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

Pâmela Castro Antunes, Marilena Altenfelder Arruda Campos, Luiz Gustavo Rodrigues Oliveira-Santos, Maurício Eduardo Graipel

Resumo


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.


Palavras-chave


Desterro Environmental Conservation Unit; Effects of temperature and rainfall; Sex ratio; Small rodents; Reproduction

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DOI: https://doi.org/10.5007/2175-7925.2009v22n2p143

Direitos autorais 2011 Pâmela Castro Antunes, Marilena Altenfelder Arruda Campos, Luiz Gustavo Rodrigues Oliveira-Santos, Maurício Eduardo Graipel

Licença Creative Commons
Esta obra está licenciada sob uma licença Creative Commons Atribuição 4.0 Internacional.

Biotemas. UFSC, Florianópolis, SC, Brasil, eISSN 2175-7925

Licença Creative Commons
Este periódico está licenciado conforme Creative Commons Atribuição 4.0 Internacional.