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

Downloads

Download data is not yet available.
Abstract
3
PDF
2

Downloads

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

License

Creative Commons
All RALF articles are published under the terms of the Creative Commons Attribution License 4.0 International License. Readers can copy, distribute, transmit and adapt the work provided the original work and source is appropriately cited.

Copyright
Submission of a manuscript implies that authors have met the requirements of the editorial policy and publication ethics. Authors retain the copyright of their articles published in the journal. However, authors agree that their articles remain permanently open access under the terms of the Creative Commons Attribution License 4.0 International License.