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Hermaphrodite Sea Slug Mates With Throwaway Penis


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#1 dudeone

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Posted 12 February 2013 - 07:22 PM

Hermaphrodite Sea Slug Mates With Throwaway Penis

By Tia Ghose, LiveScience Staff Writer | LiveScience.com – 2 hrs 7 mins ago


http://news.yahoo.com/hermaphrodite-sea-slug-mates-throwaway-penis-001103527.html

A bizarre, hermaphrodite sea slug may give new meaning to the word "quickie." The nudibranch uses a disposable penis to have sex more frequently, according to a new study.


The animal, described today (Feb. 12) in the journal Biology Letters, is the first discovered to use an easily regenerated, disposable penis.


Nudibranches are simultaneous hermaphrodites, meaning that they have penises that they use to fertilize others as well as female sex organs. But exactly how their sex worked remained a mystery.


To find out, Ayami Sekizawa, a biologist at Osaka City University, and his colleagues collected specimens of the nudibranch Chromodoris reticulata while scuba diving off Okinawa, Japan. They then put 31 pairs of the creatures together in an aquarium and watched as they mated. [The Animal Sex Quiz]


When the sea creatures copulated, they unfurled part of a long penis coiled up like a fire hose inside their bodies. The creatures then simultaneously penetrated one another with their penises (which are covered in backward-pointed spines), and after tens of seconds to a few minutes of sea slug sex, separated.


The slugs then discarded the penises (or at least the extended portion of them), similar to how geckos shed their tails. After about a day, the nudibranches were ready to mate again, at which point they projected the penis section that was previously hidden internally. One frisky slug actually had sex three times in three days. After the slugs finished with sex, and their cast-off penises, the spiral portion of the penis forms more cells that will eventually grow into the next penis, the researchers hypothesize.


Because the sea creatures often live in dense groups where sexual competition is fierce, the findings suggest that the use of the coiled, compressed penis can give nudibranches a leg up by allowing them to have sex more frequently, the researchers write in the paper.


Having a disposable penis may also enable nudibranches to scrape out rivals' sperm while sidestepping the difficult removal of a penis covered in backward-pointed spines from their partners.


"Chromodoris reticulata may compensate for the short-term cost of decreased reproductive opportunities caused by the loss of a penis with the reproductive advantage gained by sperm displacement under severe sperm competition," the authors write.

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#2 cadillaccts

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Posted 12 February 2013 - 07:34 PM

Do you expect this to spark an insightful conversation?

Who needs to keep up with the most retarded world news stories when CDC has dudeone at the helm.
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#3 hudson bay rules

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Posted 12 February 2013 - 07:38 PM

Kicking us in the nads is still not kosher ladies.
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I love rock and roll, just put another dime in the juice box baby.

#4 Mr. Ambien

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Posted 12 February 2013 - 07:40 PM

Can dudeone have his own topic for articles that aren't even newsworthy?
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#5 That's What She Said

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Posted 12 February 2013 - 07:56 PM

That's a neat anecdote, sport!
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Why not Zoidberg? (\/)(°,,,°)(\/)

#6 aeromotacanucks

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Posted 12 February 2013 - 08:18 PM

Nature, Nature, Nature.

always surprising us and ALWAYS giving reasons for Humans´ dirty minds to laught about something really "natural"...
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Shup up and fly! you´re not payed to think, you´re payed to fly!

#7 Aladeen

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Posted 12 February 2013 - 08:34 PM

Nature, Nature, Nature.

always surprising us and ALWAYS giving reasons for Humans´ dirty minds to laught about something really "natural"...

did someone say throw away penis?
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#8 canucks since 77

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Posted 12 February 2013 - 08:56 PM

Is this a thread on lady GAGA?
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Politeness is the first step to respect!

#9 key2thecup

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Posted 12 February 2013 - 09:35 PM

That's a neat anecdote, sport!


your sig's making me hungry!
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Dr. Ron Paul 2016!

 


#10 Beer-League-Goalie

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Posted 12 February 2013 - 11:25 PM


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#11 CanuckRow

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Posted 12 February 2013 - 11:26 PM

Weirdest thread title i've ever seen.
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15yezck.jpg

 

 @Chel24Seven


#12 pwnstar

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Posted 13 February 2013 - 04:28 PM

Random thread of the year?
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#13 avelanch

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Posted 13 February 2013 - 10:30 PM

http://www.youtube.com/watch?v=VDss8V2OME4

beat me to it :P
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#14 Jai604

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Posted 14 February 2013 - 05:43 AM

What is this, I don't even
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RIP LB RR PD


#15 :D

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Posted 14 February 2013 - 05:51 AM

I'm fine with my penis hanging around, but if I could dump these balls whenever I wasn't using them, that would be super
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#16 Armada

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Posted 14 February 2013 - 11:25 AM

Damn Nature!
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______________Eat, Sleep,Posted ImageRave, Repeat

#17 D-Money

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Posted 14 February 2013 - 04:14 PM

Dating myself, but anyone remember...?


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