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Penguins marching into trouble
Date:2/16/2009

A quarter-century of data reveals how changing weather patterns and land use, combined with overfishing and pollution, are taking a heavy toll on penguin numbers

NEW YORK (Embargoed by the American Association for the Advancement of Science for release 5p.m. EST Friday, Feb. 12, 2009) A combination of changing weather patterns, overfishing, pollution, and other factors have conspired to drive penguin populations into a precipitous decline, according to long-term research funded by the Wildlife Conservation Society. The findings were presented today by University of Washington professor and WCS scientific fellow Dr. P. Dee Boersma at the American Association for the Advancement of Science annual meeting in Chicago. Boersma has studied Magellanic penguins in Argentina for WCS since 1982.

Boersma, director of the Wildlife Conservation Society's Penguin Project, has recently published two papers documenting some of the serious challenges faced by Magellanic penguins at a colony she has studied for more than 25 years at Punta Tombo, a wildlife reserve some 1,000 miles south of Buenos Aires. The papers appeared in the February issues of the journals Marine Ecology Progress Series, and Ecological Monographs.

Boersma's data reveal that penguins at Punta Tombo are traveling farther to find food than they did just a decade ago due to changing ocean conditions and overfishingparticularly of anchovies, a favorite penguin food. This has forced some penguins to attempt to nest outside of protected areas where they often fall prey to predators. Meanwhile, changing weather patterns have also led to increased instances of heavy rains, which have caused high mortality of penguin chicks in five of the last 25 years.

All told, penguin numbers at Punta Tombo have declined by more than 20 percent in the last 22 years, from 300,000 to just 200,000 breeding pairs, Boersma said.

"Penguins are having trouble with food on their wintering grounds
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Contact: Stephen Sautner
ssautner@wcs.org
718-220-3682
Wildlife Conservation Society
Source:Eurekalert  

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