Research Article
Dahri Iskandar
Abstract
The objective of this study was to investigate the effect of escape vent on catch of black damsel, then size selectivity 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 pots and non escape vent pots were 3.07 and 3.38 respectively. Installing escape vent pots significantly impove catch of commercial size black damsel i.e 56.6% of total catch. A Kolmogorov-Smirnov two sample test indicated that there is significant difference on the length distribution of black damsel between escape vent pots and unvented pots. The result of size selectivity curve indicated that fish size smaller than 8 cm length have high probability to escape from escape vent pots. Length at 50 % retention occurs at fish length of 14. 67 mm.