For 10 points, name this behavior which is required for sexual reproduction.
Studying blackbirds, Gordon Orians proposed that territory quality created a threshold between two systems of this behavior. Emlen and Oring hypothesized that one system of this behavior occurred most frequently at highly clumped resources and total asynchronous temporal availability. The hotshot and hotspot hypotheses explain why individuals congregate at leks in the leadup to this (*) behavior. RA Fisher proposed "runaway selection" of traits that led to this behavior. The Hardy-Weinberg principle assumes that this behavior is random. Pair bonding is exhibited in species using the monogamous system of this behavior. For 10 points, name this behavior which is required for sexual reproduction.
Studying blackbirds, Gordon Orians proposed that territory quality created a threshold between two systems of this behavior.
mating [or word forms; prompt on sexual reproduction; prompt on polygyny or polygamy or monogamy]