Fatty acids profile in dorsal and ventral sections of fillets from European catfish (Silurus glanis L.) fed various feeds

Abstract

The aim of the research was to compare the basic composition and fatty acids profile from dorsal and ventral fillets of European catfish cultivated in earthen ponds on natural feed with those from fish fed artificial feed under intensive cultivation in recirculating systems. The lipid content in the dorsal and ventral fillets of catfish fed natural feed varied and were higher in the ventral fillets (P < 0.01). The lipid content of catfish fed artificial feed was equal (P > 0.01). The fatty acids profiles of dorsal and ventral fillets from catfish fed natural feed differed, while no such differences were noted in the fillets of fish fed artificial feed. It was revealed that the differences between the dorsal and ventral fillets of catfish cultivated on natural feed mainly regarded unsaturated; this led to different relationships between the amounts of MUFA and PUFA. This was due to the various amounts of oleic, palmitic, and mainly docosahexaenoic (DHA) acids. It was also determined that a 100 g ventral fillet from catfish cultivated on natural feed had an approximately two-fold higher content of various fatty acids, especially those from the valuable n-3 group, than did dorsal fillets. No such difference was noted in catfish cultivated with artificial feed in recirculating systems.

CORRESPONDING AUTHOR:

Dr Barbara Jankowska, Uniwersytet Warmińsko-Mazurski, Katedra Technologii i Chemii Mięsa, pl. Cieszyński 1, 10-718 Olsztyn, Tel./Fax:+48 (89) 5233694;
e-mail: barbara.jankowska@uwm.edu.pl