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Fig. 3.7. (a) Proportion of visits by 24 Bombus impatiens workers to the low-variance flowers that provided 1 |xl of 30% sucrose with p = 1.0. The high-variance flowers provided 10% or 50% in random sequence with p = 0.5. The dotted line shows the behavior of risk-indifferent bees. (b) As an estimate of the bumble bees' subjective evaluation of nectar concentration, I have reproduced the graph from Fig. 3.2 on the relationship between dance rate and concentration for the honeybee. The perceived concentrations are shown for the high- and low-variance flowers by projecting concentration onto the perceptual scale (y axis). The arrows indicate the perceived expected concentration for the high (H) and low (L) variance flowers. The subjective evaluations of concentrations may differ in detail for bumble bees and honeybees.

Sucrose concentration (%)

Fig. 3.7. (a) Proportion of visits by 24 Bombus impatiens workers to the low-variance flowers that provided 1 |xl of 30% sucrose with p = 1.0. The high-variance flowers provided 10% or 50% in random sequence with p = 0.5. The dotted line shows the behavior of risk-indifferent bees. (b) As an estimate of the bumble bees' subjective evaluation of nectar concentration, I have reproduced the graph from Fig. 3.2 on the relationship between dance rate and concentration for the honeybee. The perceived concentrations are shown for the high- and low-variance flowers by projecting concentration onto the perceptual scale (y axis). The arrows indicate the perceived expected concentration for the high (H) and low (L) variance flowers. The subjective evaluations of concentrations may differ in detail for bumble bees and honeybees.

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