Table 4 Results of generalized linear models for testing the effect of cichlid species of each ecomorph on carbon and nitrogen stable isotope ratios of their muscles

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Estimate

SE

t value

p

Intercept (Ldar)

−16.9

0.7

−25.3

<0.001

Pcur

 9.0

0.9

 9.5

<0.001

Sdia

 3.4

0.9

 3.6

<0.01

Tmoo

 6.0

0.9

 6.3

<0.001

Ttem

 0.5

0.9

 0.6

NS

Tvit

 4.3

0.9

 4.6

<0.001

Vmoo

 2.5

0.9

 2.6

<0.05

 grazer

Estimate

SE

t value

p

Intercept (Iloo)

−14.4

0.6

−25.2

<0.001

Pfam

 1.9

0.8

 2.3

<0.05

Pfas

 1.8

0.8

 2.3

<0.05

Pmac

 4.2

0.8

 5.2

<0.001

Ppol

 3.9

0.8

 4.9

<0.001

Phor

 −2.5

0.9

 −2.9

<0.01

Ptre

 0.5

0.8

 0.6

NS

δ¹⁵ N

 browser

Estimate

SE

t value

p

Intercept (Ldar)

 6.2

0.3

 24.3

<0.001

Pcur

 −1.6

0.4

 −4.3

<0.001

Sdia

 −0.1

0.4

 −0.3

NS

Tmoo

 −1.8

0.4

 −5.1

<0.001

Ttem

 −0.3

0.4

 −0.9

NS

Tvit

 −1.3

0.4

 −3.7

<0.001

Vmoo

 0.1

0.4

 0.3

NS

 grazer

Estimate

SE

t value

p

Intercept (Iloo)

 3.6

0.2

 16.5

<0.001

Pfam

 0.3

0.3

 0.9

NS

Pfas

 0.6

0.3

 2.0

NS

Pmac

 1.6

0.3

 5.3

<0.001

Ppol

 0.2

0.3

 0.6

NS

Phor

 0.5

0.3

 1.7

NS

Ptre

 1.0

0.3

 3.2

<0.01