Sexual Dimorphism

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Dimorphic niches• Fecundity selection– For large females size = fecundity• Protandry– Early male maturity at size = mating
<strong>Sexual</strong> selection• Male preference for larger females• Small male size for display agility• Large male size confers advantage– Male-male competition– Nest defense against predators
Page 1 and 2: Sexual Size Dimorphism iscommonMale
Page 3 and 4: Optimal body size differsDisruptive
Page 5: Resource division• Food competiti
Page 9 and 10: Why?• Sexual selection• Resourc
Page 11 and 12: AllometryPower Law:y ∝ x blog(y)
Page 13 and 14: Allometry of SSDMain large scale pa
Page 15 and 16: Rensch’s Rule: female-biased SSDA
Page 17 and 18: Hypotheses• Rensch’s Rule: b >
Page 19 and 20: Female Biased SSDFemaleMale
Page 21 and 22: Dimorphism and Latitude0.400.36R 2
Page 23 and 24: SSD and alternative tactics• Fema

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