Swimming kinematics and hydrodynamic imaging in the blind Mexican cave fish (Astyanax fasciatus).

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dc.contributor.author Windsor, SP en
dc.contributor.author Tan, DS en
dc.contributor.author Montgomery, JC en
dc.date.accessioned 2012-03-08T01:54:16Z en
dc.date.issued 2008 en
dc.identifier.citation J EXP BIOL 211(18):2950-2959 15 Sep 2008 en
dc.identifier.issn 0022-0949 en
dc.identifier.uri http://hdl.handle.net/2292/13409 en
dc.description.abstract Blind Mexican cave fish (Astyanax fasciatus) lack a functioning visual system, and are known to use self-generated water motion to sense their surroundings; an ability termed hydrodynamic imaging. Nearby objects distort the flow field created by the motion of the fish. These flow distortions are sensed by the mechanosensory lateral line. Here we used image processing to measure detailed kinematics, along with a new behavioural technique, to investigate the effectiveness of hydrodynamic imaging. In a headon approach to a wall, fish reacted to avoid collision with the wall at an average distance of only 4.0±0.2 mm. Contrary to previous expectation, there was no significant correlation between the swimming velocity of the fish and the distance at which they reacted to the wall. Hydrodynamic imaging appeared to be most effective when the fish were gliding with their bodies held straight, with the proportion of approaches to the wall that resulted in collision increasing from 11% to 73% if the fish were beating their tails rather than gliding as they neared the wall. The swimming kinematics of the fish were significantly different when swimming beside a wall compared with when swimming away from any walls. Blind cave fish frequently touched walls when swimming alongside them, indicating that they use both tactile and hydrodynamic information in this situation. We conclude that although hydrodynamic imaging can provide effective collision avoidance, it is a short-range sense that may often be used synergistically with direct touch. en
dc.publisher The Company of Biologists Ltd. en
dc.relation.ispartofseries Journal of Experimental Biology en
dc.rights Items in ResearchSpace are protected by copyright, with all rights reserved, unless otherwise indicated. Previously published items are made available in accordance with the copyright policy of the publisher. Details obtained from http://www.sherpa.ac.uk/romeo/issn/0022-0949/ en
dc.rights.uri https://researchspace.auckland.ac.nz/docs/uoa-docs/rights.htm en
dc.title Swimming kinematics and hydrodynamic imaging in the blind Mexican cave fish (Astyanax fasciatus). en
dc.type Journal Article en
dc.identifier.doi 10.1242/jeb.020453 en
pubs.begin-page 2950 en
pubs.volume 211 en
dc.rights.holder Copyright: The Company of Biologists Ltd. en
dc.identifier.pmid 18775932 en
pubs.end-page 2959 en
dc.rights.accessrights http://purl.org/eprint/accessRights/RestrictedAccess en
pubs.subtype Article en
pubs.elements-id 80336 en
pubs.org-id Science en
pubs.org-id Marine Science en
pubs.record-created-at-source-date 2010-09-01 en
pubs.dimensions-id 18775932 en


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