{"id":220880,"date":"2018-04-02T17:56:58","date_gmt":"2018-04-02T15:56:58","guid":{"rendered":"https:\/\/insektenliebe.com\/haltungsberichte\/elever-des-drosophila-melanogaster\/"},"modified":"2026-07-20T11:43:12","modified_gmt":"2026-07-20T09:43:12","slug":"elever-des-drosophila-melanogaster","status":"publish","type":"report","link":"https:\/\/insektenliebe.com\/fr\/haltungsberichte\/elever-des-drosophila-melanogaster\/","title":{"rendered":"\u00c9lever des *Drosophila melanogaster*"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">G\u00e9n\u00e9ralit\u00e9s :<\/h2>\n\n<p class=\"wp-block-paragraph\">La *Drosophila melanogaster*, \u00e9galement appel\u00e9e mouche du vinaigre, mouche des fruits ou mouche \u00e0 ventre noir, est d\u00e9sormais incontournable dans le domaine de la terrariophilie. La forme \u00e0 ailes atrophi\u00e9es a d\u2019ailleurs depuis longtemps supplant\u00e9 la forme sauvage capable de voler. Les avantages de la forme d&rsquo;\u00e9levage incapable de voler sont \u00e9vidents. La manipulation des animaux s&rsquo;en trouve consid\u00e9rablement facilit\u00e9e ; en contrepartie, cette forme n&rsquo;est plus aussi fertile que sa forme sauvage. Les Drosophila melanogaster sont tr\u00e8s petites. Elles mesurent entre 2 mm et 4 mm de long. Selon l\u2019esp\u00e8ce, elles sont noires, jaune-brun ou mouchet\u00e9es de toutes les nuances de brun, et poss\u00e8dent des yeux rouge vif. D\u00e8s le lendemain de l\u2019accouplement, les femelles pondent leurs \u0153ufs dans des fruits en fermentation ou en d\u00e9composition \u2013 environ 400 au total. Apr\u00e8s la nymphose, il faut au maximum onze jours pour que les premiers descendants \u00e9closent. Ces mouches ont une esp\u00e9rance de vie de 30 \u00e0 40 jours. En raison de la bri\u00e8vet\u00e9 de leur cycle de vie, elles constituent des animaux de laboratoire id\u00e9aux. Il s\u2019agit de l\u2019animal de laboratoire le plus utilis\u00e9 au monde. Ainsi, ce dipt\u00e8re est d\u00e9sormais l\u2019une des esp\u00e8ces les plus \u00e9tudi\u00e9es au monde et est devenu incontournable dans les laboratoires de g\u00e9n\u00e9tique.           <\/p>\n\n<h2 class=\"wp-block-heading\">\u00c9levage :<\/h2>\n\n<p class=\"wp-block-paragraph\">L&rsquo;\u00e9levage de ces animaux est tr\u00e8s simple et, compar\u00e9 \u00e0 celui d&rsquo;autres animaux, tr\u00e8s peu co\u00fbteux. Pour l&rsquo;\u00e9levage, j&rsquo;utilise des r\u00e9cipients en verre lavables ou des r\u00e9cipients en plastique d&rsquo;une contenance de 500 \u00e0 1 000 ml. J&rsquo;y verse le substrat d&rsquo;\u00e9levage sur une hauteur d&rsquo;environ 3 cm. Comme surface de marche, on dispose sur le substrat de la laine de bois, des cartons \u00e0 \u0153ufs, du papier froiss\u00e9 ou des bandes de papier issues d\u2019une d\u00e9chiqueteuse. En r\u00e8gle g\u00e9n\u00e9rale, je peuple les nouvelles bo\u00eetes d\u2019\u00e9levage avec 20 \u00e0 40 mouches, ce qui permet une colonisation rapide par les larves. Je ne chauffe pas sp\u00e9cialement l\u2019\u00e9levage de mouches \u00e0 fruits, mais je le maintiens \u00e0 temp\u00e9rature ambiante normale.     <\/p>\n\n<div class=\"wp-block-group has-global-padding is-layout-constrained wp-block-group-is-layout-constrained\">\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-c8b335a5 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-table is-style-stripes\"><table class=\"has-fixed-layout\"><thead><tr><th class=\"has-text-align-center\" data-align=\"center\">Temp\u00e9rature<\/th><th class=\"has-text-align-center\" data-align=\"center\">Dur\u00e9e de d\u00e9veloppement<\/th><\/tr><\/thead><tbody><tr><td class=\"has-text-align-center\" data-align=\"center\">+10 \u00b0C<\/td><td class=\"has-text-align-center\" data-align=\"center\">aucune \u00e9volution<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">+15 \u00b0C<\/td><td class=\"has-text-align-center\" data-align=\"center\">28 jours<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">+18 \u00b0C<\/td><td class=\"has-text-align-center\" data-align=\"center\">20 jours<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">+21 \u00b0C<\/td><td class=\"has-text-align-center\" data-align=\"center\">16 jours<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">+25 \u00b0C<\/td><td class=\"has-text-align-center\" data-align=\"center\">10 \u00e0 11 jours<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">+30 \u00b0C<\/td><td class=\"has-text-align-center\" data-align=\"center\">8 jours<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">+35 \u00b0C<\/td><td class=\"has-text-align-center\" data-align=\"center\">aucune \u00e9volution<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"padding-top:0;padding-bottom:0\">\n<h3 class=\"wp-block-heading\" style=\"padding-top:6px;padding-bottom:6px\">Dur\u00e9e des diff\u00e9rents stades de d\u00e9veloppement \u00e0 25 \u00b0C<\/h3>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table class=\"has-fixed-layout\"><tbody><tr><td>D\u00e9veloppement embryonnaire<\/td><td>21 heures<\/td><\/tr><tr><td>1. Stade larvaire<\/td><td>22 heures<\/td><\/tr><tr><td>2. Stade larvaire<\/td><td>21 heures<\/td><\/tr><tr><td>3. Stade larvaire<\/td><td>44 heures<\/td><\/tr><tr><td>L&rsquo;heure des marionnettes<\/td><td>90 heures<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n<\/div>\n<\/div>\n\n<p class=\"wp-block-paragraph\">Il convient donc de conserver les couv\u00e9es dans un endroit un peu plus chaud et de placer les r\u00e9cipients contenant les animaux d\u00e9j\u00e0 \u00e9clos dans un endroit un peu plus frais afin de prolonger leur dur\u00e9e de vie. C&rsquo;est peu apr\u00e8s la mise en place des cultures que l&rsquo;on observe le mieux la ponte, lorsque les larves ne viennent pas encore perturber l&rsquo;observation. Les \u0153ufs sont de pr\u00e9f\u00e9rence pondus \u00e0 la surface du milieu de culture. La dur\u00e9e de d\u00e9veloppement d\u00e9pend de la temp\u00e9rature.   <\/p>\n\n<p class=\"wp-block-paragraph\">Au cours de leur d\u00e9veloppement larvaire, les animaux muent deux fois. Leur longueur augmente alors et atteint 4 \u00e0 5 mm au troisi\u00e8me stade. Les larves s&rsquo;enfouissent dans le substrat. Pour se m\u00e9tamorphoser, elles quittent g\u00e9n\u00e9ralement le substrat et remontent le long de la paroi des r\u00e9cipients d&rsquo;\u00e9levage.  <\/p>\n\n<div class=\"wp-block-group has-border-color has-custom-weissgrau-background-color has-background has-global-padding is-layout-constrained wp-container-core-group-is-layout-ca1e0ab3 wp-block-group-is-layout-constrained\" style=\"border-color:#d2e9aa;border-width:1px;border-radius:5px;padding-top:0;padding-right:0;padding-bottom:0;padding-left:0\">\n<div data-block-name=\"woocommerce\/single-product\" data-product-id=\"223572\" data-wp-context=\"woocommerce\/products::{&quot;productId&quot;:223572,&quot;variationId&quot;:null}\" data-wp-interactive=\"woocommerce\/single-product\" class=\"wp-block-woocommerce-single-product woocommerce\">\n<div class=\"wp-block-columns are-vertically-aligned-center is-layout-flex wp-container-core-columns-is-layout-566645b4 wp-block-columns-is-layout-flex\" style=\"margin-top:0;margin-bottom:0;padding-top:0;padding-right:0;padding-bottom:0;padding-left:0\">\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\" style=\"padding-top:0;padding-bottom:0;flex-basis:33.3%\"><div