BIOSC-101 Lecture Notes - Lecture 30: Mate Choice, Opistognathidae, Internal Fertilization
21 Dec 2020
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Population one species ( numbers, patterns over space or time) How animals make decisions that influence survival and reproductive success (fitness) Sexual selection individuals with certain inherited characteristics are more likely than others to obtain mates. 2 major categories of sexual selection: intrasexual selection (within same sex, intersexual selection (different sexes) Mating systems and behavior (2 major categories: 1 male, 1 female monogamy. May see more intersexual selection (behavior) e. g. grebes (dance: 1 male, > 1 female or 1 female, >1 male polygamy. May see more intrasexual selection e. g. stalk-eyed flies. E. g. red-winged blackbirds where the male and female share a nest but 34% of nestlings fathered by neighboring male (molecular approaches used) Needs of the young are key in the evolution of parental care. Needs of the young are an important factor in the evolution of parental care. As tadpoles, no. (mother carries across forest to h2o pools, feeds with unfertilized eggs)
