划蝽(water boatman)是半翅目,划蝽科一类昆虫的总称。属异翅目(Heteroptera)划蝽科(Corixidae)昆虫。300余种。体扁平,船形;后足桨状,有缘毛。全球分布,体长不足13mm,从高自喜马拉雅山,低至死谷,无论淡水、咸淡水中都有,且极易与仰泳蝽(Heteroptera)混淆。虫体大小在4~12mm。一般体形瘦长,头短。喙1~2节,很短。前胸短,小盾片小,前足短。
人类的耳朵在水底都能听到划蝽发出的吱吱声。
And these peeps can be heard from a stream bottom by the human ear.
这些问题的答案至今还是未知之数,但是科学家们希望通过声音重放实验测试雌性划蝽是喜欢嘹亮的鸣叫还是温柔的鸣叫。
That's unclear so far, but the scientists are hoping to conduct playback experiments to test female preference for loud over soft calls.
于是,科学家们采集了法国一个小溪水域的划蝽,并对 13 只雄性划蝽的行为进行了记录,包括声音大小和身材大小。
So they collected water boatmen from a stream and pond in France. They recorded 13 males doing their thing.
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