Proteins of Oxygen-Binding and Energy Metabolism in Muscles of Antarctic Fishes: Evolutionary Adjustments to Life at Cold Temperature
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Life at Body Temperatures below 0°C: The Physiology and Biochemistry of Antarctic Fishes
Fishes of the Southern Ocean surrounding Antarctica are dominated by species of the suborder Notothenoidei. For ~14MY, these highly successful fishes have evolved under stable thermal conditions that result in a body temperature of ca. 0°C throughout their life histories. Evolution in this chronically cold environment has led to unusual physiological and biochemical characteristics. In some cas...
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Cold temperature can constrain the rate of oxygen movement through muscle cells of ectothermic animals because the kinetic energy of the solvent-solute system decreases and the viscosity of the aqueous cytoplasm increases during cooling within the physiological range of body temperatures. These factors affect the movement of both dissolved oxygen and oxymyoglobin, the two predominant routes of ...
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The effect of gradually increased water temperature on the metabolism of temperate eelpout from the North Sea (Zoarces viviparus) and Antarctic eelpout (Pachycara brachycephalum) was investigated. Standard metabolic rate (SMR) was similar in cold-adapted P. brachycephalum and cold-acclimated Z. viviparus in the low temperature range. This indicates that Antarctic eelpout show no metabolic cold ...
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تاریخ انتشار 2016