Hatena::Groupastrobot

polygyny

polygyny

http://f.hatena.ne.jp/images/fotolife/a/astrobot/20111001/20111001155347.jpg

  • poly - many, gyny - "female" /一夫多妻制
  • single male and multi-females
  • small group size (2~3 females)
  • resident male gets "tenure" in terms of reproduction
  • age-granded
    • 若いオスは、silver-bucks、自ら去る
    • e.g., Gorilla