Length-Weight Relationships (LWRs) of Four Loach Species of the Cobitidae Family from the Surma River, Bangladesh

IF 0.7 4区农林科学 Q4 FISHERIES

Journal of Applied Ichthyology Pub Date : 2023-12-08 DOI:10.1155/2023/6654237

S. Nasren, Md Zobayer Rahman, MD Shahinul Islam, Rasel Mia, Sohel Mian, Md. Abdullah-Al Mamun

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引用次数: 0

Abstract

Four loaches, namely, Lepidocephalichthys guntea (Hamilton, 1822), Lepidocephalichthys annandalei (Chaudhuri, 1912), Lepidocephalichthys thermalis (Valenciennes, 1846), and Lepidocephalichthys berdmorei (Blyth, 1860) from the Cobitidae family, were collected from the Surma River, Bangladesh. Of the total 376 speciminia, 193 males (51.32%) and 183 females (48.67%) in number; were collected with the support of local fishermen using a variety of nets at 15-day intervals from November 2022 to April 2023. The length-weight relationship (LWR) parameters were analyzed using the equation W = a L b . L. annandalei displayed a notable isometric growth pattern, with a condition factor (K) ranging from 0.725 to 0.734. In addition, L. thermalis exhibited isometric growth among males, while females showcased positive allometric growth with a condition factor (K) varying between 0.697 and 0.714. L. guntea exhibited a consistent positive allometric growth pattern across all aspects, with a condition factor (K) ranging from 0.729 to 0.738. In contrast, L. berdmorei demonstrated positive allometric growth, but males and females both exhibited a negative allometric growth pattern. The condition factor (K) for L. berdmorei ranged from 0.699 to 0.702. This suggests a complex growth pattern influenced by both length and weight in every experimental loach. The research underscores the importance of recognizing gender-specific variations in growth patterns within species.

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孟加拉国苏尔玛河四种梭子蟹科泥鳅的长度-重量关系（LWRs）

从孟加拉国苏尔玛河采集到4只泥鳅，分别为:Lepidocephalichthys guntea (Hamilton, 1822年)、Lepidocephalichthys annandalei (Chaudhuri, 1912年)、Lepidocephalichthys thermalis (Valenciennes, 1846年)和Lepidocephalichthys berdmorei (Blyth, 1860年)。376个标本中，雄性193个(51.32%)，雌性183个(48.67%);在2022年11月至2023年4月期间，在当地渔民的支持下，每隔15天使用各种渔网收集一次。利用方程W = a L b分析了长度-权重关系(LWR)参数。水杨花的生长条件因子(K)在0.725 ~ 0.734之间，呈显著的等长生长模式。另外，雄性热刺呈等长生长，雌性呈异速生长，条件因子K在0.697 ~ 0.714之间。冈茶在各方面均表现出一致的正异速生长模式，条件因子K在0.729 ~ 0.738之间。相比之下，白桦尺蠖表现为正异速生长，雌雄均表现为负异速生长。条件因子(K)为0.699 ~ 0.702。这表明，每条实验泥鳅的生长模式都受到长度和体重的复杂影响。这项研究强调了认识到物种内生长模式的性别差异的重要性。

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来源期刊

Journal of Applied Ichthyology 生物-海洋与淡水生物学

CiteScore

2.30

自引率

11.10%

发文量

审稿时长

3-8 weeks

期刊介绍： The Journal of Applied Ichthyology publishes articles of international repute on ichthyology, aquaculture, and marine fisheries; ichthyopathology and ichthyoimmunology; environmental toxicology using fishes as test organisms; basic research on fishery management; and aspects of integrated coastal zone management in relation to fisheries and aquaculture. Emphasis is placed on the application of scientific research findings, while special consideration is given to ichthyological problems occurring in developing countries. Article formats include original articles, review articles, short communications and technical reports.