Fish and Aquatic Conservation



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Monitoring fish populations is the essence of the work conducted by Fish and Wildlife Conservation Offices. To make fish management decisions, scientists must understand past trends and current conditions to prescribe actions for the future.


Asian Carp   divider Lahontan cutthroat trout   divider assisting tribes and refuges with fisheries conservation

Asian carp are among the most unwanted invasive species in the America. Biologists as the Carterville Fish and Wildlife Conservation Office in Illinois are on the front lines attempting to stave off an invasion of the fish into the Great Lakes. With the use of leading-edge sonar technology, personnel are able to gaze into the murky tributary waters on the lookout of the unwanted fish. 


The Lahontan cutthroat trout reaches a mammoth size—60+ pounds. Biologists with the Nevada Fishery Resources Office based in Reno frequently survey the Lake Tahoe ecosystem with an eye toward returning the trout to the lake where it was once the dominate species. Similar such efforts in nearby Fallen Leaf and Pyramid lakes have paid “huge” dividends.


Western native fishes are of paramount importance at the Lander Fish and Wildlife Conservation Office. Located in Lander, Wyoming, staff biologists assist tribes and national wildlife refuges in Wyoming with fisheries conservation, in particular monitoring populations of Yellowstone cutthroat trout, burbot, and sauger.

Last updated: September 10, 2015