Table 2 Comparisons of the vertical distribution of the different developmental stages of Ophiocomina nigra, Ophiothrix fragilis and Amphiura filiformis in the bay of Douarnenez.

From: Vertical distribution of brittle star larvae in two contrasting coastal embayments: implications for larval transport

Comparison

Day

Night

B

p

Significant values (/10)

B

p

Significant values (/10)

Ophiocomina nigra

2-arms versus 4-arms

0.7581–4.1939

0.1228–0.6845

0

1.2453–4.5869

0.1009–0.5365

0

2-arms versus 6-arms

0.7326–5.3125

0.0702–0.6933

0

4.9815–8.3919

0.0151–0.0828

0

2-arms versus 8-arms

0.3855–7.3263

0.0257–0.8247

0

8.8555–12.0262

0.0024–0.0119

9

4-arms versus 6-arms

0.0386–2.7937

0.2474–0.9809

0

0.8973–3.8738

0.1441–0.6385

0

4-arms versus 8-arms

0.0640–4.9651

0.0835–0.9685

0

4.4786–10.6771

0.0048–0.1065

2

6-arms versus 8-arms

0.4258–4.8535

0.0883–0.8082

0

2.6250–9.7173

0.0078–0.2691

1

Ophiothrix fragilis

4/6-arms versus 6-arms

0.2352–4.3955

0.1111–0.8891

0

1.3854–4.4813

0.1064–0.5002

0

4/6-arms versus 8-arms

1.8961–5.7955

0.0551–0.3875

0

3.8105–8.5510

0.0139–0.1488

0

6-arms versus 8-arms

0.0805–5.0043

0.0819–0.9606

0

0.8471–3.1427

0.2078–0.6547

0

Amphiura filiformis

2-arms versus 4-arms

0.0517–4.0933

0.1292–0.9745

0

4.5020–9.1455

0.0103–0.1053

0

2-arms versus 6-arms

3.2263–6.0047

0.0497–0.1993

0

4.6089–8.5705

0.0138–0.0998

0

4-arms versus 6-arms

0.4486–4.1189

0.1275–0.7991

0

0.2305–3.2846

0.1935–0.8911

0

  1. Daytime and nighttime were separated to take into account potential diel vertical migration of larvae. The range of the test statistic B, its corresponding p values (p) and the number of significant p values (< 0.01) among the 10 combinations (see “Methods” section) are reported. The bold numbers indicate significant differences.