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Original title:
Zrakové schopnosti podzemních hlodavců
Translated title: Visual capabilities in subterranean rodents
Authors: KOTT, Ondřej
Document type: Doctoral theses
Year: 2015
Language: cze
Abstract: This Ph.D. thesis focuses on the visual capabilities of subterranean African mole-rats (family Bathyegidae) and a potential role of their residual vision. We described basic visual capability of light/dark discrimination and capacity to perceive short to medium-wavelength light in the photopic range of intensities. Our behavioural findings revealed severe visual deficits, implying visually guided spatial orientation in molerats improbable. Our field study demostrated no light-correlated daily activitivy pattern of mole-rats in the natural habitat. We described very effective propagation of long wavelength light in breached burrows that can be detected by mole-rats for long distances, in contary to short wavelengths with very low propagation. Thus, an unique primary blue light perception, described only in African mole-rats among all mammalian species so far, has most probably no adaptive value and might be only a result of arrested cone development. Mole-rats effectively localized and plugged with soil illuminated sites under laboratory conditions, supporting the hypothesis that low acuity residual vision play an indispensable role in bathyergid anti-predatory behaviour and tunnel maintanance but not in spatial orientation.
Citation: KOTT, Ondřej. Zrakové schopnosti podzemních hlodavců. České Budějovice, 2015. disertační práce (Ph.D.). JIHOČESKÁ UNIVERZITA V ČESKÝCH BUDĚJOVICÍCH. Přírodovědecká fakulta
Institution: University of South Bohemia in České Budějovice (web)
Document availability information: Fulltext is available in the Digital Repository of University of South Bohemia.
Original record: http://www.jcu.cz/vskp/13963
Permalink: http://www.nusl.cz/ntk/nusl-200685
The record appears in these collections:
Universities and colleges > Public universities > University of South Bohemia in České Budějovice
Academic theses (ETDs) > Doctoral theses
Translated title: Visual capabilities in subterranean rodents
Authors: KOTT, Ondřej
Document type: Doctoral theses
Year: 2015
Language: cze
Abstract: This Ph.D. thesis focuses on the visual capabilities of subterranean African mole-rats (family Bathyegidae) and a potential role of their residual vision. We described basic visual capability of light/dark discrimination and capacity to perceive short to medium-wavelength light in the photopic range of intensities. Our behavioural findings revealed severe visual deficits, implying visually guided spatial orientation in molerats improbable. Our field study demostrated no light-correlated daily activitivy pattern of mole-rats in the natural habitat. We described very effective propagation of long wavelength light in breached burrows that can be detected by mole-rats for long distances, in contary to short wavelengths with very low propagation. Thus, an unique primary blue light perception, described only in African mole-rats among all mammalian species so far, has most probably no adaptive value and might be only a result of arrested cone development. Mole-rats effectively localized and plugged with soil illuminated sites under laboratory conditions, supporting the hypothesis that low acuity residual vision play an indispensable role in bathyergid anti-predatory behaviour and tunnel maintanance but not in spatial orientation.
Citation: KOTT, Ondřej. Zrakové schopnosti podzemních hlodavců. České Budějovice, 2015. disertační práce (Ph.D.). JIHOČESKÁ UNIVERZITA V ČESKÝCH BUDĚJOVICÍCH. Přírodovědecká fakulta
Institution: University of South Bohemia in České Budějovice (web)
Document availability information: Fulltext is available in the Digital Repository of University of South Bohemia.
Original record: http://www.jcu.cz/vskp/13963
Permalink: http://www.nusl.cz/ntk/nusl-200685
The record appears in these collections:
Universities and colleges > Public universities > University of South Bohemia in České Budějovice
Academic theses (ETDs) > Doctoral theses
Record created 2015-10-05, last modified 2023-01-15