Barnabé (1990) reported that there was relationship between the length of larvae of several freshwater species and size of dietary particles, for example, small common carp (Cyprinus carpio) fry of 6.0–7.0 mm fed on zooplankton of 100–300 μm; tench (Tinca tinca) larvae of 4.5–5.5 mm ingested food particles of 50–100 μm; and pike (Esox lucius) fry of 11.0–14.0 mm
began feeding on copepod nauplii of 200–500 μm