Rainbow smelt (Osmerus mordax) influence on walleye (Sander vitreus) recruitment decline: mtDNA evidence supporting the predation hypothesis.

Autor: Lepak JM; Colorado Parks and Wildlife, Aquatic Research Section, Fort Collins, Colorado, USA., Hansen AG; Colorado Parks and Wildlife, Aquatic Research Section, Fort Collins, Colorado, USA., Cristan ET; Colorado Parks and Wildlife, Aquatic Research Section, Fort Collins, Colorado, USA., Williams DA; Colorado Parks and Wildlife, Aquatic Research Section, Fort Collins, Colorado, USA., Pate WM; Colorado Parks and Wildlife, Aquatic Research Section, Fort Collins, Colorado, USA.
Jazyk: angličtina
Zdroj: Journal of fish biology [J Fish Biol] 2023 Dec; Vol. 103 (6), pp. 1543-1548. Date of Electronic Publication: 2023 Aug 31.
DOI: 10.1111/jfb.15523
Abstrakt: Rainbow smelt (Osmerus mordax) have been introduced widely but are associated with declines in walleye (Sander vitreus) recruitment. A primary hypothesis for these declines is that O. mordax consume larval S. vitreus. We confirmed overlapping spatial-temporal distributions of larval S. vitreus and O. mordax in our study system and used mtDNA analyses to determine if O. mordax stomach contents contained S. vitreus. Approximately 20% of O. mordax composite stomach samples were considered positive for S. vitreus consumption. These findings support the predation hypothesis and have S. vitreus management/stocking implications.
(© 2023 The Authors. Journal of Fish Biology published by John Wiley & Sons Ltd on behalf of Fisheries Society of the British Isles.)
Databáze: MEDLINE
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