How density-dependence and climate affect guanaco population dynamics

Guanaco density was significantly correlated with female newborn and adult annual survival while annual precipitation correlated significantly with the fertility (females born per female per year), in contrast to population regulation mechanisms commonly seen in other ungulate species. This guanaco model allows the evaluation of the effects of different events (e.g. offtake, particular dry or wet years, poaching) on specific sexes and life stages which is the field information commonly available.