Introgression of the Florida Largemouth Bass Genome into Native Populations in Alabama Public Lakes
- 1 August 1992
- journal article
- Published by Oxford University Press (OUP) in North American Journal of Fisheries Management
- Vol. 12 (3) , 494-498
- https://doi.org/10.1577/1548-8675(1992)012<0494:iotflb>2.3.co;2
Abstract
Many public fishing lakes constructed in Alabama first contained the state's native largemouth bass Micropterus salmoides, which has allozyme frequencies similar to those of the pure northern subspecies, M. s. salmoides. Many of these lakes then were supplementally stocked with largemouth bass fingerlings with allozyme frequencies similar to those of the Florida subspecies M. s. floridanus. The supplemental introductions had varying success, and 10 of 11 populations we examined had undergone significant (P < 0.05) allele-frequency changes–representing introgression of Florida alleles-at the diagnostic loci sAAT-B*, sIDHP*, and sSOD*. We evaluated several variables for their effects on introgression: number of years (6–18) since initial stockings of Florida largemouth bass, number of stockings (3–11), stocking densities (334–1,430/hectare), Secchi disk visibility (18–33 cm), and latitude (31°30'–34°90'N). All variables except latitude affected or were correlated with percent introgression, which r...Keywords
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