Population dynamic of Big Eye Scad (Selar crumenophthalmus Bloch, 1793) in Kwandang Waters-Sulawesi Sea

¹ Researcher at Research Institute for Marine Fisheries, Bogor, Indonesia
² Researcher at Research at Center for Fisheries, Jakarta, Indonesia

^* Corresponding author: umi_chodriyah@yahoo.co.id

Abstract

Big eye scad (Selar crumenophthalmus) is one of important small pelagic fish which is exploited in Kwandang waters-Sulawesi Sea. The exploitation of this species has been increasing every year. This research was carried out to study the growth, mortality and exploitation of bigeye scad in the Kwandang waters during January-November 2016. The von Bertalanffy growth equation was derived as Lt = 25.95(1 - e ^{1,01(t+-0.16374)}) with length between 14.9 -26.4 cm FL (average length 18,64 cm). The size at first capture (Lc) was estimated as 18.69 cm. The total, natural and fishing mortality rates were assessed as 4.28, 1.90 and 2.38 year−1, respectively. The exploitation rate (E) of 0.56 per year indicates that the degree of harvesting leads to a more capture condition.. The management that must be applied is to reduce fishing efforts to 12% of the current situation and to consider temporarily closing fishing activities (closing season).