dearJulius.com

World's biggest king penguin colony shrinks 90 percent

© Provided by AFP   The last time scientists set foot on France's remote Ile aux Cochons -- roughly half way between the tip of Africa and Antarctica -- the island was blanketed by two million of the flightless birds, which stand about a metre (three feet) tall

By Marlowe HOOD, AFP

The planet's largest colony of king penguins has declined by nearly 90 percent in three decades, alarmed researchers said Monday.

The last time scientists set foot on France's remote Ile aux Cochons -- roughly half way between the tip of Africa and Antarctica -- the island was blanketed by two million of the flightless birds, which stand about a metre (three feet) tall.

But recent satellite images and photos taken from helicopters show the population has collapsed, with barely 200,000 remaining, according to a study published in Antarctic Science.

King penguins are home bodies. While adults will set to sea for days at a time foraging for food, the species does not migrate.

Why the colony on Ile aux Cochon has been so decimated remains a mystery.

"It is completely unexpected, and particularly significant since this colony represented nearly one third of the king penguins in the world," said lead author Henri Weimerskirch, an ecologist at the Centre for Biological Studies in Chize, France, who first set eyes on the colony in 1982.

Climate change may play a role.

In 1997, a particularly strong El Nino weather event warmed the southern Indian Ocean, temporarily pushing the fish and squid on which king penguins depend south, beyond their foraging range.

"This resulted in population decline and poor breeding success" for all the king penguin colonies in the region, Weimerskirch said.

El Nino's are cyclical events that occur every two to seven years. But they can be amplified by global warming, which itself produces many of the same results, albeit on a longer timescale.

Indeed, Weimerskirch and colleagues showed in an earlier study that climate change, on its current trajectory, will likely make the Iles Crozet -- the archipelago that contains Ile aux Cochon -- unviable for king penguins by mid-century.

Migration is not an option because there are no other suitable islands within striking range.

Other factors may be contributing to the decline of the Ile aux Cochon colony, including overcrowding.

- One egg at a time -
© Provided by AFP   Recent satellite images and photos taken from helicopters show the king penguin population on Ile aux Cochon has collapsed, with barely 200,000 remaining

"The larger the population, the fiercer the competition between individuals," noted a statement from France's National Centre for Scientific Research, which funded the study.

"The repercussions of lack of food are thus amplified and can trigger an unprecedented rapid and drastic drop in numbers."

But this so-called "density-dependent effect" can also be made worse by climate change, the study notes.

Another possible culprit is avian cholera, which has affected seabirds on nearby Marion and Amsterdam Islands, including some king penguins.

But until Weimerskirch and other researchers return to Ile aux Cochons -- hopefully, he said, in early 2019 -- they won't know for sure.

It is also possible that invasive species such as rats, mice or cats, have found their way onto the island.

The Red List of Threatened Species conservation status for king penguins is currently "least concern," but the new data may prompt a reevaluation.

King penguins are the second-largest penguin species after the Emperor.

They do not make a nest, but rather lay one egg at a time and carry it around on their feet covered with a flap of abdominal skin, called a brood patch.

Parents take turns incubating the egg, switching every couple of weeks over a two-month period.

There are two sub-species of kings. Aptenodytes patagonica patagonicus inhabits the Falklands and South Georgia Island, while Aptenodytes patagonica halli resides in the southernmost reaches of Indian Ocean and South Pacific.

COMMENTS





|Featured Content_$type=three$c=3$l=0$m=0$s=hide$rm=0

Name

Animals,47,Birds,3,Cat,17,Cats,32,Dogs,135,Featured,7,Features,23,Health,6,Koala,1,Monkey,1,News,1,Panda,1,Penguin,3,Pets,28,Squirrel,1,
ltr
item
Pets Magazine: World's biggest king penguin colony shrinks 90 percent
World's biggest king penguin colony shrinks 90 percent
https://2.bp.blogspot.com/-tX1Z6pqXHKs/W8yvPvx0DzI/AAAAAAAAfvA/SXdZ27f-FpAYhz64xIwWduF7eJMHxjYEgCLcBGAs/s1600/1.jpg
https://2.bp.blogspot.com/-tX1Z6pqXHKs/W8yvPvx0DzI/AAAAAAAAfvA/SXdZ27f-FpAYhz64xIwWduF7eJMHxjYEgCLcBGAs/s72-c/1.jpg
Pets Magazine
https://pets.dearjulius.com/2018/10/worlds-biggest-king-penguin-colony.html
https://pets.dearjulius.com/
https://pets.dearjulius.com/
https://pets.dearjulius.com/2018/10/worlds-biggest-king-penguin-colony.html
true
780598715723239276
UTF-8
Loaded All Posts Not found any posts VIEW ALL Read More Reply Cancel reply Delete By Home PAGES POSTS View All RECOMMENDED FOR YOU LABEL ARCHIVE SEARCH ALL POSTS Not found any post match with your request Back Home Sunday Monday Tuesday Wednesday Thursday Friday Saturday Sun Mon Tue Wed Thu Fri Sat January February March April May June July August September October November December Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec just now 1 minute ago $$1$$ minutes ago 1 hour ago $$1$$ hours ago Yesterday $$1$$ days ago $$1$$ weeks ago more than 5 weeks ago Followers Follow THIS PREMIUM CONTENT IS LOCKED STEP 1: Share. STEP 2: Click the link you shared to unlock Copy All Code Select All Code All codes were copied to your clipboard Can not copy the codes / texts, please press [CTRL]+[C] (or CMD+C with Mac) to copy