Área de vida e uso de espaço por Didelphis Albiventris Lund, 1840 (Marsupialia, Didelphidae) na Ilha Mutum, Rio Paraná, Mato Grosso do Sul, Brasil / Home-Range and Space Use by Didelphis albiventris (Marsupialia,Didelphidae) in Mutum Island, Paraná River, Mato Grosso do Sul State, Brazil




Home-Range and Space Use by Didelphis albiventris (Marsupialia, 13 Didelphidae) in Mutum Island, Paraná River, Mato Grosso do Sul State, Brazil. Home14 range is the area used by the animal in its daily activities. Home-range studies provide data on 15 species mating systems and territorial behaviour. The main goal was estimate the Didelphis 16 albiventris home-range in Mutum island, Paraná river, Brazil. The study was carried in 2008 17 from March to October on a 19,20ha length grid. The island is part of the Parana River Islands 18 and Floodlands Federal Environmental Protection Area, its vegetation is composed by 19 Alluvial Semideciduous Seasonal Forest and its climate is Subtropical Wet. The sampling effort was 3,360 traps/night and 152 Didelphis albiventris captures occurred. Forty-one Didelphis albiventris individuals were captured in 42 stations on the floor and at the two meters high traps. The animals were mostly terrestrial, independently of their age or sex. Four females and five males were captured at least five times were used to calculate home-range with minimum convex polygon. The estimated home-range average was 2,90 2,62ha, without significant statistical difference between males and females. An evidence of relation among area and individuals body mass was observed. Home-range overlaps occurred between males, females and males with females; the average overlap was 38.97%, which may demonstrate a promiscuous matching system. Looks like there is an evidence of female territoriality.


mínimo polígono convexo gambá-de-orelha-branca mata atlântica white-eared-opossum atlantic forest captura e recaptura ecologia habitat habitat capture-recapture minimum convex polygon

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