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Fine colour discrimination requires differential conditioning in bumblebees
When provided with differential conditioning where both target and distractors were present, the bees learnt to discriminate stimuli separated by a perceptually small colour distance, showing that for bees to learn fine colour discrimination tasks it is important to use differential conditioning.
Biological significance of distinguishing between similar colours in spectrally variable illumination: bumblebees (Bombus terrestris) as a case study
It is found that it would be beneficial for plant species to have highly distinctive colour signals to overcome limitations on the bees performance in reliably judging differences between similar colours.
Comparative psychophysics of bumblebee and honeybee colour discrimination and object detection
A comparison of the experiments suggests a tradeoff between colour discrimination and colour detection in these two species, limited by the need to pool colour signals to overcome receptor noise.
Discrimination of flower colours in natural settings by the bumblebee species Bombus Terrestris (Hymenoptera: Apidae)
- A. Dyer
- Biology, Environmental Science
- 1 May 2006
The absolute conditioning function should serve as an important guide for the evaluation of pollinator discriminations between flowers in natural settings, and for the understanding of why there may have been considerable evolutionary pressure on plants to evolve distinctive flower colours so as to promote flower constancy in important pollinators.
Psychophysics: Bees trade off foraging speed for accuracy
Bees are the first example of an insect to show between-individual and within-individual speed– accuracy trade-offs, and each bee will sacrifice speed in favour of accuracy when errors are penalized.
Parallel evolution of angiosperm colour signals: common evolutionary pressures linked to hymenopteran vision
- A. Dyer, Skye Boyd-Gerny, S. McLoughlin, M. Rosa, V. Simonov, B. Wong
- Environmental ScienceProceedings of the Royal Society B: Biological…
- 7 September 2012
The degree of variability in flower coloration for particular angiosperm species matched the range of reflectance colours that can only be discriminated by bees that have experienced differential conditioning, suggesting a requirement for plasticity in the nervous systems of pollinators to allow generalization of flowers of the same species while overcoming the possible presence of non-rewarding flower mimics.
Bumblebees (Bombus terrestris) sacrifice foraging speed to solve difficult colour discrimination tasks
The results show both between task and within task speed-accuracy tradeoffs in bees, which suggests the possibility of a sophisticated and dynamic decision-making process.
Simultaneous and successive colour discrimination in the honeybee (Apis mellifera)
Discrimination of colours by bees with simultaneous viewing conditions exceeded previous estimates of what is possible considering models of photoreceptor noise measured in bees, which suggests spatial and/or temporal summation of colour signals for fine discrimination tasks.
An Integrative Framework for the Appraisal of Coloration in Nature
The key perceptual principles, namely, retinal photoreception, sensory channels, opponent processing, color constancy, and receptor noise, are discussed, to inform an analytical framework driven by the research question in relation to identifiable viewers and visual tasks of interest.