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This Author published in this journals
All Journal Buletin PSP Maspari Journal JOURNAL OF COASTAL DEVELOPMENT Albayan : Journal of Islam and Muslim Societies
Dahri Iskandar Dahri Iskandar
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Religion Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Education Immunology & microbiology Law, Crime, Criminology & Criminal Justice Social Sciences Other

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Journal : journal of coastal development

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COMPARATIVE SELECTIVITY AND CATCHABILTY OF POT AND TUBE FOR CONGER EEL (Conger Myriaster) Dahri Iskandar
JOURNAL OF COASTAL DEVELOPMENT Vol 14, No 3 (2011): Volume 14, Number 3, Year 2011
Publisher : JOURNAL OF COASTAL DEVELOPMENT

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Abstract

The objective of this experiment was  to develop a method to estimate mesh selectivity of pot and comparative 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 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.
EFFECT OF ESCAPE VENT ON CATCHABILITY AND SELECTIVITY OF POT FOR BLACK DAMSEL (Neoglyphidodon melas) Dahri Iskandar
JOURNAL OF COASTAL DEVELOPMENT Vol 14, No 2 (2011): Volume 14, Number. 2, Year 2011
Publisher : JOURNAL OF COASTAL DEVELOPMENT

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Abstract

The objective of this study was to investigate the effect of escape vent on catch of black damsel, then sizeselectivity of escape vent will be estimated to predict the retention probability of escape vent on black damsel.The result of this study indicated that comparison of diversity index between the catches of escape vent potsand non escape vent pots were 3.07 and 3.38 respectively. Installing escape vent pots significantly impovecatch of commercial size black damsel i.e 56.6% of total catch. A Kolmogorov-Smirnov two sample testindicated that there is significant difference on the length distribution of black damsel between escape ventpots and unvented pots. The result of size selectivity curve indicated that fish size smaller than 8 cm lengthhave high probability to escape from escape vent pots. Length at 50 % retention occurs at fish length of 14.67 mm.
Co-Authors Ade Guntur Rahmad Caesario