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Experimental evaluation of a minnow trap for small lotic fish
Authors:Joseph M. Culp  Nancy E. Glozier
Affiliation:(1) Division of Ecology (Aquatic Ecology Group), Department of Biological Sciences, University of Calgary, T2N 1N4 Calgary, Alberta, Canada
Abstract:A minnow trap that operates in various flow regimes in streams and allows sampling of small fish from stream bed microhabitats was developed. In laboratory and field tests, the most efficient trap design for capturing and retaining various species of fish had one funnel oriented downstream, a plexiglass body, and commercial trout food as bait. These lightweight traps can be set in a wide range of current velocities and depths, and can be useful in investigations that examine the microhabitat use, diel activity patterns or population densities of small lotic fish. Guidelines for the trap's use and for quick verification of capture success in new situations are suggested.
Keywords:fish  minnow  sampling  stream  technique  trap
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