Pysiological Responses of Diploid and Triploid Far Eastern Catfish, Silurus asotus to Water Temperature Stress

Abstract

The aim of study is to contribute to this knowledge-base by investigating the respiratory function, the metabolic rate and the difference of physiological responses un-der low water temperature (20℃→15℃) stress be-tween diploid and triploid far eastern catfish, Silurus asotus. During the 48 hrs of water temperature stress exposure time, the respiratory frequencies, CO2 and NH4+ concentrations of diploid had higher values than those of triploid (p<0.05). However, pH of triploid was higher than those of diploid (p<0.05), and oxygen consumption rate was not different between diploid and triploid (p>0.05). The level of plasma cortisol and plasma glucose of triploid was lower than those of the diploid (p<0.05). However, in case of lactic acid, there were not significant between triploid and diploid (p>0.05). These results suggest that diploid was more sensitive for low water temperature stress response than triploid in this species.

Genome-Wide Identification of hsp90 Gene in Rainbow Trout ( Oncorhynchus mykiss ) and Their Regulated Expression in Response to Heat Stress

“…In fisheries, fish are often subjected to a variety of pressures, including high temperature, poor water quality, osmotic pressure, and environmental pollution, which may damage the balance between fish and the environment and cause the stress reactions of fish (Chen et al, 2010;Roberts et al, 2010;Zhang et al, 2011;Shaheen et al, 2014;Lee et al, 2018;Eissa et al, 2018;Wen et al, 2019;Xu et al, 2019). Rainbow trout, as a typical cold-water fish, has poor temperature tolerance, slow growth, and the behavior and reproduction of rainbow trout are affected by temperature changes.…”

Genome-Wide Identification of hsp90 Gene in Rainbow Trout ( Oncorhynchus mykiss ) and Their Regulated Expression in Response to Heat Stress

“…In fisheries, fish are often subjected to a variety of pressures, including high temperature, poor water quality, osmotic pressure, and environmental pollution, which may damage the balance between fish and the environment and cause the stress reactions of fish (Chen et al, 2010;Roberts et al, 2010;Zhang et al, 2011;Shaheen et al, 2014;Lee et al, 2018;Eissa et al, 2018;Wen et al, 2019;Xu et al, 2019). Rainbow trout, as a typical cold-water fish, has poor temperature tolerance, slow growth, and the behavior and reproduction of rainbow trout are affected by temperature changes.…”

Genome-Wide Identification of hsp90 Gene in Rainbow Trout ( Oncorhynchus mykiss ) and Their Regulated Expression in Response to Heat Stress

“…In fisheries, fish are often subjected to a variety of pressures, including high temperature, poor water quality, osmotic pressure, and environmental pollution, which may damage the balance between fish and the environment and cause the stress reactions of fish (Chen et al, 2010;Roberts et al, 2010;Zhang et al, 2011;Shaheen et al, 2014;Lee et al, 2018;Eissa et al, 2018;Wen et al, 2019;Xu et al, 2019). Rainbow trout, as a typical cold-water fish, has poor temperature tolerance, slow growth, and the behavior and reproduction of rainbow trout are affected by temperature changes.…”

Genome-Wide Identification of hsp90 Gene in Rainbow Trout ( Oncorhynchus mykiss ) and Their Regulated Expression in Response to Heat Stress

“…In fisheries, fish are often subjected to a variety of pressures, including high temperature, poor water quality, osmotic pressure, and environmental pollution, which may damage the balance between fish and the environment and cause the stress reactions of fish (Chen et al, 2010;Roberts et al, 2010;Zhang et al, 2011;Shaheen et al, 2014;Lee et al, 2018;Eissa et al, 2018;Wen et al, 2019;Xu et al, 2019). Rainbow trout, as a typical cold-water fish, has poor temperature tolerance, slow growth, and the behavior and reproduction of rainbow trout are affected by temperature changes.…”