Ecology and natural history of Akodon lindberghi (Rodentia, Sigmodontinae) in southeastern Brazil

Iheringia. Série Zoologia

Diego Queirolo¹  Marco A. M. Granzinolli¹ 

[1] ,Universidade de São Paulo Instituto de Biociências Departamento de EcologiaSão Paulo SP ,Brazil

关键词: Akodon lindberghi;    reproduction;    abundance;    body mass;    population structure;    Akodon lindberghi;    reprodução;    abundância;    massa corporal;    estrutura da população;   

DOI  :  10.1590/S0073-47212009000200011

来源: SciELO

【 摘 要 】

We studied the ecology and natural history of the globally threatened and poorly known Akodon lindberghi Hershkovitz, 1990 in Parque Nacional da Serra da Canastra (PNSC) and Juiz de Fora (JF), southeastern Brazil. From November 1998 to September 2001 a total of 131 individuals were captured in wire-cage live-traps and 52 by pitfalls traps. They were all marked and released at the site. The largest abundances were registered during the dry season, and most of the captures occurred in open habitats. The mean body mass of the two populations was significantly different (18.1 g at PNSC versus 13.1 g at JF; H = 46.2678, g.l.=2, p<0.001). In PNSC, individuals were reproductively active from August to February, and juveniles were present from May to August. The results suggest that the changes in vegetation structure caused by deforestation and intensive agricultural activities could increase the predation rate, affecting the mean body mass of the population.

【 授权许可】

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