Male Spider Castrates Himself And Gets More Stamina

Writes Ed Yong on Discovery News:

To become both a lover and a fighter, the male spider Nephilengys malabarensis snaps off his penis inside his partner while they have sex. He becomes better at fending off other males who try to mate with her, because his now-lightened body can fight for longer without tiring. And while he’s playing the guardian, his detached genitals can continue pumping sperm into the female. Through self-castration, he gets more stamina, and he gets more stamina.

I first wrote about the self-castrating spider a few months ago. Then, Daiqin Li from the National University of Singapore confirmed that the severed penis continues to pump sperm into the female. That allows the newly minted eunuch to fertilise her remotely, while also blocking the way to other males…

Read More: Discovery News

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  • huh

    thanks for exposing this government disinformation

    • Monkey See Monkey Do

      Idiot. Why can’t a website have a name without every article posted on it having to relate to that name. Read the ‘about’ section.

    • Calypso_1

      Don’t be so hasty to dismiss the mysteries of nature as irrelevant to the workings of human machinations  - eunuchs have held a vital role in many civilizations – particularly as warriors and masters of intrigue. In the domestic sphere, though loath to admit, few males escape some degree of ‘emasculation’.  That this emerges from underlying evolutionary processes is obvious and opens up interesting psychodynamic interpretations.

    • Jesus

      the government hates you, thats all you need to know. everything else is for entertainment purposes only, the icing on the cake.

    • http://www.facebook.com/arthur.stordahl Arthur Stordahl

      Umm I thought this would be exactly that, the gov has seemingly neutered a good part of the population, and a furthering seems encouraged. Like I said, only thought it would go in this direction~does not quite fit…interesting/fun facts in 60 seconds, I will buy that! good tidbit.

  • DeepCough

    Them arachnids ain’t right….

    • Jesus

      major cock block if you ask  me

  • Nunzio X

    >>To become both a lover and a fighter, the male spider Nephilengys malabarensis
    snaps off his penis inside his partner while they have sex. He becomes
    better at fending off other males who try to mate with her, because his
    now-lightened body can fight for longer without tiring.<<

    Uh, exactly how big and heavy is this spider's crank in relation to the rest of its body, that snapping it off reduces his total body weight enough to give him more endurance?

    • Calypso_1

      not that big but it is denser than other tissue.
      “Li and colleagues found full-eunuchs weighed 9 percent lighter than intact males, and half-eunuchs weighed 4 percent lighter.
      They also found that full-eunuchs had 80 percent more endurance than intact males and half-eunuchs had 32 percent more endurance”

      I would think they would also want to look out how much metabolic expenditure was occuring for sperm production.

  • Broman

    Just find a girl spider that isn’t such a slut, jeez.

  • Raz

    Wireless insemination!  Very practical, but you can regret later.

  • Jesus

    I wonder if spiderman has “pulled this off”.

    • Sir Legendhead

      Haha oh man. That was a good one Jesus. :D

  • http://www.ContraControl.com/ Zenc

    Wait til the guys over at Eunuch.org get a look at this story.

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