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It’s a long lived and volatile chemical

Chemical Whales

canada goose outlet store calgary Narration: Of all the continents, Antarctica is the coldest, the driest, the highest, the windiest, and the brightest. And canada goose factory sale as the only canada goose outlet sale landmass with hardly any people, you’d expect that it’s also the cleanest. For the Canada Goose sale southern hemisphere’s population of humpback whales to remain healthy, Antarctica needs to Canada Goose Parka be free of canada goose uk black friday chemical pollution. canada goose outlet store calgary

canada goose outlet new york Dr Susan Bengtson Nash: The main concern is the diffuse sort of toxic effect it has in just compromising the immune system and therefore making the humpback whales more vulnerable to fighting canada goose uk shop disease. canada goose outlet new york

canada goose outlet boston Narration: But new research is revealing that humpback whales are contaminated by toxins that can only come from their staple diet of krill. In terms of biomass, the Antarctic krill is arguably the most successful animal species on the planet. A few years ago, Susan Bengtson Nash analysed several thousand of them to see what they canada goose uk outlet might contain. canada goose outlet boston

canada goose outlet toronto address Dr Nash: We started with krill krill being the keystone species of the Antarctic, meaning that if you removed the krill, you’re also effectively removing other species. And so it made sense to really start with krill, find out what’s in krill, and thereby you can see what the predators are exposed to as well. canada goose outlet toronto address

canada goose outlet toronto factory Narration: She found more than a hundred different forms of chemicals known as persistent organic pollutants, or POPs for short. They’re organochlorine pesticides like DDT, or industrial chemicals like PCBs and dioxins. Many were banned decades ago, but are so long lived they continue to persist today. The problem is that canada goose persistent organic pollutants aren’t broken down canada goose coats by water. Instead they dissolve in the body fat of animals. canada goose outlet toronto factory

canada goose outlet winnipeg Dr Nash: They’re very lipophilic, they’re fat loving. So if they do make it into the food web, they can accumulate in our body. canada goose outlet winnipeg

canada goose jacket outlet store Narration: But how do these synthetic chemicals end up in remote Antarctica, far away from agriculture and industry? canada goose jacket outlet store

canada goose vest outlet Mark: Let’s say we dump a load of DDT onto our imaginary world here. It’s a long lived and volatile chemical, so over decades it evaporates into the atmosphere; And it only comes back down again when it hits a colder temperature, and condenses out Canada Goose Online of Canada Goose online the air. That’s how these chemicals move around the world, bouncing from a warm climate to a colder one. And of course, once they get down here, it’s a one way trip, there’s no going back. canada goose vest outlet

canada goose outlet online reviews Narration: That’s why persistent organic pollutants end up concentrating at the poles. canada goose outlet online reviews

canada goose outlet germany Dr Nash: Assuming that an air mass has just deposited canada goose black friday sale some DDT out of the atmosphere onto the ice perhaps, then in the summer when the ice melts, it’ll either be taken up by herbivores such as the krill, or else deposit to the seabed. canada goose outlet germany

canada goose outlet in chicago Mark: And after krill? canada goose outlet in chicago

canada goose outlet store new york Dr Nash: After krill you’ve got everything else in the Antarctic. Pretty much everything depends directly or indirectly on the krill. canada goose outlet store new york

canada goose sale uk Narration: In the feeding areas around Antarctica, each humpback whale gulps two tonnes of krill every day. As winter sets in, they head north from the ice cap, travelling to warmer waters to give birth and mate. One migration route tracks along the east coast of Australia on the way to North Queensland. This is the humpback highway off North Stradbroke Island, where more than 8000 whales pass every year. canada goose sale uk

canada goose womens outlet Mark: Here he is. Look at this. A humpback whale, in the middle of its journey from Antarctica up here and all the way back down again. That’s fantastic. It takes buy canada goose jacket seven months, that journey. This is really Canada Goose Coats On Sale exciting. Here it comes again. It’s the longest migration, one of the longest migrations, canada goose coats on sale of any mammal. But what amazes me most is that they do it all on an empty stomach. They rely entirely on their fat reserves. canada goose womens outlet

canada goose outlet online store Narration: Susan and her colleague Courtney are the first to Canada Goose Jackets investigate the chemical burden in humpbacks as they swim ten thousand kilometres without eating. canada goose outlet online store

canada goose jacket outlet toronto Courtney Waugh: Somewhere between about four to eleven kilometres an hour they, canadagooseoutletjackets they tend to be travelling. canada goose jacket outlet toronto

canada goose outlet canada Narration: They aim cheap Canada Goose to get thirty samples of blubber and the chemicals inside at a time when the whales are most vulnerable to any toxic effects. canada goose outlet canada

canada goose outlet store uk Dr Nash: They’re just drawing on their fat buy canada goose jacket cheap reserves that they’ve built up in the summer and with that mobilization of fat canada goose clearance sale you’re going to get mobilization of these contaminants. canada goose store So all these contaminants that may have been locked cheap canada goose uk away and dormant, are now circulating in the bloodstream and can reach their target sites of toxicity. canada goose outlet store uk

canada goose outlet in usa Narration: It takes a fair bit of skill, a lot of luck, and a specialised dart gun to take canadian goose jacket a small plug of blubber from the heaving flank of a speeding whale. canada goose outlet in usa

canada goose uk site Dr Nash: Court, let’s shoot on the right cos of the lighting. canada goose uk site

canada goose outlet london uk Courtney: You can often see uk canada goose outlet them under the water just before they surface, so you’ve got quite a lot of time to line up the shot. canada goose outlet london uk

canada goose outlet miami Narration: The biopsy darts cause no harm to the humpbacks, unlike the research methods of Japanese whalers. canada goose outlet miami

canada goose outlet sale Dr Nash: And the biopsy dart, don’t forget the diameter of it is the same as some human biopsies, and you look at that in a fifteen metre humpback whale, it’s not really that intrusive. canada goose outlet sale

goose outlet canada Courtney: uk canada goose We’ve got a whale ahead. Yep about a hundred metres just in canada goose clearance front of the boat. Two whales. goose outlet canada

canada goose outlet montreal Narration: While Susan and Courtney target the top of the food chain in sunny Canada Goose Outlet Queensland down in Hobart, another member of their team tests krill in a refrigerated shipping container canada goose outlet montreal.

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