Gå direkte til innhold
 

Tailoring salmon feeds of the future to maximize utilization of EPA and DHA

The proposed project aims to develop strategies to maintain adequate levels of EPA and DHA in salmon fillet with low levels in the feed, to support the best possible utilization of this limited resource while ensuring that salmon is still a good source of these nutrients. This project will continue an ongoing collaboration between Skretting and NIFES in a project aiming to determine the requirement of EPA and DHA in salmon through the whole seawater production cycle, by feeding graded levels of EPA+DHA f rom about 1-5% of total lipid at two different temperatures (#217478). Unexpected results from this trial will be followed-up by re-running all diet groups at 12°C. Furthermore, material from a large scale CAC-trial testing two different levels of EPA and DHA will be utilized for in-depth studies on the consequences of low levels of these fatty acids on fish health, lipid metabolism and fatty acid retention.Furthermore, an additional feeding trial will be run to investigate possible effects of dietary n- 3/n-6 ratio and level of saturated fatty acids on fillet accumulation of EPA and DHA and on lipid metabolism and fish health. To extract additional information from all of these three feeding trials, in-depth analyses will be performed by subtraction libr ary and proteomics to elucidate molecular mechanisms. Additionally, the metabolic fate of C18 precursors will be quantified by in vitro studies on hepatocytes isolated from fish fed varying levels of EPA and DHA. Finally, transcriptional control of lipid homeostasis will be investigated by developing new methodology for Atlantic salmon in this area. Method development will be done in close collaboration with the existing project Nutritox #200506, taking advantage of method development and international co llaboration within this project.

Prosjektleder:
Rune Waagbø
Institusjon:
Instituttsektor/sjømatforskning (NIFES)/Nasjonalt institutt for ernæri
Aktivitetsnavn:
Havbruk - en næring i vekst
Prosjektstatus:
Bevilgning
Prosjektperiode:
01.01.2013 - 31.12.2015
Geografi:
Norge/HORDALAND/BERGEN
Fagområder:
Landbruks- og fiskerifag/Fiskerifag/Akvakultur
Prosjektnummer:
225086