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Contribution of Native and Stocked Walleye Fingerlings to the Anglersˈ Catch, Escanaba Lake, Wisconsin
Author(s) -
Kempinger James J.,
Churchill Warren S.
Publication year - 1972
Publication title -
transactions of the american fisheries society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.696
H-Index - 86
eISSN - 1548-8659
pISSN - 0002-8487
DOI - 10.1577/1548-8659(1972)101<644:conasw>2.0.co;2
Subject(s) - stocking , fishery , fishing , yield (engineering) , population , electrofishing , geography , abundance (ecology) , biology , demography , materials science , sociology , metallurgy
Abundance and yield for various year classes of a landlocked walleye population was studied in a northern Wisconsin Lake. The size of individual year classes varies greatly and is determined during the first summer. The number of fingerling surviving in the fall is an indication of the future role of a year class in the fishery. Yield to the angler of a particular year class over its lifetime depends on the fishing pressure but may not be directly proportional. In Escanaba Lake, as high as 25% of the fingerling surviving in the fall may be harvested by anglers during the life of the year class. Four experimental stockings of marked fingerling walleye were traced through the creel census of which only one of the four added significantly to the harvest. The yield of the successful stocking was 13%. In three of the stocked year classes, the yield was less than 1% of the number stocked.