The effect of step size on straight-line orientation
(2019) In Journal of the Royal Society, Interface 16(157).- Abstract
Moving along a straight path is a surprisingly difficult task. This is because, with each ensuing step, noise is generated in the motor and sensory systems, causing the animal to deviate from its intended route. When relying solely on internal sensory information to correct for this noise, the directional error generated with each stride accumulates, ultimately leading to a curved path. In contrast, external compass cues effectively allow the animal to correct for errors in its bearing. Here, we studied straight-line orientation in two different sized dung beetles. This allowed us to characterize and model the size of the directional error generated with each step, in the absence of external visual compass cues (motor error) as well as... (More)
Moving along a straight path is a surprisingly difficult task. This is because, with each ensuing step, noise is generated in the motor and sensory systems, causing the animal to deviate from its intended route. When relying solely on internal sensory information to correct for this noise, the directional error generated with each stride accumulates, ultimately leading to a curved path. In contrast, external compass cues effectively allow the animal to correct for errors in its bearing. Here, we studied straight-line orientation in two different sized dung beetles. This allowed us to characterize and model the size of the directional error generated with each step, in the absence of external visual compass cues (motor error) as well as in the presence of these cues (compass and motor errors). In addition, we model how dung beetles balance the influence of internal and external orientation cues as they orient along straight paths under the open sky. We conclude that the directional error that unavoidably accumulates as the beetle travels is inversely proportional to the step size of the insect, and that both beetle species weigh the two sources of directional information in a similar fashion.
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- author
- Khaldy, Lana LU ; Peleg, Orit ; Tocco, Claudia LU ; Mahadevan, L. ; Byrne, Marcus and Dacke, Marie LU
- organization
- publishing date
- 2019
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- compass, dung beetle, navigation, orientation, random walk, step size
- in
- Journal of the Royal Society, Interface
- volume
- 16
- issue
- 157
- article number
- 20190181
- publisher
- The Royal Society of Canada
- external identifiers
-
- scopus:85071152518
- pmid:31387484
- ISSN
- 1742-5662
- DOI
- 10.1098/rsif.2019.0181
- language
- English
- LU publication?
- yes
- id
- 99b61234-61e4-4718-aad7-0541fa0271c2
- date added to LUP
- 2019-09-09 15:05:20
- date last changed
- 2024-04-16 19:06:58
@article{99b61234-61e4-4718-aad7-0541fa0271c2,
abstract = {{<p>Moving along a straight path is a surprisingly difficult task. This is because, with each ensuing step, noise is generated in the motor and sensory systems, causing the animal to deviate from its intended route. When relying solely on internal sensory information to correct for this noise, the directional error generated with each stride accumulates, ultimately leading to a curved path. In contrast, external compass cues effectively allow the animal to correct for errors in its bearing. Here, we studied straight-line orientation in two different sized dung beetles. This allowed us to characterize and model the size of the directional error generated with each step, in the absence of external visual compass cues (motor error) as well as in the presence of these cues (compass and motor errors). In addition, we model how dung beetles balance the influence of internal and external orientation cues as they orient along straight paths under the open sky. We conclude that the directional error that unavoidably accumulates as the beetle travels is inversely proportional to the step size of the insect, and that both beetle species weigh the two sources of directional information in a similar fashion.</p>}},
author = {{Khaldy, Lana and Peleg, Orit and Tocco, Claudia and Mahadevan, L. and Byrne, Marcus and Dacke, Marie}},
issn = {{1742-5662}},
keywords = {{compass; dung beetle; navigation; orientation; random walk; step size}},
language = {{eng}},
number = {{157}},
publisher = {{The Royal Society of Canada}},
series = {{Journal of the Royal Society, Interface}},
title = {{The effect of step size on straight-line orientation}},
url = {{http://dx.doi.org/10.1098/rsif.2019.0181}},
doi = {{10.1098/rsif.2019.0181}},
volume = {{16}},
year = {{2019}},
}