Laboratory of Fish Ecophysiology, Department of Fisheries Management, Bangladesh Agricultural University, Mymensingh, 2202, Bangladesh.
Department of Fish Biology and Biotechnology, Faculty of Fisheries, Chattogram Veterinary and Animal Sciences University, Chattogram, 4225, Bangladesh.
Fish Physiol Biochem. 2020 Dec;46(6):2323-2330. doi: 10.1007/s10695-020-00886-6. Epub 2020 Oct 1.
Experiencing the seasonal variation and rapid global warming in the tropical climate is a common phenomenon which challenged the aquatic organisms to adapt the physiology and behavior. To investigate the effect of high-temperature acclimation, we selected Indian major carp, rohu (Labeo rohita), a commercially important freshwater aquaculture species. Oxygen consumptions, micronucleus formation in erythrocytes, and gill histopathology were observed in L. rohita fingerlings acclimated at three temperatures (30, 33, and 36 °C) for 30 days. Results showed that the highest acclimated temperature (36 °C) induced higher oxygen consumption and increased frequency of micronucleus formation in erythrocytes. Severity of different histological alterations (hyperplasia, epithelial necrosis, telangiectasis, epithelial lifting, and hypertrophy of chloride cells) in the gills was found to be increased in the highest acclimated temperature (36 °C). These findings indicate the temperature induced adaptive responses and climate vulnerability in a changing environment.
在热带气候中经历季节性变化和快速全球变暖是一种常见现象，这使得水生生物面临适应生理和行为的挑战。为了研究高温驯化的影响，我们选择了印度鲤鱼，罗非鱼（Labeo rohita），一种重要的商业淡水养殖物种。在 30、33 和 36°C 下适应 30 天的罗非鱼鱼苗中观察到耗氧量、红细胞微核形成和鳃组织病理学。结果表明，最高适应温度（36°C）诱导更高的耗氧量和红细胞微核形成频率增加。在最高适应温度（36°C）下，鳃中发现不同组织学改变（增生、上皮坏死、血管扩张、上皮抬起和氯化物细胞肥大）的严重程度增加。这些发现表明在不断变化的环境中，温度诱导了适应性反应和气候脆弱性。
