WRS-83
Two Techniques for Locating and Sampling Brown Trout
Microhabitat Under Complete Ice Cover
Abstract
Two techniques for locating and sampling instream brown trout
microhabitat under complete ice cover conditions were devised,
conducted and evaluated. Results indicate that radio telemetry by
means of implanted transmitters is a superior technique over implantation
of radioisotope capsules for tracking under-ice movements and
locating microhabitat locations. The major drawback with transmitters
was battery failure. Winter microhabitat preferences of brown trout
were tentatively defined for resting and cover in terms of water
depth, water velocity and substrate type.
Key Words
Instream flow, brown trout, microhabitat, radio telemetry,
radioisotope, winter habitat requirements, fish tracking, ice
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