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Planet Ark World Environment News - in partnership with Colonial First State Big Fish Important in the Gene Pool -Study

Date: 23-Jun-05
Country: UK

Charles Birkeland at the University of Hawaii and Paul Dayton at Scripps Institution of Oceanography in California have discovered that big fish are vital to maintaining populations, and taking them does crucial damage.

Not only does the fertility of big females increase dramatically compared with small fish, but the offspring of big fish tend to grow bigger and faster than those of little ones, New Scientist magazine reported.

This means that taking the big fish weakens the gene pool by effectively favouring the fish that grow more slowly and stay small.

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