Behavioual Adaptations to Light Deprivation

Corthals, Kristina

Fast and Furious - Tōhoku Drift

dc.contributor.advisor	Geurten, Bart RH Dr.
dc.contributor.author	Corthals, Kristina
dc.date.accessioned	2019-03-20T09:43:08Z
dc.date.available	2019-03-20T09:43:08Z
dc.date.issued	2019-03-20
dc.identifier.uri	http://hdl.handle.net/11858/00-1735-0000-002E-E5D9-6
dc.identifier.uri	http://dx.doi.org/10.53846/goediss-7355
dc.language.iso	eng	de
dc.rights.uri	http://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subject.ddc	570	de
dc.title	Behavioual Adaptations to Light Deprivation	de
dc.title.alternative	Fast and Furious - Tōhoku Drift	de
dc.type	doctoralThesis	de
dc.contributor.referee	Göpfert, Martin Prof. Dr.
dc.date.examination	2018-12-18
dc.description.abstracteng	Similar to most non-sedentary animals, Drosophila shows a wide range of visually guided behaviours and their functionality is crucial for survival. Previous studies showed that visual impairment significantly reduced the courtship success of male Drosophila. However, the dark-fly strain which was raised under constant dark condition since 1957 survived in a vision-less environment for over 1500 generations. I analysed the behavioural adaptations of the dark-fly strain in both courtship and locomotion strategy to the decades of sensory depression. In dark-fly males several behavioural adaptations can be observed: they replace the typically competitive courtship strategy with a cooperative approach. Without visual information about the location of the female, male dark-flies produce a significantly increased courtship song volume. Additionally, the dark-fly strain shows evidence for a sex-specific co-evolution: compared to wildtype Drosophila, the dark-fly strain shows an increased hearing ability. However, dark-fly females show a reduced sensitivity of the auditory system in relation to dark-fly males. During locomotion, insects use optic flow, the retinal image shift induced by self-motion, to gain 3D-information. Translational movements result in faster movement of close objects across the retina than distant ones, whereas all objects move with the same speed during rotational movements. Therefore, only translational movements provide distance information. Insects overcome this problem by utilizing a saccadic movement strategy, consisting of very short and fast rotations separated from translational movements. Congruously, Drosophilae display a saccadic strategy during walking and flying. During walking, dark-raised flies abandon the separation of translation and rotation in favor of a newly emerged strategy: the Tōhoku Drift. This new strategy optimises the tactile field, rather then the visual input and allows dark-fly to cover more area when moving in a vision-less environment.	de
dc.contributor.coReferee	Fiala, André Prof. Dr.
dc.contributor.thirdReferee	Bucher, Gregor Prof. Dr.
dc.contributor.thirdReferee	Heinrich, Ralf Prof. Dr.
dc.contributor.thirdReferee	Clemens, Jan Dr.
dc.contributor.thirdReferee	Dosch, Roland PD Dr.
dc.subject.eng	Drosophila	de
dc.subject.eng	Courtship	de
dc.subject.eng	Vision	de
dc.subject.eng	Locomotion	de
dc.subject.eng	Saccadic Strategy	de
dc.subject.eng	Behaviour	de
dc.subject.eng	Behavioural Adaptations	de
dc.subject.eng	dark-fly	de
dc.subject.eng	dark-adapted Drosophila	de
dc.subject.eng	Exploration	de
dc.identifier.urn	urn:nbn:de:gbv:7-11858/00-1735-0000-002E-E5D9-6-5
dc.affiliation.institute	Biologische Fakultät für Biologie und Psychologie	de
dc.subject.gokfull	Biologie (PPN619462639)	de
dc.identifier.ppn	1666649325

Dateien

Name:thesis_KristinaCorthals.pdf

Größe:3.482Mb

Format:PDF

Beschreibung:Thesis "Behavioural ...

Öffnen

Name:: thesis_KristinaCorthals.pdf
Größe:: 3.482Mb
Format:: PDF
Beschreibung:: Thesis "Behavioural Adaptations ...

Öffnen

Das Dokument erscheint in:

Fakultät für Biologie und Psychologie (inkl. GAUSS) [1621]

Zur Kurzanzeige