Risk-sensitive foraging: Choice behaviour of honeybees in response to variability in volume of reward

Sharoni Shafir, Daniel D. Wiegmann, Brian Smith, Leslie A. Real

Research output: Contribution to journalArticle

61 Citations (Scopus)

Abstract

We tested risk sensitivity towards variability in volume of reward with harnessed honeybees, Apis mellifera, in a proboscis-extension conditioning paradigm. We conditioned each subject to turn its head and extend its proboscis towards one of two presented odours; one odour was associated with a constant reward volume and the other with a variable reward volume that was either low or high, with probabilities P=0.75 and (1 - P)=0.25, respectively. The volumes of rewards were varied among three experimental conditions. In conditions I and II, the variable reward option included a low reward of zero (i.e. reinforcement was withheld in the low reward value); in condition I, the mean of the variable and of the constant reward options were the same, and in condition II, the variable reward option had a higher mean reward than the constant reward option. The behaviour of subjects did not differ between treatments and the majority of individuals were risk averse. In condition III, the variable reward option did not include a zero reward and the mean reward did not differ between options. Very few of the individuals assigned to condition III developed a preference for either reward option. Thus, honeybees are risk sensitive to variability in volume of reward in some conditions and the degree of risk sensitivity depends on characteristics of the reward distributions. The most salient characteristic may be a relative measure of variability, such as the value of the coefficient of variation, of reward. The experimental paradigm that we developed is a powerful tool for studying the mechanism of risk sensitivity in bees, as well as other aspects of learning, decision making, perception and memory.

Original languageEnglish (US)
Pages (from-to)1055-1061
Number of pages7
JournalAnimal Behaviour
Volume57
Issue number5
DOIs
StatePublished - May 1999
Externally publishedYes

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honeybee
honey bees
foraging
proboscis
odor
odors
conditioned behavior
Apis mellifera
bee
conditioning
reinforcement
decision making
Apoidea
learning

ASJC Scopus subject areas

  • Animal Science and Zoology
  • Ecology, Evolution, Behavior and Systematics

Cite this

Risk-sensitive foraging : Choice behaviour of honeybees in response to variability in volume of reward. / Shafir, Sharoni; Wiegmann, Daniel D.; Smith, Brian; Real, Leslie A.

In: Animal Behaviour, Vol. 57, No. 5, 05.1999, p. 1055-1061.

Research output: Contribution to journalArticle

Shafir, Sharoni ; Wiegmann, Daniel D. ; Smith, Brian ; Real, Leslie A. / Risk-sensitive foraging : Choice behaviour of honeybees in response to variability in volume of reward. In: Animal Behaviour. 1999 ; Vol. 57, No. 5. pp. 1055-1061.
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