Population dynamics of Megalaspis cordyla (Linnaeus, 1758) from northeastern part of the Bay of Bengal, Bangladesh


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Authors

  • Mohammad Zafar Institute of Marine Sciences, University of Chittagong, Chittagong-4331, Bangladesh
  • M G Mustafa Institute of Marine Sciences, University of Chittagong, Chittagong-4331, Bangladesh
  • M Anna Haque Institute of Marine Sciences, University of Chittagong, Chittagong-4331, Bangladesh

Abstract

Population parameters of Megalaspis cordyla from the trawl catches in the
northeastern part of the Bay of Bengal were estimated based on length-frequency
data. The asymptotic length (L°°) and growth constant (K) were estimated as 37.90
cm (total length) and 0.58/year respectively. The total mortality co-efficient (Z)
was 1.75. The estimated natural mortality (M) was 1.17 and the fishing mortality
co-efficient (F) was 0.58. The estimated value for the exploitation rate (E) using
the length converted catch curve was 0.33. The recruitment was continuous with
two peaks per year. The sizes of M. cordyla at 25, 50 and 75 per cent probabilities
of capture were 20.26, 21.80 and 23.34 cm respectively. The length-weight
relationship for combined sex was W=0.01794 TL2818.

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Author Biographies

  • Mohammad Zafar, Institute of Marine Sciences, University of Chittagong, Chittagong-4331, Bangladesh
    Institute of Marine Sciences, University of Chittagong, Chittagong-4331, Bangladesh
  • M G Mustafa, Institute of Marine Sciences, University of Chittagong, Chittagong-4331, Bangladesh
    Institute of Marine Sciences, University of Chittagong, Chittagong-4331, Bangladesh
  • M Anna Haque, Institute of Marine Sciences, University of Chittagong, Chittagong-4331, Bangladesh
    Institute of Marine Sciences, University of Chittagong, Chittagong-4331, Bangladesh

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Issue

Vol. 47 No. 3 (2000)

Section

Articles

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How to Cite

Zafar, M., Mustafa, M. G., & Haque, M. A. (2011). Population dynamics of Megalaspis cordyla (Linnaeus, 1758) from northeastern part of the Bay of Bengal, Bangladesh. Indian Journal of Fisheries, 47(3), 163-168. https://epubs.icar.org.in/index.php/IJF/article/view/8526