Population dynamics of sumbo fish Selar crumenophthalmus (Pisces: Carangidae) in Banda Aceh waters, Aceh, Indonesia

Abstract

The stock assessment aims to determine the condition of fish in aquatic environment. In addition, there has been very less research on population dynamics of S. crumenopthalmus, and particular in Aceh has never been done. The aimed of this study is to analyze the population dynamics of the sumbo fish (Selar crumenophthalmus) in Lampulo Fisheries Port, Banda Aceh. The survey has been done from February to April 2019. A total of 164 fish samples were collected. The growth parameters of von Bertalanffy growth function were utilized to analyse the population dynamics of S. crumenophthalmus, using FISAT II (FAO-ICLARM Stock Assessment Tools-II). The results show the population dynamic of infinity length (L∞) as193.2mm, growth coefficient (K) = 4.6 year-1, growth performance index (Ø) = 5.23 year-1, time at which length equals zero (t0) = -0.002 year-1 and optimum fishing length (Lopt) = 158.49mm. In addition, the total mortality rate (Z) was 8.08 year-1 with natural mortality rate (M) = 3.02 year-1, fishing mortality rate (F) = 5.06 year-1, and exploitation rate (E) = 0.63 year-1. Conclusion has been drawn based on E value analysis which reveals that the exploitation rate of sumbo fish has surpassed the sustainable limit.