Wednesday 9 May 2007

Bedbugs Shoot Up Too

In follow up to Monday's post on Giant Squids Shooting Up, the behaviour of ‘injecting’ sperm directly into the female is not limited to the giants of the seas. A male bedbug of the genus Cimex uses a spike on his penis to pierce a hole through the female's back. He then ejaculates into this hole and his sperm swim around the female's blood until they reach her ovaries. The fertilized eggs then develop into embryos which are born alive in the usual manner. How and why such a system developed is a mystery.

37 comments:

Anonymous said...

I was wondering how long that once a week format you planned was going to last. I see you've added a "short updates throughout the week" section.

Blogging can really be addictive can't it? You'll be like PZ with 10 posts a day before you know it.

Kate Hudson said...

You're right: VERY addictive! i am enjoying getting to know the blogosphere and finding like minds from all over the world.

Beaman said...

Crikey! All those bed bugs doing it while I'm trying to get some sleep. The cheek!

Unknown said...

Kate,

Dr Tatiana (which I previously cited) muses that sometimes male bedbugs may inject other males in the hope that the sperm will find its way to their testicles, where it would get a second chance (in a female body, hopefully). She seems to dismiss it, at least 'til proof are brought forward.

Still, it makes me think of the way some parasites (blood flukes) find their ways inside our own body. This makes bedbugs' sperm cells look like parasites...

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