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Fig. 1. Schematic illustration of the set-up for scent-position experiments. The
set-up and protocol were similar to those used in the dual-distance
experiments. The main difference was that, in the scent-position experiments,
two groups of bees were separately trained to forage in separate tunnels
(Tunnels A and B). The rationale was to train bees to a particular location,
thereby allowing bees to learn a specific odometry reading, and then to
examine search behaviour in a situation where scent information conflicted
with the odometry reading. To this end, bees were tested either (1) in their
`own' training tunnel (e.g. Tunnel A) following a procedure to mimic shifting
of the tunnel (dummy-shift condition), (2) in their own tunnel immediately
following a training session (no-shift condition), (3) in the tunnel in which
the second group of bees were trained at a different position (unit 5/10
tunnel condition) or (4) in a fresh tunnel (Tunnel C) devoid of scent (fresh
tunnel condition).
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