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Peningkatan permintaan kepiting bakau (Scylla serrata) di Kepulauan Aru memacu peningkatan upaya penangkapannya. Untuk mendapatkan informasi terkini tentang dinamika populasi dan tingkat pemanfaatan kepiting bakau di perairan Kepulauan Aru, maka dilakukan penelitian selama 2 (dua) tahun yaitu Maret - Desember 2017 dan 2018 dengan pengamatan langsung di pengumpul kepiting. Hasil penelitian menunjukkan bahwa ukuran lebar karapas pertama kali tertangkap (CWc) adalah 148,6 mm. Pola pertumbuhan kepiting bakau bersifat allometrik negatif dengan nisbah kelamin jantan dan betina tidak seimbang. Laju pertumbuhan (K) adalah 0,7 per tahun dengan tingkat kematian alamiah (M=0,84) lebih tinggi daripada kematian karena penangkapan (F=0,78). Tingkat pemanfaatan (E) sebesar 0,48 menunjukan bahwa tingkat pemanfaatan sumberdaya kepiting dalam kategori moderat. Upaya pelestarian sumberdaya kepiting dapat dilakukan melalui peningkatan kepatuhan masyarakat terhadap peraturan tentang batas ukuran lebar karapas minimum yang boleh ditangkap (150 mm) dan menjaga kelestarian hutan mangrove.  Increased demand for mud crab (Scylla serrata) in the Kepuluan Aru spurred an increase in fishing efforts. To determine population dynamics and current exploitation level of mud crab in these area, research was conducted for 2 (two) years, March to December 2017 and 2018. The results showed that carapace width at first capture (CWc) of mud crab was 148,6 mm. The growth pattern of the species was allometric negative with an unbalanced sex ratio between males and females. The growth rates (K) was estimted at 0.7 per year with natural mortality rates (M=0,84) more higher than fishing mortality rates (F=78). The exploitation level (E) was 0.48, indicating that the catch was in a sustainable condition. Efforts to maintain sustainability of mud crab resources can be done by increasing community compliance with regulations of the minimum size limit of mud crabs that can be caught (150 mmCW) and preserving mangrove forests.

DINAMIKA POPULASI DAN TINGKAT PEMANFAATAN KEPITING BAKAU (Scylla serrata Forskal, 1775) DI PERAIRAN KEPULAUAN ARU DAN SEKITARNYA, MALUKU