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Comparison of meat quality of tench, Tinca tinca , reared in extensive and semi‐intensive culture systems
Author(s) -
Ljubojević D.,
Ćirković M.,
Novakov N.,
Puvača N.,
Aleksić N.,
Lujić J.,
Jovanović R.
Publication year - 2014
Publication title -
journal of applied ichthyology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.392
H-Index - 62
eISSN - 1439-0426
pISSN - 0175-8659
DOI - 10.1111/jai.12425
Subject(s) - biology , food science , linseed oil , docosahexaenoic acid , eicosapentaenoic acid , composition (language) , fish oil , aquaculture , rapeseed , live food , fatty acid , fish <actinopterygii> , polyunsaturated fatty acid , zoology , fishery , biochemistry , linguistics , philosophy
Summary The aim of the study was to examine the production parameters and chemical composition of fillets in tench, Tinca tinca L., farmed in one of two systems: an extensive system based on only natural food ( NF ) available in the fish ponds; and a semi‐intensive system based on natural food plus the addition of formulated feeds supplemented with various oils: fish ( FO ), rapeseed ( RO ), soybean ( SO ), or linseed oil ( LO ). Proper pond preparation resulted in a favourable amount and structure of natural food in all ponds. The rearing system had a significant influence on the tench yield, muscle lipid contents and fatty acid composition, and the supplemented feed influenced the fatty acid composition. The percentages of eicosapentaenoic ( EPA ) and docosahexaenoic ( DHA ) acid and total highly unsaturated n‐3 fatty acids (n‐3 HUFA ) were higher in the fish oil and the natural food groups than in the others. The n‐3/n‐6 ratio in the five dietary treatments was notably variable, and in any case higher in fillets than in the diets. In conclusion, the present study suggests that RO , SO and LO represent effective lipid sources for tench fed formulated diets. On the other hand, tench that fed on naturally available pond foods had a high content of n‐3 HUFA in their muscle lipids, but poor growth parameters and low yields.