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Using micro-CT techniques to explore the role of sex and hair in the functional morphology of bumblebee (Bombus terrestris) ocelli

Wilby, David LU ; Aarts, Tobio LU ; Tichit, Pierre LU ; Bodey, Andrew; Rau, Christoph; Taylor, Gavin LU and Baird, Emily LU (2019) In Vision Research 158. p.100-108
Abstract

Many insects have triplets of camera type eyes, called ocelli, whose function remains unclear for most species. Here, we investigate the ocelli of the bumblebee, Bombus terrestris, using reconstructed 3D data from X-ray microtomography scans combined with computational ray-tracing simulations. This method enables us, not only to predict the visual fields of the ocelli, but to explore for the first time the effect that hair has on them as well as the difference between worker female and male ocelli. We find that bumblebee ocellar fields of view are directed forward and dorsally, incorporating the horizon as well as the sky. There is substantial binocular overlap between the median and lateral ocelli, but no overlap between the two... (More)

Many insects have triplets of camera type eyes, called ocelli, whose function remains unclear for most species. Here, we investigate the ocelli of the bumblebee, Bombus terrestris, using reconstructed 3D data from X-ray microtomography scans combined with computational ray-tracing simulations. This method enables us, not only to predict the visual fields of the ocelli, but to explore for the first time the effect that hair has on them as well as the difference between worker female and male ocelli. We find that bumblebee ocellar fields of view are directed forward and dorsally, incorporating the horizon as well as the sky. There is substantial binocular overlap between the median and lateral ocelli, but no overlap between the two lateral ocelli. Hairs in both workers and males occlude the ocellar field of view, mostly laterally in the worker median ocellus and dorsally in the lateral ocelli. There is little to no sexual dimorphism in the ocellar visual field, suggesting that in B. terrestris they confer no advantage to mating strategies. We compare our results with published observations for the visual fields of compound eyes in the same species as well as with the ocellar vision of other bee and insect species.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Bombus terrestris, Bumblebee, Eyes, Insect, Ocelli, Ray-tracing, Vision, X-ray microtomography
in
Vision Research
volume
158
pages
9 pages
publisher
Elsevier
external identifiers
  • scopus:85062345640
ISSN
0042-6989
DOI
10.1016/j.visres.2019.02.008
language
English
LU publication?
yes
id
245c9f3c-714d-40b6-a1c3-568dced78a53
date added to LUP
2019-03-12 12:08:29
date last changed
2019-05-15 15:51:07
@article{245c9f3c-714d-40b6-a1c3-568dced78a53,
  abstract     = {<p>Many insects have triplets of camera type eyes, called ocelli, whose function remains unclear for most species. Here, we investigate the ocelli of the bumblebee, Bombus terrestris, using reconstructed 3D data from X-ray microtomography scans combined with computational ray-tracing simulations. This method enables us, not only to predict the visual fields of the ocelli, but to explore for the first time the effect that hair has on them as well as the difference between worker female and male ocelli. We find that bumblebee ocellar fields of view are directed forward and dorsally, incorporating the horizon as well as the sky. There is substantial binocular overlap between the median and lateral ocelli, but no overlap between the two lateral ocelli. Hairs in both workers and males occlude the ocellar field of view, mostly laterally in the worker median ocellus and dorsally in the lateral ocelli. There is little to no sexual dimorphism in the ocellar visual field, suggesting that in B. terrestris they confer no advantage to mating strategies. We compare our results with published observations for the visual fields of compound eyes in the same species as well as with the ocellar vision of other bee and insect species.</p>},
  author       = {Wilby, David and Aarts, Tobio and Tichit, Pierre and Bodey, Andrew and Rau, Christoph and Taylor, Gavin and Baird, Emily},
  issn         = {0042-6989},
  keyword      = {Bombus terrestris,Bumblebee,Eyes,Insect,Ocelli,Ray-tracing,Vision,X-ray microtomography},
  language     = {eng},
  pages        = {100--108},
  publisher    = {Elsevier},
  series       = {Vision Research},
  title        = {Using micro-CT techniques to explore the role of sex and hair in the functional morphology of bumblebee (Bombus terrestris) ocelli},
  url          = {http://dx.doi.org/10.1016/j.visres.2019.02.008},
  volume       = {158},
  year         = {2019},
}