Movement patterns of five species of small mammals in a Brazilian restinga

Abstract

During the course of a population study of small mammals in a Brazilian coastal shrubland we calculated the movements between successive captures, the residence time, the indices of aggregation and the kinds of movements of the five most common species of small mammal. A capture-mark-recapture study was undertaken over two years, quarterly.Philander opossum, Akodon cursorandProechimys iheringipresented low mobility, with a high proportion of restricted movements, long residence time and larger coefficients of aggregation.Didelphis auritaandMetachirus nudicaudatuspresented higher mobility and exploratory movements, short residence time and small coefficients of aggregation. The species with lower mobility had permanent populations within our sampling grid, while the species with higher mobility used areas outside the grid, presenting no local populations but occupying portions of regional metapopulations.