气候变化领域集成服务门户(CCPortal): High-energy, high-fat lifestyle challenges an Arctic apex predator, the polar bear

CCPortal

DOI	10.1126/science.aan8677
	High-energy, high-fat lifestyle challenges an Arctic apex predator, the polar bear
	Pagano A.M.; Durner G.M.; Rode K.D.; Atwood T.C.; Atkinson S.N.; Peacock E.; Costa D.P.; Owen M.A.; Williams T.M.
发表日期	2018
ISSN	0036-8075
起始页码	568
结束页码	572
卷号	359 期号:6375
英文摘要	Regional declines in polar bear (Ursus maritimus) populations have been attributed to changing sea ice conditions, but with limited information on the causative mechanisms. By simultaneously measuring field metabolic rates, daily activity patterns, body condition, and foraging success of polar bears moving on the spring sea ice, we found that high metabolic rates (1.6 times greater than previously assumed) coupled with low intake of fat-rich marine mammal prey resulted in an energy deficit for more than half of the bears examined. Activity and movement on the sea ice strongly influenced metabolic demands. Consequently, increases in mobility resulting from ongoing and forecasted declines in and fragmentation of sea ice are likely to increase energy demands and may be an important factor explaining observed declines in body condition and survival. © 2017 The Authors, some rights reserved.
英文关键词	activity pattern; bear; bioenergetics; body condition; food intake; foraging efficiency; lifestyle; marine mammal; metabolism; population decline; predator; prey capture; sea ice; survival; Article; body constitution; climate change; daily life activity; energy balance; energy metabolism; environmental monitoring; female; foraging behavior; global positioning system; lipid diet; marine environment; metabolic rate; nonhuman; polar bear; population dynamics; predator prey interaction; priority journal; resting metabolic rate; sea ice; survival rate; animal; Arctic; bear; body weight; eating; feeding behavior; ice cover; metabolism; movement (physiology); season; Arctic; Mammalia; Ursus maritimus; Animals; Arctic Regions; Body Weight; Eating; Energy Metabolism; Feeding Behavior; Ice Cover; Movement; Seasons; Ursidae
语种	英语
来源期刊	Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/244982
作者单位	U.S. Geological Survey, Alaska Science Center, Anchorage, AK 99508, United States; Department of Ecology and Evolutionary Biology, University of California, Santa Cruz, Santa Cruz, CA 95060, United States; Post Office Box 19, Group 7, RR2, Dugald, MB R0E 0K0, Canada; Institute for Conservation Research, San Diego Zoo Global, San Diego, CA 92027, United States
推荐引用方式 GB/T 7714	Pagano A.M.,Durner G.M.,Rode K.D.,et al. High-energy, high-fat lifestyle challenges an Arctic apex predator, the polar bear[J],2018,359(6375).
APA	Pagano A.M..,Durner G.M..,Rode K.D..,Atwood T.C..,Atkinson S.N..,...&Williams T.M..(2018).High-energy, high-fat lifestyle challenges an Arctic apex predator, the polar bear.Science,359(6375).
MLA	Pagano A.M.,et al."High-energy, high-fat lifestyle challenges an Arctic apex predator, the polar bear".Science 359.6375(2018).