Fisheries characteristics and biology of Indo-Pacific King Mackerel in Tarakan Waters, North Kalimantan

Abstract

The Indo-Pacific king mackerel (Scomberomorus gutatus) is one of the catches of drift gill nets in the waters of Tarakan, north Kalimantan, and makes an important contribution to fisheries production in the region. In order for its use to be sustainable, it is necessary to make efforts to manage fish resources based on studies of fisheries and their biology. Monthly data for the period January to November 2021 were obtained from tangkahan based on tarakan with the aim of obtaining information and analyzing the dimensions of fishing gear, fishing grounds, catch composition, frequency of fish size, and fishing effort (cpue). Furthermore, fish biology data were analyzed by the analytical method. the results showed that there was a change in the dimensions of the longer fishing gear; the abundance of fish caught by drift gill nets was dominated by indo-pacific king mackerel (Scomberomorus gutatus) (49.3%), dorab wolf-herring (Chirocentrus dorab) (12.8%), fourfinger threadfin (Eleutheronema tetradactylum) (8.5%), silver grunt (Pomadasys argenteus) (4.7%), narrowbar spanish mackerel (Scomberomorus commerson) (4.3%), barramundi (Lates calcarifer) (2.3%), goldstripe sardinella (Sardinella gibbosa) (2.2%), common pike conger (Muraenesox bagio) (2.2%), daggertooth pike conger (Muraenesox cinereus) (1.9%), needleskin queenfish (Scomberoides tol) 1.7%, great barracuda (Sphyraena barracuda) 1.3%, and other fish (11.1%). The distribution of fishing grounds is dominated by grid 6005 by 46.5%, grid 6004 by 7.08%, and grid 5760 by 6.7%. The length at first capture (lc) of mackerel was 38.06 cmfl. The yield per unit effort (cpue) of drift gill nets in Tarakan is an average of 44.3 kg/day.