Mean digestible energy intake per day was 0.147 MJ/kg (range
0.036–0.424 MJ/kg). DEwas not significantly associatedwith energy intake.
Water temperature was significantly associated with total energy
intake with p-value b 0.001. With an increase of water temperature
across the IQR (5.2–10.3 °C), total daily energy intake increased by
0.10 MJ/kg. Fish size was negatively associated with daily digestible
energy intake (coefficient −0.016, p b 0.001), and an increase of fish
size from 2.5 to 4.5 kg (IQR) gave a reduction in daily digestible energy
intake of 0.03 MJ/kg. The proportion of variance at site level was high
(19.8%) and significant (p b 0.001).