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Figure 6


Fig. 6. Relationship of propulsive efficiency ({eta}p) and swimming speed (U/BL). The black line represents the calculated efficiency for an average manatee using Lighthill's bulk momentum model (see text). Color lines show Pt for beluga Delphinapterus leucas, killer whale Orcinus orca, false killer whale Pseudorca crassidens and bottlenose dolphin Tursiops truncatus (from Fish, 1998b).