Resumen

ORTEGON-MARTINEZ, David A.  y  PEREZ-TORRES, Jairo. STRUCTURE AND COMPOSITION OF THE BAT ASSEMBLAGE ASSOCIATED TO A SHADE COFFEE PLANTATION IN MESA DE LOS SANTOS (SANTANDER), COLOMBIA. Actu Biol [online]. 2007, vol.29, n.87, pp.215-228. ISSN 0304-3584.

The structure and composition of the bat assemblage on the shade coffee plantation at 'El Roble' farm (Santander), Colombia, located at 1.650 m of altitude was described between September and November 2003. Due to the spatial heterogeneity of the area a cluster sampling design was chosen. Five sampling zones or clusters corresponding to 3 habitat types were sampled using mist nets at 2 different heights. All captured bats were measured, aged and its reproductive condition was determined. Fecal samples were collected. A total of 147 individuals from 11 species belonging to Phyllostomidae (10 species) and Vespertilionidae (1 species) families were captured. The most abundant species were Sturnira lilium, Artibeus lituratus, and Carollia brevicauda, this dominance pattern along with the presence of Phyllostomus discolor (Phyllostominae) suggested, that the shade coffee plantation at 'El Roble' farm, is in similar conservation conditions to primary and secondary forests with a low intervention degree. Trophic values and importance values were used to describe the trophic structure of the assemblage wich was dominated by sedentary frugivores, followed by foliage gleaner insectivores, nomadic frugivores and aerial insectivores, respectively. When proportions of the trophic groups among habitats were compared by using the Odds ratios technique, each trophic group presented a higher probability to be captured in a different habitat type than the other trophic groups. In the particular case of the sedentary and nomadic frugivores this was explained in terms of its feeding strategies.

Palabras clave : Chiroptera; Colombia; composition; shade coffee plantations; structure.

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