Preliminary Assessment of Deep Sea Fisheries Resources Along the Continental Slopes of Lingayen Gulf, Philippines
Rafael V. Ramiscal, Supervising Aquaculturist, BFAR
Alma C. Dickson, Center Chief, NMFDC, BFAR
Jonathan O. Dickson, Chief Aquaculturist, CFTD, BFAR
Robin Escriba, Joeren Ylleana, Che-che Salcepuedes,
Rhoda Servidad, Jennifer Viron, Roger Fortaliza and Riczyneth Ampoyos;
Researchers, MV DA-BFAR
Deep sea fisheries survey was conducted along the continental slopes of Lingayen Gulf on May 11-26, 2008 using beam trawl and traps to determine composition and abundance of species that are important to fisheries. Among the crustaceans, pandalid shrimps were found dominant and perhaps the most significant to fisheries mainly Heterocarpus dorsalis, H. woodmasoni, H. hayashii and H. laevigatus that were caught at sampling depths between 200m to 800m but was most abundant at 400-600m. Using swept area method, the catch-per-unit-area (CPUA) and biomass based on beam trawl tows were computed according to depth range for various species groups including crustaceans (shrimps & pandalid shrimps) and fish (fam. Macrouridae & Colocongridae). The CPUA for fish and crustaceans particularly pandalid shrimps was highest at 400-600m. The total biomass for fish and crustaceans was estimated to be about 819 tons which include about 46.26 tons of pandalid shrimps in an area of about 2567 km2 with depths between 200m-1500m that is located at the entrance of Lingayen Gulf. Embarking on a fishery based on above deep sea species should be done carefully following thorough feasibility and assessment studies.