Table 1.
Summary results of prawn camouflage against seaweed backgrounds based on seahorse vision.
| Source of variation | df | Colour JNDs | Luminance JNDs | ||||
|---|---|---|---|---|---|---|---|
| MS | F | p | MS | F | p | ||
| Prawn morph – M | 1 | 35.7 | 21.50 | <0.001 | 92.0 | 4.42 | 0.040 |
| Seaweed habitat – S | 1 | 86.6 | 52.08 | <0.001 | 20.4 | 0.98 | 0.327 |
| M × S | 1 | 150.4 | 90.43 | <0.001 | 86.4 | 4.15 | 0.046 |
| Error | 56 | 1.7 | 20.8 | ||||
| Cochran’s C = 0.541; p < 0.01 | Cochran’s C = 0.356; p > 0.05 | ||||||
Results of two-way analyses of variance testing differences in “just-noticeable differences” (JNDs) for colour and luminance measurements, according to combinations of Hippolyte obliquimanus colour morphs (‘brown’, ‘pink’) and seaweed backgrounds (Galaxaura marginata, Sargassum furcatum). Cochran’s C: Cochran statistic testing variance heterogeneity.