Volume 24, Issue 4 p. 391-393
RESEARCH NOTE

Length–weight relationships of five catfish species (Siluriformes) from the Ganga River, India

Deepmala Gupta

Deepmala Gupta

Department of Zoology, University of Lucknow, Lucknow, Uttar Pradesh, India

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Arvind Kumar Dwivedi

Arvind Kumar Dwivedi

Department of Habitat Ecology, Wildlife Institute of India, Dehradun, Uttarakhand, India

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Madhu Tripathi

Corresponding Author

Madhu Tripathi

Department of Zoology, University of Lucknow, Lucknow, Uttar Pradesh, India

Correspondence

Madhu Tripathi, Department of Zoology, University of Lucknow, Lucknow-226007, Uttar Pradesh, India.

Email: drmtripathi@gmail.com

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First published: 31 October 2019

Abstract

Knowledge of the length–weight relationships (LWRs) of fish is an important tool to understand fish body form, growth pattern, stock management and their conservation. The present study focused on investigating the length–weight relationships for five catfish species, Pachypterus atherinoides (Bloch, 1794), belonging to family Horabagridae; Batasio batasio (Hamilton, 1822) family Bagridae; Bagarius yarrelli (Sykes, 1839), family Gogangra viridescens (Hamilton, 1822); and Sisor rhabdophorus (Hamilton, 1822) belonging to family Sisoridae. Specimens were collected from the middle stretch of the Ganga River in India from November 2016 to May 2018. A total of 174 specimens of five fish species were collected, and their total lengths were measured to the nearest centimetre and the body weight to the nearest gram. The value of the parameter slope (b) of LWRs of the five species ranged from 2.86 (B. yarrelli) to 3.16 (G. viridescens), with a mean value of 2.99. The results of the present study documented the new maximum total length (TL) for P. atherinoides and S. rhabdophorus. The present study also provides the first reference regarding LWRs for S. rhabdophorus.

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