Název:
Zrakové schopnosti podzemních hlodavců
Překlad názvu:
Visual capabilities in subterranean rodents
Autoři:
KOTT, Ondřej Typ dokumentu: Disertační práce
Rok:
2015
Jazyk:
cze
Abstrakt: 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. Citace: KOTT, Ondřej. Zrakové schopnosti podzemních hlodavců. České Budějovice, 2015. disertační práce (Ph.D.). JIHOČESKÁ UNIVERZITA V ČESKÝCH BUDĚJOVICÍCH. Přírodovědecká fakulta
Instituce: Jihočeská univerzita v Českých Budějovicích
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Plný text je dostupný v digitálním repozitáři JČU. Původní záznam: http://www.jcu.cz/vskp/13963