SDÜ Eğirdir Su Ürünleri Fakültesi Dergisi, Cilt 1, Sayı 2 (2005)

Development of the liver and pancreas in the rainbow trout (Oncorhynchus mykiss)



In this study, we aimed to determine the histochem ical structure and histological characters of development of the liver and pancreas. The development of the liver and
pancreas was observed through different development periods in light microscopic. In total, 35 rainbow trouts (Oncorhynchus mykiss) were used. The lobules and bile ducts were studied in the liver in the early development periods. In addition, the dense PAS (+) characters and glycogen in hepatocytes were observed in the same periods. In the following periods, the weak PAS (+) and AB (+) chara cters were found in hepatocytes during the development of the lobules and bile duct. The reaction against PAS was also observed in the apical cells of the bile duct. During the early development periods, islets of langerhans were found in a few samples. But, their number increased in the following periods. During all of the development periods, these cells in the exocrine part were proved to be of basophilic characters. Histochemical methods were applied on pancreas were in all periods.

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