BIOL 59200 Lecture Notes - Lecture 9: Operational Sex Ratio, Mating System, Promiscuity

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Mating systems: mating systems: factors that determine mating systems. Mating system = how mates are acquired, how many mates an individual will have, and patterns of parental care. One male restricts his matings to one female and female follows suit. This occurs for one breeding season or longer. Both parents are often involved in parental care. One male mates with several females in a breeding season by defending them directly. Female typically provides all of the parental care. One female mates with many males in a breeding season by defending them simultaneously or in succession. Male provides most if not all parental care. Both male and female have multiple partners within breeding season. General term for when an individual of either sex has more than one mate. If patches are evenly and broadly distributed, monogamy is likely. Hard to defend either resources or females. If patches are patchily distributed, polygamy is likely.

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