Evaluation of Minimum-Size Limits and Reduced Daily Limits on the Crappie Populations and Fisheries in Five Large Missouri Reservoirs
- 1 November 1991
- journal article
- Published by Oxford University Press (OUP) in North American Journal of Fisheries Management
- Vol. 11 (4) , 585-597
- https://doi.org/10.1577/1548-8675(1991)011<0585:eomsla>2.3.co;2
Abstract
Populations of white crappies Pomoxis annularis were studied at five Missouri reservoirs to evaluate the effects of minimum-size regulations and reduced daily limits. Models of equilibrium yield per recruit indicated that regulations that reduced or eliminated the harvest of age-1 and age-2 fish resulted in harvest of fewer fish but increased yield to the fishery. Peak yield occurred when white crappies were first harvested at age 3. After restrictive regulations were imposed, a significantly greater proportion of the harvest shifted to age-3 and older fish at Pomme de Terre (15-daily limit), Wappapello (10-daily limit), Stockton (10-in size limit), and the James River Arm of Table Rock (10-in size limit), but not at Lake of the Ozarks (15-daily limit). Although mean lengths of harvested white crappies were highly variable, they increased more in reservoirs with minimum-size limits. The greatest increase was in the James River Arm, where the mean length increased from about 7 to 11 in after impos...Keywords
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