The growth model composition of giant prawns (Macrobrachium rosenbergii) in Muara Tepian Sembakung, Nunukan

Abstract

Giant prawns (Macrobrachium rosenbergii) has high economic value with a price range between IDR. 40,000 to IDR. 75,000 that it was one of the main catches of fishing gear used by the society in Muara Tepian Sembakung. This research aims to analyze the growth model composition of giant prawns (M. rosenbergii) in Muara Tepian Sembakung, Nunukan. The objective was conducted for 5 months from October 2019 to February 2020. The research was designed by using quantitative descriptive with a case study approach. The determination of the study location was applied with a purposive random sampling method by following the fishermen who used the bottom fish pots catch. The sampling of giant prawns at Muara Tepian Sembakung was done by taking a survey method adhered to a fisherman with repetition as 10 times of sampling at a different time. The data of Giant prawns that were collected involved sex, total weight, and total length using a laboratory-scale method in the Laboratory of fisheries biology, Fisheries and marine science faculty, Universitas Borneo Tarakan. The research variable was the von Bertalanffy model and age structure of male and female giant prawns. The results obtained that the sex ratio of giant prawns (Macrobrachium rosenbergii) between males and females was 1: 1.83 with a percentage of a male was 35.33% and female was 78.6%. The growth of Von Bertalanffy model in getting the infinitive growth for male giant prawns was 24.185 cm at 132 days then T0 was-1.1088 and growth rate was 0.0877 cm/day with correlation value was 0.88431 (88.431% = very strong correlation) and female giant prawns amounted to 18.470 cm at 101 days whileT0 was-1.0734 days and the growth rate was 0.1019 cm/day with a correlation value was 0.90626 (90.626% = very strong correlation).