Summary: Self-organized defensive behavior in honeybees
The paper discusses the defensive behavior in honey bees observed under ... associated with the self organization observed in each honey bee leading to an ... Provides an understanding of the link between individual behaviors and the.
Summary: Self-organized defensive behavior in honeybees. Overview: •
The paper discusses the defensive behavior in honey bees observed under controlled experimental conditions. Positive and negative feedbacks are associated with the self organization observed in each honey bee leading to an emergent collective response.
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Experimental results and a model to describe the results are given in the paper.
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Explanation for characteristic features of the honey bee defensive response (viz. ability of colony to localize and focus its attack, inter- and intra-hive variability and ability of colony to amplify small differences between targets).
Experimental setup: •
45 experiments on 5 hives with population between 20,000 and 40,000 worker bees (European honeybees: Apis mellifera mellifera)
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3 sets of experiments were done. Targets were black leather patches. In first set, two identical targets were used. In second set, one of the targets had received 3 stings before the experiment began. And in the third set, a single larger target was used to observe the spatial distribution of the stings. Targets were connected to a pendulum system for motion.
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To get the hive responsive attack, the hive was struck in a uniform manner 3 times at intervals of 40 seconds and the targets were removed after 2 minutes.
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Intervals of 2 days were kept for each colony between each experiment.
Results: •
In first experiment, a relationship between the mean fraction of stings on the winning lure (Lmax/N) and the total number of stings is given in fig. 1. N is the total number on stings on both the lures.
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A pitchfork bifurcation as a function of control parameter N is seen indicating a competitive positive feedback, which amplifies an initial fluctuation.
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The relation ship has 3 regions (a, b & c). Region a (N
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