Biochemical composition of caviar as a tool to discriminate between aquaculture and wild origin
Identifieur interne : 000B45 ( Main/Merge ); précédent : 000B44; suivant : 000B46Biochemical composition of caviar as a tool to discriminate between aquaculture and wild origin
Auteurs : J. Gessner [Allemagne] ; S. Würtz [Allemagne] ; F. Kirschbaum [Allemagne] ; M. Wirth [Allemagne]Source :
- Journal of Applied Ichthyology [ 0175-8659 ] ; 2008-06.
Abstract
The over‐exploitation of sturgeons for caviar production has led to drastic decreases of the commercially harvested sturgeon stocks. As a consequence, all sturgeon species were world‐wide listed in Annex II or I of the CITES regulations. Since caviar trade needs to be controlled precise source (farmed vs wild) and species identification of the caviar are essential. Species discrimination is successfully performed by molecular genetic techniques. Whereas the origin of caviar either from wild stocks or from aquaculture cannot yet be differentiated using these techniques. As a consequence, the lack of an applicable technique for source identification complicates the control of black marketing of illegally produced sturgeon products. The determination of the chemical and biochemical composition of caviar, both of wild caught and farmed animals was attempted in this study to explore the potential of biochemical techniques for source identification. The results on size, protein and fat content, fatty acid (FA) composition of triglycerides (TG) and phospholipids (PL), as well as the concentrations of relevant heavy metals and chlorinated hydrocarbons from 38 samples of wild caught and 12 samples of farmed sturgeon were investigated. Significant differences with respect to the origin of the caviar were revealed in FA composition only. TG and PL contained more n‐3 FAs, especially eicosapentaenoic (20:5 n‐3) and docosahexaenoic acid (22:6 n‐3) than n‐6 FAs. Specific differences in the TG profile of wild caught and intensively farmed fish, depended on the feed sources utilized. It is therefore suggested to use specific FAs as additives to the formulated diets in order to provide the opportunity to ease the verification of the farm origin in traded sturgeon commodities.
Url:
DOI: 10.1111/j.1439-0426.2008.01092.x
Links toward previous steps (curation, corpus...)
- to stream Istex, to step Corpus: 000C88
- to stream Istex, to step Curation: 000C86
- to stream Istex, to step Checkpoint: 000545
Links to Exploration step
ISTEX:2ADAE6C0DFDD9B44A46031276934D07A91827121Le document en format XML
<record><TEI wicri:istexFullTextTei="biblStruct"><teiHeader><fileDesc><titleStmt><title xml:lang="en">Biochemical composition of caviar as a tool to discriminate between aquaculture and wild origin</title><author><name sortKey="Gessner, J" sort="Gessner, J" uniqKey="Gessner J" first="J." last="Gessner">J. Gessner</name></author><author><name sortKey="Wurtz, S" sort="Wurtz, S" uniqKey="Wurtz S" first="S." last="Würtz">S. Würtz</name></author><author><name sortKey="Kirschbaum, F" sort="Kirschbaum, F" uniqKey="Kirschbaum F" first="F." last="Kirschbaum">F. Kirschbaum</name></author><author><name sortKey="Wirth, M" sort="Wirth, M" uniqKey="Wirth M" first="M." last="Wirth">M. Wirth</name></author></titleStmt><publicationStmt><idno type="wicri:source">ISTEX</idno><idno type="RBID">ISTEX:2ADAE6C0DFDD9B44A46031276934D07A91827121</idno><date when="2008" year="2008">2008</date><idno type="doi">10.1111/j.1439-0426.2008.01092.x</idno><idno type="url">https://api.istex.fr/document/2ADAE6C0DFDD9B44A46031276934D07A91827121/fulltext/pdf</idno><idno type="wicri:Area/Istex/Corpus">000C88</idno><idno type="wicri:explorRef" wicri:stream="Istex" wicri:step="Corpus" wicri:corpus="ISTEX">000C88</idno><idno type="wicri:Area/Istex/Curation">000C86</idno><idno type="wicri:Area/Istex/Checkpoint">000545</idno><idno type="wicri:explorRef" wicri:stream="Istex" wicri:step="Checkpoint">000545</idno><idno type="wicri:doubleKey">0175-8659:2008:Gessner J:biochemical:composition:of</idno><idno type="wicri:Area/Main/Merge">000B45</idno></publicationStmt><sourceDesc><biblStruct><analytic><title level="a" type="main" xml:lang="en">Biochemical composition of caviar as a tool to discriminate between aquaculture and wild origin</title><author><name sortKey="Gessner, J" sort="Gessner, J" uniqKey="Gessner J" first="J." last="Gessner">J. Gessner</name><affiliation wicri:level="3"><country xml:lang="fr">Allemagne</country><wicri:regionArea>Leibniz‐Institute of Freshwater Ecology and Inland Fisheries, Berlin</wicri:regionArea><placeName><region type="land" nuts="3">Berlin</region><settlement