Table 4 Mode and 95% confidence intervals for the parameters of an isolation-with-migration model estimated using IM for Western Pacific (WP) populations (Vanuatu, Fiji and Samoa) and Central Pacific (CP) populations of both species

From: High gene flow due to pelagic larval dispersal among South Pacific archipelagos in two amphidromous gastropods (Neritomorpha: Neritidae)

 

θ West Pacific

θ Central Pacific

θ Ancestral

tsplit

Nem (CP → WP)

Westward migration events

Eastward migration events

 

Neritina canalis—Society Islands and Western Pacific

Mode

0.375

0.187

0.117

0.0033

0.49

0

0

 95% low

0.252

0.129

0.075

0.0026

0.49

0

0

 95% high

0.967

0.310

0.456

0.0088

5.36

2

1

 

N. canalis—Marquesas and Western Pacific

Mode

0.725

0.060

0.122

0.0020

8.48

2

0

 95% low

0.429

0.029

0.079

0.0014

0.94

0

0

 95% high

2.121

0.125

0.381

0.0091

40.5

13

5

 

Neripteron dilatatus—Society Islands and Western Pacific

Mode

2.582

0.322

0.071

0.0015

104

13

3

 95% low

1.341

0.168

0.041

0.0011

23.5

4

1

 95% high

9.361

1.659

0.130

0.0021

3830

238

191

  1. Confidence intervals for westerly Nem are given for the parameter m, conditional on the modal value of θ for the West Pacific. Time estimates are scaled by the reciprocal of the per-site mutation rate, 1/μ, and estimates of θ are per site.
Back to article page