ANT 154B Course notes- Lecture _9

Ant 154b course notes lecture 9

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Unformatted text preview: ANT 154BN Course notes Lecture #9: Infanticide 1 February 2011 Key terms and concepts are indicated in blue Outline 1. Why kill infants? 2. Who kills (and who should kill) infants? 3. Counterstrategies 4. Concluding comments 1. Why kill infants? Sexual selection hypothesis Figure 1. Parental investment in two infants during one inter-birth interval (IBIfull) with and without infanticide. 1 Killer to new s the full expected inter-birth period following the birth of the first infant if Here.we refer is IBIfull aalpha male (coincident disappearance of former alpha) that infant were to survive. The top timeline represents the situation where infanticide does not occur, while the bottom timeline includes an infanticide (marked byto infant; mates motherthe end killing infant. is one weaned infant 2. New M is not related the ‘X’). Without infanticide, at after of the IBIfull, there and a second, newborn infant. With infanticide, the first infant is dead leaving only the second infant which is of age IBIfull minus IBIReduction,months,...
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