Age and growth, mortality and stock assessment of Euthynnus affinis (Cantor) from Maharashtra waters


251 / 161

Authors

  • Mohammad Zafar Khan Central Marine fisheries Research Institute, Cochin - 682 018

Abstract

Kawakawa, Euthynnus affinis contributed on an average 1,563 t to the annual fish landings during 1996-2000 in Maharashtra. The drift net is the major gear, which exploits tuna resource. The species form about 87 % of the tuna landings by drift net at Sassoon dock (Mumbai). The other species were Thunnus
tonggol, Auxis thazard and A. rochei, which together constituted about 13.0 % of the drift gill net catch. The size range of E. affinis in the drift net was from 26 to 73 cm. The growth parameters estimated are L âˆ= 81.7 cm and K = 0.79
(annual). The total mortality coefficient (Z) varied between 2.04 and 2.88 during 1996-2000 with an average of 2.24 during the last 3 years with exploitation ratio (F/Z) of 0.6. The natural mortality coefficient (M) has been estimated
as 0.928. The biomass is 1,344 t off Maharashtra, while the present average yield is 1,722 t. The maximum sustainable yield (MSY) has been estimated as 1,725t for Maharashtra indicating that the present exploitation is close to MSY.

Downloads

Download data is not yet available.

Author Biography

  • Mohammad Zafar Khan, Central Marine fisheries Research Institute, Cochin - 682 018
    Central Marine fisheries Research Institute, Cochin - 682 018

Downloads

Issue

Vol. 51 No. 2 (2004)

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

Khan, M. Z. (2011). Age and growth, mortality and stock assessment of Euthynnus affinis (Cantor) from Maharashtra waters. Indian Journal of Fisheries, 51(2), 209-213. https://epubs.icar.org.in/index.php/IJF/article/view/7189