Prediction of demersal fishing ground associated with coral reefs in the coastal Jepara Regency, Central Java, Indonesia based on Sentinel 2A imagery

Abstract

Map of prediction of fishing ground that already exists in Indonesia issued by the Bali Marine Research and Observation Center (BPOL) and the National Aeronautics and Space Agency (LAPAN) of Jakarta, there are still many weaknesses including the spatial aspect of the point of forecasting far from the coast and the unclear type of fish predicted. The lack of understanding of the type of fish predicted, the risk of fishermen carrying the wrong fishing gear so that when reaching the forecasting location, fishermen can not catch fish that are abundant. The method of determining fishing ground for demersal fisheries is carried out in three stages, first step, environmental tabulation of demersal fisheries, the second stage of mapping corals area and its supporting parameters, the third stage of mapping the demersal fishing ground. The results of the study obtained several statements, namely demersal fishing ground can be made based on an understanding of childhood fish habitat, adulthood, substrate base habitat, an optimum depth of catchment area. Sentinel 2A satellite imagery can be used to help determine the fishing ground of demersal fish species, but for the coastal waters of Jepara Regency, there are still obstacles related to spatial resolution and water turbidity. Field data is still needed to help determine the demersal fishing ground. Based on the fishing ground mapping, there are four economical types of fishery resources that live in the coral reef environment, namely Lobster, Red Snappers, Blue Line Seabass and Leopard Coral Grouper. The demersal fishing ground associated with corals in the Coastal Jepara Regency Waters which is seven segments apparently only four segments have the potential to become demersal fishing ground associated with coral reefs, namely the second to fourth segments, including the coastal waters of Jepara, Mlonggo, Bangsri, and Kembang. District and the most potential is the coastal waters of the Mlonggo District.