- Full text PDF available (1)
We examined the spatial implications of maximum flight distance for several species of stingless bees. Data suggested that maximum flight distance in Meliponini is a function of body size, especially generalized wing size, which can be estimated through principal component analysis. For six species of stingless bees, flight distances and generalized wing… (More)
Twenty-two randomly taken morphological characters were used in order to estimate the Mahalanobis generalized distance between diploid males, diploid workers, haploid males and triploid workers. It was found that adult diploid males are metamales and triploid females are slightly masculinized. These facts indicate that the maleness genesare slightly… (More)
In this study, the daily and seasonal influences of abiotic factors and the amount of floral resources on the foraging frequency of bees were determined. The experiments were performed, during 12 consecutive months, in the main floral sources used by bees in a secondary forest fragment. The foraging frequency of each bee species on flowers of each plant was… (More)
The interaction between floral visitors and plants in natural ecosystems has become a major subject in studies on biodiversity conservation. However, there is a very complex interaction between the community of floral visitors and the plant species foraged by them in the natural environment and little is known about the foraging activity of these visitors.… (More)
Malformed antennae of Apis mellifera light ocelli drones were drawn, dissected and mounted permanently on slides containing Canada balsam, in order to count the olfactory discs present in each segment, in comparison with the number of those structures in normal antennae of their brothers. Some drones presented morphological abnormalities in a single segment… (More)
Some factors influence the distribution of abundance of floral visitors, especially the amount and quality of the floral resources available, the size of the area occupied by the visitor, habitat heterogeneity, and the impact caused by natural enemies and introduced species. The objective of this research was to evaluate the distribution of abundance of the… (More)
59 diploid drones of Apis mellifera adansonii, 12-37 days old, were tested for the presence of semen after provoked ejaculation; 13 drones ejaculated semen enough to be used in an instrumental insemination, but only three on them (5%) furnished 1 mm3 of semen. The problems referring to the attainment of descendants from the 2n drones are briefly discussed.