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"ABSTRACTMercury and arsenic are considered to be among the most toxic metals and have been associated with serious adverse health effects. These two trace metals and other contaminants that are found in fish products are therefore of public concern for food safety reasons. Hence, we selected three marine species to study i.e., yellow fin tuna, marlin and green mussels because of their economic values in the international and local markets. The objective of our study was to determine the arsenic and mercury content in these three marine species as a first step in monitoring metal content in seafood products. The tissue samples of tuna and marlin were collected from the Jakarta Fishing Port, while the green mussels was collected from aqua culture sites in Jakarta Bay. The metal content was determined by ICP MS and validated using CRM DORM Z and DORM 3. The speciation of arsenic (organic and inorganic forms) was determined using HPLC ICPMS. All measurements were based on dry weight samples. The result showed that the mercury concentration in yellow fin tuna, marlin and green mussel samples was 0.68 :1: 0.08 mg kg", 0.56 :1: 0.06 mg kg"and 1.51 :t 0.10 mg kg, respectively. The total arsenic concentration in yellow fin tuna, marlin and green mussel samples was 3.47 i 0.21 mg kg, 2.71 i 0.18 mg kg, and 6.77 :t 0.32 mg kg, respectively. The mercury content in the fish tissue was below the maximum allowable concentration (National Standard of Indonesia 1.0 mg kg), except for the green mussels. For total arsenic concentration, all the samples were above the national standard concentration (1.0 mg kg). The organic arsenic species arsentobetaine (AB) found in tuna and marlin fish samples was not toxic. Inorganic and organic arsenic was found in the green mussel samples. Our results suggest that there is a need to establish a national program to regularly monitor the content of selected trace metals in fishery products."

"ABSTRAKLaut 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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ABSTRACTBanda 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."