Sat, Apr 09, 2016 page6

• FEATURE: Hungry penguins hunt Antarctic’s shifting krill

  • AFP, PETERMANN ISLAND, Antarctica
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  Waddling over the rocks, legions of penguins hurl themselves into the icy waters of Antarctica, foraging to feed their young.

  Like seals and whales, they eat krill, an inch-long shrimp-like crustacean which forms the basis of the Southern Ocean food chain.

  However, penguin watchers say the krill are getting scarcer around the western Antarctic peninsula, under threat from climate change and fishing.

  

  A Gentoo penguin is pictured on Petermann Island, Antarctica, on March 2.

  Photo: AFP

  “Krill is the power lunch of the Antarctic. It’s a keystone species for everybody,” said Ron Naveen, leader of the US conservation group Oceanites, as penguins squawked on the rocks behind him.

  In a vast ocean whose water flows influence the whole planet, krill rely on the sea ice to protect them and provide algae to feed them while they grow.

  The ice is getting scarcer.

  The peninsula has warmed by 3oC over the past 50 years, according to groups such as the WWF.

  Scientists suspect that shifting ice patterns are effecting penguin populations.

  “The interaction between warming temperatures, increasing ocean acidity and of course to some extent, although that’s not clear yet, an interaction with the fishing industry fishing for krill, will put pressure on predator populations that are mostly krill feeders,” such as penguins, said Steven Chown, a biologist at Monash University in Australia.

  “Krill fishing may be occurring too close to where the penguin breeding colonies are,” Naveen said. “And perhaps more importantly, areas where the penguins are foraging.”

  Fishing boats catch 300,000 tonnes of krill a year, which is then made into feed for farmed fish and Omega 3 oil supplements, the International Union for Conservation of Nature said.

  Cilia Indahl, head of sustainability at Norwegian fishing company Aker BioMarine, said the total amount of krill caught is just 0.5 percent of the 60 million tonnes eaten each year by sea creatures.

  However, Indahl said that the company has developed a method to minimize environmental harm. The boats trawl slowly, using special filtered nets to avoid catching other creatures.

  “We will also have to consider where we fish for krill, making sure that there is minimum overlap with other animals like penguins and whales and where they feed,” she said.

  Fishing in Antarctica is monitored by the Commission for the Conservation of Antarctic Marine Living Resources (CCAMLR). Member countries must agree between them on catch limits and no-fish areas.

  Environmentalists insist that CCAMLR renew key regulations on krill fishing when it gathers for its annual meeting in October.

  “There’s going to be a fight about whether or not the subdivision of the krill catch, that protects foraging predators like penguins, will be continued,” said Andrea Kavanagh, head of the penguin conservation campaign of the Pew Charitable Trusts, a US non-government organization, referring to the system of restrictions on krill fishing in certain areas.

  “Some countries such as Russia and China indicated they did not see the need for it at last year’s meeting,” Kavanagh said.

  Campaigners said agreement on conservation measures would be crucial for the future of the region, considered one of Earth’s last wildernesses.

  “I feel when I’m here, like, I’m on the front lines of climate change,” said Naveen, who has spent 22 years counting penguins. “It’s happening right now and these penguins are trying to adapt. They’re sending messages to us about how the planet is changing.”
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