11:067:327 Lecture 12: Reproductive Behavior
17 Jan 2019
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Document Summary
Reproductive behavior: male reproductive behavior: male sexual behavior, polygynous mating system of agriculture animal species (few males needed) Breeding programs, especially single-sire and a. i. leads to relaxation of natural selection on sexual performance traits. Sexual selection (sex drives evolution: a form of natural selection. Individuals have differential reproductive success based on competition for mates. Intrasexual selection: males will frequently fight each other for a female or for a desirable territory to attract a female, one possible outcome: studs. Quantitative variation: large quantitative variation exists, breeding programs, especially single-sire and a. i. leads to relaxation of natural selection on sexual performance traits, one possible outcome: duds. Two phase of male sex behavior (same as when they are hungry/eating: appetitive phase: sex drive/libido=the powerful motivational forces propelling individuals to seek copulation, consummatory phase: copulatory behaviors. Sexual stimulation: facilitation (good for artificial insemination, change the stimulus, change the location.
