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Fig. 4. The duration of each stage in the paddling cycle of the great cormorant (A) and the proportion of the power (burst) and deceleration (glide + recovery) stages in the paddling cycle (B) in relation to paddling frequency. Note that the glide duration decreased with the increase in paddling frequency. At a paddling frequency of 2.7 Hz, the duration of the glide phase was diminished to almost zero so that the power and recovery stages each occupy ~50% of the paddling cycle duration.





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