Recruitment of Young-of-Year Largemouth Bass in Relation to Size Structure of Parental Stock
- 1 January 1987
- journal article
- Published by Oxford University Press (OUP) in North American Journal of Fisheries Management
- Vol. 7 (1) , 131-137
- https://doi.org/10.1577/1548-8659(1987)7<131:roylbi>2.0.co;2
Abstract
The proportion of body weight contributed by the ovaries - the maturity index - was used to examine the relation between time of spawning and size of the parents for largemouth bass (Micropterus salmoides) in two Mississippi reservoirs. The maturity index increased before the fish spawned, reached a maximum, and then decreased as eggs were released. The maximum was interpreted as occurring at the onset of spawning. A plot of maturity index against time, according to size group, indicated that the larger fish attained a higher index and spawned first. This relationship was formulated with a multiple-regression model. The model, complemented with estimates of stock fecundity, larval growth, and mortality, was applied to populations exemplifying either few or numerous large brood fish to simulate the size distribution of young-of-year largemouth bass by late spring. These simulations indicated that populations with larger brood fish would produce bigger young-of-year largemouth bass by late spring a...Keywords
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