HR: 16:00h
AN: OS54A-01    [Abstracts]
TI: From Monotonous Hop-and-Sink Swimming to Constant Gliding via Chaotic Motions in 3D: Is There Adaptive Behavior in Planktonic Micro-Crustaceans?
AU: * Strickler, J R
EM: jrs@uwm.edu
AB: Planktonic micro-crustaceans, such as Daphnia, Copepod, and Cyclops, swim in the 3D environment of water and feed on suspended material, mostly algae and bacteria. Their mechanisms for swimming differ; some use their swimming legs to produce one hop per second resulting in a speed of one body-length per second, while others scan water volumes with their mouthparts and glide through the water column at 1 to 10 body-lengths per second. However, our observations show that these speeds are modulated. The question to be discussed will be whether or not these modulations show adaptive behavior taking food quality and food abundance as criteria for the swimming performances. Additionally, we investigated the degree these temporal motion patterns are dependant on the sizes, and therefore, on the Reynolds number of the animals.
UR: http://pantherfile.uwm.edu/jrs/public
DE: 1635 Oceans (1616, 3305, 4215, 4513)
DE: 4273 Physical and biogeochemical interactions
DE: 4817 Food webs, structure, and dynamics (0491)
DE: 4890 Zooplankton
SC: Ocean Sciences [OS]
MN: 2007 Fall Meeting