Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Know your fish!

28.03.2018

A Kiel research team has developed a new method for tracing protein sources of farmed and wild salmon

More than half of the world’s fish and seafood products come from aquaculture. The increasing demand and the simultaneous decline of the natural stocks due to overfishing have led to strong growth of the aquaculture industry for decades. To reduce costs and impact on wild fish stocks, carnivorous fish are increasingly fed plant-based diets in aquaculture.


Salmon packed in the cooling shelf of a high-end supermarket in Shanghai/China. Kiel researcher developed a new method for tracing protein sources of farmed and wild salmon.

Foto: Thomas Larssen, Kiel University

However, the rapid development in aquaculture fish production has not been matched by new methods that accurately can trace the food chain supply in aquaculture production. With stable isotope fingerprinting, an international team lead by researchers from Kiel University and the Kiel Cluster of Excellence "The Future Ocean" has developed a new method for identifying the protein sources of salmon with high accuracy. In this way, conclusions can be drawn about the origin and nutrition of individual fish. The results of the study were recently published in the international journal Food Chemistry.

In recent years, commercial compound diets in aquaculture have gone from a single source of protein, fishmeal, and a single source of lipid, fish oil, to more than several dozen ingredients such as soy, insects, macroalgae, mussels and yeast.

For example, since 2015 conventionally farmed Atlantic salmon (Salmo salar L.) have been fed only 20% marine based diets as opposed to 90% four decades ago. This diversification in feed ingredients has brought benefits in terms of reduced production costs and has, at least in part, decreased pressure on wild fish stocks.

However, up to now new methods that can accurately trace the food chain supply in aquaculture production had been missing. Since consumers are increasingly demanding food safety, traceability, and sustainability, there is a pressing need to develop new authentication and traceability methods. For the first time, an international team lead by researchers at Kiel University and the Kiel Cluster of Excellence "The Future Ocean" has succeeded in developing such an efficient authentication method.

“Our method, stable isotope fingerprinting of amino acids, has several advantages compared to conventional methods. For the first time, we can differentiate organic, conventional, and wild salmon from different origins” explains first author Dr. Yiming Wang from the Leibniz-Laboratory for Radiometric Dating and Stable Isotope Research at Kiel University. “We are also able to differentiate salmon fed alternative diet ingredients such as insect meal and macroalgae.”

The new method will help to ensure that sustainable aquaculture products are produced in compliance with standards such as the EU Ecolabel and other organic certification programs. Potentially, the isotope fingerprinting method can also support the new blockchain movement for enhancing food safety and production transparency.

“We are very excited about our findings,” says the senior author Dr. Thomas Larsen Leibniz Laboratory for Radiometric Dating and Stable Isotope Research at Kiel University. “Our method can be expanded to authenticate other seafood products. This is a step towards promoting healthy and environmentally sound aquaculture practices.”

Read the full story here: https://authors.elsevier.com/a/1Wj3s16Ds1e1jV. Free download until May 3, 2018.

Original Work
Wang, Y. V., A. H. L. Wan, E.-J. Lock, N. Andersen, C. Winter-Schuh, and T. Larsen. 2018. Know your fish: A novel compound-specific isotope approach for tracing wild and farmed salmon. Food Chemistry 256:380-389. https://doi.org/10.1016/j.foodchem.2018.02.095

Links
https://authors.elsevier.com/a/1Wj3s16Ds1e1jV
http://www.futureocean.org
http://www.leibniz.uni-kiel.de/en

Contact
Dr. Yiming Wang, ywang@leibniz.uni-kiel.de

Friederike Balzereit
Public Relations
Cluster of Excellence „The Future Ocean”
0431-880-3032, fbalzereit@uv.uni-kiel.de

Weitere Informationen:

http://www.uni-kiel.de/pressemeldungen/index.php?pmid=2018-079-aquakultur&la...

Dr. Boris Pawlowski | Christian-Albrechts-Universität zu Kiel

More articles from Life Sciences:

nachricht New type of photosynthesis discovered
17.06.2018 | Imperial College London

nachricht New ID pictures of conducting polymers discover a surprise ABBA fan
17.06.2018 | University of Warwick

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

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

Im Focus: AchemAsia 2019 will take place in Shanghai

Moving into its fourth decade, AchemAsia is setting out for new horizons: The International Expo and Innovation Forum for Sustainable Chemical Production will take place from 21-23 May 2019 in Shanghai, China. With an updated event profile, the eleventh edition focusses on topics that are especially relevant for the Chinese process industry, putting a strong emphasis on sustainability and innovation.

Founded in 1989 as a spin-off of ACHEMA to cater to the needs of China’s then developing industry, AchemAsia has since grown into a platform where the latest...

Im Focus: First real-time test of Li-Fi utilization for the industrial Internet of Things

The BMBF-funded OWICELLS project was successfully completed with a final presentation at the BMW plant in Munich. The presentation demonstrated a Li-Fi communication with a mobile robot, while the robot carried out usual production processes (welding, moving and testing parts) in a 5x5m² production cell. The robust, optical wireless transmission is based on spatial diversity; in other words, data is sent and received simultaneously by several LEDs and several photodiodes. The system can transmit data at more than 100 Mbit/s and five milliseconds latency.

Modern production technologies in the automobile industry must become more flexible in order to fulfil individual customer requirements.

Im Focus: Sharp images with flexible fibers

An international team of scientists has discovered a new way to transfer image information through multimodal fibers with almost no distortion - even if the fiber is bent. The results of the study, to which scientist from the Leibniz-Institute of Photonic Technology Jena (Leibniz IPHT) contributed, were published on 6thJune in the highly-cited journal Physical Review Letters.

Endoscopes allow doctors to see into a patient’s body like through a keyhole. Typically, the images are transmitted via a bundle of several hundreds of optical...

Im Focus: Photoexcited graphene puzzle solved

A boost for graphene-based light detectors

Light detection and control lies at the heart of many modern device applications, such as smartphone cameras. Using graphene as a light-sensitive material for...

Im Focus: Water is not the same as water

Water molecules exist in two different forms with almost identical physical properties. For the first time, researchers have succeeded in separating the two forms to show that they can exhibit different chemical reactivities. These results were reported by researchers from the University of Basel and their colleagues in Hamburg in the scientific journal Nature Communications.

From a chemical perspective, water is a molecule in which a single oxygen atom is linked to two hydrogen atoms. It is less well known that water exists in two...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

Munich conference on asteroid detection, tracking and defense

13.06.2018 | Event News

2nd International Baltic Earth Conference in Denmark: “The Baltic Sea region in Transition”

08.06.2018 | Event News

ISEKI_Food 2018: Conference with Holistic View of Food Production

05.06.2018 | Event News

 
Latest News

A sprinkle of platinum nanoparticles onto graphene makes brain probes more sensitive

15.06.2018 | Materials Sciences

100 % Organic Farming in Bhutan – a Realistic Target?

15.06.2018 | Ecology, The Environment and Conservation

Perovskite-silicon solar cell research collaboration hits 25.2% efficiency

15.06.2018 | Power and Electrical Engineering

VideoLinks
Science & Research
Overview of more VideoLinks >>>