Alabama Bass Alter Reservoir Black Bass Species Assemblages When Introduced Outside Their Native Range
Black bass Micropterus spp. stocked outside of their native range have often been implicated in declines of native fishes, but impacts of these stockings on native congeners have been examined less commonly and almost never in reservoirs. Relative abundance and creel data were obtained from seven re...
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Veröffentlicht in: | North American journal of fisheries management 2023-04, Vol.43 (2), p.384-399 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | Black bass Micropterus spp. stocked outside of their native range have often been implicated in declines of native fishes, but impacts of these stockings on native congeners have been examined less commonly and almost never in reservoirs. Relative abundance and creel data were obtained from seven reservoirs (632–13,156 ha) in four southeastern states where Alabama Bass M. henshalli had been illegally stocked. Genetics data for black bass were collected in nine more reservoirs in five southeastern states where similar introductions occurred. In each case, Alabama Bass introduction was swiftly followed by sweeping changes in the black bass composition. Largemouth Bass M. salmoides relative abundance declined by 42–77% after Alabama Bass introduction in four of five reservoirs, but total black bass relative abundance was unchanged in three of them, indicating that Alabama Bass essentially replaced Largemouth Bass. Alabama Bass or their hybrids dominated the black bass genetic sample in five of nine reservoirs, and pure specimens of non‐Alabama Bass species composed |
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ISSN: | 0275-5947 1548-8675 |
DOI: | 10.1002/nafm.10876 |