Cardiorespiratory responses in an Antarctic fish suggest limited capacity for thermal acclimation
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چکیده
منابع مشابه
Cardiorespiratory responses in an Antarctic fish suggest limited capacity for thermal acclimation.
Polar fishes are at high risk from increasing seawater temperatures. Characterising the physiological responses to such changes may both clarify mechanisms that permit life under extreme conditions and identify limitations in the response to continued global warming. We hypothesised that Notothenia coriiceps would show physiological compensation after an acute exposure to 5°C, and following 6 w...
متن کاملOxygen-limited thermal tolerance in Antarctic fish
Mark, F. C., C. Bock, and H. O. Pörtner. Oxygen limited thermal tolerance in Antarctic fish investigated by MRI and 31P-MRS. Am J Physiol Regul Integr Comp Physiol 283: R1254–R1262, 2002. First published August 8, 2002; 10.1152/ajpregu.00167.2002.—The hypothesis of an oxygenlimited thermal tolerance was tested in the Antarctic teleost Pachycara brachycephalum. With the use of flow-through respi...
متن کاملThermal acclimation in Antarctic fish: transcriptomic profiling of metabolic pathways.
It is widely accepted that adaptation to the extreme cold has evolved at the expense of high thermal sensitivity. However, recent studies have demonstrated significant capacities for warm acclimation in Antarctic fishes. Here, we report on hepatic metabolic reorganization and its putative molecular background in the Antarctic eelpout (Pachycara brachycephalum) during warm acclimation to 5°C ove...
متن کاملAntarctic fish can compensate for rising temperatures: thermal acclimation of cardiac performance in Pagothenia borchgrevinki.
Antarctic fish Pagothenia borchgrevinki in McMurdo Sound, Antarctica, inhabit one of the coldest and most thermally stable of all environments. Sea temperatures under the sea ice in this region remain a fairly constant -1.86 degrees C year round. This study examined the thermal plasticity of cardiac function in P. borchgrevinki to determine whether specialisation to stable low temperatures has ...
متن کاملAntarctic Fish Blood: Respiratory Properties and the Effects of Thermal Acclimation
1. The effects of thermal acclimation on whole blood oxygen affinity were examined in the antarctic fish Pagothenia borchgrevinki. 2. 4-5 °C-acclimated fish had a P50 value of 26-7 mrnHg at pH 8*1, compared to 20-7 mmHg for — l-5°C-acclimated fish. The apparent heat of oxygenation, AH = — 26-7kJmol~, is comparable to values for temperate species. 3. Warm-acclimation was followed by an increased...
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ژورنال
عنوان ژورنال: Journal of Experimental Biology
سال: 2016
ISSN: 1477-9145,0022-0949
DOI: 10.1242/jeb.130963