Evaluation of a boat-mounted electro-trawl as a commercial harvesting system for crawfish |
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| Authors: | CDean Cain James W Avault |
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| Institution: | School of Forestry and Wildlife Management, Louisiana Agricultural Experiment Station, Louisiana State University Agricultural Center, Baton Rouge, Louisiana 70803, USA |
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| Abstract: | Field experiments were conducted to ascertain if trawling utilizing electrical currents was an effective method of harvesting crawfish.Results suggest that catch efficiency relative to vegetation density is more dependent upon trawl mechanical ability than on relative crawfish abundance. Catch is also dependent upon trawling speed, water depth and time of trawling. Trawling consistently yielded higher catches per area than did conventional traps. Unmarketable individuals and mortality were no different for the two gear types.Trawling could be an effective supplemental harvesting method, but additional work needs to be performed to alleviate electrical and mechanical problems before economic efficiency can be realistic. |
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