{"id":6447,"date":"2013-10-22T09:00:44","date_gmt":"2013-10-22T14:00:44","guid":{"rendered":"https:\/\/www.insta-pro.com\/fr\/2013\/10\/22\/farmed-fish-are-what-they-eat-sort-of\/"},"modified":"2018-05-15T11:20:13","modified_gmt":"2018-05-15T16:20:13","slug":"farmed-fish-are-what-they-eat-sort-of","status":"publish","type":"post","link":"https:\/\/instapro.spinuhost.com\/fr\/blog\/nutrition-et-technologies\/farmed-fish-are-what-they-eat-sort-of\/","title":{"rendered":"Les poissons d\u2019\u00e9levage sont ce qu\u2019ils mangent&#8230; plus ou moins"},"content":{"rendered":"<p>La consommation de poisson <a href=\"http:\/\/www.who.int\/nutrition\/topics\/3_foodconsumption\/en\/index5.html\">conna\u00eet une certaine progression<\/a>, due au moins en partie aux <a href=\"http:\/\/www.cnn.com\/2007\/HEALTH\/07\/11\/pl.fish\/\">bienfaits qu\u2019elle apporte pour la sant\u00e9<\/a>.&#160; En particulier, <a href=\"http:\/\/umm.edu\/health\/medical\/altmed\/supplement\/omega3-fatty-acids\">de plus en plus de donn\u00e9es<\/a> laissent \u00e0 penser que ce sont les <a href=\"http:\/\/en.wikipedia.org\/wiki\/Omega-3_fatty_acids\">acides gras om\u00e9ga-3<\/a> de la chair du poisson qui sont \u00e0 l\u2019origine de ces bienfaits.<\/p>\n<p>Il se r\u00e9v\u00e8le donc int\u00e9ressant d\u2019\u00e9lever des poissons qui sont capables d\u2019apporter des acides gras om\u00e9ga-3 dans leur chair.<\/p>\n<p>J\u2019ai analys\u00e9 les donn\u00e9es de deux \u00e9tudes portant sur l\u2019alimentation du saumon atlantique d\u2019\u00e9levage (<a href=\"http:\/\/onlinelibrary.wiley.com\/doi\/10.1111\/j.1365-2095.2012.00958.x\/abstract\">ici<\/a> et <a href=\"http:\/\/jn.nutrition.org\/content\/132\/2\/222.short\">ici<\/a>). &#160;Les r\u00e9gimes alimentaires \u00e9taient pr\u00e9par\u00e9s pour apporter des quantit\u00e9s tr\u00e8s variables d\u2019<a href=\"http:\/\/en.wikipedia.org\/wiki\/Omega-6_fatty_acids\">acides gras om\u00e9ga-6<\/a> et om\u00e9ga-3 aux poissons, et on d\u00e9terminait ensuite les diff\u00e9rences concernant la teneur en acides gras de la chair du poisson.<\/p>\n<p>Il est utile de souligner que la quantit\u00e9 totale de mati\u00e8res grasses dans la chair de saumon \u00e9tait tr\u00e8s proche dans chaque \u00e9tude, quelles que soient les variations dans l\u2019alimentation des poissons, et donc les donn\u00e9es pr\u00e9sent\u00e9es ici repr\u00e9sentent les variations de composition des graisses.&#160; D\u2019autre part, la quantit\u00e9 totale de graisses dans les rations alimentaires exp\u00e9rimentales \u00e9tait pratiquement identique dans chacune des deux \u00e9tudes.<\/p>\n<p>Dans une certaine mesure, les donn\u00e9es ont r\u00e9v\u00e9l\u00e9 que les saumons d\u2019\u00e9levage sont ce qu\u2019ils mangent&#160;\u2013 voir figure 1.<\/p>\n<p style=\"text-align: center;\"><a href=\"https:\/\/www.insta-pro.com-content\/uploads\/2013\/10\/11.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-1337\" src=\"https:\/\/www.insta-pro.com-content\/uploads\/2013\/10\/11.jpg\" alt=\"1\" width=\"519\" height=\"351\" \/><\/a><\/p>\n<p style=\"text-align: center;\"><a href=\"https:\/\/www.insta-pro.com-content\/uploads\/2013\/10\/21.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-1338\" src=\"https:\/\/www.insta-pro.com-content\/uploads\/2013\/10\/21.jpg\" alt=\"2\" width=\"527\" height=\"323\" \/><\/a><\/p>\n<p><b>Figure 1. Les quantit\u00e9s d\u2019acides gras om\u00e9ga-3 et om\u00e9ga-6 dans la nourriture des poissons \u00e9tait \u00e9troitement li\u00e9e \u00e0 leurs niveaux respectifs dans la chair de saumon.