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人类祖先直立行走:为了独占食物 - 站长搜索
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人类祖先直立行走:为了独占食物

业界动态 2014-06-03 05:38:53 转载来源: 网络整理/侵权必删

AS网站目录(www.adminso

AS网站目录(www.adminso.com):人类祖先直立行走为了独占食物

据报道,科学家通过分析黑猩猩的行为,可判断人类祖先由四肢着地变为直立行走,是由于为了独占不易获得的食物.

京都大学灵长类研究所及英国剑桥大学等组成的国际研究小组在对黑猩猩做实验后宣布:"人类的祖先之所以由四肢着地变为直立行走,是由于为了独占不易获得的食物,必须腾出双手以便搬运更多."这一成果或将成为解析人类为何直立行走的线索之一.

该小组在西非几内亚的野外实验基地做实验,把常见的坚果与稀有坚果以不同的量进行组合后发给数只黑猩猩,然后观察它们的行为.

结果发现,和仅得到常见坚果时相比较,黑猩猩在得到掺有稀有坚果的食物时的直立行走频率高出约3倍.

此外通过观察还发现,黑猩猩在从田里偷取木瓜时直立行走的频率也达35%.

该小组成员、京都大学教授松泽哲郎表示:"由于气候变化导致森林面积减小,人类的初期祖先意外获得珍贵食物等的机会增多,在与其他个体的竞争中,直立行走的一方更占优势,久而久之直立行走成为了一种常态."

标签: 人类 祖先 直立 行走 为了 独占 食物


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