Temperature is considered as an important environmental factor, and the increasing water temperature resulting from global warming is a great concern. The present study was conducted to examine the effects of elevated water temperature on growth, hemato‐biochemical parameters in Nile tilapia, Oreochromis niloticus acclimatized to three temperatures (31°C, 34°C and 37°C) for 60 days. Additionally, erythrocytic cellular abnormalities (ECA) and erythrocytic nuclear abnormalities (ENA) tests were assayed using peripheral erythrocytes after exposure to the three temperatures. Fish were sacrificed on days 7, 15, 30 and 60 of exposure. Growth performances viz., weight gain, % weight gain and specific growth rate (SGR) showed decreasing tendency at 34°C but significantly declined at 37°C compared to 31°C. The abundance of haemoglobin (Hb) and red blood cells (RBCs) significantly decreased in response to temperature increases, while white blood cells (WBCs) displayed the opposite response. At days 7 and 15, blood glucose levels significantly increased in response to the temperature increase, while at days 30 and 60 glucose declined. Frequencies of ECA and ENA were significantly enhanced at the highest temperature throughout the experimental period. Dissolved oxygen decreased and free CO₂ increased significantly with increasing temperature throughout the study period. The present study revealed that temperatures higher than 34°C may be hazardous to O. niloticus.

中文翻译：

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温度升高会影响生长和血液生化参数，从而导致尼罗罗非鱼尼罗罗非鱼的红细胞形态异常

温度被认为是重要的环境因素，并且由于全球变暖而导致水温升高是一个令人严重关注的问题。本研究的目的是检查水温升高对生长的影响，在尼罗罗非鱼造血-生物化学参数，尼罗罗非鱼适应了三种温度（31°C，34°C和37°C）达60天。此外，在暴露于这三种温度后，使用外周血红细胞对红细胞异常（ECA）和红细胞核异常（ENA）进行了检测。在暴露的第7、15、30和60天处死鱼。与31°C相比，生长性能即体重增加，％体重增加和比生长率（SGR）在34°C下显示下降趋势，但在37°C下显着下降。随着温度的升高，血红蛋白（Hb）和红细胞（RBC）的丰度显着降低，而白细胞（WBC）显示出相反的响应。在第7和15天，血糖水平随温度升高而显着增加，而在30和60天，血糖下降。在整个实验期间，在最高温度下ECA和ENA的频率均显着提高。溶解氧减少，游离CO在整个研究期间，随着温度的升高₂显着增加。本研究表明，温度高于34°C可能对O有害。 尼罗罗非鱼。