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<span style="font-size:11.0pt;font-family: "Times New Roman";mso-fareast-font-family:"Times New Roman";mso-bidi-font-family: Mangal;mso-ansi-language:EN-GB;mso-fareast-language:EN-US;mso-bidi-language: HI" lang="EN-GB">Studies on juveniles and Size selection of Threadfin bream (<i>Nemipterusjaponicus</i>) in bottom trawling off Mangalore</span>

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Title Studies on juveniles and Size selection of Threadfin bream (Nemipterusjaponicus) in bottom trawling off Mangalore
 
Creator Bhairol, Hanumanthappa
Dora, K. C.
Talwar, N. A.
 
Subject Size selection
High opening bottom trawl
Square mesh
Diamond size
 
Description 249-253
Size selection studies for threadfin breams
were carried out with square shape meshed cod-ends of 20, 30 and 40 mm mesh size at high
opening bottom trawl (HOBT). Results were compared with conventional HOBT. Experiments
were conducted at depth of 40-90
meter off Mangalore from September 2003 to May 2004. Results
revealed that fish measuring more than 15 cm contributed to the highest percentage of
total catch (40%) followed by 10-15
cm group (33.2%) and 15.3% of the size group of 5-10 cm. Fish measuring less
than 5 cm
contributed to an average of 11.5% to the total catch. Size selectivity of
threadfin breams showed that the high peak frequencies in HOBT with
diamond-meshed codend than that of square meshed cod ends. When compare the
catches, the bigger sized are more valued fishes which are retained in the square
mesh cod-end.
 
Date 2013-04-13T10:55:42Z
2013-04-13T10:55:42Z
2013-04
 
Type Article
 
Identifier 0975-1033 (Online); 0379-5136 (Print)
http://hdl.handle.net/123456789/16934
 
Language en_US
 
Rights CC Attribution-Noncommercial-No Derivative Works 2.5 India
 
Publisher NISCAIR-CSIR, India
 
Source IJMS Vol.42(2) [April 2013]