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Communication at the NABS Annual meeting, Keystone, 2000
(375) MUSSEL ORIENTATION BEHAVIOR.
P.A. Krallman. Department of Biology, St. Olaf College, Northfield, MN 55057
I studied the orientation of Anodontoides ferussacianus in the field and the laboratory. I created a standard curve for current velocity as a function of motor speed for the flow tank that was used in the laboratory study. Mussels were placed in the tank in one of four positions: 90 degrees to the flow with the posterior end straight up, 90 degrees to the flow with the ventral side down, 90 degrees to the flow lying on one side, and 90 degrees to the flow with the ventral side up. Approximately 57% of mussels reoriented into the flow from all positions. The average time the mussels took to reorient was 56 minutes (SD=20). In the field, 41% of mussels were oriented within 30 degrees of the flow regardless of their relationship to apparent upstream/downstream currents. The percentage of mussels observed for each angle decreased as the angle from the flow increased.
Presented at 1:00 PM on Wednesday, May 31, 2000 in Life History Characteristics
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