data-block-name=\"woocommerce\/product-image\" data-height=\"\" data-image-sizing=\"thumbnail\" data-is-descendent-of-single-product-block=\"true\" data-show-sale-badge=\"false\" data-width=\"100%\" class=\"wc-block-components-product-image wc-block-grid__product-image wc-block-components-product-image--aspect-ratio-auto wp-block-woocommerce-product-image\"><a href=\"https:\/\/insektenliebe.com\/fr\/shop\/produkt\/petite-mouche-des-fruits-fourmi\/\" style=\"\" data-wp-on--click=\"woocommerce\/product-collection::actions.viewProduct\"><img decoding=\"async\" width=\"300\" height=\"300\" src=\"https:\/\/insektenliebe.com\/wp-content\/uploads\/2022\/05\/Kleine-Fruchtfliege-22Ameise22-300x300.jpg\" class=\"attachment-woocommerce_thumbnail size-woocommerce_thumbnail\" alt=\"Petite mouche des fruits \u00ab fourmi \u00bb\" data-testid=\"product-image\" data-image-id=\"223574\" style=\"width:100%;object-fit:cover;\" loading=\"lazy\" srcset=\"https:\/\/insektenliebe.com\/wp-content\/uploads\/2022\/05\/Kleine-Fruchtfliege-22Ameise22-300x300.jpg 300w, https:\/\/insektenliebe.com\/wp-content\/uploads\/2022\/05\/Kleine-Fruchtfliege-22Ameise22-150x150.jpg 150w, https:\/\/insektenliebe.com\/wp-content\/uploads\/2022\/05\/Kleine-Fruchtfliege-22Ameise22-768x768.jpg 768w, https:\/\/insektenliebe.com\/wp-content\/uploads\/2022\/05\/Kleine-Fruchtfliege-22Ameise22-600x600.jpg 600w, https:\/\/insektenliebe.com\/wp-content\/uploads\/2022\/05\/Kleine-Fruchtfliege-22Ameise22-100x100.jpg 100w, https:\/\/insektenliebe.com\/wp-content\/uploads\/2022\/05\/Kleine-Fruchtfliege-22Ameise22.jpg 820w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><div class=\"wc-block-components-product-image__inner-container\"><\/div><\/a><\/div><\/div>\n\n\n\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\" style=\"padding-top:var(--wp--preset--spacing--30);padding-right:var(--wp--preset--spacing--30);padding-bottom:0;padding-left:var(--wp--preset--spacing--30)\"><h2 class=\"wp-block-post-title has-x-large-font-size\"><a href=\"https:\/\/insektenliebe.com\/fr\/shop\/produkt\/petite-mouche-des-fruits-fourmi\/\" target=\"_self\" >Petite mouche des fruits \u00ab fourmi \u00bb<\/a><\/h2>\n\n<div data-block-name=\"woocommerce\/product-price\" data-font-size=\"large\" data-is-descendent-of-single-product-block=\"true\" data-style=\"{&quot;typography&quot;:{&quot;fontStyle&quot;:&quot;normal&quot;,&quot;fontWeight&quot;:&quot;700&quot;}}\" style=\"font-style:normal;font-weight:700;font-style: normal;font-weight: 700\" class=\"has-font-size has-large-font-size wp-block-woocommerce-product-price\" ><div class=\"wc-block-components-product-price wc-block-grid__product-price\" >\n\t\t\t\t\t<span class=\"woocommerce-Price-amount amount\"><bdi>3,99&nbsp;<span class=\"woocommerce-Price-currencySymbol\" translate=\"no\">&euro;<\/span><\/bdi><\/span> <small class=\"woocommerce-price-suffix\">TVA comprise, hors frais de port   <\/small>\n\t\t\t\t<\/div><\/div>\n\n<div data-block-name=\"woocommerce\/product-summary\" data-font-size=\"medium\" data-is-descendent-of-single-product-block=\"true\" data-show-description-if-empty=\"true\" data-summary-length=\"30\" class=\"wp-block-woocommerce-product-summary\"><div class=\"wc-block-components-product-summary has-font-size has-medium-font-size\" style=\"\">\n\t\t\t\t<p>Id\u00e9al pour l&rsquo;\u00e9levage des jeunes animaux La petite mouche des fruits \u00ab Fourmi \u00bb (Drosophila melanogaster) est une souche d&rsquo;\u00e9levage incapable de voler, qui convient parfaitement comme proie pour une\u2026<\/p>\n\n\t\t\t<\/div><\/div>\n\n<div