연락처 : HG 이메일 : valeria.ridgley@yahoo.com.au

OILED UP Consuming even small amounts of crude oil could make birds sluggish. MINNEAPOLIS - Birds don’t have to be drenched in crude oil to be harmed by spills and leaks. Ingesting even small quantities of oil can interfere with the animals’ normal conduct, researchers reported November 15 at the annual meeting of the Society of Environmental Toxicology and Chemistry North America. Birds can take in these smaller doses by preening slightly greasy feathers or eating contaminated food, for BloodVitals health instance. Big oil spills, such as the 2010 Deepwater Horizon disaster, go away a trail of dead and visibly oily birds (SN: BloodVitals device 4/18/15, p. 22). But incidents like final week’s 5,000-barrel spill from the Keystone pipeline - and smaller spills that don’t make national headlines - can even impression wildlife, even in the event that they don’t spur dramatic photographs. We summarize the week's scientific breakthroughs every Thursday. To test how oil snacks may affect birds, researchers fed zebra finches small amounts of crude oil or peanut oil for two weeks, then analyzed the birds’ blood and habits.

Birds fed the crude oil had been less active and spent much less time preening their feathers than birds fed peanut oil, said research coauthor Christopher Goodchild, an ecotoxicologist at Oklahoma State University in Stillwater. Oil-soaked birds will usually preen excessively to try to remove the oil, sometimes at the expense of other essential activities equivalent to feeding. But in this case, the birds didn’t have any crude oil on their feathers, so the decrease in preening might be a sign they’re not feeling nicely, the researchers say. Exactly how the oil impacts the birds’ exercise levels isn’t clear. Researchers suspected that oil might deprive birds of oxygen by affecting hemoglobin, which carries oxygen within the blood. Blood exams didn’t turn up any evidence of damaged hemoglobin proteins but did find some proof that oil-sipping birds may be anemic, Goodchild mentioned. At the higher of two crude oil doses, birds’ blood contained less hemoglobin per purple blood cell, a sign of anemia.

The findings, while preliminary, add to a growing pile of proof that estimates of the variety of animals impacted by oil spills may be too low. As an illustration, even a mild sheen of oil on sandpipers’ wings makes it more durable to fly, costing birds more vitality, a different group of researchers reported earlier this yr. That might have an effect on all the things from birds’ every day movements to lengthy-distance migration. Questions or feedback on this article? C. Goodchild, A. Metz and S. DuRant. Are damaged erythrocytes linked to reduced activity and self-maintenance behaviors in birds exposed to crude oil? I. Maggini et al. Light oiling of feathers will increase flight power expenditure in a migratory shorebird. Journal of Experimental Biology vol. 220, p. 2372. July 5, 2017. doi:10.1242/jeb.158220. We're at a important time and supporting science journalism is extra essential than ever. Science News and our parent organization, BloodVitals SPO2 the Society for Science, need your help to strengthen scientific literacy and be sure that necessary societal decisions are made with science in mind.

Posts from this subject will probably be added to your daily e-mail digest and your homepage feed. Posts from this subject will probably be added to your day by day electronic mail digest and your homepage feed. Posts from this subject will be added to your each day email digest and your homepage feed. Posts from this creator BloodVitals tracker shall be added to your daily email digest and your homepage feed. Posts from this author might be added to your daily e mail digest and your homepage feed. Five years since the first Apple Watch and a full seven years on from Samsung’s Galaxy Gear, BloodVitals SPO2 we all know what a smartwatch is. We all know that it’s not going to exchange your smartphone anytime soon, that it will must be charged each day or two, and that its finest capabilities are for fitness tracking and seeing notifications when your telephone isn’t in your hand. Samsung’s newest smartwatch, the $399-and-up Galaxy Watch 3, does not do anything to change those expectations.

In fact, BloodVitals device there isn’t much distinction between the Galaxy Watch 3 and any smartwatch that’s come out up to now few years - at the least by way of core functionality. If you’ve managed to ignore or keep away from smartwatches for the previous half-decade, the Watch 3 isn’t going to vary your mind or win you over. None of that is to say the Galaxy Watch 3 is a bad smartwatch and even a bad product. Quite the opposite, the Watch 3 fulfills the definition and expectations that we’ve accepted for smartwatches perfectly adequately. It does the issues we count on a smartwatch to do - track your activity and supply quick entry to notifications - simply fantastic. And if you’re an Android (and even better, a Samsung) telephone proprietor in search of a new smartwatch, the Galaxy Watch 3 is a wonderful decide. The Galaxy Watch three follows Samsung’s tradition of making a smartwatch look much like a conventional watch, full with a round face.