Table 2.
Comparison of the fast-start response kinematics of three juvenile damselfishes that have been kept in seawater that has passed over live-healthy coral or dead-degraded coral (Habitat), and then either exposed to either clean seawater or conspecific alarm odours (Cues) within the burst arena just prior to being startled.
Species (df) | Variable | Habitat | Cue | Habitat*Cue | |||
---|---|---|---|---|---|---|---|
F | p | F | p | F | p | ||
P. amboinensis | Distance | 13.6 | <0.001 | 4.5 | 0.01 | 1.8 | 0.18 |
1, 75 | Speed | 14.8 | <0.001 | 6.4 | 0.01 | 2.2 | 0.14 |
Max speed | 16.7 | <0.001 | 3.2 | 0.08 | 6.5 | 0.01 | |
P. chrysurus | Distance | 0.2 | 0.66 | 12.8 | <0.001 | 0.04 | 0.85 |
1, 74 | Speed | 0.4 | 0.51 | 11.1 | 0.001 | 0.2 | 0.68 |
Max speed | 1.3 | 0.27 | 18.4 | <0.001 | 2.3 | 0.14 | |
P. wardi | Distance | 44.5 | <0.001 | 0.8 | 0.38 | 0.2 | 0.68 |
1, 77 | Speed | 27.5 | <0.001 | 0.02 | 0.89 | 0.01 | 0.92 |
Max speed | 30.3 | <0.001 | 0.004 | 0.95 | 0.4 | 0.55 |
Damselfish belong to the genus Pomacentrus. Results show the outcome of two-factor ANOVA’s on three kinematic variables: response distance (m), speed (m/s) and maximum speed (m/s). Bold values are significant at 0.05.