&#160;&#160;<\/b><\/p>\n<p>En r\u00e9sum\u00e9, plus d\u2019acides gras om\u00e9ga-3 donn\u00e9s aux saumons entra\u00eenait plus d\u2019acides gras om\u00e9ga-3 dans leur chair, et on a constat\u00e9 le m\u00eame ph\u00e9nom\u00e8ne pour les acides gras om\u00e9ga-6. <b>&#160;&#160;<\/b><\/p>\n<p>Ce qui est peut-\u00eatre plus int\u00e9ressant, c\u2019est l\u2019effet des acides gras om\u00e9ga-6 dans la nourriture des poissons sur les niveaux d\u2019acides gras om\u00e9ga-3 dans la chair&#160;; l\u2019augmentation des teneurs en acides gras om\u00e9ga-6 dans la nourriture des saumons a-t-elle une incidence sur les teneurs en acides gras om\u00e9ga-3 de la chair de saumon&#160;?<\/p>\n<p style=\"text-align: center;\"><a href=\"https:\/\/www.insta-pro.com-content\/uploads\/2013\/10\/31.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-1339\" src=\"https:\/\/www.insta-pro.com-content\/uploads\/2013\/10\/31.jpg\" alt=\"3\" width=\"526\" height=\"332\" \/><\/a><\/p>\n<p style=\"text-align: center;\"><a href=\"https:\/\/www.insta-pro.com-content\/uploads\/2013\/10\/41.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-1340\" src=\"https:\/\/www.insta-pro.com-content\/uploads\/2013\/10\/41.jpg\" alt=\"4\" width=\"506\" height=\"318\" \/><\/a><\/p>\n<p><b>Figure 2. La quantit\u00e9 d\u2019acides gras om\u00e9ga-6, et le rapport acides gras om\u00e9ga-3\/acides gras om\u00e9ga-6, dans les r\u00e9gimes des saumons, ont eu des effets limit\u00e9s sur les niveaux d\u2019acides gras om\u00e9ga-3 dans la chair de saumon.<\/b><\/p>\n<p>Ce qui ressort, c\u2019est que les niveaux sup\u00e9rieurs d\u2019acides gras om\u00e9ga-6 dans la nourriture des poissons ont sans doute fait diminuer les niveaux d\u2019acides gras om\u00e9ga-3 dans la chair de saumon, mais seulement dans une certaine limite.&#160; On peut aussi interpr\u00e9ter les donn\u00e9es comme suit&#160;:<\/p>\n<ul>\n<li>Une multiplication par 8,3 des niveaux d\u2019acides gras om\u00e9ga-6 dans la nourriture du saumon n\u2019a divis\u00e9 les niveaux d\u2019acides gras om\u00e9ga-3 dans la chair que par 2,7 (voir figure 2, graphique du haut).<b><\/b><\/li>\n<li>Une modification du ratio om\u00e9ga-3\/om\u00e9ga-6 suivant un rapport de 21,6 dans la nourriture des saumons a entra\u00een\u00e9 une modification des niveaux d\u2019acides gras om\u00e9ga-3 dans la chair selon un rapport de 2,7 (voir figure 2, graphique du bas).<\/li>\n<\/ul>\n<p>Les nutritionnistes pour saumon ont donc une marge de man\u0153uvre lorsqu\u2019ils pr\u00e9parent les aliments, et peuvent tenir compte des co\u00fbts de tous les ingr\u00e9dients disponibles.&#160; Dans les deux \u00e9tudes sur lesquelles je me suis appuy\u00e9 ici, les aliments \u00e9taient formul\u00e9s pour contenir diff\u00e9rentes proportions d\u2019huiles de poisson, de palme, de soja, de colza, et d\u2019olive, et diff\u00e9rentes proportions de farine de poisson, pour obtenir les variations de teneur en acides gras des r\u00e9gimes alimentaires.&#160; Aussi, l\u2019une des \u00e9tudes que j\u2019ai utilis\u00e9e comme r\u00e9f\u00e9rence ici a cherch\u00e9 \u00e0 utiliser des quantit\u00e9s minimales de tourteau et d\u2019huile de poisson en vue d\u2019am\u00e9liorer la p\u00e9rennit\u00e9 de l\u2019\u00e9levage de poisson (le concept du <a href=\"http:\/\/iffo.net.769soon2b.co.uk\/downloads\/100.pdf\">\u00ab&#160;Fish in, Fish out&#160;\u00bb<\/a>). &#160;Ainsi, les \u00e9leveurs de saumons peuvent trouver un compromis entre une diminution des co\u00fbts d\u2019alimentation et le maintien des niveaux d\u2019acides gras om\u00e9ga-3, bons pour la sant\u00e9, dans la chair de saumon.