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About 12 million of the invertebrates are sold annually .

每年这种无脊椎动物要销售120万只。

The influence social experience has on the female wolf spider 's mating choice is almost unheard of among invertebrates .

在无脊椎动物这一群体中，社会经验对雌性狼蛛择偶的影响可说是闻所未闻的。

Brooding meanwhile is a relatively common reproductive trait in antarctic invertebrates and has been linked to the extreme conditions .

同时，孵化也是南极无脊椎动物中常见的特征，这与其极端的生存换环境有关。

The bugs sustain not only the plant , but an intricate food web of bacteria , plankton and invertebrates .

这些怪物不仅供养着植物，而且是由细菌、浮游生物和无脊椎动物组成的一个复杂的食物网。

The phenomenon has been most extensively studied in invertebrates , but is also seen in horses , cows and some species of deer .

这个现象在无脊椎动物中已经广泛的被研究过，而且在马、牛和某些鹿中也有出现。