{"id":1630,"date":"2014-05-12T14:31:31","date_gmt":"2014-05-12T14:31:31","guid":{"rendered":"http:\/\/www.123fakta.com\/da\/?p=1630"},"modified":"2026-03-19T10:38:28","modified_gmt":"2026-03-19T10:38:28","slug":"faits-sur-les-requins","status":"publish","type":"post","link":"https:\/\/www.123fakta.com\/fr\/facts-about-sharks","title":{"rendered":"Faits sur les requins"},"content":{"rendered":"<ol>\n<li><strong>L'odorat :<\/strong>\u00a0Les requins ont un odorat extr\u00eamement fin et peuvent sentir le sang \u00e0 une grande distance. La distance exacte peut aller de 400 m \u00e0 2 km, en fonction de l'esp\u00e8ce de requin et des conditions de l'eau. Les 2\/3 du cerveau du requin sont consacr\u00e9s \u00e0 l'odorat.<\/li>\n<li><strong>Naufrage :<\/strong> Si un requin cesse de nager, il coule au fond de l'eau. Certaines esp\u00e8ces de requins meurent s'ils ne nagent pas, car leur vie d\u00e9pend de l'\u00e9coulement constant de l'eau dans leurs branchies (ce qui ne se produit que lorsqu'ils sont propuls\u00e9s dans l'eau).<\/li>\n<li><strong>400 millions d'ann\u00e9es :<\/strong>\u00a0Les requins existent depuis 400 millions d'ann\u00e9es, sans grand changement, ce qui signifie qu'ils \u00e9taient l\u00e0 bien avant l'apparition de l'homme. <a href=\"https:\/\/www.123fakta.com\/fr\/faits-sur-les-dinosaures\/\">dinosaures<\/a> arriv\u00e9<\/li>\n<li><strong>Mangeurs d'ours polaires :<\/strong>\u00a0Le requin du Groenland (\u00e9galement appel\u00e9 \"merman\" ou \"Somniosus microcephalus\") se nourrit de <a href=\"https:\/\/www.123fakta.com\/fr\/faits-sur-les-ours-polaires\/\">ours polaires<\/a> et peuvent vivre jusqu'\u00e0 200 ans<\/li>\n<li><strong>Requins tigres :<\/strong>\u00a0D\u00e8s que les embryons de requins tigres d\u00e9veloppent des dents, ils attaquent leurs fr\u00e8res et s\u0153urs et se mangent les uns les autres (alors qu'ils sont encore dans l'estomac de leur m\u00e8re). Cela est n\u00e9cessaire pour que les embryons grandissent. Comme le requin-tigre a deux ut\u00e9rus, il ne reste que deux embryons \u00e0 la naissance<\/li>\n<li><strong>Acc\u00e9l\u00e9ration :<\/strong>\u00a0Le requin-taupe bleu peut acc\u00e9l\u00e9rer plus vite qu'une Porsche<\/li>\n<li><strong>Requins taureaux :<\/strong>\u00a0Le requin taureau peut vivre en eau sal\u00e9e comme en eau douce.<\/li>\n<li><strong>Les plus grands requins :<\/strong>\u00a0Les deux plus grands requins du monde, le requin-baleine et le requin-brugden, sont d'inoffensifs mangeurs de plancton.<\/li>\n<li><strong>Le plus petit requin :<\/strong>\u00a0Le plus petit requin du monde, le requin pygm\u00e9e, ne mesure que 15 cm de long \u00e0 l'\u00e2ge adulte.<\/li>\n<li><strong>Dents :<\/strong>\u00a0Le grand requin blanc peut perdre jusqu'\u00e0 1 000 dents en un an. En comparaison, il faut 7 ans \u00e0 l'homme pour perdre 20 dents. Il ne faut que 3 jours pour remplacer une dent tomb\u00e9e. Au cours de la vie d'un requin, jusqu'\u00e0 30 000 dents peuvent pousser dans ses m\u00e2choires.<\/li>\n<\/ol>\n<figure id=\"attachment_7530\" aria-describedby=\"caption-attachment-7530\" style=\"width: 790px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-7530\" src=\"https:\/\/www.123fakta.com\/wp-content\/uploads\/hajer-fakta-2.jpg\" alt=\"Fait : Les requins tuent beaucoup moins de personnes chaque ann\u00e9e qu&#039;on ne le pense.\" width=\"800\" height=\"600\" srcset=\"https:\/\/www.123fakta.com\/wp-content\/uploads\/hajer-fakta-2.jpg 800w, https:\/\/www.123fakta.com\/wp-content\/uploads\/hajer-fakta-2-300x225.jpg 300w, https:\/\/www.123fakta.com\/wp-content\/uploads\/hajer-fakta-2-768x576.jpg 768w, https:\/\/www.123fakta.com\/wp-content\/uploads\/hajer-fakta-2-16x12.jpg 16w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption id=\"caption-attachment-7530\" class=\"wp-caption-text\">Attribution : Allan Lee - Flickr.com<\/figcaption><\/figure>\n<p style=\"text-align: center;\"><em><strong>Fait : Les requins tuent 12 personnes par an - les humains tuent 11 417 requins par heure.