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Traceability and discrimination among differently farmed fish : a case study on Australian murray cod

journal contribution
posted on 2009-01-14, 00:00 authored by Giovanni Turchini, Gerry QuinnGerry Quinn, Paul Jones, Giorgio Palmeri, G Gooley
The development of traceability methods to distinguish between farmed and wild-caught fish and seafood is becoming increasingly important. However, very little is known about how to distinguish fish originating from different farms. The present study addresses this issue by attempting to discriminate among intensively farmed freshwater Murray cod originating from different farms (indoor recirculating, outdoor floating cage, and flow through systems) in different geographical areas, using a combination of morphological, chemical, and isotopic analyses. The results show that stable isotopes are the most informative variables. In particular, δ13C and/or δ15N clearly linked fish to a specific commercial diet, while δ18O linked fish to a specific water source. Thus, the combination of these isotopes can distinguish among fish originating from different farms. On the contrary, fatty acid and tissue proximate compositions and morphological parameters, which are useful in distinguishing between farmed and wild fish, are less informative in discriminating among fish originating from different farms.

History

Journal

Journal of agricultural and food chemistry

Volume

57

Issue

1

Pagination

274 - 281

Publisher

American Chemical Society

Location

Columbus, Oh.

ISSN

0021-8561

eISSN

1520-5118

Language

eng

Publication classification

C1 Refereed article in a scholarly journal

Copyright notice

2009, American Chemical Society