Optimum temperature of a northern population of Arctic charr (Salvelinus alpinus) using heart rate Arrhenius breakpoint analysis
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Optimum temperature of a northern population of Arctic charr (Salvelinus alpinus) using heart rate Arrhenius breakpoint analysis. / Hansen, Aslak Kappel; Byriel, David Bille; R. Jensen, Mads; Steffensen, John Fleng; Svendsen, Morten Bo Søndergaard.
In: Polar Biology, Vol. 40, No. 5, 2017, p. 1063-1070.Research output: Contribution to journal › Journal article › Research › peer-review
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T1 - Optimum temperature of a northern population of Arctic charr (Salvelinus alpinus) using heart rate Arrhenius breakpoint analysis
AU - Hansen, Aslak Kappel
AU - Byriel, David Bille
AU - R. Jensen, Mads
AU - Steffensen, John Fleng
AU - Svendsen, Morten Bo Søndergaard
PY - 2017
Y1 - 2017
N2 - Assessment of maximum aerobic scope, as a proxy for scope of activity, in ectotherms can be instrumental in predicting distributional responses to e.g. global warming. The waters of the Arctic regions represent one of the most vulnerable ecosystems to climate change. In this study, we determine the optimum temperature (Topt) of nine adult Arctic charr (Salvelinus alpinus) from Qeqertarsuaq, Greenland, using maximum heart rate (fHmax) for investigating the optimal temperatures for activity. The Arrhenius breakpoint of maximum heart rate measurements occurred between 5.9 and 8.3 °C (average = 7.5 °C ± 0.4). The Q10 breakpoint occurred at an average of 7.1 °C ± 0.3. There was no significant difference between the breakpoint temperature found using Q10 and Arrhenius [two-sample t test, df = 16; p > 0.1]. The highest fHmax was found at 12.8 °C ± 1.0 reaching an average of 61.8 BPM ± 3.1. Arrhythmia occurred between 11 and 18 °C (average = 15.2 °C ± 0.9). The results obtained in this study suggest that the studied population of Arctic charr lives at summer temperatures (−0.6 to 9.1 °C) that are optimal for activity, but an increase in temperature expected with climate change, could have an impact on life cycle events and fitness-related tasks for this northern population.
AB - Assessment of maximum aerobic scope, as a proxy for scope of activity, in ectotherms can be instrumental in predicting distributional responses to e.g. global warming. The waters of the Arctic regions represent one of the most vulnerable ecosystems to climate change. In this study, we determine the optimum temperature (Topt) of nine adult Arctic charr (Salvelinus alpinus) from Qeqertarsuaq, Greenland, using maximum heart rate (fHmax) for investigating the optimal temperatures for activity. The Arrhenius breakpoint of maximum heart rate measurements occurred between 5.9 and 8.3 °C (average = 7.5 °C ± 0.4). The Q10 breakpoint occurred at an average of 7.1 °C ± 0.3. There was no significant difference between the breakpoint temperature found using Q10 and Arrhenius [two-sample t test, df = 16; p > 0.1]. The highest fHmax was found at 12.8 °C ± 1.0 reaching an average of 61.8 BPM ± 3.1. Arrhythmia occurred between 11 and 18 °C (average = 15.2 °C ± 0.9). The results obtained in this study suggest that the studied population of Arctic charr lives at summer temperatures (−0.6 to 9.1 °C) that are optimal for activity, but an increase in temperature expected with climate change, could have an impact on life cycle events and fitness-related tasks for this northern population.
KW - Aerobic scope
KW - Climate change
KW - Heart rate
KW - Optimum temperature
KW - Oxygen transport
KW - Salvelinus alpinus
U2 - 10.1007/s00300-016-2033-8
DO - 10.1007/s00300-016-2033-8
M3 - Journal article
AN - SCOPUS:84988643625
VL - 40
SP - 1063
EP - 1070
JO - Polar Biology
JF - Polar Biology
SN - 0722-4060
IS - 5
ER -
ID: 177290800