Media Tip Sheet
Midwest Region

Mass Marking in the Great Lakes

Tag along with the traveling taggers to see how Federal and State hatcheries are working together to gather valuable data to preserve our Great lakes fisheries! The Service's Fisheries Program used two automated tagging trailers to carry out its newly coordinated mass- marking program to code-wire tag and mark (finclip) state and federal hatchery fish in the Great Lakes. This technique has been successfully used in the Northwest for marking hatchery-reared Pacific salmon, and is known as "mass-marking" since millions of fish are rapidly tagged and marked each year.

The mass marking season begins in March and wraps up in November. By the numbers in 2010:
750,000 Chinook salmon at Platte River State Fish Hatchery in Michigan
360,000 Chinook salmon at Wild Rose State Fish Hatchery in Wisconsin
1.9 Million Lake trout at Jordan River National Fish Hatchery
1.1 million Lake trout at Pendills Creek National Fish Hatchery
1.6 million Lake trout at Iron River National Fish Hatchery

Full size images can be downloaded from Flickr


Last updated: April 4, 2013