The influence of water temperature on sockeye salmon heart rate recovery following simulated fisheries interactions

Abstract

This study describes sockeye salmon heart rate recovery profiles after a fisheries catch-and-release simulation in 16°C, 19°C and 21°C water. Warmer temperatures increased the peak heart rate, scope for heart rate, factorial heart rate and the initial rate of energy expenditure, though the overall recovery duration was consistent across treatments.

Short‐term Physiological Response Profiles of Tagged Migrating Adult Sockeye Salmon: A Comparison of Gastric Insertion and External Tagging Methods

“…Further, the capacity for physiological recovery in Sockeye Salmon is directly influenced by water temperature (Prystay et al. ), which differed by ~5°C between the early and late sampling periods. Differences in initial physiologies across timing groups have been identified in other studies (Cooke et al.…”

“…Specifically, plasma sodium, potassium, glucose, and cortisol differed between periods suggesting that the absolute values of recovery profiles from salmon will change with maturity. Further, the capacity for physiological recovery in Sockeye Salmon is directly influenced by water temperature (Prystay et al 2017), which differed by~5°C between the early and late sampling periods. Differences in initial physiologies across timing groups have been identified in other studies (Cooke et al 2004;Crossin et al 2009).…”

Exploring the Relationship Between Physiological Performance and Reproductive Investment in Wild Fish Using Heart Rate Biologgers

“…Given the correlation between fH and metabolic rate, scientists have monitored fH to investigate the energetic costs of feeding Donaldson et al 2010), locomotion , predator prey interactions (Cooke et al 2003b), fisheries interactions (i.e., release or escapement after commercial bycatch (Raby et al 2015) or recreational catch-andrelease (Cooke et al 2003a;Prystay et al 2017), and temperature stress (Eliason et al 2011;Clark et al 2011) in fish.…”

“…Another reason for differences in recorded fH could be due to the fact that, with the exception of Clark et al 2009, previous studies that have focused on spawning-phase fish restricted individuals to an enclosure Clark et al 2010), whereas fish in the present study were free-swimming throughout the spawning channel. Nevertheless, the present study did require surgical procedures and fish handling, which typically requires hoursto-days for full recovery (Raby et al 2015;Prystay et al 2017). Although fish were given 24 hours to recover (restricted due to the nature of the project), the surgery could have still influenced reported fH values.…”

“…fH . As such, variations in fH has been successfully used in many salmonid studies to determine the physiological effects of temperature (Steinhausen et al 2008;Eliason et al 2011), fisheries interactions (Raby et al 2015;Prystay et al 2017), and feeding reviewed in Farrell et al 2009). Furthermore, Eliason et al (2013) demonstrated that energy acquisition and tolerance to stress is limited by the cardiovascular system in salmonids.…”