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Figure 2


Fig. 2. (A) Electromyographic sequence (amplified 5000x) of a bluegill sunfish (Lepomis macrochirus) swimming while the speed of the flow tank was gradually increased from swim speeds of 0 to 2.0 L s–1. Muscle activity is shown for the supracarinalis (SC), hypochordal longitudinalis (HL), flexor dorsalis (FD), interradialis (IR) designated by the number of its dorsally corresponding fin ray, and flexor ventralis (FV) on the left side, and the infracarinalis (IC) and red myomere (RED) on the right side of the fish. (B,C) Enlarged subset of sequences of fish swimming at 1.0 (B) and 2.0 (C) L s–1. The scale for sequences B and C is in the lower right corner below C. EMG color corresponds to the anatomical diagram in Fig. 1.





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