Líffræðifélag Íslands - biologia.is
Líffræðiráðstefnan 2021
Erindi/veggspjald / Talk/poster E11
Höfundar / Authors: James P. Losee (1), Andrew Claiborne (1), Derek Dapp (1), Riley Freeman(1), Gabe Madel (1), Todd Seamons(1), Rob Allan (1), Anna Kagley (2), Jessica Miller (3), Tom Quinn (4), Gustav Hellström (5), Daniel Palm (5), Fia Finn (6)
Starfsvettvangur / Affiliations: 1. Washington Department of Fish and Wildlife, 2. National Oceanic and Atmospheric Administration, 3. Oregon State University, 4. University of Washington, 5. Swedish University of Agricultural Sciences, 6. University of Iceland
Kynnir / Presenter: James P. Losee
Anadromous Cutthroat Trout inhabit coastal marine waters in the United States from northern California to south-central Alaska but their movement patterns, timing of spawning and seaward migration, and ocean ecology are less well known than other species of Oncorhynchus. To improve understanding of anadromous Coastal Cutthroat Trout, researchers began a multidisciplinary project to identify and fill data gaps associated with this species. PIT, acoustic, genetic and visible elastomer tags, scale analysis, and otolith microchemistry were combined with spawning ground surveys in Puget Sound, Washington to provide important insights into the biology of this species in Puget Sound. The majority of these “sea-run” Cutthroat Trout were produced by anadromous mothers, the juveniles entered marine waters at age 2, exhibited high site fidelity to nearshore beaches as juveniles and adults, and returned to natal tributaries in the spring (February through May) to spawn. In addition, we identified cutthroat trout as a new host for a marine parasitic argulid. Information regarding growth rates, migration distances, genetic stock structure marine survival, fine scale tracking and comparisons with anadromous brown trout (sea trout) in European waters will be discussed further. Together, this information provides fisheries managers with improved tools to maintain healthy populations of anadromous Cutthroat Trout across their range and may provide insight for those researching large bodied salmonids that migrate to remote, offshore feeding areas that are more difficult to monitor.