Human-induced reductions in species’ ranges have resulted in the geographic separation of some previously sympatric species that interacted historically. Some previously co-occurring species are now being reconnected via translocation. However, interactions between these species can be difficult to predict, particularly in extreme instances where all populations of previously co-occurring species have become completely separated from each other.
The density of rabbits (Oryctolagus cuniculus) in the modified tussock grasslands of the Mackenzie Basin, South Island, New Zealand, in August-September 1991 was determined within 26 I-ha quadrats spread over 1000 ha. The area was poisoned with 1080- carrot baits and dead and live rabbits counted. The overall kill rate was 93%. Wide variability in rabbit densities amongst the quadrats was correlated with burrow density, but vegetation was not a significant predictor of rabbit numbers. High density quadrats were not all spatially clumped together.