Stock delineation in Clupisoma garua (Hamilton, 1822) populations of Ganga riverine system using truss network analysis


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Authors

  • Ipsita Biswas Department of Fisheries Resource Management, Faculty of Fishery Sciences, WBUAFS, Kolkata – 700 094, India
  • T. S. Nagesh Department of Fisheries Resource Management, Faculty of Fishery Sciences, WBUAFS, Kolkata – 700 094, India
  • A. M. Sajina Fisheries Resource and Environment Management Division, ICAR-CIFRI, Barrackpore, Kolkata – 700 120, India.

https://doi.org/10.21077/ijf.2019.66.2.77163-01

Abstract

Stock identification of fish plays a significant role in management of fishery resources. It is considered as the  precursor to species conservation and imperative for declining fish populations. The stock structure of Clupisoma garua (Hamilton, 1822) populations of Ganga riverine system was studied using truss network analysis. A total of 306 fish specimens obtained from river Ganga in Allahabad, Farakka and Triveni were used to construct the truss network. The truss variables were subjected to principal component analysis (PCA) in which the first component explained 46.71% and the second 14.66% representing body depth and caudal regions of fish, respectively. Bivariate plots of PCA and discriminant function (DF) analysis revealed that it is a single continuous stock in the study area of the river Ganga and the misclassification of DF indicated only a marginal morphological difference. The results indicated the need for a uniform management strategy appropriate for population of C. garua in the river Ganga.

Keywords: Catfish, Conservation, Ganga River, PCA, Stock assessment

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Submitted

2018-03-21

Published

2019-06-30

Issue

Vol. 66 No. 2 (2019)

Section

Articles

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The copyright of the articles published in Indian Journal of Fisheries vests with the Indian Council of Agricultural Research, who has the right to enter into any agreement with any organization in India or abroad engaged in reprography, photocopying, storage and dissemination of information contained in these journals. The Council has no objection in using the material, provided the information is being utilized for academic purpose but not for commercial use. Due credit line should be given to the ICAR where information will be utilized.

How to Cite

Biswas, I., Nagesh, T. S., & Sajina, A. M. (2019). Stock delineation in Clupisoma garua (Hamilton, 1822) populations of Ganga riverine system using truss network analysis. Indian Journal of Fisheries, 66(2). https://doi.org/10.21077/ijf.2019.66.2.77163-01