ABSTRAK
Laut Banda merupakan daerah penangkapan ikan tuna madidihang yangsangat intensif dan cenderung membahayakan kelestarian stok. Dalam rangkamenerapkan dasar pengelolaan yang efektif dan efisien, pada tahun 2011-2012telah dilakukan penelitian mengenai sumberdaya ikan tuna madidihang di LautBanda. Tujuan penelitian adalah untuk mengetahui kelimpahan, pertumbuhan,musim pemijahan dan daerah pemijahan. Metode pengumpulan data adalahmelalui observasi enumerasi harian terhadap aktivitas pancing ulur yang berbasisdi Banda Neira, survei eksploratori dan data sekunder dari instansi resmi.Kelimpahan ikan tuna madidihang secara temporal tertinggi terjadi pada MusimPeralihan II dan secara spasial tertinggi terjadi di Area Barat Laut dan AreaTenggara. Rekrutmen ikan tuna madidihang di Laut Banda terjadi bulan Februari.Pertumbuhan ikan tuna madidihang bersifat allometrik positif pada bulan Juni-Oktober dan allometrik negatif pada November-Mei, kegemukan tertinggi padabulan Juni dan terkurus pada bulan Januari, faktor kondisi terbesar terjadi padaMusim Barat dan terkecil pada Musim Peralihan II. Puncak musim pemijahanikan tuna madidihang di Laut Banda berlangsung bulan Oktober sampai denganDesember. Konsentrasi daerah pemijahan ikan tuna madidihang di Area BaratLaut dan Tenggara.

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ABSTRACT
Banda Sea is an area of yellowfin tuna fishing ground which is veryintense and likely to endanger the sustainability of the stock. In order toimplement the basic of management which effective and efficient, in 2011-2012have done research on yellowfin tuna resources in the Banda Sea. The purpose ofthe study is to determine the abundance, the growth, the spawning season andspawning ground. The data collection methods is through; observationenumeration stretching daily to fishing activities which based in Banda Neira,exploratory survey and secondary data from official agencies. The highesttemporal abundance of yellowfin tuna occurs in Transitional Seasons II and thehighest spatial occurred in Northwest and Southeast Areas. Recruitment ofyellowfin tuna in the Banda Sea occurred in February. Growth of yellowfin tuna ispositively allometric in June to October and negatively allometric in November toMay, the highest obesity in June and the thinnest in January. the biggest conditonfactor occurs in the Western Season and the smallest in the Transitional SeasonsII. Peak spawning season of yellowfin tuna in the Banda Sea occurs in Octoberthrough December. The concentration of yellowfin tuna spawning ground was inthe Northwest and Southeast Areas.