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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

From: Depth segregation and diet disparity revealed by stable isotope analyses in sympatric herbivorous cichlids in Lake Tanganyika

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