data-block-name=\"woocommerce\/add-to-cart-form\" data-quantity-selector-style=\"stepper\" class=\"wp-block-add-to-cart-form wc-block-add-to-cart-form wc-block-add-to-cart-form--stepper wp-block-woocommerce-add-to-cart-form\" data-wp-interactive=\"woocommerce\/add-to-cart-form\">\n\t\n\t<form class=\"cart\" action=\"https:\/\/insektenliebe.com\/fr\/shop\/produkt\/petite-mouche-des-fruits-fourmi\/\" method=\"post\" enctype='multipart\/form-data'>\n\t\t<p class=\"sale-date\" aria-live=\"polite\" style=\"font-weight: bold; color: var(--wp--preset--color--accent-5); margin-bottom: 0.5em;\"><\/p>\n\t\t<div class=\"quantity wc-block-components-quantity-selector\">\n\t\t<label class=\"screen-reader-text\" for=\"quantity_6a5fee3c0bc8a\">quantit\u00e9 de Petite mouche des fruits \u00ab fourmi \u00bb<\/label>\n\t<input\n\t\ttype=\"number\"\n\t\t\t\tid=\"quantity_6a5fee3c0bc8a\"\n\t\tclass=\"input-text qty text wc-block-components-quantity-selector__input\"\n\t\tname=\"quantity\"\n\t\tvalue=\"1\"\n\t\taria-label=\"Quantit\u00e9 de produits\"\n\t\t\t\tmin=\"1\"\n\t\t\t\t\t\t\tstep=\"1\"\n\t\t\tplaceholder=\"\"\n\t\t\tinputmode=\"numeric\"\n\t\t\tautocomplete=\"off\"\n\t\t\t\/><button aria-label=\"R\u00e9duire la quantit\u00e9 de Petite mouche des fruits \u00ab fourmi \u00bb\" type=\"button\" data-wp-on--click=\"actions.decreaseQuantity\" class=\"wc-block-components-quantity-selector__button wc-block-components-quantity-selector__button--minus\">\u2212<\/button><button aria-label=\"Augmenter la quantit\u00e9 de Petite mouche des fruits \u00ab fourmi \u00bb\" type=\"button\" data-wp-on--click=\"actions.increaseQuantity\" class=\"wc-block-components-quantity-selector__button wc-block-components-quantity-selector__button--plus\">+<\/button>\n\t<\/div>\n\n\t\t<button type=\"submit\" name=\"add-to-cart\" value=\"223572\" class=\"single_add_to_cart_button button alt wp-element-button\">Ajouter au panier<\/button>\n\n\t\t\t<\/form>\n\n\t\n<\/div><\/div>\n<\/div>\n<\/div>\n<\/div>\n\n<h2 class=\"wp-block-heading\">Milieu de culture :<\/h2>\n\n<p class=\"wp-block-paragraph\">Les larves de drosophile se nourrissent de levures. Le milieu de culture doit \u00eatre con\u00e7u de mani\u00e8re \u00e0 offrir des conditions de croissance favorables aux levures.  Il doit \u00eatre suffisamment compact pour qu&rsquo;aucun liquide ne s&rsquo;\u00e9coule lorsque l&rsquo;on retourne le r\u00e9cipient. Les larves doivent toutefois pouvoir s&rsquo;enfouir dans le substrat. <\/p>\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-c8b335a5 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<h3 class=\"wp-block-heading\">Ingr\u00e9dients n\u00e9cessaires pour un bac d&rsquo;\u00e9levage en \u00e9t\u00e9 :<\/h3>\n\n\n\n<ul class=\"wp-block-list has-medium-font-size\">\n<li><strong>1 cube de levure de boulangerie (1 sachet de levure s\u00e8che)<\/strong><\/li>\n\n\n\n<li><strong>2 cuill\u00e8res \u00e0 caf\u00e9 de sucre<\/strong><\/li>\n\n\n\n<li><strong>40 g de flocons d&rsquo;avoine (3 cuill\u00e8res \u00e0 caf\u00e9 bien remplies)<\/strong><\/li>\n<\/ul>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<h3 class=\"wp-block-heading\">Ingr\u00e9dients n\u00e9cessaires pour un bac d&rsquo;\u00e9levage en hiver :<\/h3>\n\n\n\n<ul class=\"wp-block-list has-medium-font-size\">\n<li><strong>1 cube de levure de boulangerie (1 sachet de levure s\u00e8che)<\/strong><\/li>\n\n\n\n<li><strong>1 cuill\u00e8re \u00e0 soupe de sucre<\/strong><\/li>\n\n\n\n<li><strong>135 ml de vinaigre (8 cuill\u00e8res \u00e0 soupe)<\/strong><\/li>\n\n\n\n<li><strong>1 sachet de pur\u00e9e de pommes de terre<\/strong><\/li>\n\n\n\n<li><strong>Eau (la moiti\u00e9 de la