Catch and Mortality of Non-Target Species in Lake Whitefish Trap Nets in MichiganWaters of Lake Superior

摘要

Trap nets have been promoted as an efficient means for harvesting lake whitefishCoregonus clupeaformis in the Great Lakes while limiting mortality to other (non-targeted) species. All state-licensed fisheries for lake whitefish in Michigan waters of Lake Superior use trap nets. During 1983-1989, these fisheries were sampled annually to estimate catch and mortality of non-target species. The samples represented 9% of the total trap-net effort by these fisheries. Non-targert fishes killed annually by state-licensed trap nets in Michigan waters of Lake Superior, with mean annual catch in parentheses, were estimated.