A nematode parasite causes ants to look like berries that birds like, putting ants on the diet and helping to spread the parasite. Cynthia Graber reports. 线虫(寄生虫)使得蚂蚁看起来像小鸟喜欢的浆果,通过使蚂蚁成为食物的方式帮助传播。------------ When is an ant like a piece of fruit? When it’s infected by a parasite. Researchers affiliated with the Smithsonian Tropical Research Institute discovered this bizarre occurrence in Central America as they were studying the gliding ability of a certain species of ant. They found some colony members with bright red swollen abdomens. The scientists took specimens back to the lab and discovered they were full of hundreds of nematode eggs. The bright red bellies look suspiciously like the brilliant red and pink berries that proliferate in the rainforest. 蚂蚁什么时候看起来像一块水果?什么时候被寄生虫感染?和STRI相联的研究人员在研究某种蚂蚁滑翔能力的时候于美国中部发现这个奇异的现象。他们发现有些蚂蚁的腹部是亮红色。科学家将样本待会实验室,发现肚子里有很多线虫的卵。这亮红色的腹部看起来很像热带地区盛产的红粉色浆果。 Researchers think that the nematode makes the ant look like fruit to get birds to eat the ants. Birds usually keep the ants off their menu because of armor and a bad chemical taste. The birds then spread parasite eggs in their droppings. Ants forage through bird droppings for seeds. They feed the infected droppings to ant larvae, beginning the infection process all over again. The red-bellied ant is the first known case of a parasite causing fruit mimicry. One of the researchers was surprised that something “dumb as a nematode” can manipulate its host in such a sophisticated way. But evolution works no matter how dumb organisms are. 研究人员认为线虫是为了让小鸟吃掉蚂蚁而使他们看起来像浆果的。小鸟一般不吃蚂蚁,因为其外壳坚硬,味道糟糕。(但是变成了"浆果",小鸟还是吃了)小鸟通过粪便传播了寄生虫的卵。蚂蚁通过鸟粪搜寻到卵。(此时蚂蚁又看起来像浆果了)。传递的过程又重新开始了。红肚子蚂蚁是第一个寄生虫导致其像水果的案例。有一位研究人员惊奇地发现,低能的线虫竟然可以通过如此复杂的方式控制其主人。但是无论多么低能的生物体,进化从在不曾停止。 --Cynthia Graber 翻译的很好!我有2句有疑问. 这句:Ants forage through bird droppings for seeds.我的理解是:蚂蚁从鸟的粪便里找种子吃. 这句:They feed the infected droppings to ant larvae,They指的是寄生虫吗?那就是:寄生虫把受到感染的粪便喂给蚂蚁幼虫?我不是很确定.楼主觉得呢? -- by 会员 selfmotivated (2011/10/20 1:33:30)
seeds我认为应该理解成卵,这样符合蚂蚁吃了变成浆果的逻辑。 they应该指小鸟吧,这句忘了翻译,是小鸟feed droppings to 蚂蚁幼虫。 open to discuss. |