During the populace stage, your event to many mating, and so several paternity, may possibly be determined by the sheer number of men undergone simply by receptive women. People investigated 3 potential aspects encounter that is influencing. Very first, their sex that is operational (OSR) was men biased inside north h2o snakes but could differ significantly around ages (Brown to Weatherhead, 1999b; Weatherhead et al., 1995). The prediction was tested by us which, once the OSR gets to be more men biased, their incidence out of numerous paternity grows. 2nd, people tested each prediction which numerous paternity will be more frequent in many years if the mating season are reasonably protracted.