Flying fish (Exocoetidae) is one important small pelagic fisheries commodity in border areas of Indonesia and Timor Leste. However, the data of population parameters in Ombai Strait are not yet known, which is important to inform unit stock management and sustainable fisheries. This study aimed to provide information about growth and mortality parameters, recruitment pattern, and exploitation rate of flying fish. Data collection was carried out during May 2018-June 2019 by measuring and observing the flying fish landed at the fish landing sites in Belu Indonesia and Bobonaro Timor Leste. Data analysis used the FAO-ICLARM Stock Assessment Tools (FiSAT) program. The results showed that the asymptotic length (L∞) was 330.5 mm, growth constant (K) was 0.99 per year, and growth performance indices (Φ) was 0.50. The natural mortality (M) was 0.92 per year, fishing mortality (F) was 0.12 per year, and total mortality (Z) was 1.04 per year. The highest recruitment occurs in May to September with peak season in June (14.82%) and September (15.16%). Exploitation rate (E) flying fish in the border area of Indonesia and Timor Leste in Ombai Strait is relatively low about 0.11 and still at a rational and sustainable utilization range (E < 0.5).

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Study on small-pelagic fisheries in the border regions between Indonesia - Timor Leste has taken place in Belu District, East Nusa Tenggara. It was aimed to assess the status of small pelagic management and formulate the strategic and tactical steps for implementing sustainable fisheries management. The study site took place at four villages at the sub-district of Tasifeto Timur and Kakuluk Mesak. Data were collected through interview techniques, observation, and measurement of 30 indicators from six domains of EAFM, ecosystem approach to fisheries management, of which assessment of each indicator within each domain was conducted and presented into the flag model.  Based on that results, tactical decisions and strategic planning were formulated. The results showed that small-pelagic fisheries management in Belu classified as a fairly medium category. Domain fish resources and fishing technology classified as a good category and domain habitat and ecosystem, social, economic and institution are classified as a medium category. To improve small-pelagic fisheries management in Belu District, several indicators are recommended for improvement in form of tactical and strategic management decisions