Energy expenditure during breeding competition between feral Chinook salmon (Oncorphynchus tshawytscha) and native Atlantic salmon (Salmo salar) ...

• Main Author: Lobsinger, Charlene
• Format: Text
• Language: English
• Published: University of British Columbia 2009
• Subjects: Atlantic salmon; Salmo salar
• Online Access: https://dx.doi.org/10.14288/1.0091578; https://doi.library.ubc.ca/10.14288/1.0091578

The introduction of non-native species to many parts of the world is increasing and continues to be a major concern amongst scientists. My objective was to examine competition for space and other resources between native and introduced salmonids. Through physiological telemetry and behavioural observation, the movements, energy expenditure, and interactions within and between spawning feral Chinook salmon and released native Atlantic salmon were measured in Bronte Creek, a tributary of Lake Ontario. By combining telemetry and visual observations, the frequency, duration, and energy cost of all behaviours (including routine behaviours) were determined. The data were used to construct an energy budget for each species, to identify additional energy costs due to interspecific interactions, and the degree to which the added cost may influence reproductive success for both species. Chinook salmon were observed to be dominant to Atlantic salmon on the spawning grounds and had the highest average daily energy ...