Differences in Thermal Tolerance Among Sockeye Salmon Populations

  title={Differences in Thermal Tolerance Among Sockeye Salmon Populations},
  author={Erika J. Eliason and Timothy D. Clark and Merran J. Hague and Linda M. Hanson and Z. Gallagher and Ken M. Jeffries and Marika Kirstin Gale and David A. Patterson and Scott G. Hinch and Anthony P. Farrell},
  pages={109 - 112}
Environmental conditions encountered during migration shape cardiorespiratory physiology in sockeye salmon. Climate change–induced increases in summer water temperature have been associated with elevated mortality of adult sockeye salmon (Oncorhynchus nerka) during river migration. We show that cardiorespiratory physiology varies at the population level among Fraser River sockeye salmon and relates to historical environmental conditions encountered while migrating. Fish from populations with… 
Chum salmon migrating upriver adjust to environmental temperatures through metabolic compensation
The results indicate that chum salmon thermally accommodate through compensatory alterations in metabolic rates, implying that metabolic plasticity and/or the effect of genetic variance on plasticity might play a pivotal role in their thermal accommodation.
Atlantic salmon show capability for cardiac acclimation to warm temperatures.
It is shown that two wild populations of Atlantic salmon originating from northern and southern extremes of its European distribution have strikingly similar cardiac responses to acute warming when acclimated to common temperatures, despite different local environments.
High river temperature reduces survival of sockeye salmon (Oncorhynchus nerka) approaching spawning grounds and exacerbates female mortality
Female and male survival differed but only when they experienced warm river temperatures, and it is suspected that females could be immuno- compromised and thus less resistant to pathogens whose rates of development are accelerated by warm temperatures.
Provenance matters: thermal reaction norms for embryo survival among sockeye salmon Oncorhynchus nerka populations.
The differential inter-population variation in thermal tolerance that was observed suggests that the intergenerational effects of increasing water temperatures may affect populations differentially, and that such thermally mediated adaptive selection may drive population, and therefore species, persistence.
Intraspecific Differences in Thermal Biology among Inland Lake Trout Populations
A strong inverse relationship between early growth rate and temperature preference suggests that the differences in temperature preference in Lake Trout Salvelinus namaycush are population specific rather than ecotype specific.
Aerobic scope increases throughout an ecologically relevant temperature range in coho salmon
Coho salmon do not conform to existing predictions about the temperature dependence of aerobic scope in Pacific salmon, suggesting that when attempting to understand thermal optima for Pacific salmon and other species across life stages, AS is a useful metric of oxygen transport capacity but other thermally sensitive physiological indices of performance and fitness should be considered in concert.
Exceptional aerobic scope and cardiovascular performance of pink salmon (Oncorhynchus gorbuscha) may underlie resilience in a warming climate
It is suggested that the cardiorespiratory capacity of pink salmon may confer a selective advantage over other species in comparison with other Pacific salmonids.
Elevated temperature and acclimation time affect metabolic performance in the heavily exploited Nile perch of Lake Victoria
Upper thermal tolerance limits and metabolic traits of a heavily exploited, tropical freshwater fish (the Nile perch) have high thermal plasticity without incurring major energetic costs, challenging predictions that tropical species have limited thermal Plasticity and that high temperatures will be detrimental because of limitations in AS.
Thermal conditions during embryogenesis influence metabolic rates of juvenile brown trout Salmo trutta
. The projected climate change and increase in thermal conditions in northern latitudes over the next 60 yr has the potential to alter the metabolic scope and potential fi tness of aquatic ectotherms.


The timing of adult sockeye salmon migration into fresh water: adaptations by populations to prevailing thermal regimes
The timing of migration varied among populations and was primarily related to temperature regime during migration and the timing of spawning, but when temperatures were moderate, sockeye salmon tended to migrate to the vicinity of the spawning grounds about 1 month prior to spawning, regardless of the length of the freshwater migra...
Pacific Salmon in Hot Water: Applying Aerobic Scope Models and Biotelemetry to Predict the Success of Spawning Migrations
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.
Climate Change Affects Marine Fishes Through the Oxygen Limitation of Thermal Tolerance
It is shown in the eelpout, Zoarces viviparus, a bioindicator fish species for environmental monitoring from North and Baltic Seas, that thermally limited oxygen delivery closely matches environmental temperatures beyond which growth performance and abundance decrease, which will be the first process to cause extinction or relocation to cooler waters.
Thermal tolerance and metabolic physiology among redband trout populations in south-eastern Oregon
It is suggested that the physiological mechanisms that determine T crit in salmonids are highly conserved, and the use of T crit for assessing physiological function and defining thermal habitat requirements of stream-dwelling salmonids like the redband trout is questioned.
Environment, antecedents and climate change: lessons from the study of temperature physiology and river migration of salmonids
  • A. Farrell
  • Environmental Science
    Journal of Experimental Biology
  • 2009
The upper limit for heart rate may emerge as a valuable, but simple predictor of optimal temperature in active animals, opening the possibility of using biotelemetry of heart rate in field situations to explore properly the full interplay of environmental factors on aerobic scope.
Effect of water temperature, timing, physiological condition, and lake thermal refugia on migrating adult Weaver Creek sockeye salmon (Oncorhynchus nerka)
By using lakes as thermal refugia, early-timed fish likely reduce rates of disease development and may better recover from physiological stress associated with high encountered tempera- tures.
Impact and Adaptation Responses of Okanagan River Sockeye Salmon (Oncorhynchus nerka) to Climate Variation and Change Effects During Freshwater Migration: Stock Restoration and Fisheries Management Implications
We summarized existing knowledge on behavioural and physiological responses of Okanagan sockeye salmon (O. nerka) adults to annual and seasonal variations in aquatic thermal regimes during migration.
Abnormal Migration Timing and High en route Mortality of Sockeye Salmon in the Fraser River, British Columbia
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%.
Energetics and morphology of sockeye salmon: effects of upriver migratory distance and elevation
Despite large among-population differences in somatic energy at the start of upriver migration, all populations completed migration and spawning, and subsequently died, with c.