Hybridization between Introduced Spotted Bass and Smallmouth Bass in Reservoirs
作者:
PatrickC. Pierce,
MichaelJ. Van Den Avyle,
期刊:
Transactions of the American Fisheries Society
(Taylor Available online 1997)
卷期:
Volume 126,
issue 6
页码: 939-947
ISSN:0002-8487
年代: 1997
DOI:10.1577/1548-8659(1997)126<0939:HBISBA>2.3.CO;2
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
Introductions of black bassesMicropterusspp. beyond their native ranges have led to hybridization within the genus. In the southeastern USA, the potential for hybridization appears high because species introductions have been common in reservoirs. We determined the extent of hybridization between smallmouth bassM. dolomieuand spotted bassM. punctulatusin reservoirs in which introductions of either species into the native range of the other species had occurred. Three allozyme loci were used to distinguish the two species and their hybrids. Significant hybridization occurred in two of three reservoirs where introductions had been reported. In Lake Chatuge, Georgia–North Carolina, where the Alabama subspecies of spotted bassM. p. henshalliwas introduced, 77 of 276 fish had hybrid genotypes, and only 2 fish had genotypes of the native smallmouth bass. In Thurlow Reservoir, Alabama, where smallmouth bass were introduced and Alabama spotted bass were native, 3 of 17 fish had hybrid genotypes. Only I fish with a possible hybrid genotype was identified in two reservoirs containing native smallmouth bass and northern spotted bassM. p. punctulatus.
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