Predation by Northern Pikeminnow and Tiger Muskellunge on Juvenile Salmonids in a High‐Head Reservoir: Implications for Anadromous Fish Reintroductions
Autor: | David A. Beauchamp, Andrew C. Wilson, Erin D. Lowery, Kristin A. Connelly, Adam G. Hansen, Mark H. Sorel |
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Rok vydání: | 2016 |
Předmět: |
0106 biological sciences
Ptychocheilus education.field_of_study Fish migration biology 010604 marine biology & hydrobiology Population 04 agricultural and veterinary sciences Tiger muskellunge Aquatic Science Northern pikeminnow biology.organism_classification 01 natural sciences Predation Fishery 040102 fisheries 0401 agriculture forestry and fisheries education computer Ecology Evolution Behavior and Systematics Esox Pike computer.programming_language |
Zdroj: | Transactions of the American Fisheries Society. 145:521-536 |
ISSN: | 1548-8659 0002-8487 |
DOI: | 10.1080/00028487.2015.1131746 |
Popis: | The feasibility of reintroducing anadromous salmonids into reservoirs above high-head dams is affected by the suitability of the reservoir habitat for rearing and the interactions of the resident fish with introduced fish. We evaluated the predation risk to anadromous salmonids considered for reintroduction in Merwin Reservoir on the North Fork Lewis River in Washington State for two reservoir use-scenarios: year-round rearing and smolt migration. We characterized the role of the primary predators, Northern Pikeminnow Ptychocheilus oregonensis and tiger muskellunge (Northern Pike Esox lucius × Muskellunge E. masquinongy), by using stable isotopes and stomach content analysis, quantified seasonal, per capita predation using bioenergetics modeling, and evaluated the size and age structures of the populations. We then combined these inputs to estimate predation rates of size-structured population units. Northern Pikeminnow of FL ≥ 300 mm were highly cannibalistic and exhibited modest, seasonal, per c... |
Databáze: | OpenAIRE |
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