Effect of environmental regulated water temperature variations on survival, growth performance and haematology of African catfish, Clarias gariepinus

Our Nature Pub Date : 2017-12-25 DOI:10.3126/ON.V15I1-2.18791

J. Ogunji, J. Awoke

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引用次数: 7

Abstract

A 56 day study was carried out to evaluate effect of temperature changes on survival, growth performance and haematology of Clarias gariepinus fingerlings fed housefly maggot meal (magmeal) diet. Ninety (90) Clarias gariepinus fingerlings, (initial mean weight 4.33±0.03g) were subjected to different environmental regulated temperature conditions in three locations (laboratory, outdoor, greenhouse). The observed average temperature was 26.53±0.01°C, 26.06±0.01°C and 31.52±0.00°C for laboratory, outdoor, greenhouse, respectively. Ten fingerlings stocked per experimental tank were fed in triplicates at 5% body weight in two portions per day. It was observed that different water temperatures affected fish growth. All experimental fish in the greenhouse died after 8 days of exposure. This happened around 14.00 hrs when water temperature reached 40°C. There was no significant difference (P 0.05). The result confirms that Clarias gariepinus fingerlings reared at a mean temperature of 26°C (within the recorded optimal temperature range for good growth) performed well. Clarias gariepinus fingerlings are not able to survive when water temperature reaches to 40oC.

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环境调节水温变化对非洲鲶鱼生存、生长性能和血液学的影响

本试验旨在评价温度变化对家蝇蛆粕(magmeal)饲粮对加里平Clarias gariepinus鱼种存活、生长性能和血液学的影响。在实验室、室外和温室3个不同的环境调节温度条件下，对90只初始平均体重为4.33±0.03g的加里平Clarias gariepinus鱼种进行了研究。室内、室外、温室的平均温度分别为26.53±0.01℃、26.06±0.01℃和31.52±0.00℃。每个试验池放养10尾鱼种，按5%体重，分每天2次放养，一组3次。观察到不同水温对鱼的生长有影响。温室实验鱼暴露8天后全部死亡。这发生在14点左右，当时水温达到40°C。两组间差异无统计学意义(p0.05)。结果表明，平均温度为26°C(在记录的最适生长温度范围内)的养殖条件下，沙棘Clarias gariepinus鱼种表现良好。当水温达到40℃时，Clarias gariepinus鱼种无法存活。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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