Stock Assessment of Indian Mackerel (Rastrelliger kanagurta) Landed at Tanjung Beringin’s Auction Place Serdang Bedagai, Sumatera Utara

Abstract

Indian Mackerel (Rastrelliger kanagurta) is one of the main catch fishery at Tanjung Beringin’s Auction Place, Serdang Bedagai, Sumatera Utara. The purpose of this research is to analyze the stock status of indian mackerel landed at Tanjung Beringin. This research was conduted in July – September 2021. The method of research used purposive sampling method. The total sample fish of indian mackerel were 272 individuals. The research showed Indian mackerel’s sex ratio was 1: 1.060. Indian mackerel’s growth pattern was negative allometric. Value estimation of male and female’s L∞ was 268.80 mm and 295.05 mm. Value K of male mackerel was bigger than female. But value of Lc and Lm male mackerel were smaller than female. The total rate of mortality was 2.466/year, natural mortality was 0.684/year and fishing mortality (F) was 1.782/year. The rate of exploitation was 0,723 classified as high exploitation level (overfishing).