Individual assignment and mixed-stock analysis of short mackerel (Rastrelliger brachysoma) in the Inner and Eastern Gulf of Thailand: Contrast migratory behavior among the fishery stocks

作者: Sirithorn Kongseng , Ratanavaree Phoonsawat , Akarapong Swatdipong

DOI: 10.1016/J.FISHRES.2019.105372

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摘要: Abstract Short mackerel (Rastrelliger brachysoma) is a pelagic-neritic and the most economically important fish in Thailand with value reached 190 M USD 2013. The short however classified as data deficient IUCN Red List. In particular, resource Gulf of recently drastically decreased due to overfishing. this study, we applied individual assignment (IA) mixed-stock analysis (MSA) based on microsatellite loci fishery catches Inner Eastern Thailand. We found contrast migratory behavior among stocks. majority (55.51%) fully grown caught from was sedentary fishing area, Samut Songkhram spawning ground. contrast, almost all (85.58%) were migrant Southern Thailand, Pattani ground (>600 km migration distance). This information strongly indicated that distinct management strategies are required sustain two large areas. seasonal closure significant grounds mackerel, including limit number vessels ban destructive gears highly recommended for

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