灵长类动物“优雅地”变老-凯发k8官网

灵长类动物“优雅地”变老
文章来源:未知 文章作者:enread 发布时间:2011-03-11 03:37 字体: [ ] 
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a new study says 1, 2 and other 4 grow old 5 much like humans. the findings come from the first-ever multi-species comparison of 3 aging patterns reported in the march 11 issue of science. it was long thought that humans, who have 6 long life spans, age more slowly than other animals. but new research funded by the national science foundation's division of environmental biology suggests the pace of human aging may not be so unique after all.

we had good reason to think human aging was unique, said co-author anne bronikowski of iowa state university. humans, for example, live longer than many animals with some exceptions--parrots, seabirds, 7 and tortoises. but humans are the longest-lived primates.

"humans live for many more years past our reproductive prime," bronikowski said. "if we were like other mammals, we would start dying fairly rapidly after we reach mid-life. but we don't."

bronikowski is one of 11 biologists and anthropologists(人类学家) whose research figured into the study.

"there's been this argument in the scientific literature for a long time that human aging was unique, but we didn't have data on aging in wild primates besides chimps until recently," said another co-author susan alberts, a duke university biologist.

the researchers combined data from long-term studies of seven species of wild primates: capuchin monkeys from costa rica, muriqui monkeys from brazil, 9(狒狒) and blue monkeys from kenya, chimpanzees from tanzania, gorillas from rwanda, and sifaka lemurs(狐猴) from madagascar.

the work focused on the risk of dying. when researchers compared human aging rates--measured as the rate at which mortality risk increases with age--to similar data for nearly 3,000 individual monkeys, apes, and lemurs. the human data fell 10 within the primate continuum.

"human patterns are not strikingly different, even though wild primates experience sources of mortality from which humans may be protected," the authors write in science.

the results also confirm a pattern observed in humans and elsewhere in the animal kingdom: as males age, they die sooner than their female counterparts. in primates, the mortality gap between males and females is narrowest for the species with the least amount of male-male aggression--a monkey called the muriqui--the researchers report.

"muriquis are the only species in our sample in which males do not compete 11 with one another for access to mates," said co-author karen strier, an 8 at the university of wisconsin who has studied muriquis since 1982. the results suggest the reason why males of other species die faster than females may be the stress and strain of competition, the authors say.

modern medicine is 12 humans live longer than ever before, the researchers note. "yet we still don't know what governs maximum life span," alberts said. she is also the associate director of the nsf-funded national 13 synthesis center in durham, n.c.

"some human studies suggest we might be able to live a lot longer than we do now," she said. "looking to other primates to understand where we are and aren't flexible in our aging will help answer that question."



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1 2a09048610e52de775e2fe426c063f06     
(非洲)黑猩猩( chimp的名词复数 )
参考例句:
  • chimps are too scarce, and too nearly human, to be routinely slaughtered for spare parts. 黑猩猩又太少,也太接近于人类,不可以作为人器官备用件说杀就杀。 来自英汉非文学 - 生命科学 - 医学的第四次革命
  • and as nonprimates, they provoke fewer ethical and safety-related concerns than chimps or baboons. 而且作为非灵长类,就不会产生像用黑猩猩或狒狒那样的伦理和安全方面的顾虑。 来自英汉非文学 - 生命科学 - 医学的第四次革命
2 a04bd21e2b9b42b0d71bbb65c0c6d365     
n.大猩猩( gorilla的名词复数 );暴徒,打手
参考例句:
  • the similitude between humans and gorillas 人类和大猩猩的相像
  • each family of gorillas is led by a great silverbacked patriarch. 每个大星星家族都由一个魁梧的、长着银色被毛的族长带领着。 来自《简明英汉词典》
3 a1yzi     
n.灵长类(目)动物,首席主教;adj.首要的
参考例句:
  • 14 percent of primate species are highly endangered.14%的灵长类物种处于高度濒危状态。
  • the woolly spider monkey is the largest primate in the americas.绒毛蛛猴是美洲最大的灵长类动物。
4 9536f12c27d026e37c108bd6fc53dbba     
primate的复数
参考例句:
  • primates are alert, inquisitive animals. 灵长目动物是机灵、好奇的动物。
  • consciousness or cerebration has been said to have emerged in the evolution of higher primates. 据说意识或思考在较高级灵长类的进化中已出现。
5 kfyxd     
ad.大大方方地;优美地
参考例句:
  • she sank gracefully down onto a cushion at his feet. 她优雅地坐到他脚旁的垫子上。
  • the new coats blouse gracefully above the hip line. 新外套在臀围线上优美地打着褶皱。
6 bkqzs3     
adv.比较...地,相对地
参考例句:
  • the rabbit is a relatively recent introduction in australia.兔子是相对较新引入澳大利亚的物种。
  • the operation was relatively painless.手术相对来说不痛。
7 0940cacadaf01e94ba47fd333a69de59     
n.蛤;蚌,蛤( clam的名词复数 )v.(在沙滩上)挖蛤( clam的第三人称单数 )
参考例句:
  • the restaurant's specialities are fried clams. 这个餐厅的特色菜是炸蚌。 来自《简明英汉词典》
  • we dug clams in the flats et low tide. 退潮时我们在浅滩挖蛤蜊。 来自辞典例句
8 yzgzpk     
n.人类学家,人类学者
参考例句:
  • the lecturer is an anthropologist.这位讲师是人类学家。
  • the anthropologist unearthed the skull of an ancient human at the site.人类学家在这个遗址挖掘出那块古人类的颅骨。
9 2ea074fed3eb47c5bc3098d84f7bc946     
n.狒狒( baboon的名词复数 )
参考例句:
  • baboons could break branches and leaders. 狒狒会折断侧枝和顶梢。 来自辞典例句
  • and as nonprimates, they provoke fewer ethical and safety-related concerns than chimps or baboons. 而且作为非灵长类,就不会产生像用黑猩猩或狒狒那样的伦理和安全方面的顾虑。 来自英汉非文学 - 生命科学 - 医学的第四次革命
10 ynzzbp     
adv.整洁地,干净地,灵巧地,熟练地
参考例句:
  • sailors know how to wind up a long rope neatly.水手们知道怎样把一条大绳利落地缠好。
  • the child's dress is neatly gathered at the neck.那孩子的衣服在领口处打着整齐的皱褶。
11 pmlz1k     
ad.公开地
参考例句:
  • there were some overtly erotic scenes in the film. 影片中有一些公开色情场面。
  • nietzsche rejected god's law and wrote some overtly blasphemous things. 尼采拒绝上帝的律法,并且写了一些渎神的作品。
12 2rgzdc     
n.食物的一份&adj.帮助人的,辅助的
参考例句:
  • the poor children regularly pony up for a second helping of my hamburger. 那些可怜的孩子们总是要求我把我的汉堡包再给他们一份。
  • by doing this, they may at times be helping to restore competition. 这样一来, 他在某些时候,有助于竞争的加强。
13 ctqz7m     
adj.进化的;演化的,演变的;[生]进化论的
参考例句:
  • life has its own evolutionary process.生命有其自身的进化过程。
  • these are fascinating questions to be resolved by the evolutionary studies of plants.这些十分吸引人的问题将在研究植物进化过程中得以解决。
tag标签: life humans primates
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