Seasonality in Reproduction
Seasonal breeders: engage in sexual activity during certain times of the year.
Reproductive axis also varies with the breeding season.
Seasonal breeders: hamsters, sheep, deer, zebra finches, ferrets
Nonseasonal breeders: rats, humans, primates
Similar events within the reproductive axis are observed in males and females of species that are seasonal breeders.
No display of sex behavior