Adelie penguins, slick and efficient swimmers, live on the Antarctic continent and on many small, surrounding coastal islands Almost six million Adelie penguins are living in East Antarctica, more than double the number previously thought, scientists said Wednesday in findings that have implications for conservation. Research by an Australian, French and Japanese team used aerial and ground surveys, tagging and resighting data and automated camera images over several breeding seasons, which allowed them to come up with the new figure. They focused on a 5,000 kilometre (3,100 mile) stretch of coastline, estimating it was home to 5.9 million birds—some 3.6 million more than previously thought. Extrapolating from that, their best guess is 14 to 16 million birds in the whole of Antarctica. Before, population estimates only took into account breeding pairs, said Australian Antarctic Division seabird ecologist Louise Emmerson. "However, our study in East Antarctica has shown that non-breeding Adelie penguins may be as, or more, abundant than the breeders. Adelie penguins, slick and efficient swimmers, live on the Antarctic continent and on many small, surrounding coastal islands. The study also estimated the amount of krill and fish needed to support the Adelie penguin population, prey that is also sought after by seals and whales. "An estimated 193,500 tonnes of krill and 18,800 tonnes of fish are eaten during the breeding season by Adélie penguins breeding in East Antarctica," Dr Emmerson said. The dietary information will be used by the Commission for the Conservation of Antarctic Marine Living Resources to set sustainable krill fishery catch limits.
– In a rare bit of good news in the animal conservation world, scientists say they vastly lowballed the penguin population on Antarctica. The off-base estimate pertains to Adelie penguins—that's the adorable Happy Feet variety—and it turns out there are 3.6 million more of them than previously thought, reports the Huffington Post Australia. A team of Australian, Japanese, and French scientists now think there are 5.9 million of these birds occupying a 3,100-mile stretch of east Antarctica. From that projection, they pegged the total Adelie penguin population on the continent at 14 million to 16 million. The Adelies, named after the wife of the French explorer who discovered them in 1840, are only found on Antarctica and its islands. So why did their number take such a leap? "The reason it's higher is we have incorporated the non-breeding component of the population," says Aussie ecologist Dr. Louise Emmerson. What that means is that while the breeding birds migrate to the island to do the deed and then sit on eggs, making them easy to count, non-breeders are "off foraging out in the water where we can't see them," she says. It turns out the non-breeders were more numerous. How did the experts revise their count? They used aerial surveillance and land-based counting methods, and they studied penguin droppings to ballpark the amount of food the tuxedoed ones consume: an estimated 213,000 tons of krill and 21,000 tons of fish during the breeding season, per the AFP. The findings could help inform conservation efforts for marine and land animals, per the Australian. (What happened to 150K missing penguins?)