The effect of the rate of temperature increase on the critical thermal maximum for parr of Atlantic salmon and brown trout

Elliott, J. M.; Elliott, J.A.K.

doi:10.1111/j.1095-8649.1995.tb06014.x

Cited by 94 publications

(67 citation statements)

References 9 publications

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“…Data among aquaria were identical; therefore statistics were calculated combining the data of the 15 fish used for each captivity time. (Elliot and Elliot, 1995), (c) Salmo trutta (Elliot and Elliot, 1995), (d) Oncorhynchus kisutch (Becker and Genoway, 1979), (e) Lepomis macrochirus (Cox, 1974;Becker and Genoway, 1979), (f) Rutilus rutilus (Cocking 1959) and (g) Other species. and Elliot (1995) using two Salmo species, determined thermal tolerance using slow heating rates and showed trends remarkably similar to ours with those rates (Figs.…”

Section: Resultsmentioning

confidence: 99%

Effect of the rate of temperature increase of the dynamic method on the heat tolerance of fishes

Mora¹,

Maya²

2006

Journal of Thermal Biology

133

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Section: Resultsmentioning

confidence: 99%

Effect of the rate of temperature increase of the dynamic method on the heat tolerance of fishes

Mora¹,

Maya²

2006

Journal of Thermal Biology

133

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“…Both the time that experimental animals are given to acclimate and the heating/cooling rates used during tolerance measurement are methodological factors that could influence the amount of plasticity measured [30,42]. However, data on acclimation times and heating/cooling rates were not given for all populations, so including these factors in our full models would result in a loss of data to test our hypotheses.…”

Section: Methodsmentioning

confidence: 99%

Plasticity in thermal tolerance has limited potential to buffer ectotherms from global warming

2015

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Global warming is increasing the overheating risk for many organisms, though the potential for plasticity in thermal tolerance to mitigate this risk is largely unknown. In part, this shortcoming stems from a lack of knowledge about global and taxonomic patterns of variation in tolerance plasticity. To address this critical issue, we test leading hypotheses for broad-scale variation in ectotherm tolerance plasticity using a dataset that includes vertebrate and invertebrate taxa from terrestrial, freshwater and marine habitats. Contrary to expectation, plasticity in heat tolerance was unrelated to latitude or thermal seasonality. However, plasticity in cold tolerance is associated with thermal seasonality in some habitat types. In addition, aquatic taxa have approximately twice the plasticity of terrestrial taxa. Based on the observed patterns of variation in tolerance plasticity, we propose that limited potential for behavioural plasticity (i.e. behavioural thermoregulation) favours the evolution of greater plasticity in physiological traits, consistent with the 'Bogert effect'. Finally, we find that all ectotherms have relatively low acclimation in thermal tolerance and demonstrate that overheating risk will be minimally reduced by acclimation in even the most plastic groups. Our analysis indicates that behavioural and evolutionary mechanisms will be critical in allowing ectotherms to buffer themselves from extreme temperatures.

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“…This explains why survival thresholds identified by heating or cooling within minutes or hours in fish (cf. Elliott and Elliott 1995) or even in Antarctic invertebrates (Lahdes 1995;Urban 1998) are found to be higher in the warm (lower in the cold) than the limits of long-term thermal tolerance. Mainly the latter are ecologically relevant, whereas the former may be correlated with the latter.…”

Section: Thermal Tolerance Limits In Air Breathersmentioning

confidence: 98%

Climate change and temperature-dependent biogeography: oxygen limitation of thermal tolerance in animals

Pörtner

2001

Naturwissenschaften

957

232

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Recent years have shown a rise in mean global temperatures and a shift in the geographical distribution of ectothermic animals. For a cause and effect analysis the present paper discusses those physiological processes limiting thermal tolerance. The lower heat tolerance in metazoa compared with unicellular eukaryotes and bacteria suggests that a complex systemic rather than molecular process is limiting in metazoa. Whole-animal aerobic scope appears as the first process limited at low and high temperatures, linked to the progressively insufficient capacity of circulation and ventilation. Oxygen levels in body fluids may decrease, reflecting excessive oxygen demand at high temperatures or insufficient aerobic capacity of mitochondria at low temperatures. Aerobic scope falls at temperatures beyond the thermal optimum and vanishes at low or high critical temperatures when transition to an anaerobic mitochondrial metabolism occurs. The adjustment of mitochondrial densities on top of parallel molecular or membrane adjustments appears crucial for maintaining aerobic scope and for shifting thermal tolerance. In conclusion, the capacity of oxygen delivery matches full aerobic scope only within the thermal optimum. At temperatures outside this range, only time-limited survival is supported by residual aerobic scope, then anaerobic metabolism and finally molecular protection by heat shock proteins and antioxidative defence. In a cause and effect hierarchy, the progressive increase in oxygen limitation at extreme temperatures may even enhance oxidative and denaturation stress. As a corollary, capacity limitations at a complex level of organisation, the oxygen delivery system, define thermal tolerance limits before molecular functions become disturbed.

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The effect of the rate of temperature increase on the critical thermal maximum for parr of Atlantic salmon and brown trout

Cited by 94 publications

References 9 publications

Effect of the rate of temperature increase of the dynamic method on the heat tolerance of fishes

Effect of the rate of temperature increase of the dynamic method on the heat tolerance of fishes

Plasticity in thermal tolerance has limited potential to buffer ectotherms from global warming

Climate change and temperature-dependent biogeography: oxygen limitation of thermal tolerance in animals

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