Table 1.

Mixed model analysis of covariance results for growth in standard length and wet mass of Brachyrhaphis rhabdophora in a common-environment experiment

Response variable	Source of variation	Degrees of freedom (num/den)1	F-value	P-value
Standard length	Predation	1/10.4	0	0.9554
	Food amount	1/118	25.99	<0.0001
	Predation× food amount	1/118	11.58	0.0009
Wet mass	Predation	1/10.7	0.27	0.6151
	Food amount	1/120	17.01	<0.0001
	Predation× food amount	1/120	5.23	0.024

¹Fractional degrees of freedom are due to the Kenward–Roger adjustment (Kenward and Roger 1997).