Size matters: Large Marine Protected Areas work for dolphins

Ecologists in New Zealand have shown for the first time that Marine Protected Areas – long advocated as a way of protecting threatened marine mammals – actually work. Their study, based on 21 years' monitoring and published today in the British Ecological Society's Journal of Applied Ecology, reveals that a marine sanctuary off the coast of Christchurch has significantly improved survival of Hector's dolphins – one of the rarest dolphins in the world.

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