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Table 2.

Variables affecting the putative escape success of juvenile cod

All fish
Fish that responded
G2PG2P
Locomotor performance     
    D80 0.12 0.725 0.001 0.978 
    S1 angle 0.24 0.621 0.66 0.415 
    S1 duration 0.01 0.929 0.28 0.599 
    Turning rate 0.49 0.484 1.70 0.193 
Escape direction     
    Escape trajectorya 0.80 0.372 0.28 0.595 
    Initial orientationa 0.44 0.505 0.21 0.643 
Escape timing     
    ALT 14.8+ <0.001 14.8+ <0.001 
    Reactive distance 9.9 0.002 8.77 0.003 
Responsiveness 39.7 <0.001 — — 
All fish
Fish that responded
G2PG2P
Locomotor performance     
    D80 0.12 0.725 0.001 0.978 
    S1 angle 0.24 0.621 0.66 0.415 
    S1 duration 0.01 0.929 0.28 0.599 
    Turning rate 0.49 0.484 1.70 0.193 
Escape direction     
    Escape trajectorya 0.80 0.372 0.28 0.595 
    Initial orientationa 0.44 0.505 0.21 0.643 
Escape timing     
    ALT 14.8+ <0.001 14.8+ <0.001 
    Reactive distance 9.9 0.002 8.77 0.003 
Responsiveness 39.7 <0.001 — — 

G2, logistic regression analysis.

a

Angular displacement from predator; +inclusion of the component makes a significant contribution to the multiple logistic regression model(P<0.05: forward stepwise); D80, distance covered in 80 ms; S1, stage 1 of escape response; ALT, apparent looming threshold.

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