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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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Relation http://eprints.cmfri.org.in/2349/
 
Title Fishery and population dynamics of Protonibea diacanthus (Lacepede) and Otolithoides biauritus (Cantor) landed by trawlers at Vanakbara, Diu along the west coast of India
 
Creator Ghosh, Shubhadeep
Mohanraj, G
Asokan, P K
Dhokia, H K
Zala, M S
Bhint, H M
Anjani, Suker
 
Subject Sciaenids
Population Dynamics
 
Description 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.
 
Publisher CMFRI/ICAR
 
Date 2010
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
Identifier http://eprints.cmfri.org.in/2349/1/Shubhadeep_Ghosh-1.pdf
Ghosh, Shubhadeep and Mohanraj, G and Asokan, P K and Dhokia, H K and Zala, M S and Bhint, H M and Anjani, Suker (2010) 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). pp. 15-20.