PSYO 2160 Lecture Notes - Lecture 3: Haplodiploidy, Inclusive Fitness, Acorn Woodpecker
10 Jan 2018
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They give alarm calls when there is a predator nearby. Predictions: emlen"s =n;l the xxx stay at home, will stay and increase indirect fitness until reproduction becomes available elsewhere, almost all dispersed once given mating opportunities. Eusociality: all hymenopteran species = haplodiploid, monandrous, one female and many males. Some hymenopteran species = eusocial: some monandrous queens: single mate, some queens polyandrous : multiple mates. Infanticide: male kills children that aren"t theirs (a lot in chimpanzees: bruce effect: if new male comes along and female is pregnant, presence causes female to abort fetuses. Sibling rivalry: offspring r=0. 50 to sibling, can gain some inclusive fitness by helping siblings survive, higher conflict when resources from mother are limited, obligate siblicide: sibling is killed, parents may discourage or accept siblicide, ex. Egrets peck each others" heads until the siblings leave. Facultative siblicide: siblicide may or may not occur based on environmental conditions.
