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Visual detection th...
Visual detection threshold in the echolocating Daubenton’s bat (Myotis daubentonii)
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- Céchetto, Clément (författare)
- University of Southern Denmark
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- Jakobsen, Lasse (författare)
- University of Southern Denmark
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- Warrant, Eric J. (författare)
- Lund University,Lunds universitet,Funktionell zoologi,Biologiska institutionen,Naturvetenskapliga fakulteten,Syngruppen,Forskargrupper vid Lunds universitet,LU profilområde: Naturlig och artificiell kognition,Lunds universitets profilområden,Functional zoology,Department of Biology,Faculty of Science,Lund Vision Group,Lund University Research Groups,LU Profile Area: Natural and Artificial Cognition,Lund University Profile areas
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(creator_code:org_t)
- 2023-01-11
- 2023
- Engelska.
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Ingår i: Journal of Experimental Biology. - : The Company of Biologists. - 0022-0949 .- 1477-9145. ; 226:2
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http://dx.doi.org/10... (free)
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Abstract
Ämnesord
Stäng
- All bats possess eyes that are of adaptive value. Echolocating bats have retinae dominated by rod photoreceptors and use dim light vision for navigation, and in rare cases for hunting. However, the visual detection threshold of insectivorous echolocating bats remains unknown. Here, we determined this threshold for the vespertilionid bat Myotis daubentonii. We show that for a green luminous target, M. daubentonii has a visual luminance threshold of 3.2(±0.9)×10−4 cd m−2, an intensity corresponding to the luminance of an open cloudless terrestrial habitat on a starlit night. Our results show that echolocating bats have good visual sensitivity, allowing them to see during their active periods. Together with previous results showing that M. daubentonii has poor visual acuity (∼0.6 cycles deg−1), this suggests that echolocating bats do not use vision to hunt but rather to orient themselves.
Ämnesord
- NATURVETENSKAP -- Biologi -- Zoologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Zoology (hsv//eng)
- NATURVETENSKAP -- Biologi -- Etologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Behavioural Sciences Biology (hsv//eng)
Nyckelord
- Absolute sensitivity
- Bat vision
- Behaviour
- Nocturnal vision
- Psychophysics
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
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