Effects of different dietary fatty acids profiles on the growth performance and body composition of juvenile tench (Tinca tinca (L.))

• Published in: Reviews in fish biology and fisheries Vol. 20; no. 3; pp. 389 - 401
• Main Authors: Zakęś, Zdzisław, Jankowska, Barbara, Jarmołowicz, Sylwia, Żmijewski, Tomasz, Partyka, Konrad, Demska-Zakęś, Krystyna
• Format: Journal Article
• Language: English
• Published: Dordrecht Dordrecht : Springer Netherlands 01-09-2010; Springer Netherlands; Springer Nature B.V
• Subjects: Analysis; Biomedical and Life Sciences; Body composition; Diet; Fatty acids; Fish; Fish oils; Fisheries; Freshwater & Marine Ecology; Growth performance; Life Sciences; Lipids; Nutrients; Nutrients retention; Oils & fats; Peanut oil; Physical growth; Ponds; Proteins; Rapeseed oil; Research Paper; Studies; Tinca tinca; vegetable oil; Vegetable oils; Water temperature; Zoology; Vegetable oils; Nutrients retention; Fatty acids; Tench; Growth performance
• ISSN: 0960-3166; 1573-5184
• DOI: 10.1007/s11160-009-9146-x

Juvenile tench (initial weight of about 57 g) were fed feed supplemented with fish oil (group FO), linseed oil (group LO), peanut oil (group PO), or rapeseed oil (group RO) containing 47% protein and 12% fat for 55 days. The inclusion of the tested oils was 50 g kg⁻¹ (42% total crude lipids in diets). No significant differences were noted in the fish growth performance. The proximate composition of the whole fish bodies and the viscera (water, protein, fat, ash) was similar in all the dietary treatments (P > 0.05). Differences were noted only with regard to the ash content of the fillets (P < 0.05). The analysis of the fatty acids profiles of tench (whole fish) indicated there were significant differences in the total content of monoenoic and polyenoic (PUFA) acids. Significant differences were also noted with regard to n-3 PUFA and n-6 PUFA. Consequently, the ratio of n-3/n-6 acids ranged from 1.6 (group PO) to 2.08 (group LO; P < 0.05). The feed applied was not confirmed to have had an impact on the fatty acids profile of the tench fillets. There was a statistically significant intergroup difference in the content of saturated fatty acids (SFA) in tench viscera. In the fish fed vegetable oils supplemented diets, the level of SFA was lower (P < 0.05).