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Bumble bee learning and flower morphology
In general, morphologically complex flower designs took bees longer to learn than open-tubed or cup-shaped designs, however, specific predictions about the relative difficulty of learning to handle flowers could not be made from general flower morphology. Expand
Plant interactions for pollinator visits: a test of the magnet species effect
Though rarely documented, this type of facilitative interaction between plants that are highly attractive to pollinators (“magnet” species), and co-flowering species that are rarely visited by pollinators, may be widespread in plant communities. Expand
The effect of purple loosestrife (Lythrum salicaria L.; Lythraceae) on the pollination and reproductive success of sympatric co-flowering wetland plants
This study investigated the effect of purple loosestrife on the pollination and reproductive success of co-flowering plant species (Impatiens capensis Walt. Expand
The flower-visiting behaviour of bumble bees: floral complexity and learning.
The initial probing response of inexperienced bumble bees is mainly instinctive behaviou... the time spent in trial and error learning before the criterion was obtained was significantly greater for flowers of high structural complexity than for those of intermediate and low complexity. Expand
Behavioural assessment of visual acuity in bumblebees (Bombus impatiens).
The present study used previously developed techniques to measure resolution acuity in bumblebees (Bombus impatiens) and compared with those of the honeybee and discussed in the context of the bumblebee's foraging behaviour. Expand
Bumble Bee (Hymenoptera: Apidae) Activity and Pollination Levels in Commercial Tomato Greenhouses
Commercial greenhouse studies conducted to assess levels of pollination of tomato flowers in relation to bumble bee colony activity and colony densities found that an average activity of 2,000 bee trips per hectare per day was more than adequate to ensure sufficient pollination. Expand
Costs to foraging bumble bees of switching plant species
Bees foraging on simple flowers showed no tendency towards flower constancy, and switching between species did not increase handling times or handling errors, and foragers displayed strong constancy when visiting more complex flowers. Expand
Flower handling by bumblebees: a comparison of specialists and generalists
Naive workers of the specialist bumblebee, Bombus consobrinus, were more efficient than those of generalist species in acquiring flower-handling skills on their specialty plant, Aconitum (monkshood). Expand
Effect of Bumble Bee (Hymenoptera: Apidae) Pollination Intensity on the Quality of Greenhouse Tomatoes
It was found that pollination of tomato flowers greater than a bruising level of 2 (corresponding to approximately one to two bee visits) did not result in a significant increase in quality. Expand
The bumble bees of eastern Canada.
We provide keys for identifying the 26 bumble bee species ( Bombus and Psithyrus ) found in Canada east of Manitoba, and information on their ecology and distribution. The keys are designed for fieldExpand