encourages and results
in conservation actions by Federal governments, private agencies and
groups, and individuals.
Section 7(a) of the Act, as amended, and as implemented by
regulations at 50 CFR part 402, requires Federal agencies to evaluate
their actions within the United States or on the high seas with respect
to any species that is proposed or listed as endangered or threatened,
and with respect to its critical habitat, if any is being designated.
However, given that the African penguin is not native to the United
States, critical habitat is not being designated for this species under
section 4 of the Act.
Section 8(a) of the Act authorizes limited financial assistance for
the development and management of programs that the Secretary of the
Interior determines to be necessary or useful for the conservation of
endangered and threatened species in foreign countries. Sections 8(b)
and 8(c) of the Act authorize the Secretary to
[[Page 59656]]
encourage conservation programs for foreign endangered species and to
provide assistance for such programs in the form of personnel and the
training of personnel.
The Act and its implementing regulations set forth a series of
general prohibitions and exceptions that apply to all endangered and
threatened wildlife. As such, these prohibitions would be applicable to
the African penguin. These prohibitions, under 50 CFR 17.21, make it
illegal for any person subject to the jurisdiction of the United States
to ``take'' (take includes harass, harm, pursue, hunt, shoot, wound,
kill, trap, capture, collect, or to attempt any of these) within the
United States or upon the high seas, import or export, deliver,
receive, carry, transport, or ship in interstate or foreign commerce in
the course of a commercial activity, or to sell or offer for sale in
interstate or foreign commerce, any endangered wildlife species. It
also is illegal to possess, sell, deliver, carry, transport, or ship
any such wildlife that has been taken in violation of the Act. Certain
exceptions apply to agents of the Service and State conservation
agencies.
We may issue permits to carry out otherwise prohibited activities
involving endangered and threatened wildlife species under certain
circumstances. Regulations governing permits are codified at 50 CFR
17.22 for endangered species, and at 17.32 for threatened species. With
regard to endangered wildlife, a permit must be issued for the
following purposes: for scientific purposes, to enhance the propagation
or survival of the species, and for incidental take in connection with
otherwise lawful activities.
Required Determinations
National Environmental Policy Act (NEPA)
We have determined that environmental assessments and environmental
impact statements, as defined under the authority of the National
Environmental Policy Act of 1969 (42 U.S.C. 4321 et seq.), need not be
prepared in connection with regulations adopted under section 4(a) of
the Act. We published a notice outlining our reasons for this
determination in the Federal Register on October 25, 1983 (48 FR
49244).
References Cited
A complete list of all references cited in this final rule is
available on the Internet at http://www.regulations.gov or upon request
from the Endangered Species Program, U.S. Fish and Wildlife Service
(see the FOR FURTHER INFORMATION CONTACT section).
Author
The primary author of this final rule is staff of the Branch of
Foreign Species, Endangered Species Program, U.S. Fish and Wildlife
Service, 4401 N. Fairfax Drive, Arlington, Virginia 22203.
List of Subjects in 50 CFR Part 17
Endangered and threatened species, Exports, Imports, Reporting and
recordkeeping requirements, Transportation.
Regulation Promulgation
0
Accordingly, we amend part 17, subchapter B of chapter I, title 50 of
the Code of Federal Regulations, as set forth below:
PART 17--[AMENDED]
0
1. The authority citation for part 17 continues to read as follows:
Authority: 16 U.S.C. 1361-1407; 16 U.S.C. 1531-1544; 16 U.S.C.
4201-4245; Pub. L. 99-625, 100 Stat. 3500; unless otherwise noted.
0
2. Amend Sec. 17.11(h) by adding a new entry for ``Penguin, African,''
in alphabetical order under BIRDS to the List of Endangered and
Threatened Wildlife to read as follows:
Sec. 17.11 Endangered and threatened wildlife.
* * * * *
(h) * * *
--------------------------------------------------------------------------------------------------------------------------------------------------------
Species Vertebrate
------------------------------------------------------ population where Critical Special
Historic range endangered or Status When listed habitat rules
Common name Scientific name threatened
--------------------------------------------------------------------------------------------------------------------------------------------------------
* * * * * * *
Birds
* * * * * * *
Penguin, African................ Spheniscus demersus Atlantic Ocean-- Entire............. E 775 NA NA
South Africa,
Namibia.
* * * * * * *
--------------------------------------------------------------------------------------------------------------------------------------------------------
* * * * *
Dated: September 9, 2010.
Paul R. Schmidt,
Acting Director, U.S. Fish and Wildlife Service.
[FR Doc. 2010-24338 Filed 9-27-10; 8:45 am]
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