Distribution of fishing boats and its oceanography characteristic in the eastern Indian Ocean off Sumatera

Abstract

Understanding fishing boats locations and its oceanographic feature were significantly important. The objectives of this study were to characterize the dissemination of fishing boats and evaluate the characteristic of oceanographic conditions on the fishing boats in the eastern Indian Ocean off Sumatera (EIOS). The data of fishing boats derived vessel monitoring system (VMS) and visible infrared imaging radiometer suite (VIIRS) boat detection (VBD) data were provided by Ministry of Maritime Affairs (MMA). Satellite-based oceanographic data of chlorophyll-a concentration (chl-a), sea-surface temperature (SST), and salinity were obtained from NOAA national centers for environmental information website. The results showed the number of fishing vessel that operated during east monsoon was higher than others monsoon. The results also showed that the spatial dispersion of VBD data was wider than VMS data. Most of the fishing boats appeared in position of 95 °E – 100 °E and 2.30 °S – 2.30 °N. In addition, most of fishing boats detected in oceanographic condition for SST of 29 – 31 °C, chl-a of 0.1 – 0.3 mg/m3, salinity of 32 – 33 psu.