Kajian Biologi Perikanan Ikan Kerapu Bara di Perairan Kabupaten Kepulauan Raja Ampat

Abstract

Grouper (Epinephelus retouti) or also known as the Red-tipped grouper is one of the economically important type of grouper that is widely exported and live on coral reef ecosystems. Coral reef ecosystem impact damage to biota existence the symbiotes in it, including the grouper bara. Changes the State of the environment influence on the biological condition of the fishery. Research on the study of the fisheries biology grouper done in the waters of Raja Ampat Islands conducted in August 2015. This research aims to analyze the value of (1) the leght at first maturity (Lm), and legth at first capture (Lc); (2) analyze the relationship of length weight (the pattern of growth). The data were analyzed by using the formula: L 50 = −b 0 b 1 (prediction of the leght at first maturity = Lm) and the L 50% = S1 S2(the legth at first capture = Lc); W = αL β (pattern of growth). The results showed that Grouper Bara in the waters ofWest Waigeo had Lm 29,91 cm dan Lc 25,37 cm, showed that the grouper can't catch (Lc < Lm). Result of the relationship of length weight, can b value was 2,219 or b < 3 (negative allometric, length accretion faster weight accretion). Pattern of growth was allow equation W= 0,145L 2,219