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Fig. 8. The relationship between fluid speed AFS and distance from the mouth aperture (scaled to maximum mouth diameter) and the predicted effects of ram speed RS (RS/AFSaperture=20% in this case) on this relationship. The blue line represents AFS for a stationary fish and the red line AFS for a fish with a RS of 20 cm s–1. Note that RS has a much greater effect on AFSaperture than AFS1/2 PG. The length of the green arrow represents the magnitude of body closing speed of a stationary fish (25 cm s–1) and the length of the black arrow represents the magnitude of body closing speed of a fish with a RS of 20 cm s–1 (40 cm s–1). Note that overall body closing speed is increased with moderate levels of RS. The relationship between fluid speed and distance from the mouth is from Day et al. (2005).





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