BIOL 1013 Lecture Notes - Lecture 15: Behavioral Ecology, Sexual Selection, Ovulation
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What is it: displays, dances, rituals, calls, nest building, food provisioning, bower building (shaded structure to reside in, other things . Why: increased survival, increased reproduction, 3 functions: Stimulation of hormonal changes in participants (e. g. , initiating ovulation in females) Natural selection- differential reproduction of organisms based on inherited traits. Sexual selection can lead to extreme sexual dimorphism, a situation in which the two sexes look very different: body size, ornamentation, color. Males- selected traits that may represent fitness directly or indirectly. Leks- gatherings where females pick the male that impresses them the most. Male-male competition is a common type of intrasexual selection. Monogamy- neither the male nor the female have another sexual partner. Polygamy- either males or females have multiple partners. Paternity confidence- the amount of care provided to young also differs among animal species. Animals increase their confidence in paternity in several ways. Inserting a plug that prevents other sperm from entering.