Skip to main content

Advertisement

Table 5 Summary results from a general linear mixed model for threespine sticklebacks from 25 freshwater locations testing for associations along the trophic axis (i.e. head shape axis in PC2 in Fig. 5) with predictor factors gillraker length and number, mean depth of lake, proportion of organic carbon obtained from littoral sources (α), trophic position (Tpos), sex and length (cm)

From: The temporal window of ecological adaptation in postglacial lakes: a comparison of head morphology, trophic position and habitat use in Norwegian threespine stickleback populations

Test Source DF Estimate ± SE F P
Trophic axis Intercept   0.004 ± 0.012   0.727
R2 = 0.41 Gillraker length (mm) 1 −0.019 ± 0.004 18.44 < 0.001
N fish = 481 Gillraker number 1 −0.001 ± 0.000 6.43 0.012
N populations = 25 Mean depth (m) 1 −0.001 ± 0.000 6.55 0.018
  α 1 0.000 ± 0.003 0.00 0.967
  Tpos 1 0.001 ± 0.003 0.26 0.612
  Sex 1 0.002 ± 0.001 10.65 0.001
  Total length (cm) 1 0.007 ± 0.001 32.57 < 0.001
  1. Lake identity was used as a random variable