Table 1 Summary results of prawn camouflage against seaweed backgrounds based on seahorse vision.

From: The adaptive value of camouflage and colour change in a polymorphic prawn

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

  1. 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.
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