<\/strong><\/em><\/p>\n<h2>Faits sur les requins du Groenland<\/h2>\n<ul>\n<li><strong>L'\u00e2ge<\/strong>: I\u00a0<a href=\"http:\/\/videnskab.dk\/naturvidenskab\/verdens-aeldste-hvirveldyr-groenlandshaj-blev-op-mod-512-aar-gammel\">une \u00e9tude de 2016<\/a> le plus vieux requin du Groenland vivant a \u00e9t\u00e9 estim\u00e9 entre 272 et 512 ans (l'\u00e2ge du requin du Groenland ne peut \u00eatre mesur\u00e9 avec pr\u00e9cision). La grande long\u00e9vit\u00e9 du requin du Groenland en fait probablement le vert\u00e9br\u00e9 qui vit le plus longtemps sur la plan\u00e8te. Avant la d\u00e9couverte de la longue dur\u00e9e de vie du requin du Groenland, c'est une baleine bor\u00e9ale \u00e2g\u00e9e de 211 ans qui d\u00e9tenait le record du vert\u00e9br\u00e9 le plus vieux du monde.<\/li>\n<li><strong>Maturit\u00e9 des sexes<\/strong>: L'\u00e2ge de la maturit\u00e9 : Les requins du Groenland atteignent la maturit\u00e9 sexuelle vers l'\u00e2ge de 100 ans (les femelles n'atteignent la maturit\u00e9 sexuelle qu'\u00e0 partir de 4 m\u00e8tres de long). Ils sont g\u00e9n\u00e9ralement sexuellement matures \u00e0 l'\u00e2ge de 150 ans environ.<\/li>\n<\/ul>\n<h2>Plus d'informations sur les requins<\/h2>\n<ul>\n<li><strong>Squelette :<\/strong>\u00a0Les requins n'ont pas d'os, leur squelette \u00e9tant enti\u00e8rement constitu\u00e9 de cartilage. Lorsque les requins meurent, leur corps est compl\u00e8tement dissous par l'eau, ne laissant que leurs dents<\/li>\n<li><strong>L'alimentation :<\/strong>\u00a0Un grand requin blanc adulte peut survivre pendant 3 mois sans manger.<\/li>\n<li><strong>Carnivores :<\/strong>\u00a0Il n'y a pas de requins herbivores<\/li>\n<li><strong>Dents ac\u00e9r\u00e9es :<\/strong>\u00a0Les dents du requin-tigre sont si ac\u00e9r\u00e9es qu'elles peuvent couper la carapace d'une tortue de mer.<\/li>\n<li><strong>Le cancer :<\/strong>\u00a0Des chercheurs \u00e9tudient le cartilage de requin pour trouver d'\u00e9ventuels rem\u00e8des contre le cancer, car les requins sont rarement atteints de cancer<\/li>\n<li><strong>Esp\u00e8ce :<\/strong>\u00a0Il existe au moins 500 esp\u00e8ces de requins dans le monde.<\/li>\n<li><strong>La surp\u00eache :<\/strong>\u00a0La surp\u00eache peut avoir de graves cons\u00e9quences pour les requins. Le requin-baleine, par exemple, ne peut pas se reproduire avant sa trenti\u00e8me ann\u00e9e et sa dur\u00e9e de vie totale est de 60 \u00e0 100 ans. Il ne peut donc pas se reproduire assez rapidement pour compenser le d\u00e9clin de la population caus\u00e9 par la p\u00eache<\/li>\n<li><strong>Phobie :<\/strong>\u00a0La \"gal\u00e9ophobie\" est la peur des requins. Le terme vient du grec \"galeos\", qui signifie \"chien de mer, petit requin\", et d\u00e9signait un type de requin aux caract\u00e9ristiques similaires \u00e0 celles d'une baleine.<\/li>\n<li><strong>L'\u00e2ge<\/strong>: Les requins vivent g\u00e9n\u00e9ralement 2 \u00e0 3 fois l'\u00e2ge auquel ils atteignent leur maturit\u00e9 sexuelle. Ainsi, si un requin atteint sa maturit\u00e9 sexuelle \u00e0 70 ans, il peut vivre entre 140 et 210 ans.<\/li>\n<li><strong>Croissance<\/strong>: Contrairement aux mammif\u00e8res, qui cessent de grandir \u00e0 un certain \u00e2ge, les requins - comme les autres esp\u00e8ces - ont une croissance plus rapide que les autres esp\u00e8ces. <a href=\"https:\/\/www.123fakta.com\/fr\/faits-sur-les-poissons\/\">poisson<\/a> - continuent \u00e0 se d\u00e9velopper tout au long de leur vie.<\/li>\n<\/ul>\n<figure id=\"attachment_7531\" aria-describedby=\"caption-attachment-7531\" style=\"width: 990px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-7531\" src=\"https:\/\/www.123fakta.com\/wp-content\/uploads\/den-store-hvide-haj-2.jpg\" alt=\"Fait : Le grand requin blanc peut survivre pendant 3 mois sans nourriture.\" width=\"1000\" height=\"667\" srcset=\"https:\/\/www.123fakta.com\/wp-content\/uploads\/den-store-hvide-haj-2.jpg 1000w, https:\/\/www.123fakta.com\/wp-content\/uploads\/den-store-hvide-haj-2-300x200.jpg 300w, https:\/\/www.123fakta.com\/wp-content\/uploads\/den-store-hvide-haj-2-768x512.jpg 768w, https:\/\/www.123fakta.com\/wp-content\/uploads\/den-store-hvide-haj-2-18x12.jpg 18w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><figcaption id=\"caption-attachment-7531\" class=\"wp-caption-text\">Attribution : Travelbag Ltd - Flickr.com<\/figcaption><\/figure>\n<p style=\"text-align: center;\"><em><strong>Fait : Le grand requin blanc peut survivre jusqu'\u00e0 3 mois sans nourriture.