Catch analysis of gillnet with different shortening and mesh size in Tual Waters

Abstract

Shortening and mesh size effectiveness of gillnet was not known yet in Tual waters. The purpose of this study was to determine the effectivity of gillnet based on different shortening and mesh size and to estimate the catch diversity indeks of each mesh size. The study was conducted from April 6th - May 15th of 2011 in Tual waters. There were two phases in the study, i.e. gillnet construction and fishing experiment. Results showed that gillnet with mesh size of 2.25” and shortening of 50% catched the most number of fish (74). It was followed by gillnet of 2.50”-50% (59), 2.50”-55% (31), 2.25”-55% (24), 2.25”-45% (19), 2.50”-45% (15), 3.00”-50% (15) and 3.00”-55% (6). The Shannon indeks rate of gillnet with mesh size of 2.25” was 1.8, 2.50” (1.9) and 3.00” (1.1). While the Sympson indeks rate of gillnet with mesh size of 2,25” was 0.2, 2.50” (0.3) and 3.00” (0.4).