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The Costs of Foraging in Three Dimensions for Bumble Bees

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Advisor
Harder, Lawrence D.
Author
Robinson, David Ford Sidney
Accessioned
2013-12-23T19:05:54Z
Available
2014-03-15T07:00:17Z
Issued
2013-12-23
Submitted
2013
Other
foraging
bees
pollination ecology
behavioural ecology
behavioral ecology
behavior
behaviour
Subject
Ecology
Entomology
Type
Thesis
Metadata
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Abstract
Foraging decisions that optimize returns should be favoured by natural selection. Nectarivorous animals face problems associated with foraging in three-dimensional space, including difficulty remembering foraging paths and expending energy to work against gravity. Captive individual bumble bees (Bombus impatiens) were video-taped visiting artificial inflorescences to test the effects of three-dimensional (3D) movements and gravity on their behaviour. Bumble bees responded to increased dimensionality by probing fewer flowers for longer durations and responding to self-imposed variation, as a consequence of depleting flowers, by visiting fewer flowers per floral inspection on three-dimensional inflorescences than on two-dimensional inflorescences. When confronted with inflorescences inclined at angles from 0-degrees to 90-degrees, bees demonstrated that flying upward is less time-consuming than flying downward or horizontally, suggesting that their flight capacity is optimized for upward movement. The results provide new insights on the role of cognition and upward movements in bumble-bee foraging.
Corporate
University of Calgary
Faculty
Graduate Studies
Doi
http://dx.doi.org/10.5072/PRISM/28039
Uri
http://hdl.handle.net/11023/1226
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