Biota Neotropica | |
Home-range and space use by Didelphis albiventris (Lund 1840) (Marsupialia, Didelphidae) in Mutum Island, Paraná river, Brazil | |
Vítor Quadros Altomare Sanches2  Mariuciy Menezes De Arruda Gomes2  Fernando De Camargo Passos1  Gustavo Graciolli2  Augusto Cesar De Aquino Ribas2  | |
[1] ,Universidade Federal do Mato Grosso do Sul Programa de Pós-graduação em Ecologia e Conservação Campo Grande MS ,Brazil | |
关键词: Atlantic Forest; capture-recapture; minimum convex polygon; vertical habitat use; white-eared-opossum; Mata Atlântica; captura-recaptura; mínimo polígono convexo; uso vertical do hábitat; gambá-de-orelha-branca; | |
DOI : 10.1590/S1676-06032012000400004 | |
来源: SciELO | |
【 摘 要 】
Home-range is the area used by an animal in its daily activities. Home-range studies provide data on species mating systems and territorial behavior. Our main goal was to estimate the Didelphis albiventris (Lund 1840) home-range in Mutum Island, Paraná River, Brazil. The study was carried out in 2008 from March to October on a 19.20 ha grid. The island is part of the Parana River Islands and Floodlands Federal Environmental Protection Area, with vegetation composed by Alluvial Semideciduous Seasonal Forest in a region of Subtropical Wet climate. The sampling effort was 3,360 traps-night resulting in 152 Didelphis albiventris (Lund 1840) captures. Forty-one Didelphis albiventris (Lund 1840) individuals were captured in 42 capture stations, composed by a trap placed on the floor and another in understory (2 m high). The animals were mostly terrestrial, independently of age or sex. Four females and five males, which were recaptured at least five times, were used to calculate home-range using the minimum convex polygon method. The mean home-range estimate was 2.33 ± 2.32 ha, similar to previous estimates provided by other methods, suggesting that our capture grid area, that was larger than usually applied for mark-capture studies for this species, have not underestimated the home-ranges. Evidences of the relation between individual home-range area and body mass were observed. Home-range overlaps occurred between males, females and males with females; the average overlap was 33.74%, which may be related to a promiscuous mating system, and suggests female territoriality.
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