"Penumbuhan dan Laju Eksploitasi Kerang Bulu Anodara gubernaculum (Reeve, 1844) Family Arddae di Perairan Tanjungbalai Sumalera Ulara"

Abstract

High market demand for Fur shells (A. gubernaculum), tends to the increase to greater catching capacity in decreaseing population.The aims of this study were to determine the growth and rate of exploitation of Fur Shells (A. gubernaculum) in Tanjungbalai Waters.This study was conducted for 1 Month 14 Days from October to November 2016. Data analyzed used ELEFAN I method (Electronic Lenght Frequencys Assesment Tool) by using FiSAT II (FAO- ICLARM Fish Stock Assesment Tool) software.Fur shells obtained 855 individu.The growth pattern of Fur shells is negative allometric. Negative allometric means long accretion faster than its weight gain.The range of condition factor was 0,81 – 2,15.The frequency distribution of the Fur Shells ranges from 14 to 43 mm, the dominant size group was 20 - 22 mm. The prediction of growth parameter Von Bertalanfy showed asimtot length (L∞) is 43.05 mm , the growth coefficient (K) is 1.2 / year and the theoretical life (t 0 ) of the Fur Shells is - 0.12..The total Mortality (Z) of Fur Shells was 2.77 per year. Natural mortality estimation rate (M) was 1.9 per year. The conclutionwas result of prediction exploitation rate of Fur Shells is 0.31 per year.