Translator Disclaimer
1 May 2000 SMALL MAMMALS IN AGRICULTURAL AREAS OF THE WESTERN LLANOS OF VENEZUELA: COMMUNITY STRUCTURE, HABITAT ASSOCIATIONS, AND RELATIVE DENSITIES
Author Affiliations +
Abstract

We used mark–recapture and removal trapping during 37 months to examine structure of small-mammal assemblages in agricultural and pastoral areas on the western llanos of Venezuela. Among 34 sites sampled, species richness, diversity, population densities, and relative contribution to the assemblage by 10 rodent and 3 marsupial species varied by habitat or land-use category, major vegetative formation, and (within agricultural systems) crop species. Most habitat types, especially relatively uniform areas of mechanized agriculture, were numerically dominated by 2 rodents, Sigmodon alstoni and Zygodontomys brevicauda. Subsistence agriculture plots were more variable and had the highest species richness and diversity. Peridomestic habitats were dominated by Rattus rattus. In contrast to findings in agroecosystems in the United States and Argentina, relative densities were not lower in crop fields than in adjacent borders nor were there differences in the structure of the rodent assemblages. Captures of Heteromys anomalus, Oecomys speciosus, and Oecomys trinitatus document range extensions for these species on the western llanos.

Antonio Utrera, Gloria Duno, Barbara A. Ellis, Rosa A. Salas, Nuris de Manzione, Charles F. Fulhorst, Robert B. Tesh, and James N. Mills "SMALL MAMMALS IN AGRICULTURAL AREAS OF THE WESTERN LLANOS OF VENEZUELA: COMMUNITY STRUCTURE, HABITAT ASSOCIATIONS, AND RELATIVE DENSITIES," Journal of Mammalogy 81(2), 536-548, (1 May 2000). https://doi.org/10.1644/1545-1542(2000)081<0536:SMIAAO>2.0.CO;2
Accepted: 8 July 1999; Published: 1 May 2000
JOURNAL ARTICLE
13 PAGES

This article is only available to subscribers.
It is not available for individual sale.
+ SAVE TO MY LIBRARY

SHARE
ARTICLE IMPACT
RIGHTS & PERMISSIONS
Get copyright permission
Back to Top