Proponent/Claimant
Abstract
Spiny lobster resource assessment was conducted in Eastern Visayas, Philippines from 2018 to 2019. Lobster catch was predominantly composed of Panulirus penicillatus (62%), followed by P. longipes and P. ornatus (18%) while, P. versicolor contributed negligible abundance (2%). Lobster peak season occurs from March-May coinciding summer months. Compressor diving that targets live lobsters dominates the fishery (82%), while a few came from gillnet (14%) and traps fishery (4%). Live lobsters contributed 70% of the total catch. Harvest estimates were 4300kg for 2018 and 6200kg for 2019. CPUE declined significantly from 0.75 to 0.32kg/fisher/day. Lobster catch mean sizes in carapace lenght were 50mm for P. penicillatus and P. longipes ; 60mm for P. versicolor; and 155mm for P. ornatus . P. penicillatus (E=0.7-0.8) and P. ornatus (E=0.7) were the most highly exploited species. Extrapolation on catch sizes showed huge proportion of catches were juvenile and undersized lobsters except for P. ornatus. Recruitment pattern has a bimodal distribution with strong pulse of recruitment occurring in the 1st and 4th quarter of the year. Yield-per-recruit (Y’PR) analysis indicated non-maximization of potential yield for all species, except P. ornatus. The analysis suggests introduction of minimum legal size with annual increments to realize optimal yield which can be attained from 3 to 9 years. This will lessen growth overfishing and mitigate adverse economic impacts since the fishery highly depends on undersized lobsters. Reduction of exploitation levels may be achieved by reinforced banning of compressor diving and strong restriction on catching ovigerous females.