Topic 10: Parental tactics, brood parasitism relative investment , infanticide

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4 Terms

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Hypotheses of Relative Investment by females and males

Hypothesis #1

  • males may abandon eggs because his costs were low

Hypothesis #2

  • probability close to 1 that parental behavior goes to her own genetic brood, no matter how many males are involved

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Hypothesis for Infanticide

A) Predation hypothesis

B) Resource competition hypothesis

C) Adoption avoidance hypothesis

D) Sexual selection hypothesis

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Density-dependent effect

When population density is high, more unmated males are around, so infanticide happens more; when density is low, fewer unmated males → less infanticide.

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Sex allocation theory

Predict parents will invest more in the sex with the higher fitness potential