type="city">Berlin</settlement></placeName></affiliation></author><author><name sortKey="Wurtz, S" sort="Wurtz, S" uniqKey="Wurtz S" first="S." last="Würtz">S. Würtz</name><affiliation wicri:level="3"><country xml:lang="fr">Allemagne</country><wicri:regionArea>Leibniz‐Institute of Freshwater Ecology and Inland Fisheries, Berlin</wicri:regionArea><placeName><region type="land" nuts="3">Berlin</region><settlement type="city">Berlin</settlement></placeName></affiliation></author><author><name sortKey="Kirschbaum, F" sort="Kirschbaum, F" uniqKey="Kirschbaum F" first="F." last="Kirschbaum">F. Kirschbaum</name><affiliation wicri:level="3"><country xml:lang="fr">Allemagne</country><wicri:regionArea>Leibniz‐Institute of Freshwater Ecology and Inland Fisheries, Berlin</wicri:regionArea><placeName><region type="land" nuts="3">Berlin</region><settlement type="city">Berlin</settlement></placeName></affiliation></author><author><name sortKey="Wirth, M" sort="Wirth, M" uniqKey="Wirth M" first="M." last="Wirth">M. Wirth</name><affiliation wicri:level="3"><country xml:lang="fr">Allemagne</country><wicri:regionArea>Leibniz‐Institute of Freshwater Ecology and Inland Fisheries, Berlin</wicri:regionArea><placeName><region type="land" nuts="3">Berlin</region><settlement type="city">Berlin</settlement></placeName></affiliation></author></analytic><monogr></monogr><series><title level="j">Journal of Applied Ichthyology</title><idno type="ISSN">0175-8659</idno><idno type="eISSN">1439-0426</idno><imprint><publisher>Blackwell Publishing Ltd</publisher><pubPlace>Oxford, UK</pubPlace><date type="published" when="2008-06">2008-06</date><biblScope unit="volume">24</biblScope><biblScope unit="supplement">s1</biblScope><biblScope unit="page" from="52">52</biblScope><biblScope unit="page" to="56">56</biblScope></imprint><idno type="ISSN">0175-8659</idno></series><idno type="istex">2ADAE6C0DFDD9B44A46031276934D07A91827121</idno><idno type="DOI">10.1111/j.1439-0426.2008.01092.x</idno><idno type="ArticleID">JAI1092</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0175-8659</idno></seriesStmt></fileDesc><profileDesc><textClass></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">The over‐exploitation of sturgeons for caviar production has led to drastic decreases of the commercially harvested sturgeon stocks. As a consequence, all sturgeon species were world‐wide listed in Annex II or I of the CITES regulations. Since caviar trade needs to be controlled precise source (farmed vs wild) and species identification of the caviar are essential. Species discrimination is successfully performed by molecular genetic techniques. Whereas the origin of caviar either from wild stocks or from aquaculture cannot yet be differentiated using these techniques. As a consequence, the lack of an applicable technique for source identification complicates the control of black marketing of illegally produced sturgeon products. The determination of the chemical and biochemical composition of caviar, both of wild caught and farmed animals was attempted in this study to explore the potential of biochemical techniques for source identification. The results on size, protein and fat content, fatty acid (FA) composition of triglycerides (TG) and phospholipids (PL), as well as the concentrations of relevant heavy metals and chlorinated hydrocarbons from 38 samples of wild caught and 12 samples of farmed sturgeon were investigated. Significant differences with respect to the origin of the caviar were revealed in FA composition only. TG and PL contained more n‐3 FAs, especially eicosapentaenoic (20:5 n‐3) and docosahexaenoic acid (22:6 n‐3) than n‐6 FAs. Specific differences in the TG profile of wild caught and intensively farmed fish, depended on the feed sources utilized. It is therefore suggested to use specific FAs as additives to the formulated diets in order to provide the opportunity to ease the verification of the farm origin in traded sturgeon commodities.</div></front></TEI></record>Pour manipuler ce document sous Unix (Dilib)
EXPLOR_STEP=$WICRI_ROOT/Wicri/Eau/explor/EsturgeonV1/Data/Main/Merge
HfdSelect -h $EXPLOR_STEP/biblio.hfd -nk 000B45 | SxmlIndent | more
Ou
HfdSelect -h $EXPLOR_AREA/Data/Main/Merge/biblio.hfd -nk 000B45 | SxmlIndent | more
Pour mettre un lien sur cette page dans le réseau Wicri
{{Explor lien
|wiki= Wicri/Eau
|area= EsturgeonV1
|flux= Main
|étape= Merge
|type= RBID
|clé= ISTEX:2ADAE6C0DFDD9B44A46031276934D07A91827121
|texte= Biochemical composition of caviar as a tool to discriminate between aquaculture and wild origin
}}
| This area was generated with Dilib version V0.6.27. |  |