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We examine the foraging behavior of stingless bees (Tetragonula biroi Friese)with regard to their preference of food location. The three factors consideredare distance of the food source from the hive, direction of the food source,and height of the food source from the ground. Single-factor experiments foreach factor were performed to determine the preferred food location.Statistical analysis shows that T. biroi species prefer the feeders located 1maway from the hive, which is the shortest distance used in the experiment.Results also show that this group of bees has no conclusive preferreddirection, which might be a result of non-apparent cause, such as randomsearch. In addition, the bees prefer the feeders located 1m above the ground,which are directly in front of the hive opening. Using the results from thesingle-factor experiments, a Three-Factor Factorial Experimental Design is usedto analyze the interaction of the three factors. Factorial Analysis of Varianceshows that the interaction among the three factors affects the preference ofthe bees. We hypothesize that the preference of the bees can be explained by(1) optimal foraging theory, (2) memory of food location, and (3) chemicalmarks left by conspecifics.

Foraging behavior of stingless bees (Tetragonula biroi Friese): distance, direction and height of preferred food source