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dvunkannon



Posts: 1377
Joined: June 2008

(Permalink) Posted: May 24 2013,12:19   

http://rsbl.royalsocietypublishing.org/content....3.short

Embryonic cannibalism in sharks.

Multiple males may fertilize a single female sand tiger shark. The embryos compete in her two wombs by eating each other.

One article I've read suggests this is sexual selection of the males, continuing after fertilization. I don't agree, since the genes are only half his.

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I’m referring to evolution, not changes in allele frequencies. - Cornelius Hunter
I’m not an evolutionist, I’m a change in allele frequentist! - Nakashima

  
  1753 replies since July 16 2008,08:10 < Next Oldest | Next Newest >  

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