Komposisi Jenis, Hasil Tangkapan Per Upaya, Musim Dan Daerah Penangkapan Ikan Hiu Di Perairan Samudera Hindia Selatan Jawa

Abstract

Penangkapan hiu di Indonesia setiap tahun meningkat jumlahnya sehingga diperlukan penelitian agar pemanfaatannya lestari. Penelitian ini bertujuan mengkaji komposisi jenis, hasil tangkapan per upaya, musim dan daerah penangkapan ikan hiu. Penelitian dilaksanakan pada tahun 2015-2016 di Pelabuhan Perikanan Samudera Cilacap, Jawa Tengah. Penelitian dilakukan dengan metode survey dan pengumpulan data bulanan dibantu oleh enumerator. Hasil penelitian menunjukkan komposisi jenis ikan hiu yang tertangkap di perairan Samudera Hindia, Selatan Jawa dan didaratkan di PPS Cilacap didominasi oleh hiu tikusan (A. pelagicus) 32,69%, hiu paitan (A. superciliosus) 20,21%, hiu slendang (P. glauca) 11,25%, hiu gabel (H. lemures) 7,55% dan hiu lanjaman (C. falciformis) 6,14%. Hasil tangkapan per upaya (CPUE) ikan hiu mengalami peningkatan sebanyak 57% selama 6 tahun terakhir (2011-2016) dengan puncak musim penangkapan ikan hiu terjadi pada Juli dan Nopember.Sharks was the Elasmobranchii class which means cartilaginous fish. The number of sharks in Indonesia was increasing every year, so monitoring was needed to ensure sustainable utilization. This study was aims to assess the species composition, catch per unit of effort, season and fishing ground of shark. The study was conducted in 2015-2016 at the Cilacap Oceans Fishing Port, Central Java. Research methods were conducted by survey method and montly data collection by enumerator. The dominant fish biology observation included measurement of the fork length. The results showed that the shark catches composition were dominated by A. pelagicus (32.69%), A. superciliosus (20.21%), P. glauca (11.25%), H. lemures (7.55%) and C. falciformis (6.14%). Catch per unit of effort trends tended to increase as much as 57% from 2011 to 2016. The peak season of fishing occurs in July and November.

Fish behavior based on the effect of variations in oceanographic condition variations in FADs Area of Bone Bay Waters, Sulawesi, Indonesia

“…Then their presence is relatively strongly influenced by the strength or weakness of the current speed. Research (Priatna et al 2010) reveals that the aggregation pattern of small pelagic fish tends to be in front of FADs against currents, so understanding this can make it easier to catch fish. A flock movement of schooling of fish will rather ease to catch fish than fish that move with irregular movement pattern.…”

“…This is similar to the findings (Doray et al 2007), monitoring of fish schooling in FAD areas using echo-sounding techniques, underwater cameras and fishing to assess the aggregation structure of fish during the day showed that small pelagic fish with a FL size of 12 cm was at a depth of 10-30 meters. Then FL fish with a size of 30 meters were caught at a depth of 0-20 meters, whereas according to (Priatna et al 2010), the highest density in the FAD area was found in the surface layer to a depth of 25 m and (Taquet 2004), from a few small individual fishes located just below the FAD visually observed by diver range 0 to 30 meters, maximum 50 meters.…”

“…General description related to the distribution of fish species around FADs has been studied for several years, such as the certain location of depth, especially tuna (Forget et al 2015;Matsumoto et al 2016;Lopez et al 2017a) and the distribution of fish due to the parameters, such as the angle of the current direction on FADs (Rountree 1990;Dempster and Kingsford 2003), current velocity to the distance of tuna fish (Auxis thazard) (Priatna et al 2010) and Bigeye Scad (Selar crumenophthalmus) (Capello et al 2013). However, it is also important to understand the distribution of fish schooling movements based on the variations in current velocity condition, current direction, and temporally different temperature levels at a different time in species mackerel Scad (Decapterus russelli), which is dominantly caught in the waters of Bone Bay (Irawati et al 2021).…”

Conservation Status of Marine Biota Sold in Restaurants in Pangandaran Regency, West Java

“…The high consumer interest in fish makes fishermen catch large numbers continuously, regardless of their conservation status (Nugraha et al, 2020;Rizal et al, 2017). Many protected fish species are still caught by fishermen and then distributed to restaurants around the coast, especially sharks (Permana & Kusuma Pringgo, 2020;Prihatiningsih & Chodriyah, 2019). Therefore, this study aims to identify the conservation status of marine biota sold in restaurants in Pangandaran Regency.…”