Fishery and population dynamics of Protonibea diacanthus (Lacepede) and Otolithoides biauritus (Cantor) landed by trawlers at Vanakbara, Diu along the west coast of India


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Authors

  • Shubhadeep Ghosh
  • G Mohanraj
  • P K Asokan
  • H K Dhokia
  • M S Zala
  • H M Bhint
  • Anjani Suker

Abstract

The fishery and population characteristics of larger sciaenids Protonibea diacanthus (Lacepede) and Otolithoides biauritus
(Cantor) landed by trawlers at Vanakbara, Diu were studied for the period 2003 – 2007. The average annual catch of
P. diacanthus was 770.6 t and that of O. biauritus was 1018.6 t, together contributing 12% to the total trawl catch at Vanakbara.
Majority of the larger sciaenids were landed during September - December. The von Bertalanffy growth equation was
Lt = 145.3 [1 – e - 0.14 (t + 0.0738)] for P. diacanthus and Lt = 160 [1 – e - 0.19 (t + 0.0638)] for O. biauritus. The mortality rates M, F and
Z computed for P. diacanthus were 1, 0.30 and 0.61 and for O. biauritus were 7, 0.33 and 0.70. The exploitation ratio (E) was
0.49 for P. diacanthus and 0.47 for O. biauritus. A maximum increase in relative yield by 2.7% for P. diacanthus could be
realized by decreasing the present level of fishing by 20%, while for O. biauritus the present fishing effort is at optimum
level.

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Submitted

2016-09-24

Published

2016-09-24

Issue

Vol. 57 No. 2 (2010)

Section

Articles

License

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

Ghosh, S., Mohanraj, G., Asokan, P. K., Dhokia, H. K., Zala, M. S., Bhint, H. M., & Suker, A. (2016). Fishery and population dynamics of Protonibea diacanthus (Lacepede) and Otolithoides biauritus (Cantor) landed by trawlers at Vanakbara, Diu along the west coast of India. Indian Journal of Fisheries, 57(2), 15-20. https://epubs.icar.org.in/index.php/IJF/article/view/61757