Journal Article
Rainbow smelt ( Osmerus mordax ) influence on walleye ( Sander vitreus ) recruitment decline: mt DNA evidence supporting the predation hypothesis
Jesse M. Lepak; Adam G. Hansen; Erik T. Cristan; Demetra A. Williams; William M. Pate
Journal of Fish Biology · Vol. 103, Issue 6 · pp. 1543-1548 · 2023
Abstract
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.
Bibliographic Information
| Journal | Journal of Fish Biology |
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| Publisher | Wiley |
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| Publication Date | 2023-12-01 |
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| Publication Year | 2023 |
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| Volume | 103 |
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| Issue | 6 |
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| Pages | 1543-1548 |
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| Document Type | Journal Article |
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| Print ISSN | 0022-1112 |
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| eISSN | 1095-8649 |
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| DOI | 10.1111/jfb.15523 |
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| Subject | General Aquaculture, Fisheries & Fish Science |
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