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In Brief: Fish's future is a bit of a mouthful

作者:兀官疽接    发布时间:2019-02-26 01:06:02    

A bulging mouth is a promising sign for the keepers of this small tropical fish. Only 30 of the species survive – and the bulge is a sign of pregnancy. The female keeps her eggs and growing young in her mouth until they are ready for the outside world. Haplochromis nyereri, named in honour of President Nyerere of Tanzania, was driven to extinction in its native Lake Victoria by the predatory Nile perch. The future of the species now lies in the hands of Gordon Reid, who runs the aquariums at the Horniman Museum in South London. Under Reid’s care, the three sexually active females have all produced eggs. Unfortunately, adult fish are prone to eat small fry once they have left the mother’s mouth. To avoid this, the mothers-to-be are moved to a separate tank. But almost every attempt to move the fish has panicked them, including this one,

 

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