... commercial diets Our work investigated the effects of different diets (live prey and dry diet) and weaning ages on growth and ontogeny of digestive function during the early development of pikeperch. .. species during the larval stage (Baras 1998) Ontogeny of the digestive system Few studies have been dedicated to the digestive system ontogeny of pikeperch larvae (Mani-Ponset et al 1994; Ostaszewska... histological study revealed the onset of all of the digestive structures of pikeperch larvae except the stomach Liver and pancreas were functional and the intestine contained enterocytes with a well-developed