Kami menggunakan data harian sensor satelit Visible Infrared Imaging Radiometer Suite (VIIRS) Day/Night Band (DNB) untuk pemetaan distribusi kapal-kapal ikan yang menggunakan cahaya untuk operasi penangkapan ikan selama periode 2015-2017 di Laut Jawa. Tujuan dari penelitian ini adalah untuk menganalisis perbedaan distribusi kapal-kapal ikan yang menggunakan cahaya untuk operasi penangkapan ikan antara fase  bulan terang dan fase bulan gelap. Survei lapangan dilakukan untuk mengetahui jenis kapal ikan yang menggunakan cahaya lampu untuk operasi penangkapan ikan. Kami menganalisis perbedaan distribusi kapal penangkap ikan antara bulan terang dan bulan gelap di Laut Jawa. Hasil penelitian menunjukkan bahwa jumlah rata-rata kapal penangkap ikan menggunakan lampu untuk operasi penangkapan ikan di fase bulan terang badalah 230 unit sedangkan fase bulan gelap adalah 1.118 unit. Analisis statistik uji-t menunjukkan ada perbedaan yang signifikan secara statistik antara rata-rata jumlah kapal ikan pada fase bulan terang dan bulan gelap.

We analyzed the distribution of Purse seine fishing vessels using fishing lamps derived from the Day/Night Band Visible Infrared Imaging Radiometer Suite (DNB-VIIRS) sensor and Vessels Monitoring System (VMS) platform in the Java Sea. The data of fishing vessel distribution derived the DNB-VIIRS sensor and VMS platform was provided by NOAA Center for Environment Information and Global Fishing Watch respectively. The intensity of lights during the fishing operation was measured by a lux meter. The fishing vessel types that used light during fishing operations were small (< 15 units lamps) and large vessels (>15-unit lamps). The intensity of light in the big vessels (> 2,000 Lux) was higher than the small vessels (< 2,000 Lux). The average number of fishing vessels operating during the Southeast monsoon were more than those of the Northwest monsoon. The distribution of fishing vessels derived from the DNB-VIIRS sensor has a similar pattern with the VMS platform. Generally, the fishing vessels are concentrated along the southern coast of Borneo but in the Northwest monsoon shift towards the northwest of Java approaching the island of Sumatra.

Spatio-temporal analysis of yellow fin tuna fishing activity could give us new perception and perspective on studying this fisheries resource exploration. This study was carried out in Eastern Indian Ocean off Sumatera. Fishing data were collected between 2014 until 2018 from the hand line fishermen’s daily logbooks accessed from Bungus fishing port. Data were organized into a database and structured on a geographical reference to allow GIS-Based analysis. We performed raster calculator analysis and spatial statistical analysis to understand spatiotemporal distribution behaviour and fishing activity also employed the generalized additive model to understand the habitat preferences. The result of GIS-based analysis shows the dynamics of catch, effort and catch per unit effort distribution patterns, underlining the annual differences of geographical distribution and fishing pattern. The most concentrated fishing activity monitored in 2014 while the more dispersed fishing activity monitored in 2017. The geographic orientation of spatial distribution monitored at range between 72.90 degrees until 176.15 degrees. GIS provide an important and powerful tool to analyse fishing information to help decision makers in the EIO off Sumatera on Tuna management.

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.

Light fishing location obtained from visible infrared imaging radiometer suite (viirs) boat detection (VBD) and satellite-based oceanographic data of chlorophyll-a concentration (chl-a), sea-surface temperature (SST), salinity, and sea-surface height (SSH) were used to evaluate the distribution and characteristic of oceanographic conditions on the light fishing location in the Java Sea. The objectives of this study were to monitor the distribution of light fishing vessels from VBD and to evaluate the oceanographic characteristic on light fishing position. VBD data were prepared by national oceanic and atmospheric administration website and oceanographic data was provided by ocean color and copernicus marine environment monitoring service website. Overlaid process between light fishing position and oceanographic data was used to extract the oceanographic value in the light fishing location. The result showed most of light fishing occurred during southeast monsoon. In general, most of light fishing appeared in position of 107 - 114 °E and 4 - 5.30 °S. In addition, light fishing located in oceanographic condition for SST of 28.1 - 31.1 °C, chl-a of 0.26 - 0.60 mg/m3, salinity of 32 - 35.5 psu and SSH of 0. 5 - 0.62 m. The VBD data opens up a number of potential future applications for more computable fisheries data analysis.