dc.contributor.author | Higham, Timothy | |
dc.contributor.author | Day, Steven | |
dc.contributor.author | Wainwright, Peter | |
dc.date.accessioned | 2009-03-17T16:19:17Z | |
dc.date.available | 2009-03-17T16:19:17Z | |
dc.date.issued | 2006-06-14 | |
dc.identifier.citation | The Journal of Experimental Biology 209, 3281-3287
Published by The Company of Biologists 2006 | |
dc.identifier.uri | http://hdl.handle.net/1850/8580 | |
dc.description | RIT community members may access full-text via RIT Libraries licensed databases: http://library.rit.edu/databases/ | |
dc.description.abstract | Suction feeding fish rapidly expand their oral cavity,
resulting in a flow of water directed towards the mouth
that is accompanied by a drop in pressure inside the
buccal cavity. Pressure inside the mouth and fluid speed
external to the mouth are understood to be mechanically
linked but the relationship between them has never been
empirically determined in any suction feeder. We present
the first simultaneous measurements of fluid speed and
buccal pressure during suction feeding in fishes. Digital
particle image velocimetry (DPIV) and high-speed video
were used to measure the maximum fluid speed in front of
the mouth of four largemouth bass and three bluegill
sunfish by positioning a vertical laser sheet on the midsagittal
plane of the fish. Peak magnitude of pressure
inside the buccal cavity was quantified using a transducer
positioned within a catheter that opened into the dorsal
wall of the buccal cavity. In both species the time of peak
pressure preceded the time of peak fluid speed by as much
as 42·ms, indicating a role for unsteady flow effects in
shaping this relation. We parameterized an existing model
of suction feeding to determine whether the relationship
between peak pressures and fluid speeds that we observed
could be predicted using just a few kinematic variables.
The model predicted much higher fluid speeds than we
measured at all values of peak pressure and gave a scaling
exponent between them (0.51) that was higher than
observed (0.36 for largemouth bass, 0.38 for bluegill). The
scaling between peak buccal pressure and peak fluid speed
at the mouth aperture differed in the two species,
supporting the recent conclusion that species morphology
affects this relation such that a general pattern may not
hold. | en_US |
dc.language.iso | en_US | en_US |
dc.publisher | The Company of Biologists | en_US |
dc.subject | Buccal pressure | en_US |
dc.subject | DPIV | en_US |
dc.subject | Fluid speed | en_US |
dc.subject | Hydrodynamics | en_US |
dc.subject | Lepomis | en_US |
dc.subject | Micropterus | en_US |
dc.subject | Prey capture | en_US |
dc.subject | Suction feeding | en_US |
dc.subject | Volume | en_US |
dc.title | The Pressures of suction feeding: The Relation between buccal pressure and induced fluid speed in centrarchid fishes | en_US |
dc.type | Article | en_US |
dc.identifier.url | http://dx.doi.org/10.1242/jeb.02383 | |