Population dynamics of Euryoryzomys russatus and Oligoryzomys nigripes (Rodentia, Cricetidae) in an Atlantic forest area, Santa Catarina Island, Southern Brazil

• Autor(es): Antunes, Pâmela Castro ; Campos, Marilena Altenfelder Arruda ; Oliveira-Santos, Luiz Gustavo Rodrigues ; Graipel, Maurício Eduardo
• Data: 2009
• Origem: Oasisbr
• Tipo de Documento: Artigo científico
• Idioma: Português

Descrição

The population dynamics and reproductive issues of two species of rodents of the family Cricetidae, Rice Rats (Euryoryzomys russatus) and Pygmy Rice Rats (Oligoryzomys nigripes), were studied for 24 months in an Atlantic Forest area in southern Brazil. Euryoryzomys russatus presented density-dependent population fluctuation, and recruitment was positively associated with temperature. Oligoryzomys nigripes displayed the lowest abundance, greatest population fluctuation and shortest permanence time. Abundance and survival were found to be negatively correlated with temperature. The sex ratio was not biased in any of the species.