STATUS BIOLOGI RAJUNGAN (Portunus pelagicus Linnaeus, 1758) DI PESISIR KABUPATEN PANGKAJENE DAN KEPULAUAN, SULAWESI SELATAN. (Indonesian)

Pangkajene dan Kepulauan regency are one of the blue swimming crabs fishing center and processing located in South Sulawesi. This research is conducted to analyze the biological aspect and the usage status of blue swimming crab (Portunus pelagicus) on the coast of Pangkajene dan Kepulauan regency. Data collection used a survey method by conducting interviews with fishermen, observing research sites and measuring crabs directly in the field. Samplings were obtained twice a month from November 2018 to April 2019. 7200 Portunus crabs from the fisherman were randomly selected to measure the size and the weight which consists of 3900 male and 3300 female crabs from different districts were Pangkajene, Bungoro, Labakkang, Ma’rang, Segeri, and Mandalle. The measurement result are then analyzed using Microsoft Excel program and ELEFAN I method in FISAT II program. The result showed that the maximum age of blue swimming crab predicted can reach 4 years, with the natural mortality (M) of Portunus male crabs is 0.67 and female crabs 0.82 per year then fishing mortality (F) is 3.54 and 4.12 per year. The total mortality (Z) is 4.20 and 4.94 per year with the exploitation rate (E) around 0.84 and 0.83. Therefore, based on the system dynamics model of non-equilibrium fish biomass resulted that the biology status of blue swimming crabs on Pangkep regency has reached the overfishing condition. [ABSTRACT FROM AUTHOR]

Kabupaten Pangkajene dan Kepulauan (Pangkep) merupakan salah satu daerah yang menjadi sentra penangkapan dan pengolahan rajungan di Sulawesi Selatan. Penelitian ini bertujuan untuk mengkaji aspek biologi serta status pemanfaatan rajungan (Portunus pelagicus) yang tertangkap di pesisir Kabupaten Pangkep. Pengumpulan data menggunakan metode survei dengan melakukan wawancara terhadap nelayan, observasi ke lokasi penelitian dan pengukuran rajungan secara langsung di lapangan. Pengambilan sampel dilakukan dua kali dalam tiap bulan sejak bulan November 2018 hingga bulan April 2019. Sebanyak 7200 ekor sampel hasil tangkapan nelayan diambil secara acak dan dilakukan pengukuran lebar dan bobot yang terdiri dari 3900 ekor jantan dan 3300 ekor betina yaitu dari Kecamatan Pangkajene, Bungoro, Labakkang, Ma’rang, Segeri, serta Mandalle. Hasil pengukuran kemudian dianalisis menggunakan perangkat lunak Microsoft Excel dan metode ELEFAN I pada program FISAT II. Hasil analisis menunjukkan umur maksimal rajungan diduga mencapai empat tahun. Mortalitas alami (M) rajungan jantan dan betina masingmasing sebesar 0,67 dan 0,82/tahun, mortalitas penangkapan (F) 3,54 dan 4,12/tahun, mortalitas total (Z) 4,20 dan 4,94/tahun. Laju eksploitasi (E) sebesar 0,84 dan 0,83. Hasil pendekatan model dinamika biomassa ikan non equilibrium menunjukkan status biologi rajungan di Kabupaten Pangkep telah berada pada posisi overfishing. [ABSTRACT FROM AUTHOR]

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