Minimalist fish weir

Sometimes you don’t need a large, complex weir to count migrating fish, as is the case at Mahogany Creek in Humbold County, Nevada. With a Riverwatcher positioned in the center of a small, rigid weir the Summit Lake Paiute Tribe and U.S. Fish and Wildlife Service are able to enumerate Lahontan cutthroat trout (Oncorhynchus clarki henshawi) during their spawning migration up the creek from Summit Lake. Fisheries managers are monitoring these trout to determine whether the population will recover after 2,410 acres of the creek headwaters were fenced to exclude livestock. Sometimes the best solution is a simple one.

Photo source: FISHBIO