Changes in the long-term distribution of commercially caught Cowichan chinook
Nottingham, Melissa Katherine
MetadataShow full item record
The Cowichan River, British Columbia (BC), Canada stock of Chinook Salmon (Oncorhynchus tshawytscha) is used federally in Canada, as an escapement indicator of the Lower Georgia Strait (BC) Chinook and as such is important both locally and internationally as part of the Pacific Salmon Treaty. The study examines the changes in distribution of catch of Cowichan hatchery Chinook from 1977-2011, using coded wire data. Regression analysis of SST and percentage of total catch when looked at by regime revealed different strengths of correlation for different areas. Statistically significant results occurred more often in the highly productive Regime 1 (1977-1988) for the west coast of Vancouver Island. SST one year prior to catch showed correlations to catch distribution more frequently than when compared to SST at brood year, sea entry year, or catch year. These population specific results can be compared to other populations to help tailor decisions around changing population dynamics in order to best manage stock-specific fisheries.
Showing items related by title, author, creator and subject.
Iftikar, Fathima I.; MacDonald, Julia R.; Baker, Daniel W.; Renshaw, Gillian M.C.; Hickey, Anthony J.R. (The Company of Biologists, 2014-07)For many aquatic species, the upper thermal limit (Tmax) and the heart failure temperature (THF) are only a few degrees away from the species' current environmental temperatures. While the mechanisms mediating temperature-induced ...
Background groundwater concentrations of dissolved selenium in the Kamloops, BC Area - characterization, spatial distribution, and management Carswell, Kelly (2016-06-15)This study explores regional background groundwater concentrations of selenium in the Kamloops area, based on recent groundwater quality data collated as part of provincial contaminated site investigations, and determines ...
Distributed leadership and the leader: designing a professional development course for private school principals of Calcutta, India Kaur, Kuljit (Electronic version published by Vancouver Island University, 2016)This research project was prepared to explore the role of a leader in distributed leadership setting with an intention to prepare a Professional Development Course for principals of private schools of Calcutta. The course ...