quantit\u00e9 de liquide indiqu\u00e9e sur l&#8217;emballage)<\/strong><\/li>\n<\/ul>\n<\/div>\n<\/div>\n\n<p class=\"wp-block-paragraph\">Il n&rsquo;est pas n\u00e9cessaire d&rsquo;utiliser un antifongique tel que la nipagine, car la teneur en vinaigre est tr\u00e8s \u00e9lev\u00e9e. Vous pouvez \u00e9galement ne pas ajouter de levure, car les pattes des mouches d&rsquo;\u00e9levage contiennent des cellules de levure. Cela ralentit toutefois consid\u00e9rablement l&rsquo;\u00e9levage. En raison de la pr\u00e9sence de levure, il faut bien comprendre qu\u2019un \u00e9levage totalement inodore n\u2019est pas possible. Au d\u00e9but, l\u2019odeur de vinaigre pr\u00e9domine. Plus l\u2019\u00e9levage dure, plus l\u2019odeur du substrat devient d\u00e9sagr\u00e9able.     <\/p>\n\n<p class=\"wp-block-paragraph\">Les acariens constituent le principal probl\u00e8me dans l&rsquo;\u00e9levage de la drosophile. C&rsquo;est pourquoi je vous recommande, lors de la mise en place des nouveaux r\u00e9cipients d&rsquo;\u00e9levage, d&rsquo;y introduire le plus grand nombre possible d&rsquo;animaux. Cela permet d&rsquo;augmenter le nombre de larves et, gr\u00e2ce \u00e0 leur forte agitation dans la bouillie d&rsquo;\u00e9levage, de r\u00e9duire la prolif\u00e9ration des acariens. De plus, vous pouvez placer les bo\u00eetes d\u2019\u00e9levage en permanence dans un bain-marie. Cela emp\u00eache, d\u2019une part, les acariens de se d\u00e9placer d\u2019un r\u00e9cipient \u00e0 l\u2019autre et, d\u2019autre part, la dispersion des mouches \u00e0 fruits \u00e9closes dans tout l\u2019appartement.    <\/p>\n\n<h2 class=\"wp-block-heading\">Nourrir les drosophiles :<\/h2>\n\n<p class=\"wp-block-paragraph\">Bien s\u00fbr, vous pouvez aller fouiller dans la garde-robe de votre femme ou de votre petite amie pour \u00ab emprunter \u00bb une paire de collants. C&rsquo;est ainsi que beaucoup font le lien entre le bocal d&rsquo;\u00e9levage et l&rsquo;insectarium. Mais en g\u00e9n\u00e9ral, certains s\u2019\u00e9chappent quand m\u00eame, et les collants reviennent bien trop cher \u00e0 la longue, surtout si vous tombez sur le mauvais mod\u00e8le. Vous pouvez tr\u00e8s facilement \u00e9viter les d\u00e9sagr\u00e9ments qui en d\u00e9coulent avec le sexe oppos\u00e9 en pla\u00e7ant simplement les gobelets d\u2019\u00e9levage quelques minutes au r\u00e9frig\u00e9rateur. Vous pouvez ensuite ouvrir la bo\u00eete en toute tranquillit\u00e9, en faire sortir les insectes et m\u00eame les saupoudrer d\u2019un compl\u00e9ment vitaminique (Korvimin ZVT). Les mouches \u00e0 fruits se trouvent alors bri\u00e8vement dans un \u00e9tat de torpeur due au froid qui ne leur cause aucun dommage, ni \u00e0 elles, ni aux \u0153ufs, ni aux larves.     <\/p>\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-30de70b0 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"\u274cFruchtfliegen Zuchtansatz | Winter-Rezept\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/J-ubksFfo9g?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"\u274cDrosophila Zuchtansatz- einfaches Rezept |  Culturing Fruit Flies\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/EKBQfxob8E8?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n<\/div>\n<\/div>\n","protected":false},"author":1,"featured_media":220427,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false},"tags":[],"animal-tag":[],"animal":[4065],"class_list":["post-220880","report","type-report","status-publish","has-post-thumbnail","hentry","animal-animaux-destines-a-lalimentation"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v28.0 (Yoast SEO v28.0) - 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