Primates 2

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1. Why are humans altricial

  • extra uterine pregnancy, babies brain is too big, has to be born early even though are K selected
  • really r selected not K selected
  • cooperative breeding means dont need to be precocial
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2. Ontogenesis

  • development in the womb
  • Individual development
  • evolution of a lineage

3. Fast breeding

  • unpredictable environment, not limited by K only by r,
  • stable environment, limited by K not r

4. why is sex ratio male biased

  • more M miscrriages, fewer repair mechanisms for males, a less fit male will not go to term
  • males are the fitter sex so more survive in the womb
  • males are more beneficial for female survive as can have more offspring than females

5. The intesnity of the male gibbon code

  • Signals fitness of the f and M holding powe
  • signals fitness of the M
  • signals strength of pair bond
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