Length-weight relationship and population dynamics study of the giant catfish (Arius thalassinus) in the Bay of Bengal coast of Bangladesh

Authors

  • Rokeya Sultana Chattogram Government College, Chattogram, Bangladesh
  • Mohammed Shahidul Alam Institute of Marine Sciences and Fisheries, University of Chittagong, Chittagong-4331, Bangladesh
  • KM Shahriar Nazrul Department of Fisheries, Ministry of Fisheries and Livestock, Bangladesh
  • Al Mamun Marine Fisheries Survey Management Unit, Department of Fisheries, Bangladesh
  • Md Abdullah Al Mamun Department of Fisheries, Ministry of Fisheries and Livestock, Bangladesh

DOI:

https://doi.org/10.3329/ralf.v6i3.44810

Keywords:

Length-Weight, Relationship, Arius thalassinus, Bay of Bengal

Abstract

The present study investigated the length-weight relationship, population parameters and the instantaneous natural mortality rate of Arius thalassinus from two major landing center of Bangladesh using the FAO-ICLARM Stock Assessment Tools (FiSAT II). A total of 1789 specimens were collected between January 2016 and December 2017. The estimated values of the exponent “b” was ranged from 3.019 (pre-monsoon) to 3.293 (monsoon), indicating an isometric growth pattern of the species with high correlation coefficients (0.904 to 0.927). The equation of length–weight relationship was: W=0.005L3.181. Model parameters of the von Bertalanffy growth equation were: L∞ = 97.60 cm and K = 0.33-1 year. The estimated growth performance index (Ø) was 3.497. The instantaneous natural mortality rate (M) was 0.62-1 year and a high exploitation rate (E) 0.62 (>0.50) showed that this fish is over-exploited in the Bay of Bengal coast of Bangladesh.

Res. Agric., Livest. Fish.6(3): 439-444, December 2019

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Published

2020-01-01

How to Cite

Sultana, R., Alam, M. S., Nazrul, K. S., Mamun, A., & Mamun, M. A. A. (2020). Length-weight relationship and population dynamics study of the giant catfish (Arius thalassinus) in the Bay of Bengal coast of Bangladesh. Research in Agriculture Livestock and Fisheries, 6(3), 439–444. https://doi.org/10.3329/ralf.v6i3.44810

Issue

Vol. 6 No. 3 (2019)

Section

Fisheries

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