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Table 5 Results of generalized linear models for testing the effect of herbivorous cichlid species of each 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      
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Species Estimate SE t value p
Intercept (Pcur) −11.6 1.3  −9.1 <0.001
Tmoo  −1.4 2.1  −0.7 NS
Ttem  −4.5 1.9  −2.3 <0.05
Vmoo  −0.5 1.8  −0.3 NS
 grazer      
Species Estimate SE t value p
Intercept (Iloo) −15.9 1.6 −10.2 <0.001
Pmac  3.2 2.0  1.6 NS
Ppol  4.1 2.1  2.0 NS
Phor  −2.9 2.2  −1.3 NS
Ptre  2.3 1.9  1.2 NS
δ 15 N      
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  Estimate SE t value p
Intercept (Pcur)  −1.0 0.4  −2.3 <0.05
Tmoo  −0.3 0.7  −0.5 NS
Ttem  1.0 0.6  1.7 NS
Vmoo  −0.1 0.6  −0.2 NS
 grazer      
  Estimate SE t value p
Intercept (Iloo)  −1.0 0.5  −2.0 NS
Pmac  0.2 0.7  0.3 NS
Ppol  −0.7 0.7  −1.1 NS
Phor  0.0 0.7  0.0 NS
Ptre  −1.1 0.7  −1.7 NS
  1. SE, standard error; DF, degree of freedom; NS, not significant.