From the 1999 Southern Division of the American Fisheries Society Midyear Meeting held in Chattanooga, Tennessee.

Effects of Electrofishing on Catch Efficiency and Injury Rates of Warmwater Fishes

C.R. Dolan and L.E. Miranda, Mississippi Cooperative Fish and Wildlife Research Unit, P.O. Box 9691, Mississippi State, Mississippi 39762; Voice 601-325-3217 FAX 601-325-8726 E-Mail cdolan@magnolia.cfr.msstate.edu or smiranda@cfr.mstate.edu

Keywords: applicability, efficiency, electrofishing, injury, warmwater fishes


Electrofishing is an efficient, frequently used method to sample freshwater fishes in littoral areas of aquatic systems. Fish exposed to electroshock may experience adverse effects such as physiological and behavioral changes, and physical injury. The effect of electrofishing on catch efficiency and injury to fish has been well studied by fish biologists. However, the majority of electrofishing research has focused on salmonids or other coolwater species. Little attention has been given to the incidence of injury in warmwater communities. Also, many studies were not adequate because data collection was designed for other purposes, and comparisons are difficult due to differing gears, techniques, environmental conditions, and fish species. The objectives of this study include the determination of the extent of injuries in warmwater fishes, and the identification of electrofishing procedures that will result in efficient sampling but minimal injury to fish. Experimentation will be performed on bluegill Lepomis macrochirus, channel catfish Ictalurus punctatus, and largemouth bass Micropterus salmoides, fish often targeted with electrofishing. As electrofishing is common practice among those involved in fisheries research, the results of this study will be applicable nationwide. We report findings obtained during the first six months of our research.


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