Biologging in combination with biotelemetry reveals behavior of atlantic salmon following exposure to capture and handling stressors
Canadian Journal of Fisheries and Aquatic Sciences , Volume 76 - Issue 12 p. 2176- 2183
We investigated the response of Atlantic salmon (Salmo salar) to capture and handling stressors by analyzing fine-scale locomotor activity using accelerometer data loggers and broader-scale movements by tracking migration with radiotelemetry. Half the sample population was exposed to experimental exercise and air exposure and released with a control group to simulate fisheries handling. All but two of the surviving fish (both in the treatment group) returned to the counting fence to resume the 2016 spawning migration (survival = 86%–91%). There were no differences in postrelease locomotor activity, measured by an index of total body action (jerk), between control and treatment salmon (p = 0.81). Comparison of mean time to return to the counting fence against a null model revealed that treatment salmon were significantly delayed in returning to the counting fence (p < 0.01), whereas control fish were not (p = 0.24). Both the abiotic environment and human interactions influenced locomotor activity of the migratory fish and synchrony of the migration with untreated conspecifics.
|Canadian Journal of Fisheries and Aquatic Sciences|
|Organisation||Department of Biology|
Lennox, R.J. (Robert J.), Chapman, J.M. (Jacqueline M.), Twardek, W.M. (William M.), Broell, F. (Franziska), Bøe, K. (Kristin), Whoriskey, F.G. (Frederick G.), … Cooke, S.J. (2019). Biologging in combination with biotelemetry reveals behavior of atlantic salmon following exposure to capture and handling stressors. Canadian Journal of Fisheries and Aquatic Sciences, 76(12), 2176–2183. doi:10.1139/cjfas-2018-0477