Aquatic Sciences Meeting, Albuquerque 2001

SS07 Biomechanics: Turbulent Mass Transfer (Environmental Connections)

Date: Monday, February 12, 2001, Time: 2:45:00 PM

Location: San Miguel

Stocks, K, I, San Diego Supercomputer Center/Scripps, San Diego, USA, kstocks@sdsc.edu

FLUME EXPERIMENTS ON POST-SETTLEMENT MOVEMENT IN POLYCHAETES

Flume experiments were used to examine the rate and nature (bedload versus suspended-load transport) of post-settlement movement in five species of juvenile and adult polychaetes. Significant differences were found among species, with between 0 and 24 % moving over 6 hours in an 11 cm per s flow velocity. These species-related patterns were incompatible with the hypothesis that post-settlement movement is a passive hydrodynamic process, and were not related to the reproductive mode of the species, but did relate to the species' feeding mode and depth preference. Further flume experiments with adult Streblospio benedicti indicated that dark versus light conditions had no effect on the rate of movement, but that movement rates were significantly decreased when food was available, and in individuals that had either been held in still-water cultures as adults for ~ 2 months or grown from larvae to adults in culture.

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Aquatic Sciences Meeting, Albuquerque 2001

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