Document Detail


Discriminating farmed gilthead sea bream Sparus aurata and European sea bass Dicentrarchus labrax from wild stocks through scales and otoliths.
MedLine Citation:
PMID:  22551175     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
The study of mass and standard length (L(S) ) relationships showed that farmed individuals had higher values than wild fishes for both gilthead sea bream Sparus aurata and European sea bass Dicentrarchus labrax. Such differences were more pronounced in larger individuals than smaller ones and were more noticeable in S. aurata than in D. labrax. Additionally, differences in external characteristics of scales were detected between origins. A high proportion of farmed S. aurata had a regenerated nucleus (98%) and scale malformations (73%), and there were no annual rings in the farmed D. labrax (100%). Variation in otolith morphology was examined through shape descriptors such as area, perimeter, circularity, roundness, mass, height and length relationship and elliptic Fourier descriptors (EFDs). Important differences were found within geographical origins according to each shape descriptor separately, but no clear patterns distinguished wild and farmed fish. Discriminant analysis with either all shape descriptors together or EFDs was able to classify with high accuracy both S. aurata (89·5-95·7%) and D. labrax (93·2-95·2%) according to their origin. Hence, this study suggests the use of scale characteristics as the easiest and quickest way to distinguish farmed or escaped fishes, and secondly, the usefulness of EFDs or shape descriptors to improve such separation.
Authors:
P Arechavala-Lopez; P Sanchez-Jerez; J T Bayle-Sempere; D G Sfakianakis; S Somarakis
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Publication Detail:
Type:  Journal Article     Date:  2012-03-09
Journal Detail:
Title:  Journal of fish biology     Volume:  80     ISSN:  1095-8649     ISO Abbreviation:  J. Fish Biol.     Publication Date:  2012 May 
Date Detail:
Created Date:  2012-05-03     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0214055     Medline TA:  J Fish Biol     Country:  England    
Other Details:
Languages:  eng     Pagination:  2159-75     Citation Subset:  IM    
Copyright Information:
© 2012 The Authors. Journal of Fish Biology © 2012 The Fisheries Society of the British Isles.
Affiliation:
Department of Marine Sciences and Applied Biology, University of Alicante, P. O. Box 99, E-03080 Alicante, Spain Biology Department, University of Crete, Voutes University Campus, 70013 Iraklion, Crete, Greece Hellenic Centre for Marine Research, Institute of Marine Biological Resources, P. O. Box 2214, 71003 Iraklion, Crete, Greece.
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