DINAMIKA POPULASI DAN STATUS PENANGKAPAN IKAN BAUNG (Mystus nemurus C.V) DI WILAYAH HULU SUNGAI BARITO KALIMANTAN TENGAH, INDONESIA

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Erwin Rosadi
Safran Makmur
Subagdja Subagdja
Khoirul Fatah

Abstract

Keputusan pengelolaan perikanan harus didasarkan pada bukti-buktu ilmiah,diantara kelemahan pengelolaan perairan umum di dunia saat ini ialah terbatasnya informasi-informasi ilmiah dan tidak meratanya upaya-upaya konservasidi semua wilayahtropis. Tujuan penelitian ini adalah untuk mendapatkan data-data ilmiah tentang kajian dinamika populasi ikan Mystus nemurus (parameter pertumbuhan, rekrutmen, mortalitas, laju eksploitasi) dan status penangkapannya. Metode penelitian yang digunakan untuk parameter pertumbuhan ikan menggunakan metode von Bertalanffy, komposisi umur (kohort), rekrutmen di analisis dengan program FISAT II, estimasi nilai t0 berdasarkan model Pauly (1983), pendugaan mortalitas alami (M) berdasarkan model Pauly (1980), pendugaan mortalitas total (Z) berdasarkan model Beverton dan Holt (1996) dan status penangkapan dengan membandingkan ukuran panjang ikan pertama kali tertangkap (Lc) dengan pertama kali matang gonad (Lm) berdasarkan Sparre dan Venema (1999).Hasil penelitian menunjukkan Nilai parameter pertumbuhan ikan M. nemurus ialah K sebesar 0,8/tahun dan nilai L sebesar 28,35cmdan nilai t0 -0,08 tahun, persamaan pertumbuhan ikan metode Von Bertalanffy ialah Lt = 28,35{1-exp-0,8(t + 0,08)}, rekrutmen terjadi sepanjang tahun dan puncaknya terjadi pada bulan Juni, laju mortalitas total (Z) ikan sebesar 2,42/tahun, laju mortalitas alami (M) 1,59/tahun,laju mortalitas penangkapan (F) 0,83/tahun, laju eksploitasi (E) 0,34/tahun dan status penangkapan ikan M. nemurus di hulu sungai Barito tergolong growth overfishing.


 


A fisheries management decision must be based on scientific evidence, among the weaknesses of freshwater management in the world today are limited scientific information and unequal conservation efforts in all tropical regions.The purpose of this study was to obtain scientific data about the study of the dynamics population of the Mystus nemurus (growth parameters, recruitment, mortality, exploitation rate) and fishing status.The research method used for growth parameters used the von Bertalanffy method, age composition (cohort), recruitment was analyzed by the FISAT II program, estimated t0 value based on Pauly's (1983) model, estimation of natural mortality (M) based on Pauly's (1980) model, Estimation of total mortality (Z) based on the Beverton and Holt (1996) model and fishing status by comparing the Length at first capture (Lc) with Length at first mature  (Lm) based on the Sparre and Venema (1999). The results showed that the growth parameter value of M. nemurus was K of 0.8/year, L∞ value of 28.35 cm and a value of t0 -0.08 years, the equation for the growth of fish using the Von Bertalanffy method was Lt = 28.35 {1 -exp-0.8 (t + 0.08)}, recruitment occurs throughout the year and the peak occurs in June, the total mortality rate (Z) of fish is 2.42/year, the natural mortality rate (M) is 1.59/years, the fishing mortality rate (F) 0.83/year, the exploitation rate (E) 0.34/year and the fishing status of M. nemurus in Barito upstream are classified as growth overfishing.

Article Details

Section
Articles
Author Biography

Erwin Rosadi, Universitas Lambung Mangkurat

Fakultas Perikanan dan Kelautan Universitas Lambung Mangkurat

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