Modification in Body Fat Content and Fatty Acid Profile of Wild Yellow Shortfin Eel, Anguilla australis, through Short‐term Fattening
Identifieur interne : 000F10 ( Istex/Corpus ); précédent : 000F09; suivant : 000F11Modification in Body Fat Content and Fatty Acid Profile of Wild Yellow Shortfin Eel, Anguilla australis, through Short‐term Fattening
Auteurs : Jorge A. Hirt-Chabbert ; Owen A. YoungSource :
- Journal of the World Aquaculture Society [ 0893-8849 ] ; 2012-08.
Abstract
Wild‐catch eels with low fat content are either not accepted at all or accepted as a lower‐quality and less valuable product in the global eel market. This study was undertaken with the goal of increasing the fat content of yellow shortfin eel, Anguilla australis (104 ± 11 g initial weight), captured in the wild and kept in captivity for a short period, as well as assessing their rate of growth. An 86‐d feeding trial was conducted indoors in a recirculation aquaculture system, at 25.5 ± 1.6 C. Two commercial extruded dry feeds were tested; one formulated for European eel and one not specifically intended for use on eels. Good values of specific growth rate (1.10 and 1.12%/d) and feed conversion ratio (1.01 and 1.10) were achieved with both tested feeds. At the end of the trial, eels achieved 20–22% total fat, starting from wild fish with 7% fat content. Fat quality of the fattened eel was appreciably superior (higher proportion of omega‐3 fatty acids) than the fat of eels captured in the wild. The results of this study are encouraging for the prospect of fattening yellow shortfin eels and obtaining a market‐oriented eel product.
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DOI: 10.1111/j.1749-7345.2012.00575.x
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Young</name><affiliation><mods:affiliation>School of Applied Sciences, AUT University, 34 Saint Paul Street, Auckland, New Zealand</mods:affiliation></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">ISTEX</idno><idno type="RBID">ISTEX:95681D14A9E2F19A701ABC3F6EE81890FD815866</idno><date when="2012" year="2012">2012</date><idno type="doi">10.1111/j.1749-7345.2012.00575.x</idno><idno type="url">https://api.istex.fr/document/95681D14A9E2F19A701ABC3F6EE81890FD815866/fulltext/pdf</idno><idno type="wicri:Area/Istex/Corpus">000F10</idno><idno type="wicri:explorRef" wicri:stream="Istex" wicri:step="Corpus" wicri:corpus="ISTEX">000F10</idno></publicationStmt><sourceDesc><biblStruct><analytic><title level="a" type="main" xml:lang="en">Modification in Body Fat Content and Fatty Acid Profile of Wild Yellow Shortfin Eel, Anguilla australis, through Short‐term Fattening</title><author><name sortKey="Hirt Habbert, Jorge A" sort="Hirt Habbert, Jorge A" uniqKey="Hirt Habbert J" first="Jorge A." last="Hirt-Chabbert">Jorge A. Hirt-Chabbert</name><affiliation><mods:affiliation>School of Applied Sciences, AUT University, 34 Saint Paul Street, Auckland, New Zealand</mods:affiliation></affiliation><affiliation><mods:affiliation>Corresponding author.</mods:affiliation></affiliation></author><author><name sortKey="Young, Owen A" sort="Young, Owen A" uniqKey="Young O" first="Owen A." last="Young">Owen A. Young</name><affiliation><mods:affiliation>School of Applied Sciences, AUT University, 34 Saint Paul Street, Auckland, New Zealand</mods:affiliation></affiliation></author></analytic><monogr></monogr><series><title level="j">Journal of the World Aquaculture Society</title><idno type="ISSN">0893-8849</idno><idno type="eISSN">1749-7345</idno><imprint><publisher>Blackwell Publishing Ltd</publisher><pubPlace>Oxford, UK</pubPlace><date type="published" when="2012-08">2012-08</date><biblScope unit="volume">43</biblScope><biblScope unit="issue">4</biblScope><biblScope unit="page" from="477">477</biblScope><biblScope unit="page" to="489">489</biblScope></imprint><idno type="ISSN">0893-8849</idno></series><idno type="istex">95681D14A9E2F19A701ABC3F6EE81890FD815866</idno><idno type="DOI">10.1111/j.1749-7345.2012.00575.x</idno><idno type="ArticleID">JWAS575</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0893-8849</idno></seriesStmt></fileDesc><profileDesc><textClass></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract">Wild‐catch eels with low fat content are either not accepted at all or accepted as a lower‐quality and less valuable product in the global eel market. This study was undertaken with the goal of increasing the fat content of yellow shortfin eel, Anguilla australis (104 ± 11 g initial weight), captured in the wild and kept in captivity for a short period, as well as assessing their rate of growth. An 86‐d feeding trial was conducted indoors in a recirculation aquaculture system, at 25.5 ± 1.6 C. Two commercial extruded dry feeds were tested; one formulated for European eel and one not specifically intended for use on eels. Good values of specific growth rate (1.10 and 1.12%/d) and feed conversion ratio (1.01 and 1.10) were achieved with both tested feeds. At the end of the trial, eels achieved 20–22% total fat, starting from wild fish with 7% fat content. Fat quality of the fattened eel was appreciably superior (higher proportion of omega‐3 fatty acids) than the fat of eels captured in the wild. 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This study was undertaken with the goal of increasing the fat content of yellow shortfin eel, <i>Anguilla australis</i> (104 ± 11 g initial weight), captured in the wild and kept in captivity for a short period, as well as assessing their rate of growth. An 86‐d feeding trial was conducted indoors in a recirculation aquaculture system, at 25.5 ± 1.6 C. Two commercial extruded dry feeds were tested; one formulated for European eel and one not specifically intended for use on eels. Good values of specific growth rate (1.10 and 1.12%/d) and feed conversion ratio (1.01 and 1.10) were achieved with both tested feeds. At the end of the trial, eels achieved 20–22% total fat, starting from wild fish with 7% fat content. Fat quality of the fattened eel was appreciably superior (higher proportion of omega‐3 fatty acids) than the fat of eels captured in the wild. 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This study was undertaken with the goal of increasing the fat content of yellow shortfin eel, Anguilla australis (104 ± 11 g initial weight), captured in the wild and kept in captivity for a short period, as well as assessing their rate of growth. An 86‐d feeding trial was conducted indoors in a recirculation aquaculture system, at 25.5 ± 1.6 C. Two commercial extruded dry feeds were tested; one formulated for European eel and one not specifically intended for use on eels. Good values of specific growth rate (1.10 and 1.12%/d) and feed conversion ratio (1.01 and 1.10) were achieved with both tested feeds. At the end of the trial, eels achieved 20–22% total fat, starting from wild fish with 7% fat content. Fat quality of the fattened eel was appreciably superior (higher proportion of omega‐3 fatty acids) than the fat of eels captured in the wild. 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