Researchers at the University of Southampton have derived carbon and nitrogen stable isotopic isoscapes using jellyfish from different locations around the North Sea. These were applied to scallops and herring, enabling 75% of scallops origin to be confirmed within an error of 10 sq.km.  

It was also possible to assign location of migratory fish such as herring with the isoscapes, but with some reduced accuracy. The isotopic method compares favourably with other methods used to determine location of seafood in the North Sea. 

Read the full paper at: http://onlinelibrary.wiley.com/doi/10.1111/2041-210X.12651/full

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