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DTSTART:20170326T030000
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DTSTART:20171029T020000
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DTSTAMP:20260428T112238Z
UID:58e5d5db1c5f9537553521@ist.ac.at
DTSTART:20170421T103000
DTEND:20170421T113000
DESCRIPTION:Speaker: Dr. Pablo Oteiza\nhosted by Maximilian Jösch\nAbstrac
 t: When flying or swimming\, animals must adjust their own movement to com
 pensate for displacements induced by the flow of the surrounding air or wa
 ter. Although flow-induced displacements can be detected by the visual sys
 tem as changes within the animal’s frame of reference\, passive drift in 
 dark environments would occur in the absence of sensory information. In sp
 ite of this\, many aquatic animals will consistently orient and swim again
 st oncoming flows (a behavior known as rheotaxis) even in the absence of v
 isual cues. How animals achieve this task\, and its underlying sensory bas
 is\, is still unknown. In this talk\, I will show how larval zebrafish (Da
 nio rerio) perform rheotaxis by using flow velocity gradients as navigatio
 nal cues. I will present behavioral data that support a novel algorithm ba
 sed on such local velocity gradients\, that fish use to efficiently avoid 
 getting dragged by flowing water. Specifically\, I will show that fish use
  their mechanosensory lateral line to first sense the curl (or vorticity) 
 of the local velocity vector field to detect the presence of flow and\, se
 cond\, measure its temporal change following swim bouts to deduce flow dir
 ection. The implications of this rheotactic algorithm for systems neurosci
 ence\, behavioral ecology and robotic design will also be discussed.\n
LOCATION:Mondi Seminar Room 1\, Central Building\, ISTA
ORGANIZER:rsix@ist.ac.at
SUMMARY:Dr. Pablo Oteiza: Rheotaxis in Larval Zebrafish
URL:https://talks-calendar.ista.ac.at/events/416
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