Tracking Shape Changes in Amazon Fish After Major River is Dammed

A team of biologists led by Craig Albertson and Ph.D. student Chaise Gilbert report this week on their comparison between museum collections of cichlid fishes collected before a dam was closed in 1984 on the Tocantins River in the Amazon and contemporary specimens taken from the Tucuruí Reservoir by fishermen 34 years later.

Cichlid fishes are able to respond rapidly to environmental change and offer a good model.

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