Pink Mucket

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Pink Mucket (Lampsilis abrupta)
Status: Endangered
June 14, 1976

For questions regarding the Pink Mucket, please contact Chris Davidson at chris_davidson@fws.gov or 501-513-4481.

Species Facts:
The pink mucket is a yellow-brown mussel with a rounded, thick and inflated smooth shell. This mussel can grow to an adult length of 3 to 5 inches and can live up to 50 years.

The pink mucket's reproductive cycle is similar to other species of freshwater mussels. The female uses a spotted mantle flap to lure in specific host fish; host fish for the pink mucket include the largemouth bass and walleye. When a host fish draws near, the female pink mucket releases tiny parasitic glochidia (larvae) that latch onto its gills and then drop off later as juvenile mussels. The pink mucket spawns August to September, and releases glochidia the following June.

Habitat Summary:
The pink mucket is found in mud and sand and in shallow riffles and shoals swept free of silt in major rivers and tributaries.

Why is it Endangered?
Dams, reservoirs, and impoundments have flooded much of this mussel's habitat, and contributed directly to the extirpation of pink mucket populations in some streams and resulted in the highly fragmented habitat and isolated populations currently seen in the species. Large dams also affect the flow and water quality downstream (reduced temperature, oxygen, and flow, and bank and substrate instability and erosion), which continues to negatively affects pink mucket populations.

As with other mussels, pink mucket are also sensitive to water quality and sediment. The pink mucket was also one of the mussels in Arkansas that was commercially harvested for use in the button and pearl industry.

Pink mucket have been propegated in captivity, and are one of the most readily cultured North American mussel species. As a result, population augmentation and reintroductions have occured or are planned throughout the range of this species.

Recently, over 1000 captive-grown pink muckets were released in the Saline River in Arkansas. Indviduals are lazer-etched with an unique identification number (picture at right) to track survival and movement.

Range in Arkansas:
The Saline River in Arkansas harbors one of the longest contiguous reaches of occupied habitat rangewide and contains the best pink mucket population west of the Mississippi River.

Arkansas Field Office
110 S. Amity Road
Suite 300
Conway, AR 72032

501/513 4470 (v)
501/513 4480 (f)

Last Updated: December 30, 2015

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