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National Repository of Grey Literature
156
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Ultrastruktura duhovkového a retinálního pigmentového epitelu
Synek, Svatopluk
;
Páč, Libor
;
Masarykova univerzita.
Detailed record
Fotopická elektroretinografie u diabetu
Svěrák, Jaromír
;
Fakultní nemocnice (Hradec Králové, Česko)
Detailed record
Function of retina of Homing pigeon \kur{Columba livia} in magnetoreception
BAJGAR, Adam
Many animals have ability to percieve the magnetic field of the Earth and use this clue for both orientation and navigation. Yet little is known about physiological mechanism that underlies this sensory ability. Although physiological mechanism still remains unclear, there are three major hypotheses how animals can detect the magnetic field. In this study I focused on the radical pair theory. I analyzed how manipulation of the ambient magnetic field influence the expression of CRY 1, CRY 2 and c-Fos in the pigeon´s retina. I observed in incerased numbers of CRY1, c-Fos and CRY1+c-Fos possitive cells in the ihned nuclear layer (INL) of the retina in animals sbjected to the periodical manipulation of the magnetic field inclination. These data demonstrate that the INL constains a population of neurons that are responsive to magnetic stimuli and strongly suggest that Cry 1 is involved in detection of the Earth magnetic field.
Detailed record
Light perception in two mole-rat species, the silvery mole-rat \kur{(Heliophobius argenteocinereus)} and the giant mole-rat \kur{(Fukomys mechowii)}.
KOTT, Ondřej
Sight in subterranean mammals living in a dark ecotope has generally been assumed as not needed and therefore greatly diminished in its function. Recent neuroanatomical studies demonstrate unexpected preservation of the visual system of several African mole-rats (Bathyergidae, Rodentia). Only a few behavioural studies, testing visual abilities and discussing their adaptive significance in these rodents, have been published to date. A spontaneous preference to light stimuli of two mole-rat species, the silvery mole-rat (Heliophobius argenteocinereus) and the giant mole-rat (Fukomys mechowii), was tested in this study. Assessed results showed convincingly that both species are able to perceive light. The following experiments provided the first behavioural support to the perception of short-wavelengths in this intensively studied group of subterranean rodents.
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National Repository of Grey Literature :
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