Lecture23 - BioNB 2210: Lecture 23 Oct. 19, 2011 Lecture...

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BioNB 2210: Lecture 23 Oct. 19, 2011 Lecture 23: Families II: Cooperative Breeding Dr. Walt Koenig Families II: Cooperative breeding Main learning objectives: a) Learn about the diversity of cooperative breeding and some of the major questions raised by cooperative breeding systems b) Learn about the world’s most interesting bird, the acorn woodpecker 1) Importance of kin selection to helping behavior (Long-tailed tits) a) Everyone tries to breed initially b) Those that fail become ‘redirected helpers’ c) Who do they help? Strongly prefer kin (see figure). Confirms the importance of kin selection to helping behavior 2) Importance of sexual selection to cooperative breeding (Splendid fairy-wrens) a) Have some of the highest rates of EPFs of any species b) Males that molt early (who are also older males and usually dominants with helpers) get more EPFs (see figure on right). Sexual selection apparently key
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BioNB 2210: Lecture 23 Oct. 19, 2011 3) Sexual conflict in a cooperative polygynandrous system (Dunnocks)
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Lecture23 - BioNB 2210: Lecture 23 Oct. 19, 2011 Lecture...

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