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Figure 10


Fig. 10. (A) The shear stresses surrounding a rotating abalone egg. Model output is displayed as a pressure map, with x and y axes oriented parallel or perpendicular to the direction of flow, respectively. Relative to flow, two 45° transects (broken lines) were established upstream and downstream of the modeled egg surface. G (s–1) is fluid shear generated in the Taylor-Couette flow tank. (B) The relationship between Fswim/Fshear and distance from the modeled egg surface along a downstream (Left) or upstream (Right) transect. Sperm were modeled as prolate spheroids. (C) Distance from the modeled egg surface along a upstream transect where Fswim/Fshear=1, as a function of G. Local shears vary substantially near an egg surface and are incorporated into our models. Three specific conditions were evaluated: an abalone (Ab) egg (with or without rotation) and a brine shrimp (BS) egg (with rotation).





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