Table 3. Logistic regression of real dispersal frequencies on simulated dispersal frequencies for surviving White-browed Babblers (Model 1) and all birds (Model 2) (with change in deviance distributed as Chi-squared).


Residual deviance
df
Change in deviance
Change in df
Significance

Model 1 survivors
Simulated frequency (f)

142.04

212

32.68

1

P < 0.001

logit (chance of successful dispersal) = - 5.572+ 0.0546 f


Model 2 all babblers
Simulated frequency (f)


140.32

225

37.34

1

P < 0.001

logit (chance of successful dispersal) = - 5.987 + 0.0577 f