<\/strong><\/em><\/p>\n<h2>Faits sur les attaques de requins<\/h2>\n<ul>\n<li><strong>Morsure :<\/strong>\u00a0Dans les rares cas o\u00f9 les requins attaquent des humains, ils ne mordent g\u00e9n\u00e9ralement qu'une seule fois. Ils ne tiennent g\u00e9n\u00e9ralement leur victime que quelques secondes avant de se rendre compte que ce n'est pas un animal marin qu'ils ont attrap\u00e9<\/li>\n<li><strong>Requins contre humains :<\/strong>\u00a0Les requins tuent 12 personnes par an - les humains tuent 11 417 requins par heure<\/li>\n<li><strong>Morsures humaines :<\/strong>\u00a0Vous avez plus de chances d'\u00eatre mordu par un autre \u00eatre humain que par un requin.<\/li>\n<li><strong>Attaque c\u00f4ti\u00e8re :<\/strong>\u00a0La grande majorit\u00e9 des attaques de requins se produisent \u00e0 quelques centaines de m\u00e8tres de la c\u00f4te. Toutefois, cela est uniquement d\u00fb au fait que les humains nagent principalement pr\u00e8s du rivage<\/li>\n<li><strong>Mar\u00e9e basse :<\/strong>\u00a0Environ 2\/3 des attaques de requins se produisent en eaux peu profondes (moins de 1,8 m\u00e8tre de profondeur).<\/li>\n<li><strong>Probabilit\u00e9 :<\/strong>\u00a0Vous avez plus de chances de mourir d'une chute de noix de coco que d'une attaque de requin. Vous avez \u00e9galement plus de chances de mourir d'un coup de foudre ou d'une piq\u00fbre d'abeille que d'une attaque de requin.<\/li>\n<li><strong>Signes d'alerte :<\/strong>\u00a0Les signes suivants indiquent qu'un requin va attaquer : il arque le dos, abaisse ses nageoires pectorales et nage en zigzag.<\/li>\n<li><strong>Victimes masculines :<\/strong>\u00a0Bien qu'un nombre presque \u00e9gal d'hommes et de femmes nagent dans les oc\u00e9ans du monde, environ 90% de toutes les victimes de requins sont des hommes.<\/li>\n<li><strong>Peu d'esp\u00e8ces attaquent :<\/strong>\u00a0Seulement 3% de toutes les esp\u00e8ces de requins ont historiquement attaqu\u00e9 des humains.<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"<p>Sense of smell:\u00a0Sharks have an extremely keen sense of smell and can smell blood from a long distance. The exact distance can be between 400 m and 2 km, depending on the shark species and water conditions. 2\/3 of a shark&#8217;s brain is dedicated to its sense of smell Sinking: If a shark stops swimming, &#8230; <a title=\"Faits sur les requins\" class=\"read-more\" href=\"https:\/\/www.123fakta.com\/fr\/facts-about-sharks\" aria-label=\"En savoir plus sur Facts about sharks\">Lire plus<\/a><\/p>","protected":false},"author":1,"featured_media":7532,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"cybocfi_hide_featured_image":"","footnotes":""},"categories":[67,74],"tags":[120],"class_list":["post-1630","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-animals","category-aquatic-animals","tag-adsense"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Facts about sharks and shark attacks - 31 amazing facts<\/title>\n<meta name=\"description\" content=\"Fact: Sharks sink to the bottom if they stop swimming. Some species also die if they stand still. Learn more facts about sharks here.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.123fakta.com\/fr\/faits-sur-les-requins\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Facts about sharks and shark attacks - 31 amazing facts\" \/>\n<meta property=\"og:description\" content=\"Fact: Sharks sink to the bottom if they stop swimming. Some species also die if they stand still. 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Certaines esp\u00e8ces meurent \u00e9galement si elles restent immobiles. Pour en savoir plus sur les requins, cliquez ici.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.123fakta.com\/fr\/faits-sur-les-requins\/","og_locale":"fr_FR","og_type":"article","og_title":"Facts about sharks and shark attacks - 31 amazing facts","og_description":"Fact: Sharks sink to the bottom if they stop swimming. Some species also die if they stand still. 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