Hook Rate Rawai Dasar Layangan (RDL) Studi Produktivitas Rawai Dasar yang Dimodifikasi di Perairan Selat Lembeh Bitung Sulut

Abstract

This study compared the catch productivity (hook rate) of a modified flying bottom longline (RDL) and a conventional bottom longline (RDK), and examined their catch composition. The modified design used shorter branch lines placed closer together along the main line, allowing hooks to float above the seabed under the influence of currents. Six experimental fishing trips were conducted in the Lembeh Strait, Bitung, North Sulawesi, between August and October 2020. The hook-rate data met the normality and homogeneity assumptions. The modified longline achieved higher hook rates than the conventional gear at depths of both 10 and 20 meters. Fresh squid and scad bait produced significant differences in catch between fishing gear types, whereas fishing depth did not significantly affect catches. The modified gear caught eleven demersal fish species, compared with eight species caught by the conventional longline.