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Figure 8


Fig. 8. Relation among kinematic stages 1 and 2 of archer fish fast-starts. Red circles relate to predictive starts, blue circles relate to escape C-starts elicited in the same group of fish. (A) Duration of stage 2 versus duration of stage 1. Slope and intercept of regression lines (predictive starts, red: r2=0.319, P<0.0001, N=76; escapes, blue: r2=0.120, P<0.05, N=34) were not different between escapes and predictive starts (P>0.05). (B) Relation of straightening rate in stage 2 (maximum of dCL/dt; CL=dimensionless chord length) to rate of bending in stage 1 (maximum of -dCL/dt). Derivatives are taken from a linear regression analysis around the point of maximum changes, using at least 5 neighboring points. Slope and intercept of regression lines (predictive starts, red: r2=0.288, P<0.0001, N=76; escapes, blue: r2=0.418, P<0.0001, N=34) were not different between escapes and predictive starts (P>0.05).





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