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Selectivity characteristics of 35 mm diamond and square mesh cod-ends with respect to Johnius macrorhynus and Photopectoralis bindus from east coast of India

Indian Agricultural Research Journals

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Title Selectivity characteristics of 35 mm diamond and square mesh cod-ends with respect to Johnius macrorhynus and Photopectoralis bindus from east coast of India
 
Creator KAMEI, G.
R. Raghu Prakash
U. Sreedhar
 
Description Selectivity characteristics of 35 mm diamond and square mesh cod-ends were studied from commercial trawlers off Kakinada, Andhra Pradesh. The L25, L50 and L75 of Johnius macrorhynus were 4.54, 7.04, 9.54 cm respectively for 35 mm diamond mesh cod-end, and 4.83, 7.17, 9.50 for square mesh cod-end. The selection ranges were 5.0 and 4.67 for J. macrorhynus for diamond and square mesh cod-end respectively. Selection factors for diamond and square were 2.01 and 2.04 respectively. The L25, L50, L75 values ofPhotopectoralis bindus were 2.30, 5.63, 8.96 cm respectively for diamond mesh cod-end and 3.85, 7.53, 11.21cm for square mesh cod-end. Selection ranges were 6.66 and 7.36 for diamond and square mesh cod-end respectively. Selection factor and selection ratio were1.60 and 1.90 for diamond and 2.15 and 2.10 for square mesh cod-ends respectively. Overall, square mesh showed better selectivity over diamond mesh cod-end trawl net during the investigation.
Keywords: Diamond mesh, Escaped, Retained, Selectivity, Square mesh
 
Publisher Central Marine Fisheries Research Institute (on behalf of Indian Council of Agricultural
 
Date 2024-06-30
 
Type info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
 
Format application/pdf
 
Identifier https://epubs.icar.org.in/index.php/IJF/article/view/122007
10.21077/ijf.2024.71.2.122007-04
 
Source Indian Journal of Fisheries; Vol. 71 No. 2 (2024)
0970-6011
 
Language eng
 
Relation https://epubs.icar.org.in/index.php/IJF/article/view/122007/54941
 
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