Impact of diet on the fatty acids profile of European catfish (Silurus glanis L.)

• Autorzy: Jankowska B. , Zakes Z. , Zmijewski T. , Ulikowski D. , Kowalska A.

Warianty tytułu

PL

Wpływ pokarmu na profile kwasów tłuszczowych suma europejskiego (Silurus glanis L.)

• Języki publikacji: EN

Abstrakty

EN

The aim of this study was to determine the impact of diet on the fatty acids profile in European catfish meat. The study material was comprised of fish reared in earthen ponds and fed with natural food and fish fed intensively with artificial feed in a recirculating system. The quality of the fatty acids profile in the meat of the two groups differed. A total of twenty-eight acids were identified in the catfish reared on natural food. The fish fed artificial feed contained an additional two acids – 22:1n-9 and 16:4, which were also detected in the artificial feed. The combined total share of saturated acids, MUFA, and PUFA was similar. However, the share of most of the fatty acids from these groups, including total PUFA n-6 and n-3 and HUFA n-3 and n-6, differed significantly. The catfish fed on artificial feed contained more n-3 acids and fewer n-6 acids. Above all, this was caused by the greater share of 20:5n-3 (eicosapentaenoic, EPA), 22:6n-3 (docosahexaenoic, DHA), and 20:3n-3 and 20:4n-3 acids and the lesser share of 18:3n-3 (a-linolenic, ALA) acid. The meat of the fish from this group also contained fewer 20:4n-6 (arachidonic, AA), 20:3n-6, and 22:5n-6 acids. Additionally, the n-3/n-6 acid ratio was significantly different at 2.31 (pond culture) and 3.93 (intensive culture on artificial feed).

PL

Celem badań było porównanie profilu kwasów tłuszczowych mięsa suma europejskiego chowanego na pokarmie naturalnym i paszy sztucznej. Ustalono, że mięso obu grup sumów różniło się jakościowym składem kwasów tłuszczowych i udziałem większości z nich. W mięsie suma z chowu tradycyjnego stwierdzono obecność dodatkowych dwóch kwasów, występujących w ilości poniżej 1%, pochodzących z paszy (tab. 2 i 3). Badane ryby cechowała zbliżona łączna zawartość kwasów nasyconych, nienasyconych w tym mono- i polienowych oraz zróżnicowany poziom kwasów n-3 oraz n-6 (tab. 2). Porównując łączną zawartość kwasów polienowych rodziny n-3 stwierdzono, że mięso suma chowanego na paszy sztucznej posiadało ich więcej, natomiast zawierało ono mniej kwasów rodziny n-6. Istotne różnice pomiędzy obiema grupami ryb stwierdzono w przypadku kwasów; 18:3n-3 (α-linolenowy, ALA), 20:3n-3,20:4n-3 (eiko- zatetraenowy), 20:5n-3 (eikozapentaenowy, EPA), 22:6n-3 (dokozaheksaenowy, DHA) oraz 20:4n-6 (arachidonowy, AA), 20:3n-6, i 22:5n-6 (dokozapentaenowy). Charakterystyczny dla ryb żywionych paszą sztuczną był też wyższy poziom wysokonienasyconych kwasów tłuszczowych (HUFA) n-3 i niższa zawartość HUFA n-6 (tab. 4).

Słowa kluczowe

EN

fish; feeding; diet; fatty acid profile; European catfish; Silurus glanis; intensive culture

• Wydawca: -
• Czasopismo: Archives of Polish Fisheries
• Rocznik: 2004
• Tom: 12
• Numer: 2
• Opis fizyczny: p.99-110,ref.

Twórcy

autor

Jankowska B.

• Chair of Meat Technology and Chemistry, Faculty of Food Sciences, Uniwersity of Warmia and Mazury in Olsztyn, pl.Cieszynski 1, 10-718 Olsztyn, Poland

autor

Zakes Z.

• The Stanislaw Sakowicz Inland Fisheries Institute in Olsztyn, Poland

autor

Zmijewski T.

• Chair of Meat Technology and Chemistry, Faculty of Food Sciences, Uniwersity of Warmia and Mazury in Olsztyn, pl.Cieszynski 1, 10-718 Olsztyn, Poland

autor

Ulikowski D.

• The Stanislaw Sakowicz Inland Fisheries Institute in Olsztyn, Poland

autor

Kowalska A.

• The Stanislaw Sakowicz Inland Fisheries Institute in Olsztyn, Poland

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