IUCN threat status:

Data Deficient (DD)

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Biology

Males undergo upriver migration at 3-4 years while females at 4-5. Migration commences when temperature reaches 14-18°C, mainly in May and spawning begins when temperature rises over 20°C in May-June. Spawning occurs close to estuaries in fresh and brackish water. Spent individuals move back to the sea, where many of them die after spawning. Juveniles mostly migrate to river mouth in first summer and stay at sea until they reach maturity. When at the sea, they feed mainly on crustaceans and small fishes. In freshwater, adults do not feed and juveniles takes planktonic crustaceans as food (Ref. 59043).

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Source: FishBase

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