Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

You are what your fish eat!

27.02.2008
When the diets of farmed fish are altered, the food we ingest also changes.

For his doctorate, Sverre Ludvig Seierstad investigated the biological consequences of exchanging the fish oils commonly used in fish feed with vegetable oils. What consequences might this have on both fish and human health? The research project “Fjord til bord (Fjord to table)” has been a collaboration between the Norwegian School of Veterinary Science, the National institute for Nutrition and Seafood Research (NIFES), Nutreco ARC and Ullevål University Hospital.

The main ingredients of fish feed have traditionally been of marine origin. For several reasons, including increased demand for and production of farmed fish, and climatic considerations, feed ingredients of marine origin are becoming both scarce and expensive. The fish farming industry therefore wishes to utilise alternative lipid (fat) sources in feed used for salmon farming.

Vegetable oils have been shown to stimulate the appetite and feed intake of fish, and to increase growth rate and carcase quality. This doctorate investigated some consequences of the use of these alternative fish oils in the feed on the health of both fish and man. Marine oils are rich in long-chain omega-3 fatty acids (EPA and DHA), which have been shown to have beneficial effects on heart and circulatory system disease in man. Seierstad’s research focussed on the behaviour of marker substances for heart and blood vessel parameters, and for inflammation, in both salmon and humans.

... more about:
»Marine »acid »feed »patients

The feeding trials with farmed salmon were carried out at Gildeskål and in Stavanger. Wild salmon, caught in Namsen (Lilleøen, Namsos), were used as a reference group.

During his studies, Sverre Seierstad investigated the development of thickenings in the wall of the cardiac arteries of Atlantic salmon at different stages of the fish’s life cycle and showed that the composition of fats in the feed had no effect on the development of constrictions in the cardiac arteries of farmed salmon.

In collaboration with Ullevål Hospital, heart patients with atherosclerosis (disease of the cardiac arteries) were placed on three different diets, using salmon meat containing varying amounts of fish oil and vegetable oil. It was shown that the fat composition of the salmon meat affected the fatty acid profile of the patients’ blood and that the advantageous marine omega-3 fatty acids increased markedly in those patients that ate fish fed on feed containing pure fish oils. It was also shown that in these patients the levels of marker substances for heart and vessel disease were much better than in patients eating fish fed pure rapeseed oil.

Sverre Ludvig Seierstad defended his Dr. Med. Vet. thesis with the title “The effect on fish and human health of replacing marine oils by vegetable oils in feeds of Atlantic salmon”, at the Norwegian School of Veterinary Science on February 15, 2008.

Magnhild Jenssen | alfa
Further information:
http://www.veths.no/105/English/7899/You-are-what-your-fish-eat/

Further reports about: Marine acid feed patients

More articles from Life Sciences:

nachricht Transport of molecular motors into cilia
28.03.2017 | Aarhus University

nachricht Asian dust providing key nutrients for California's giant sequoias
28.03.2017 | University of California - Riverside

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: A Challenging European Research Project to Develop New Tiny Microscopes

The Institute of Semiconductor Technology and the Institute of Physical and Theoretical Chemistry, both members of the Laboratory for Emerging Nanometrology (LENA), at Technische Universität Braunschweig are partners in a new European research project entitled ChipScope, which aims to develop a completely new and extremely small optical microscope capable of observing the interior of living cells in real time. A consortium of 7 partners from 5 countries will tackle this issue with very ambitious objectives during a four-year research program.

To demonstrate the usefulness of this new scientific tool, at the end of the project the developed chip-sized microscope will be used to observe in real-time...

Im Focus: Giant Magnetic Fields in the Universe

Astronomers from Bonn and Tautenburg in Thuringia (Germany) used the 100-m radio telescope at Effelsberg to observe several galaxy clusters. At the edges of these large accumulations of dark matter, stellar systems (galaxies), hot gas, and charged particles, they found magnetic fields that are exceptionally ordered over distances of many million light years. This makes them the most extended magnetic fields in the universe known so far.

The results will be published on March 22 in the journal „Astronomy & Astrophysics“.

Galaxy clusters are the largest gravitationally bound structures in the universe. With a typical extent of about 10 million light years, i.e. 100 times the...

Im Focus: Tracing down linear ubiquitination

Researchers at the Goethe University Frankfurt, together with partners from the University of Tübingen in Germany and Queen Mary University as well as Francis Crick Institute from London (UK) have developed a novel technology to decipher the secret ubiquitin code.

Ubiquitin is a small protein that can be linked to other cellular proteins, thereby controlling and modulating their functions. The attachment occurs in many...

Im Focus: Perovskite edges can be tuned for optoelectronic performance

Layered 2D material improves efficiency for solar cells and LEDs

In the eternal search for next generation high-efficiency solar cells and LEDs, scientists at Los Alamos National Laboratory and their partners are creating...

Im Focus: Polymer-coated silicon nanosheets as alternative to graphene: A perfect team for nanoelectronics

Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are less stable. Now researchers at the Technical University of Munich (TUM) have, for the first time ever, produced a composite material combining silicon nanosheets and a polymer that is both UV-resistant and easy to process. This brings the scientists a significant step closer to industrial applications like flexible displays and photosensors.

Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

International Land Use Symposium ILUS 2017: Call for Abstracts and Registration open

20.03.2017 | Event News

CONNECT 2017: International congress on connective tissue

14.03.2017 | Event News

ICTM Conference: Turbine Construction between Big Data and Additive Manufacturing

07.03.2017 | Event News

 
Latest News

Transport of molecular motors into cilia

28.03.2017 | Life Sciences

A novel hybrid UAV that may change the way people operate drones

28.03.2017 | Information Technology

NASA spacecraft investigate clues in radiation belts

28.03.2017 | Physics and Astronomy

VideoLinks
B2B-VideoLinks
More VideoLinks >>>