A Bioenergetics Simulation of the Potential Effects of Angler Harvest on Growth of Largemouth Bass in a Catch-and-Release Fishery

Autor:	F. Joseph Margraf, William A. Janowsky, William B. Perry
Rok vydání:	1995
Předmět:	education.field_of_study food.ingredient Ecology biology Population Fishing Foraging Micropterus Management Monitoring Policy and Law Aquatic Science biology.organism_classification Predation Fishery Bass (fish) food Black bass education Ecology Evolution Behavior and Systematics Catch and release
Zdroj:	North American Journal of Fisheries Management. 15:705-712
ISSN:	1548-8675 0275-5947
DOI:	10.1577/1548-8675(1995)015<0705:absotp>2.3.co;2
Popis:	Catch-and-release regulations in warmwater fisheries have the potential to limit growth and reduce the average size of harvestable fish as a result of density-dependent interactions. We assessed the effect of angler harvest on growth of largemouth bass Micropterus salmoides in Stonewall Jackson Lake where fishing for black bass Micropterus spp. was regulated with a no-harvest restriction. Using bioenergetic simulations, we estimated the amount of prey that would be made available for growth of remaining fish at harvest rates of 28.4 and 56.8% of the population. Simulation results indicated that consumption by age- 1 through age-6 largemouth bass in Stonewall Jackson Lake was 41 metric tons of forage in 1990. Juvenile largemouth bass (ages 1–3) consumed 57% of the forage eaten. Except for brief time periods for age-4 fish, foraging success for all age-classes of harvestable largemouth bass was relatively low; consumption rates were below 50% of maximum potential. Modeling showed that increasing fi...
Databáze:	OpenAIRE
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