BIOL 115 Lecture Notes - Lecture 21: Marlene Zuk, Cochlea, Mate Choice
Document Summary
Ii. if female crabs prefer mating with males that have larger claws, over time the population will have larger and larger claws because the one with the bigger claws will be the ones reproducing. B. the average reproductive success is equal (all have a mother and father) but the reproductive skew is high for males because some can produce and some can"t: a steeper bateman"s gradient. Iv. the choosy sex: whichever sex has greater investment in reproduction will be more selective about who to mate with. Gradient: bateman"s hypothesis that there is a relationship between mating success and reproductive success: if investment limits the reproductive output for females but not males then mating more frequently only improves reproductive success for the males. Models and hypothesis: sexy sons/fisher"s runaway selection model, when a females in a population show a preference for a particular characteristic, this hypothesis produces extremes traits that are contrary to natural selection.
