Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Special chip provides better picture of salmon health

17.10.2006
How do you tell if a fish is fit and well? This is a question which has troubled farmers and biologists for years, but now scientists may have come up with the answer - using DNA chips.

By studying the genes of Atlantic salmon scientists from three UK universities are developing a DNA chip to monitor the health and performance of salmon, a tool which could both save the salmon industry thousands and also help conserve dwindling wild salmon populations.

Atlantic salmon are the most important farmed fish in the UK and a disappearing species in the wild. They are particularly vulnerable to infection because of the dramatic physical and chemical changes they go through, known as smoltification, which enable them to live in both fresh and salt water.

Assessing their health and performance is very difficult as conventional measures used in other animals, such as temperature, blood protein levels and general demeanour, are not relevant or are difficult to assess in fish.

Farmers and conservationists currently have to rely on the general appearance of salmon as an indicator of their health, which is far from ideal. The new DNA chip will help farmers assess the state of their stock more accurately and also enable conservationists to sample wild populations to ascertain their health and wellbeing.

The development of the chip is the culmination of a four-year study known as Salmon TRAITS (Transcription Analysis of Important Traits in Salmon) being carried out by scientists at the Universities of Stirling, Aberdeen and Cardiff, together with ARK Genomics at the Roslin Institute and researchers at the Norwegian School of Veterinary Science. Funding for the project is from the Biotechnology and Biological Sciences Research Council’s (BBSRC) Exploiting Genomics initiative.

To develop a more effective method of monitoring salmon health and performance the scientists have been studying salmon gene expression. By doing this, they have identified genes which play different roles in the lifecycle of salmon, for example immune response.

Professor Chris Secombes lead researcher from the University of Aberdeen explained: “We have identified hundreds of genes which are increased or decreased following infection, many of which may be indicators of disease. We have also looked at what other factors impact on these genes, such as nutrition. We are now working to encode this information onto a chip which could help farmers monitor the health and performance of their stocks through methods such as changing their nutritional intake.”

So far the scientists have identified the genes and metabolic pathways which influence the most commercially important traits for the production of salmon. These are; the supply of contaminant-free highly unsaturated oils, including omega-3s, for the salmon diet, their long and complex lifecycle, infectious disease, and protein growth efficiency.

Professor Alan Teale, lead researcher at the Institute of Aquaculture at the University of Stirling and Co-ordinator of TRAITS explained: “What we are working on is precision aquaculture, where we use very sensitive measures – gene expression – to pre-empt any adverse production changes in farmed fish populations as well as to maximise their health and wellbeing. This in turn will increase competitiveness and profitability for the salmon farmer.

“We have identified genes involved in polyunsaturated fatty acid metabolism, protein metabolism, bacterial and viral infection, and freshwater to seawater adaptation. The DNA chip will be able to identify changes in the activity of these genes and so alert us to any potential problems. It is too early to tell whether this chip will be a commercial success, but it certainly has the potential to be extremely useful to industry,” Professor Teale said.

Professor Julia Goodfellow, BBSRC Chief Executive, said: “This is another important step forward in genomics research, not only does it further our knowledge base, it also offers tangible benefits for the aquaculture industry and for the conservation of wild salmon, offering the chance to reverse the decline in Britain’s salmon population.”

Matt Goode | alfa
Further information:
http://www.bbsrc.ac.uk

More articles from Ecology, The Environment and Conservation:

nachricht Dispersal of Fish Eggs by Water Birds – Just a Myth?
19.02.2018 | Universität Basel

nachricht Removing fossil fuel subsidies will not reduce CO2 emissions as much as hoped
08.02.2018 | International Institute for Applied Systems Analysis (IIASA)

All articles from Ecology, The Environment and Conservation >>>

The most recent press releases about innovation >>>

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

Im Focus: LZH showcases laser material processing of tomorrow at the LASYS 2018

At the LASYS 2018, from June 5th to 7th, the Laser Zentrum Hannover e.V. (LZH) will be showcasing processes for the laser material processing of tomorrow in hall 4 at stand 4E75. With blown bomb shells the LZH will present first results of a research project on civil security.

At this year's LASYS, the LZH will exhibit light-based processes such as cutting, welding, ablation and structuring as well as additive manufacturing for...

Im Focus: Self-illuminating pixels for a new display generation

There are videos on the internet that can make one marvel at technology. For example, a smartphone is casually bent around the arm or a thin-film display is rolled in all directions and with almost every diameter. From the user's point of view, this looks fantastic. From a professional point of view, however, the question arises: Is that already possible?

At Display Week 2018, scientists from the Fraunhofer Institute for Applied Polymer Research IAP will be demonstrating today’s technological possibilities and...

Im Focus: Explanation for puzzling quantum oscillations has been found

So-called quantum many-body scars allow quantum systems to stay out of equilibrium much longer, explaining experiment | Study published in Nature Physics

Recently, researchers from Harvard and MIT succeeded in trapping a record 53 atoms and individually controlling their quantum state, realizing what is called a...

Im Focus: Dozens of binaries from Milky Way's globular clusters could be detectable by LISA

Next-generation gravitational wave detector in space will complement LIGO on Earth

The historic first detection of gravitational waves from colliding black holes far outside our galaxy opened a new window to understanding the universe. A...

Im Focus: Entangled atoms shine in unison

A team led by Austrian experimental physicist Rainer Blatt has succeeded in characterizing the quantum entanglement of two spatially separated atoms by observing their light emission. This fundamental demonstration could lead to the development of highly sensitive optical gradiometers for the precise measurement of the gravitational field or the earth's magnetic field.

The age of quantum technology has long been heralded. Decades of research into the quantum world have led to the development of methods that make it possible...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

Save the date: Forum European Neuroscience – 07-11 July 2018 in Berlin, Germany

02.05.2018 | Event News

Invitation to the upcoming "Current Topics in Bioinformatics: Big Data in Genomics and Medicine"

13.04.2018 | Event News

Unique scope of UV LED technologies and applications presented in Berlin: ICULTA-2018

12.04.2018 | Event News

 
Latest News

Designer cells: artificial enzyme can activate a gene switch

22.05.2018 | Life Sciences

PR of MCC: Carbon removal from atmosphere unavoidable for 1.5 degree target

22.05.2018 | Earth Sciences

Achema 2018: New camera system monitors distillation and helps save energy

22.05.2018 | Trade Fair News

VideoLinks
Science & Research
Overview of more VideoLinks >>>