Melomys population monitoring
To determine whether the arrival of a novel predator resulted in
demographic impacts (population size and survival) to a native prey
species, we monitored four “impact”, quoll-invaded sites established
in the north of Indian island in the vicinity of where quolls were
released and three “control”, quoll-free sites established in the
south of the island (Fig. 1). Populations of melomys on Indian Island
were monitored during four trips occurring immediately prior to the
introduction of quolls in May (site 1) 2017, and after the introduction
of quolls August 2017 (sites 2–7), April 2018 (sites 1–7), and May
2019 (sites 1–7).