BIO 115 Lecture Notes - Lecture 32: Live Fast, Die Young (Film), Pair Bond, Natural Selection
Document Summary
Monogamy: one male pairs with one female. Sexual: partners mate with each other exclusively. Pair bonding species are not necessarily monogamous. Females sneak off to mate with other males, while her male is building the nest. Mating systems evolve because of the benefits and costs they confer on for their eggs. males and females. Can depend on opportunities that arise from sexual selection. In some species, a combination of systems evolves. Females who choose males with attractive traits pass alleles to their offspring that influence expression of the trait and the preference. Leads to stronger preferences and larger display traits. Although traits that attract females may be arbitrary initially, they allow females. Costly display traits are more reliable indicators of male quality to choose the highest quality males. May fly: live fast, die young strategy. Limited amount of energy to invest in survival, maintenance, and reproduction. Natural selection expected to optimize in light of trade-offs.
