Analysis of covariance for feeding rate (rF) in H Analysis of covariance for feeding rate (rF) in H. erythrogramma with body mass (AFDM) as primary independent variable (continuous), and temperature and pH as covariates (categorical, two levels of each). Analysis of covariance for feeding rate (rF) in H. erythrogramma with body mass (AFDM) as primary independent variable (continuous), and temperature and pH as covariates (categorical, two levels of each) Nicholas Carey et al. J Exp Biol 2016;219:1178-1186 © 2016. Published by The Company of Biologists Ltd