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Nature Macmillan Publishers Ltd 1998 letters to nature
 

Summary: Nature Macmillan Publishers Ltd 1998
8
letters to nature
714 NATURE |VOL 392 |16 APRIL 1998
part, by acquiring several two-dimensional views. The plots in
Fig. 2c, f and k indicate that ants may have adopted a strategy of
sampling more often close to the cone, where image size changes
rapidly, and less frequently further away, where image size is less
dependent on range. Sampling the cone at equi-angular separations
gives the ant a series of views that evenly covers the transformation
of the shape from its first sighting to the ant's arrival at its base
(Fig. 1e, f, g).
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Methods
Housing, training and testing ants. Ant nests were kept in large plastic tanks.
Individually marked foragers collected sucrose on a flat shelf (120 cm by 80 cm)
above the nest which they reached by means of a paper `drawbridge' (Fig. 1a).
Ants from one colony foraged for sucrose at the base of a black upright cone (7-
cm base, 12-cm height). The cone was inverted for ants from another colony.
Both cone types were present during the training for the choice experiment

  

Source: Andersen, Richard - Division of Biology, California Institute of Technology

 

Collections: Biology and Medicine