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Description: |
15 pages : illustrations ; 27 cm. |
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General Note: |
With: Technical papers 19-22. |
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Bibliography Note: |
Includes bibliographical references (page 15). |
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Summary, Etc. Note: |
Abstract: Catches by gill nets, frame nets, trap nets, 4.0 and 8,2 meter otter trawls, seines, and a 220-volt electroshocker, from 1962 to 1964, were compared to determine practical methods for annual measuring of the fish populations in Lewis and Clark Lake. Analyses of catch-effort data indicated that seines and 8.2-meter trawls were most efficient for sampling young-of-the-year, and trap and gill nets were most efficient for sampling older fish. |