Acronym NA
Category
Aquaculture
Title Effect of bioactive fatty acids on survival (IPN/PD), growth and feed conversion in 0+ and 1+ Atlantic salmon Programme National Programme
Instrument (FP6)
Contact Type (FP7)
Strand (Interreg)
NA
Theme (FP7)
Activity Area (FP6)
Regional Area (Interreg)
Action (COST)
NA
Specific Programme (FP7)
NA
Funding source National Coordinator Trygve Sigholt Coordinator email trygve.sigholt@biomar.no
Coordinator institution
NA
Institutions involved
NA
Start year 2006 End year 2009 Funding (€) € 1,040,232 Website https://prosjektbanken.forskningsradet.no/en/project/FORISS/174215?Kilde=FORISS&Kilde=EU&distribution=Ar&chart=bar&calcType=funding&Sprak=no&sortBy=date&sortOrder=desc&resultCount=30&offset=4200<P.1=LTP2+Hav Summary The main objectives of the present user-directed innovation project have been to obtain knowledge about the potential of the bioactive fatty acidtetradecylthioacetic acid (TTA) in feeds for commercial farmed Atlantic salmon. During the experimental period it has been shown a significant positive effect of dietary TTA in natural outbreaks of two virus diseases of vital economic importance (lack of good vaccines). Reduced mortality after administration of TTA may be related to a combination of anti-inflammatory effects and a re-allocation of dietary fatty acids from storage to energy producing oxidation. The energy enhancing effect of TTA was documented in a dose response trial showing reduced fat content in the flesh by increasing dietary level of TTA in post-smolt 1+. As fat content and fat reserves stored in the fish are shown to be of importance for maturation, by administration of TTA the salmon may not accumulate high enough energy stores to start the maturation process. Dietary supplementation of TTA resulted in an up to threefold reduction in incidence of sexual mature post-smolt Atlantic salmon. An important aspect was also to get a better understanding of how dietary levels of TTA, as well as time and duration of the feeding, affect production and quality parameters. By giving the right dose of dietary TTA to farmed salmon at the right time it may be concluded: (1) No reduced growth when fed to small salmon; (2) Numerically improved growth and feed conversion when given to large salmon; (3) Avoiding visual abnormal kidneys provoked by uncontrolled us of dietary TTA; (4) No negative effects on cataract; (5) No negative effects on pigmentation and visual colour of the fillet. Finally, before preparing practical diets for the salmon industry a good documentation of the wash out of TTA from the fish was necessary. The present project has provided accumulation and washes out data of TTA in untrimmed salmon fillets. The results from the present studies are so far published in four scientific articles and three patent applications are submitted.
Goal:
Use of the bioactive fatty acid TTA in feed for farmed Atlantic salmon and effect on growth, FCR and IPN, PD and HSMI.
Keywords
Growth rate;
Fish quality;
Fish;
Salmon;
Diets;
Feed composition;
Fish health;
Bioactive compounds;
Marine Region
13
Northern North Sea (27.IVa)
1
Marine Region Map
