David A. Patterson

TL;DR: It is shown that cardiorespiratory physiology varies at the population level among Fraser River sockeye salmon and relates to historical environmental conditions encountered while migrating, and thermal optima for aerobic, cardiac, and heart rate scopes are consistent with the historic river temperature ranges for each population.

TL;DR: It is suggested that collapse of aerobic scope was an important mechanism to explain the high salmon mortality observed during their migration and models based on thermal optima for aerobic scope for ectothermic animals should improve predictions of population fitness under future climate scenarios.

TL;DR: This review synthesizes the sublethal physiological and behavioural consequences of cold-shock stress on fishes, identifies natural and anthropogenic sources ofcold shock, discusses the benefits of cold shock to fisheries science and describes mitigation and management efforts.

TL;DR: For example, Kent et al. as discussed by the authors intercepted 100 Fraser River sockeye during normal migration near a spawning stream and measured somatic energy and aspects of plasma biochemistry for 24 days.

TL;DR: Since 1995, several stocks of Fraser River sockeye salmon have begun upriver spawning migrations significantly earlier than previously observed, with high levels of en route and pre-spawning mortality, occasionally exceeding 90%.