Abstract
The effect of temperature on Cyprinus carpio spermatozoa in vitro was investigated with spermatozoa activated at 4, 14, and 24°C. At 30s post-activation, motility rate was significantly higher at 4°C compared to 14 and 24°C, whereas highest swimming velocity was observed at 14°C. The thiobarbituric acid-reactive substance (TBARS) content was significantly higher at 14°C and 24°C than at 4°C in motile spermatozoa. No significant differences in catalase and superoxide dismutase activity relative to temperature were observed. This study provides new information regarding effect of temperature on lipid peroxidation intensity and spermatozoon motility parameters in carp. The elevation of TBARS seen at higher temperatures could be due to inadequate capacity of antioxidant enzymes to protect the cell against the detrimental effects of oxidative stress induced by higher temperatures.
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