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. 2015 May 14;1:15. doi: 10.1186/s40851-015-0016-1

Table 3.

Results of the generalized linear mixed-model analysis for testing the effect of cichlid ecomorph on carbon and nitrogen stable isotope ratios of periphyton within their territories

δ 13 C
  Ecomorph Estimate SE DF t value p
   Intercept (browser) −13.17 1.20 6.4 −10.98 <0.001
   grazer  −1.24 1.61 6.4  −0.77 NS
   scraper  3.12 2.63 5.9  1.19 NS
  Post-hoc test Estimate SE z value p
   grazer-browser  −1.24 1.61  −0.77 NS
   scraper-browser  3.12 2.63  1.19 NS
   scraper-grazer  4.36 2.57  1.69 NS
δ 15 N
  Ecomorph Estimate SE DF t value p
   Intercept (browser)  −0.81 0.30 7.0  −2.70 <0.05
   grazer  −0.57 0.41 7.2  −1.41 NS
   scraper  −1.17 0.65 6.1  −1.80 NS
  Post-hoc test Estimate SE z value p
   grazer-browser  −0.57 0.41  −1.41 NS
   scraper-browser  −1.17 0.65  −1.80 NS
   scraper-grazer  −0.59 0.64  −0.93 NS

Species are included as a nested factor of ecomorph. SE, standard error; DF, degree of freedom; NS, not significant.