Resumen

PARDO, LAÍN; JIMENEZ, LUDWIG  y  UNIVERSIDAD NACIONAL DE COLOMBIA, SEDE BOGOTA. COLOMBIA. Departamento de Biología, Facultad de Ciencias. Observation of Flight Ranges of Bombus Atratus (Hymenoptera: Apidae) in Urban Environments. Acta biol.Colomb. [online]. 2006, vol.11, n.2, pp.131-136. ISSN 0120-548X.

The return capacity of Bombus atratus to its colony was studied by measuring the quantity of individuals that returned to it, after being released at different distances and in four directions (north, south, east, west). We located a colony of B. atratus coming from Tenjo, Cundinamarca, at the Department of Biology, Universidad Nacional de Colombia, Bogotá. We marked and released a total of 100 workers of which 40 returned. There was a clear negative relationship between the proportion of bees returning to its nest and the distance from the released site, decreasing the number of bumblebees able to return as it increased the distance to the nest. The observed maximum range to which the bees found their nest was between 1,300 m and 1,500 m and a lineal regression analysis predicts a flight range of 1.6 km.

Palabras clave : flight range; orientation.

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