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Experiments with Various Rates of Stocking Bluegills, Lepomis Macrochirus Rafinesque, and Largemouth Bass, Micropterus Salmoides (Lacépède), in Ponds
Author(s) -
Swingle H. S.
Publication year - 1951
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(1950)80[218:ewvros]2.0.co;2
Subject(s) - micropterus , stocking , bass (fish) , fishery , biology , acre , lepomis macrochirus , minnow , electrofishing , zoology , fish <actinopterygii> , agronomy
Results from stocking adult bluegills and largemouth bass, fingerling bass and adult bluegills, and fingerling bluegills and fingerling largemouth bass are compared. Increase in rates of stocking bluegills from 8 to 1,500 per acre in bluegill‐bass combinations gave corresponding increases in pounds of harvestable fish per acre and corresponding decreases in the cost per pound. The calculated A T value (percentage harvestable fish) could be used to predict the success of various stocking rates. Unbalanced populations resulted from stocking with insufficient numbers of either largemouth bass or bluegills. When normally adequate numbers of each species were stocked, unbalanced populations occasionally resulted from extremely high mortality among the stocked fish. Where no fish were removed by fishing, an average of 25.6 percent of the stocked bass died during the first 6 months and an additional 20.4 percent during the following year; similarly an average of 15.4 percent of the stocked bluegills died during the first year and an additional 19.1 percent during the second year.