The Indo‐Australian Basin (IAB) constitutes a crucial water route for the global ocean's circulation between the Pacific and Indian Oceans. Locally generated eddies contribute to the continued westward transport of water away from the IAB. In this paper, results from the first comprehensive regional ocean eddy census are discussed. A hybrid eddy census and tracking algorithm is used to analyze satellite altimetry data from 1993 to 2018. A total of 2,792 eddies were identified and tracked. Cyclonic eddies and anticyclonic eddies exhibit geographical segregation in terms of their dynamic characteristics. Larger amplitudes, radii, and absolute vorticities are associated with high eddy kinetic energy regions located in the vicinity of the South Java Current, South Equatorial Current, and Indonesian Throughflow. The eddies are grouped into three duration‐based classifications providing the first systematic insight into understanding their physical characteristics, formation, and distribution in the IAB.

Due to rapid urban development in the coastal area of the East Aceh Regency, water quality degradation and marine pollution issues become the primary concern in this region. Moreover, seasonal observation of water quality and phytoplankton has yet to be assessed. This study aimed to determine the...

Beach sand mining caused externalities. Externalities are negative impact caused extraction excessive. Road damage, decreasing of fisheries production, and destruction of mangrove forest ecosystems in coastal areas. The government has appeal for the prohibition of sand mining, but extraction still happening. This study aims to assess the policy strategy to overcome beach sand mining throughmotivation and perception of community using SWOT analysis;estimation of actual production costs and estimation of real production of traditional sand mining using descriptive quantitative. The result showed that motivation of community selling sand for economic demands, does not need to work hard, the production are stable and high prices than agriculture activity. They consider selling sand is a side job. If there is no demand for sand, then the community will be doing another job like hunting, fishery and agriculture activity. The community aware negative impact of sand mining and its knowledge become strength effect to a prevention of sand mining. Low enforcement of Government and tribe policies. Real data production of excessive extraction three times higher than government data according to sand mining permit. Meanwhile, all sales sand has no permit. The profit margin for sales agent sand Rp543.111,00/ret while community received Rp250,000.00/ret. Price proposed by internalizing the externalities for sand mining is Rp391.924,00/m3.

Development of the region by Minapolitan approach as a fisheries development concept cannot be applied partially but should be holistic developed by developing all the availability in cities to the rural areas. This study aims to understand the structure and pattern of regional economic growth and to find out the potency and competitiveness of the area as a priority for fisheries development center in Gorontalo Province. This study uses Klassen and Shift-Share (S-S) typology analysis. Area that has the better economic structure is Pohuwato Regency. This region has Gross Regional Domestic Bruto (GRDB) per capita above the provincial value, however economic development still below the provincial level (high income but low growth) or categorized as developed region but stressed category. Boalemo Regency, Pohuwato Regency and Bone Bolango Regency have almost equal fishery development value, which are 18.6%, 16.2% and 12.7% respectively. Gorontalo Regency grow only as large as 7.4 %. This is inseparable from the production of fishery sub-sector in Gorontalo Regency that only share 8% to the fisheries production.Development of the region by Minapolitan approach as a fisheries development concept cannot be applied partially but should be holistic developed by developing all the availability in cities to the rural areas. This study aims to understand the structure and pattern of regional economic growth and to find out the potency and competitiveness of the area as a priority for fisheries development center in Gorontalo Province. This study uses Klassen and Shift-Share (S-S) typology analysis. Area that has the better economic structure is Pohuwato Regency. This region has Gross Regional Domestic Bruto (GRDB) per capita above the provincial value, however economic development still below the provincial level (high income but low growth) or categorized as developed region but stressed category. Boalemo Regency, Pohuwato Regency and Bone Bolango Regency have almost equal fishery development value, which are 18.6%, 16.2% and 12.7% respectively. Gorontalo Regency grow only as large as 7.4 %. This is inseparable from the production of fishery sub-sector in Gorontalo Regency that only share 8% to the fisheries production.

Mangrove ecosystems play a pivotal role in climate change mitigation due to their exceptional carbon sequestration capacity and the vital ecosystem services they provide. This study examines changes in mangrove cover and estimates carbon stocks on Gilibakau Island, Saleh Bay, Indonesia, utilizing Pleiades satellite imagery and drone-derived data. Analysis of Pleiades imagery from 2020 and 2022 identified an increase in mangrove area from 6.53 hectares to 6.71 hectares, attributed primarily to rehabilitation initiatives, including replanting programs. Biomass was quantified using drone-based data collected in 2024, employing a tree height-based allometric model. The estimated biomass ranged from 23.63 to 192.69 tonnes per hectare, reflecting the high-density mangrove cover and its significant carbon storage potential. Regression analysis revealed a strong correlation (R² = 0.863) between Normalized Difference Vegetation Index (NDVI) values and biomass, validating NDVI as an effective proxy for mangrove biomass estimation.