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Fig. 1. Results of experimental Series I carried out in the AWBFF (indoor) at the
Australian National University. A pair of blue/white gratings oriented at
45° or 135° to the horizontal was used at the feeder and the hive. The
results indicated that trained bees can reverse their pattern preference
following midday breaks, as well as an overnight break, both at (A) the feeder
and (B) the hive. The modulation of the average choice frequency, with
reference to 45° grating can be approximated very well by a sinusoidal
curve with a frequency of 0.52, i.e. a period of 12 h. The correlation
coefficient are 0.98 for the feeder and 0.998 for the hive, respectively.
Terminology for the test types: M, morning; A, afternoon; H, hive; F, feeder;
1, early; 2, late. ***P<0.001. See text for further
details.
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