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Table 2 Results of three-way orthogonal ANOVA on the effects of space (refuge), time (assay), and nocturnal observation period (sampling period) on migratory speed of tagged individuals of D. antillarum

From: Patterns of nocturnal movement of the long-spined sea urchin Diadema antillarum (Philippi) in Gran Canaria (the Canary Islands, central East Atlantic Ocean)

Source of variation

df

SS

MS

F

A (refuge)

2

6.22

3.11

3.073

B (assay)

2

1.339

0.67

0.662

C (sampling time)

3

6.79

No test

A×B

4

4.048

1.012

2.691**

A×C

6

3.232

0.539

0.51

B×C

6

2.116

0.353

0.334

A×B×C

12

12.659

1.055

2.808**

Error

324

121.074

0.376

  1. **P<0.01