Who's afraid of the big bad boar? Assessing the effect of wild boar presence on the occurrence and activity patterns of other mammals

Wild boar are considered one the world’s worst invasive species and linked to biodiversity loss, competition for resources, predation of native species, and habitat modifications. In this study, we use camera traps to evaluate whether the invasive wild boar had an effect on the medium-sized mammal community of a protected area in southern Brazil. Based on photographic records, we evaluated whether the presence and relative abundance of wild boar was associated with a decrease in diversity or change in activity of medium-sized mammals. All comparisons were made between samples where wild boar were present or absent. The records of each camera during a season were considered a sample. The wild boar was the fourth most common species in the study area being present in 7.8% of the photographic records. The species richness of mammals was not negatively affected by the occurrence of wild boar and most common species did not exhibit changes in the daily activity pattern. However, we recorded an increase in the time elapsed between an observation of wild boar and the record of the next species relative to the average latency period observed among other mammalian species. This average latency period was similar to that observed in the case of large predators such as Puma, and its increase could be reflective partly of the avoidance of native species to wild boar. Nevertheless, our results show that the effect of invasive wild boar on the mammal community is not large as expected.

New records of Cuniculus paca (Rodentia: Cuniculidae) in a temperate grassland dominated landscape of the Pampa region of Brazil and Uruguay

is considered locally threatened in some parts of its range mainly because of hunting pressure and habitat loss. The species is widely distributed in South and Central America. Agouti’s distribution in Brazil is broad, although there is no information on its occurrence in the Northeast region and in the western part of Rio Grande do Sul state. The species presents a marginal distribution in northeastern Uruguay. Here, we describe 16 new records of the species in the Pampa region, including the western part of Rio Grande do Sul state, Brazil and Uruguay, expanding the