Journal
BEHAVIORAL ECOLOGY AND SOCIOBIOLOGY
Volume 54, Issue 1, Pages 80-87Publisher
SPRINGER-VERLAG
DOI: 10.1007/s00265-003-0607-2
Keywords
Apis mellifera; honeybee; communication; foraging; recruitment
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We analyzed the foraging and recruitment activity of single foragers (Apis mellifera), exploiting low reward rates of sucrose solution. Single employed foragers (test bees) were allowed to collect 2.0 m sucrose solution delivered by a rate-feeder located at 160 m from the hive for 2 h. Flow rates varied between 1.4 and 5.5 mul/min. The individual behavior of the test bees was registered both at the hive and the food source, and the social output was calculated as the number of incoming bees arriving at the feeder per hour (henceforth: arrival rate). Incoming bees were captured once they landed at the feeder and assigned to one of three categories according to their foraging experience and hive interactions with the test bee: inspector, reactivated, or inexperienced bees. Both the waggle-runs performed per hour of foraging by test bees and the social output attained, increased with the reward rate. Also the number of hive-stays and the trophallactic-oftering contacts performed by test bees were positively correlated with the arrival rate. For the highest reward rates, the duration of Nasonov-gland exposure at the feeding place was higher, and the arrival of most of the incoming bees occurred shortly after the test bee landed at the feeding platform. Thus, in addition to hive-interactions, landing of incoming bees at the food source is promoted by olfactory and/ or visual information provided by the test bees. The proportions of inspector, reactivated, and inexperienced bees changed depending on the reward rate offered. Therefore, not only the occurrence and intensity of the recruitment-related behaviors performed by the test bees, but also the stimulation required by each category of incoming bees, determined the social output observed.
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