Fig 1.
Maps of Collserola Natural Park, Barcelona, NE Spain, showing a) the different habitats and b) Controlled Game Area, currently the only hunting areas in the whole massif.
Table 1.
Wild boar harvested and abundances in Collserola Natural Park from 2000 to 2014.
Table 2.
Input data used in the model scenarios of the Collserola Natural Park wild boar population.
Life history and population attributes: A) Reproduction values; B) Mortality and environment values. EV: Environmental variation.
Fig 2.
Predicted wild boar population trends.
Future scenario results showed a progressive increase in the Collserola Natural Park final population size of: 1,673 wild boar for a K value (Hypothetical population threshold: Anthropogenic food resources availability) of 3,000, 2,281 wild boar for a K value of 4,200 and up to 3,304 wild boar for a K value of 6,400. Lines indicate SE.
Fig 3.
Impact of different parameters on wild boar population size according to the sensitivity tests.
Total decrease (impact) in the wild boar population size of the Collserola Natural Park, Spain, for each parameter tested. K, Hypothetical population threshold: Anthropogenic food resources availability; M, Mortality; B, Breeding; J, Juveniles; Y, Yearling; A, Adults.
Fig 4.
Effect of different parameters on wild boar population size according to the sensitivity tests.
Wild boar population size of Collserola Natural Park, Spain, decrease for every 10% change of each of the parameters tested (A, Hypothetical population threshold: Anthropogenic food resources availability K value (Hypothetical population threshold: Anthropogenic food resources availability); B, male mortality; C, female mortality; D, breeding; E, breeding females). Breeding is the mean percentage of wild boar that breed in a given year (*, reference value).
Table 3.
Sensitivity test results for the different parameters tested.
Table 4.
Evaluation of the management strategies assessed in the model.
Fig 5.
Predicted wild boar population trend under different management strategies.
Results of testing the management strategies for the wild boar population of Collserola Natural Park, Spain, in the future scenario show different effectiveness, was a) 80% for the idealistic option (annual decrease of 15% during 5 years), 86% for the realistic option (annual decrease of 5% during 15 years) for the decrease of anthropogenic food resources strategy and 72% for the Selective harvest strategy; and b) 100% for the Combined strategy.
Fig 6.
Effects of different harvest values.
Sensitivity test outcome showed the relationship between wild boar population size trend and the different harvest values, from 40 to 70 juveniles and yearlings of each sex in the Collserola Natural Park, Spain.