The quantity of food in the complete digestive tract of young‐of‐the‐year yellow perch Perca flavescens varied between samples taken at the same time of the day over 2–3 consecutive days, resulting in a 1·7‐ to 2·5‐fold variation of in situ estimates of daily ration. Increased food intake rates were related to increased consumption of large prey items suggesting a day‐to‐day pattern in the quantity and size of food consumed.
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Grant et al. (1999) studied this question.
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