Navegando por Autor "Rosa, Clarissa Alves da"

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Factors affecting space use by wild boars (Sus scrofa) in high-elevation tropical forests.
(2019) Morais, T. A.; Rosa, Clarissa Alves da; Azevedo, Cristiano Schetini de; Viana-Junior, A. B.; Santos, P.; Passamani, Marcelo
The wild boar (Sus scrofa Linnaeus, 1758) is considered one of the 100 worst invasive species in the world and is present in the high-elevation forests in Brazil. Our objective was to understand how landscape and atmospheric conditions affect space use by wild boars. We hypothesized that wild boars would be more frequent at lower elevations, warmer and wetter forested areas, and away from human disturbances. After three years of data collection (2013–2016) using 16 camera traps, 881 independent records were obtained with a mean of 4.44 ± 9.25 pigs per record. Wild boar frequency of occurrence was higher at lower elevations, in more humid and warmer areas, and farther away human disturbance factors, corroborating our initial hypothesis. Understanding space-use patterns of wild boars is necessary for the design of management strategies that target areas of more intense usage, as well as for defining more effective population-control techniques.
The infuence of population‑control methods and seasonality on the activity pattern of wild boars (Sus scrofa) in high‑altitude forests.
(2020) Morais, Tatiania de Assis; Rosa, Clarissa Alves da; Viana Junior, Arleu Barbosa; Santos, Antônio Pedro; Passamani, Marcelo; Azevedo, Cristiano Schetini de
The wild boar (Sus scrofa) is a problematic invasive species which has colonized the threatened Brazilian Atlantic Forest. Our objective was to evaluate if population control and seasonality afect the circadian rhythm of wild boar activity. Wild boar activity was monitored by camera-traps for 1 year without population-control methods and 1 year with populationcontrol methods implemented in the area. Before population control was implemented, wild boar activity was uniform across 24 h, with animals being active at any given time (cathemeral). After the population control, wild boars concentrated their activities on the daylight period. Also, wild boars were more active during the wet season, possibly infuenced by the presence of seeds of Araucaria angustifolia trees. Based on these results, control measures should be conducted during the wet season and diferent management strategies, such as the use of rifes with telescopic sights and silencers, should be tested.