The Mapur waters contain various kinds of fish caught in one of them is Yellow and blueback fusilier. Yellow and blueback fusilier is one of the catches of high economic vulued. High economic value can certainly boost the Yellow and blueback fusilier and can affect the population. The research was conducted from August 2018 to July 2019 at this fish landing on Kelong Village. The tools used are stationery, cameras and materials used are fish as a research object. The aims of this research was to determine the Maximume Sustainable Yield (MSY), rate and effort of utilization, and the amount allowed to catch (JTB) of Yellow and blueback fusilier in Mapur waters landing this on Kelong Village. This research used survey method with primary data retrieval using live fishermen interviews and secondary data consists of document or literature that supports the research. The result of this research is the potential value of MSY is 787,067 kg/unit whit the optimum effort (f opt) 1.280 unit/ month not over the limit in other words yet overfishing. The utilization rate of Yellow and blueback fusilier 42% medium level overall, and so if increased efforts are still possible to optimize the haul, but still controlled. And amount allowed to catch value Yellow and blueback fusilier is 629.65 kg/unit, that Yellow and blueback fusilier can still be improved for optimal results, but not beyond the determined limits.

Yellowtail scad fish was an economic value fish that many fishermen in Kelong Village catch. One of fishing ground in Bintan was Merapas Waters. Fishing activities without considering fish stocks in nature will caused overfishing. The objective of this research was to determine the Maximum Sustainable Yield (MSY), rate and effort of utilization, and Total Allowed Catch (TAC) of Yellowtail Scad fish in Merapas waters landed on Kelong Village. The fishing gear that Fishermen in Kelong Village used to catch Yellowtail Scad fish was hand line. This research used survey method. Primary data from this research were catch and effort of Yellowtail Scad Fish, while secondary data obtained from fishermen interviews and related literature. Data analysis of this research used Schaefer method. The result of this research was the potential value of MSY is 2,501.37 kg/month with the optimum effort (f opt) 178 trip. The utilization rate of Yellowtail Scad fish was 38.48% and effort rate of Yellowtail Scad fish was 22.16%. Total allowed catch value of Yellowtail Scad fish was 2,001.1 kg. Overall, the catch of Yellowtail Scad Fish hasn’t reach overfishing, so the fishing effort can be more optimized.

The study was conducted in December 2016 to February 2017 in East Halmahera waters with the aim to examine the relationship between the length of weight and potential and the level of utilization of tuna. The results showed that the long frequency distribution of tuna was ranging from 10.0-28.2 cm, with a maximum length value of 29.93 cm, a growth coefficient of 0.74 per month and a measure of fish worth catching for spawning. The relationship between the weight of tuna in East Halmahera waters is W=0.0078L^3.2982, where the length of tuna is greater than this weight increase due to environmental conditions and oceanographic parameters that affect the growth of tuna. The results of the MSY analysis or the sustainable resource potential of tuna in East Halmahera waters using the Fox method, found that the MSY value or sustainable potential of tuna was 4,176.54, with a maximum effort level of 8,047 Trips. This utilization rate is still low from the value of MSY and continues to decline this is due to the low value of fishing efforts.

Mapur waters is one of the potential areas for demersal fish distribution in Bintan waters. The purpose of this study was to investigate the effort of catching painted sweetlips fish (Diagramma pictum), Maximum Sustainable Yield of Painted Sweetlips Fish and investigated the amount of Painted Sweetlips Fish catches allowed (JTB). The research method used is the survey method, which is direct observation at the research location by recording fishing operations such as fishing gear and catches through direct interviews with fishermen working in fish storage warehouses. Data taken in the form of primary data and secondary data. The results showed that the effort of catching Painted Sweetlips Fish on Mapur waters was 314.00 units, with the MSY value was 713,016 kg/unit. So that the amount of catch allowed (JTB) is 80% from MSY which is equal to 570.41 kg/unit, with the utilization rate of Painted Sweetlips Fish on which is equal to 89%.