2015考研英语阅读社会性蜘蛛_大学英语阅读

　　一种可能的解释是，这一群体像是大型托儿所。

　　Ms Grinsted discovered this possibility by experiment.

　　格林斯蒂德女士通过实验得出了这种可能性。

　　First, she identified 19 females who were looking after recently hatched young, and another20 who had eggs.

　　首先，她找到19只照料新孵化幼虫的雌蜘蛛以及20只刚产过卵的雌蜘蛛。

　　In each case she introduced an intruder, in the form of a spider from the same colony.

　　然后，她将来自同一群体的一只蜘蛛作为入侵者分别引入上述两组个体。

　　Both mothers and mothers-to-be were surprisingly tolerant of what would, in most spiderspecies, be a serious threat.

　　这些蜘蛛妈妈及准妈妈出人意料地表现出容忍性，而不像多数种类的蜘蛛那样将之视为严重威胁。

　　Only 40% of the time did they attempt to chase the intruder away, or bite it.

　　它们只在40%的时间中试图赶走或咬噬入侵者。

　　Ms Grinsted then took another 40 spiders and swapped some of their broods.

　　随后格林斯蒂德女士又取了40只蜘蛛并互换其部分幼虫。

　　The upshot, she found, was that a female was as likely to look after and guard another sbrood as she was her own.

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