Pendugaan Stok, Potensi Keberlanjutan dan Pengelolaan Kepiting Bakau Ungu (Scylla tranquebarica) di Perairan Indragiri Hilir

Abstract

Permintaan pasar untuk komoditas perikanan kepiting bakau yang terus meningkat telah mendorong eksploitasi berlebih sehingga mengancam kelestariannya di alam. Penelitian ini bertujuan untuk menghitung stok, potensi keberlanjutan, dan saran pengelolaan sumber daya kepiting bakau ungu (Scylla tranquebarica) di wilayah perairan Indragiri Hilir. Penelitian ini menggunakan data sekunder yaitu data harian enumerator nelayan kepiting bakau dari tanggal 15 Desember 2021 hingga 6 Januari 2023. Data dianalisis dengan metode LB-SPR dengan SPR Package pada R-Studio. Hasil analisis menunjukkan SPR kepiting bakau ungu jantan sebesar 41%, nilai selektivitas (SW50) lebih dari nilai matang gonad (CWm), F/M sebesar 1,21, laju eksploitasi sebesar 0,55 per tahun dengan nilai yield belum melebihi batas optimum yang mengindikasikan under fishing. SPR kepiting bakau ungu betina sebesar 25%, nilai selektivitas (SW50) kurang dari nilai matang gonad (CWm), F/M sebesar 1,68, laju eksploitasi sebesar 0,63 per tahun dengan nilai yield telah melebihi batas optimum yang mengindikasikan over fishing.

The increasing demand for mud crab commodities has triggered over- exploitation that potentially threat its sustainability in nature. This study aims to estimate stock, sustainability potency, and management suggestions for purple mud crab (Scylla tranquebarica) in Indragiri Hilir waters. This study used secondary series data of daily data from mud crab fishers enumerators from December 15, 2021 to January 6, 2023. Data were analysed using the LB-SPR method with the SPR package on R-Studio. The results showed that the SPR of male purple mud crab was 41%, selectivity (SW50) was more than carapace width maturity (CWm), F/M was 1.21, the exploitation rate was 0.55 per year with a yield value that has not exceeded the optimum limit under fishing. SPR of female purple mud crab was 25%, selectivity (SW50) was less than carapace width maturity (CWm), F/M was 1.68, the exploitation rate was 0.63 per year with a yield value that has exceeded the optimum limit indicating over fishing.