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Allometry coefficient variations of length-weight relationship of Scombridae family caught along the Tuticorin coast, Bay of Bengal
Indian Journal of Geo-Marine Sciences ( IF 0.5 ) Pub Date : 2020-05-26
Yosuva Mariasingarayan, Jeyapragash Danaraj, Manigandan Vajravelu, Machendiranathan Mayakrishnan, Saravanakumar Ayyappan

The present study assesses length-weight relationship (LWR) of Auxis thazard, Auxis rochei, Euthynnus affinis, and Katsuwonus pelamis caught by gill net along the Tuticorin coastal area. The fitted regression model resulted (log-transformed) in slope values extending from 2.9 to 3.8. The logarithmic data exhibiting the exponent value b > 3 and b < 3, confirms that the tuna species showed both negative and positive allometric growth. Particularly, K. pelamis (b < 3) indicated the negative allometric growth. The regression slope value for all the species was found to be highly significant (P < 0.05). All the species showed positive allometric growth, except K. pelamis, which exhibited negative allometric growth. Findings in the present study conclude that LWR does not follow the cubic relationship. Furthermore, studies should be carried out for more fish species to enlighten biologists about the status and growth condition of the fishes in the natural waters.

中文翻译:

孟加拉湾杜蒂戈林沿岸捕获的S科的长度-重量关系的异速系数变化

本研究评估了沿杜蒂戈林沿海地区被g网捕获的Au蚊,罗氏,、真核嗜血菌K鱼的长度-重量关系(LWR)。拟合的回归模型导致(对数转换)斜率值从2.9扩展到3.8。对数数据显示指数值b> 3和b <3,证实金枪鱼物种同时呈现出负向和正向异速生长。特别是,K.pelamis(b <3)表示异速生长为负。发现所有物种的回归斜率值均非常显着(P <0.05)。除K. pelamis外,所有物种均显示出正的异速生长,呈现出负的异速生长。本研究的发现得出结论,轻水堆不遵循立方关系。此外,应该对更多的鱼类进行研究,以启发生物学家关于鱼类在天然水域中的状况和生长状况的知识。
更新日期:2020-07-28
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