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>La consommation de poisson conna\u00eet une certaine progression, due au moins en partie aux bienfaits qu\u2019elle apporte pour la sant\u00e9.&#160; En particulier, de plus en plus de donn\u00e9es laissent \u00e0 penser que ce sont les acides gras om\u00e9ga-3 de la chair du poisson qui sont \u00e0 l\u2019origine de ces bienfaits. Il se r\u00e9v\u00e8le donc int\u00e9ressant [&hellip;]<\/p>\n","protected":false},"author":13,"featured_media":11049,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[7181],"tags":[867,637,1468,1468,585,592],"class_list":{"0":"post-6447","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","6":"hentry","7":"category-nutrition-et-technologies","8":"tag-fish-feed-fr","9":"tag-formulation-de-lalimentation-animale","10":"tag-omega-3-fr","12":"tag-produits-enrichis-fr-3","13":"tag-transformation-pour-lalimentation-humaine-ou-animale-fr-2"},"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.2 (Yoast SEO v27.3) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Les poissons d\u2019\u00e9levage sont ce qu\u2019ils mangent... plus ou moins | Insta-Pro Intl.<\/title>\n<meta name=\"description\" content=\"La consommation de poisson conna\u00eet une certaine progression, due au moins en partie aux bienfaits qu\u2019elle apporte pour la sant\u00e9, gr\u00e2ce aux acides gras om\u00e9ga-3 contenus dans le poisson.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/instapro.spinuhost.com\/fr\/blog\/nutrition-et-technologies\/farmed-fish-are-what-they-eat-sort-of\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Les poissons d\u2019\u00e9levage sont ce qu\u2019ils mangent... plus ou moins\" \/>\n<meta property=\"og:description\" content=\"La consommation de poisson conna\u00eet une certaine progression, due au moins en partie aux bienfaits qu\u2019elle apporte pour la sant\u00e9, gr\u00e2ce aux acides gras om\u00e9ga-3 contenus dans le poisson.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/instapro.spinuhost.com\/fr\/blog\/nutrition-et-technologies\/farmed-fish-are-what-they-eat-sort-of\/\" \/>\n<meta property=\"og:site_name\" content=\"Insta-Pro\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/instaprointernational\/\" \/>\n<meta property=\"article:published_time\" content=\"2013-10-22T14:00:44+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2018-05-15T16:20:13+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.insta-pro.com\/wp-content\/uploads\/2015\/02\/fish-feed.png\" \/>\n\t<meta property=\"og:image:width\" content=\"920\" \/>\n\t<meta property=\"og:image:height\" content=\"320\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"Dave Albin\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@InstaProInt\" \/>\n<meta name=\"twitter:site\" content=\"@InstaProInt\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/instapro.spinuhost.com\\\/fr\\\/blog\\\/nutrition-et-technologies\\\/farmed-fish-are-what-they-eat-sort-of\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/instapro.spinuhost.com\\\/fr\\\/blog\\\/nutrition-et-technologies\\\/farmed-fish-are-what-they-eat-sort-of\\\/\"},\"author\":{\"name\":\"Dave Albin\",\"@id\":\"https:\\\/\\\/insta-pro.spinudev.com\\\/en\\\/#\\\/schema\\\/person\\\/1d4085c5c7c76d6bdf73987523b247f7\"},\"headline\":\"Les poissons d\u2019\u00e9levage sont ce qu\u2019ils mangent&#8230; 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