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SUMMARY:Physical ecology of swimming in plankton - Navish Wadhwa\, Technic
 al University of Denmark
DTSTART:20150304T130000Z
DTEND:20150304T140000Z
UID:TALK58283@talks.cam.ac.uk
CONTACT:Raymond E. Goldstein
DESCRIPTION:Small planktonic organisms live a difficult life in open water
 s\, having to continuously scan large amounts of water for food and mates\
 , and hide from predators at the same time. In the absence of vision at th
 ese small scales\, chemical and mechanical cues are highly important\, cre
 ating an evolutionary pressure to minimize any disturbances generated duri
 ng feeding and locomotion. In this talk\, I will present our examination o
 f these processes using a combination of experiments and theory. We have m
 easured flow disturbances created during swimming of a wide range of zoopl
 ankton\, and found that the decay of hydrodynamic disturbance relates to t
 he swimming mode. Breast stroke\, a common swimming mode in plankton\, res
 ults in "quiet" swimming\, in which flow velocity decays with distance cub
 ed. We used a simple three point force model to simulate this swimming gai
 t\, the results from which agree well with experiments. Finally\, I will s
 how some ongoing work in which we combine the model and experiments to ass
 ess the hydrodynamic traits of breast stroke swimming plankton.\n
LOCATION:MR11\,  Centre for Mathematical Sciences\, Wilberforce Road\, Cam
 bridge
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