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Fig. 2. Dance indications of native and transplanted bees under overcast conditions
on 28 July 2002. Each symbol represents the visual average of at least five
wagging runs during a single bout of dancing; each bee was scored only once
after a single trip to the feeder. The hive was at the south-facing treeline
(Fig. 1B), where the direction
to the feeder, and thus the correct dance indication, was 87.5° clockwise
(CW) of N (Current site, horizontal black line in each panel). The predicted
direction for dances oriented by memory of the sun's course at the
north-facing treeline (Fig.
1A), to which the transplanted bees were native, was 253.5°
(Natal site, horizontal gray line in each panel). (A) Bees native to the
current site; (B) newly transplanted bees released on the day of the
observations; (C) long-term transplantees, released at the current site 2-15
days earlier. Bimodal dances are indicated by broken vertical lines connecting
the two dance directions. The sky bar above each panel indicates sky
conditions: black indicates complete overcast; white indicates that the sun
was visible; shading indicates the sun peeking frequently in and out. There
were no periods of blue sky without sun. The sun first appeared at 8:22 h LST,
indicated on each panel by the thin vertical line running the entire height of
the graph. Statistical analyses here and below exclude dances occurring after
the sun first appeared.
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