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Climate change effects on food sources may have contributed to a halving of penguin populations in western Antarctica, a new study suggests.

Researchers found that populations of Adelie and chinstrap penguins in the West Antarctic Peninsula (WAP) and Scotia Sea had fallen by 50 per cent in the last 30 years.

The decline was directly related to a huge reduction in numbers of the penguins’ main prey, shrimp-like krill.

Krill density had dropped by as much as 80per cent, both because of heightened Read more…