Small and large bumblebees invest differently when learning about flowers (article)
Frasnelli, E; Robert, T; Chow, PKY; et al.Scales, B; Gibson, S; Manning, N; Philippides, AO; Collett, TS; Hempel De Ibarra, N
Date: 28 December 2020
Article
Journal
Current Biology
Publisher
Elsevier (Cell Press)
Publisher DOI
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Abstract
Honeybees [1] and bumblebees [2] perform learning flights on leaving a newly discovered
flower. During these flights, bees spend a portion of the time turning back to face the flower
when they can memorise views of the flower and its surroundings. In honeybees, learning
flights become longer, when the reward offered by a flower ...
Honeybees [1] and bumblebees [2] perform learning flights on leaving a newly discovered
flower. During these flights, bees spend a portion of the time turning back to face the flower
when they can memorise views of the flower and its surroundings. In honeybees, learning
flights become longer, when the reward offered by a flower is increased [3]. We show here
that bumblebees behave in a similar way and we add that bumblebees face an artificial flower
more when the concentration of the sucrose solution that the flower provides is higher. The
surprising finding is that a bee’s size determines what a bumblebee regards as a 'low' or a
'high' concentration and so affects its learning behaviour. The larger bees in a sample of
foragers only enhance their flower facing when the sucrose concentration is in the upper
range of the flowers that are naturally available to bees [4]. In contrast, smaller bees invest
the same effort in facing flowers, whether the concentration is high or low, but their effort is
less than that of larger bees. The way in which different sized bees distribute their effort
when learning about flowers parallels the foraging behaviour of a colony. Large bumblebees
[5, 6] are able to carry larger loads and explore further from the nest than smaller ones [7].
Small ones with a smaller flight range and carrying capacity cannot afford to be as selective
and so accept a wider range of flowers.
Psychology - old structure
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