KOMPOSISI HASIL TANGKAPAN PERIKANAN PAYANG DAN BAGAN TANCAP SEBELUM REKLAMASI TELUK JAKARTA (GIANT SEA WALL)

Payang merupakan alat tangkap dengan laju tangkap relatif tinggi di Teluk Jakarta, sedangkan bagan tancap dikenal kurang selektif karena hasil tangkapannya didominasi oleh ikan berukuran kecil baik jenis pelagis maupun demersal. Penelitian ini dilaksanakan dengan metode fishing experiment pada payang dan bagan tancap. Hasil penelitian menunjukkan bahwa hasil tangkapan payang dan bagan tancap didominasi oleh jenis ikan demersal namun proporsi tangkapannya tidak jauh berbeda dengan jenis ikan pelagis. Komposisi ikan hasil tangkapan payang pada Agustus dan Oktober didominasi oleh jenis ikan pelagis, sedangkan pada bulan Desember didominasi oleh jenis ikan demersal. Nilai laju tangkap payang untuk jenis ikan pelagis ditemukan tinggi pada Agustus dan Oktober disebabkan oleh dominasi ikan cekong (Sardinella lemuru) dalam jumlah besar. Komposisi ikan hasil tangkapan bagan tancap pada Mei didominasi oleh jenis ikan demersal, sedangkan pada Oktober didominasi oleh jenis ikan pelagis. Daerah penangkapan payang meliputi perairan Pulau Damar, Pulau Bendera, Muara Pecah, Muara Angke, Pulau Onrust, Pulau Putri, Kronjo, sedangkan daerah penangkapan bagan tancap terkonsentrasi di sebelah barat perairan Teluk Jakarta, sekitar Pulau Kayangan, Pulau Bidadari dan Pulau Onrust. ABSTRACT Payang, a mini danish seine, is an artisanal fishing gear that has high catchability rate. Like payang, another dominant fishing gear in Jakarta Bay, the lift net, is also known as unselective fishing gear since small fish dominate its catch. This research uses the fishing experiment method with payang and lift net to figure out the gears' catch composition and catch rate. The result shows both fishing gears predominately caught the demersal fish group, but its proportion does not much from the pelagic group. During August and October, the catch composition of payang was dominated by pelagic fish, while demersal fish was caught mostly in December. The high catch rate for pelagic fish was recorded in August and October since cekong fish (Sardinella lemuru) dominated the cath. The catch composition of lift net was dominated by demersal fish during May, while pelagic fish were mostly captured in October. Payang’s fishing ground includes Pulau Damar waters, Pulau Bendera, Muara Pecah, Muara Angke, Pulau Onrust, Pulau Putri, and Kronjo, while the lift net dominates the western part of part of Jakarta Bay including Pulau Kayangan, Pulau Bidadari, and Pulau Onrust.

Biology and Management of Dogfish Sharks

Abstract.—Following intense harvests by distant-water fleets before 1975, populations of spiny dogfish Squalus acanthias in the Northwest Atlantic increased steadily in abundance during the mid-1970s and 1980s. Peak abundance in the early 1990s was short-lived as the United States commercial fleet began a large-scale fishery on mature female dogfish. Between 1989 and 1999, approximately 250,000 metric tons of female spawning stock was removed, reducing the stock to about 30% of B_MSY levels. Abundance of male dogfish, however, was relatively unaffected by the fishery. The average size of mature female dogfish declined by more than 10 cm and the average length of juveniles declined as well. Recruitment during 1997 to 2003 was the lowest in the 1968–2006 time series. Recruitment in 2006 was low despite a very high catch rate of mature females in the spring survey by the Northeast Fisheries Science Center. The ratio of mature male to females increased from about 2:1 prior to the directed fishery to about 7:1 by 2001.