Partial seasonality of breeding in red-necked wallabies (Macropus rufogriseus banksianus)

Reproductive data on individually known free-ranging red-necked wallabies M acropus rufogriseus banksianus were obtained over a 6 year period. Although this subspecies is essentially a non-seasonal continuous breeder, more you ng wallabies emerged permanently from the pouch in spring than in any other season. This partial seasonality of breeding was the combined result of se asonal variation in duration of pouch lives, a tendency for the first young of females to emerge permanently in spring, and seasonal variation in the incidence of reproductive interruptions. It is proposed that the adaptive s ignificance of this partial seasonality is that it maximizes juvenile survi val while maintaining a high reproductive rate.