Use of otolith chemistry and radiotelemetry to determine age-specific migratory patterns of anadromous bull trout in the Hoh River, Washington
Brenkman SJ and Corbett SC. 2007. Use of otolith chemistry and radiotelemetry to determine age-specific migratory patterns of anadromous bull trout in the Hoh River, Washington. Transactions of the American Fisheries Society. 136(1):1-11
From the Abstract: "The complementary use of otolith chemistry and radiotelemetry demonstrates that bull trout Salvelinus confluentus from the Hoh River, Washington, exhibit considerable life history variability. Adult bull trout lived exclusively in the river, inhabited freshwater for prolonged periods and later became anadromous, or were anadromous and made multiple migrations between freshwater and salt water. Twenty of 40 radio-tagged juvenile bull trout emigrated to the ocean at lengths ranging from 243 to 360 mm (mean 287), which is the first published verification of anadromy at this life history stage. Otolith chemistry analyses of 105 bull trout that were incidentally killed in commercial gill-net fisheries revealed that 85% had migrated from freshwater to the sea at least once and that 75% had migrated multiple times."
- Type
- Journal Article
- Authors
- Brenkman, Samuel; Corbett, Stephen
- Units
- OLYM
- Keywords
- Anadromous Fish, Animal Studies, Bull Trout (Salvelinus confluentus), Hoh River Watershed, otolith chemistry, Radio Telemetry