A feasibility study of reintroducing wild boar Sus scrofa to Scotland: Are existing woodlands large enough to support minimum viable populations Original Research Article

The feasibility of reintroducing wild boar Sus scrofa to Scotland was investigated through the identification of a minimum viable population (MVP) and an assessment of suitable woodland habitat that could support such an MVP. A population viability analysis was performed, using the VORTEX software to establish an MVP. The sensitivity of the results to alternative modelling strategies was tested. An initial population of 300 individuals had a probability > 0·95 of surviving 50 years, and was identified as the MVP. Supplementation of the population with unrelated individuals was also simulated, and a range of strategies modelled. With a supplementation level of four animals every 5 years the MVP was reduced to just 10 animals. Based on a review of Sus scrofa ecology, woodland habitats suitable for supporting wild boar were identified. Only woodlands containing some stands of semi-natural origin were considered. The suitability of the three largest woodlands for supporting an MVP was further reviewed at site level. None could be considered optimum habitat for wild boar and none was large enough to support an MVP of 300 animals. The study concluded that the goal of establishing a self-sustaining population of wild boar in Scotland is unrealistic in the short term. Management options that would support a reintroduction programme are discussed.