alexa Comparative Selectivty and Catchabilty of Pot and Tube for Conger Eel (Conger myriaster) | OMICS International | Abstract
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Research Article

Comparative Selectivty and Catchabilty of Pot and Tube for Conger Eel (Conger myriaster)

Abstract

catchability between pot and tube for white spotted conger eel (Conger Myriaster). About ten times
comparative fishing experiments were carried out off Haneda in Tokyo Bay, during October and November
every year from 1997 to 2000. The experiment used collapsible pots of 5 mesh openings (21.0, 18.1, 15.5,
13.6 and 11.6 mm) and tube of 9.06 mm hole diameter as control gear. Result of this experiment indicated
that pot of larger mesh size caught larger conger. Significant different was found in in length distributions
between the four years (ANOVA Test, P=1.9x10-45) and then the data were not combined for the analysis. In
term of girth-perimeter ratio, R value of 50% retention and selection range were calculated to be 1.19 and
0.24 from estimated logistic parameters, (α,β)=(-10.67, 8.99). When catchability of tube was assumed to be 1,
relative catchability of pot with 21.0, 18.1, 15.5, 13.6 and 11.6 mm mesh openings were 0.62, 0.79, 0.73, 0.63
and 0.51, respectively. This suggested that one tube could catch more conger eel than one pot and pot of
larger mesh size was likely to catch of larger size more effectively

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