{"id":5973,"date":"2014-01-06T08:00:54","date_gmt":"2014-01-06T07:00:54","guid":{"rendered":"http:\/\/codexvirtualis.fr\/codex\/?p=5973"},"modified":"2013-12-13T22:00:29","modified_gmt":"2013-12-13T21:00:29","slug":"semaine-02-2014","status":"publish","type":"post","link":"https:\/\/codexvirtualis.fr\/codex\/semaine-02-2014","title":{"rendered":"Semaine 02-2014"},"content":{"rendered":"<h2>Une citation<\/h2>\n<p>\u00ab\u00a0Il faut tenir \u00e0 une r\u00e9solution parce qu&rsquo;elle est bonne et non parce qu&rsquo;on l&rsquo;a prise.\u00a0\u00bb<\/p>\n<p>F. La Rochefoucauld<\/p>\n<p> &nbsp; <\/p>\n<h2>Une image<\/h2>\n<figure style=\"width: 300px\" class=\"wp-caption alignnone\"><a rel=\"lightbox\" href=\"https:\/\/i0.wp.com\/www.codexvirtualis.fr\/documents\/images\/Trivia_arctica_01_05-WEB.JPG\" target=\"_blank\"><img data-recalc-dims=\"1\" decoding=\"async\" class=\" \" title=\"Grain de caf\u00e9\" src=\"https:\/\/i0.wp.com\/www.codexvirtualis.fr\/documents\/images\/Trivia_arctica_01_05-WEB.JPG?w=300\" alt=\"Grain de caf\u00e9\"  \/><\/a><figcaption class=\"wp-caption-text\">Grain de caf\u00e9 (Carantec, f\u00e9vrier 2005)<\/figcaption><\/figure>\n<p> &nbsp; <\/p>\n<p>Le Grain de caf\u00e9 (<em>Trivia arctica<\/em>) est un Mollusque Gast\u00e9ropode de la famille des Triviid\u00e9s.<\/p>\n<p>L&rsquo;<a href=\"\/codex\/glossaire\/glossaire-de-a-a-c#adulte\" target=\"_blank\">adulte<\/a> fr\u00e9quente les c\u00f4tes rocheuses, g\u00e9n\u00e9ralement jusqu&rsquo;\u00e0 une profondeur de 200 m, et affectionne particuli\u00e8rement les milieux dans lesquels les Ascidies dont il se nourrit sont pr\u00e9sentes.<\/p>\n<p> &nbsp; <\/p>\n<p>Le Grain de caf\u00e9 est ais\u00e9ment identifi\u00e9 \u00e0 la forme de sa coquille, qui rappelle celle d&rsquo;un grain de caf\u00e9.<br \/>\nBomb\u00e9e sur le dessus, elle est plate en dessous, et pr\u00e9sente une \u00e9troite ouverture longitudinale divisant sa face inf\u00e9rieure en deux parties in\u00e9gales. Les bords de cette fente sont repli\u00e9s vers l&rsquo;int\u00e9rieur de la coquille.<\/p>\n<p>De forme ovale, elle mesure 10 mm de long au maximum et arbore une couleur beige ou rose p\u00e2le luisante. Ventralement la couleur est plus claire, tendant vers le blanc.<br \/>\nElle porte des sillons transversaux remarquables.<\/p>\n<p>La <a href=\"\/codex\/glossaire\/glossaire-de-t-a-z#tete\" target=\"_blank\">t\u00eate<\/a>, le pied et le siphon que l&rsquo;animal peut d\u00e9ployer hors de la coquille via son ouverture sont de couleur orang\u00e9e.<br \/>\nLe manteau, repli du t\u00e9gument, est pour sa part translucide, teint\u00e9 de beige et fr\u00e9quemment macul\u00e9 de taches brunes. Il recouvre parfois la coquille, lorsqu&rsquo;il est en pleine extension. <\/p>\n<p> &nbsp; <\/p>\n<p>Le Grain de caf\u00e9 est un Gast\u00e9ropode carnivore : il consomme des Ascidies, organismes animaux vivant fix\u00e9s sur les rochers.<\/p>\n<p> &nbsp; <\/p>\n<p>La reproduction de cette esp\u00e8ce intervient principalement au printemps. <\/p>\n<p>Les sexes sont s\u00e9par\u00e9s, et \u00e0 la faveur d&rsquo;un accouplement, le m\u00e2le transf\u00e8re des spermatozo\u00efdes \u00e0 la femelle.<br \/>\nLa f\u00e9condation se d\u00e9roule dans la cavit\u00e9 d\u00e9limit\u00e9e par le manteau, appel\u00e9e cavit\u00e9 pall\u00e9ale.<\/p>\n<p>La femelle d\u00e9pose les <a href=\"\/codex\/glossaire\/glossaire-de-i-a-o#oeuf\" target=\"_blank\">\u0153ufs<\/a> qui en sont issus dans des Ascidies, au sein de capsules.<\/p>\n<p>Apr\u00e8s quelques semaines de <a href=\"\/codex\/glossaire\/glossaire-de-d-a-h#developpement-embryonnaire\" target=\"_blank\">d\u00e9veloppement embryonnaire<\/a>, l&rsquo;\u00e9closion lib\u00e8re des <a href=\"\/codex\/glossaire\/glossaire-de-i-a-o#larve\" target=\"_blank\">larves<\/a> qui m\u00e8nent une vie planctonique.<br \/>\nQuelques mois plus tard, elles descendent sur le fond, se transforment en <a href=\"\/codex\/glossaire\/glossaire-de-i-a-o#juvenile\" target=\"_blank\">juv\u00e9niles<\/a> et adoptent le mode de vie caract\u00e9ristique des adultes. <\/p>\n<p> &nbsp; <\/p>\n<p>Pour en savoir plus, consulter :<\/p>\n<p><span style=\"color: #999999;\">&bull; <\/span>le site <a href=\"http:\/\/doris.ffessm.fr\" target=\"_blank\">Doris<\/a> (Donn\u00e9es d&rsquo;observations pour la reconnaissance et l&rsquo;identification de la faune et de la flore subaquatiques &#8211; F\u00e9d\u00e9ration fran\u00e7aise d&rsquo;\u00e9tudes et de sports sous-marins &#8211; adresse : http:\/\/doris.ffessm.fr)<\/p>\n<p>et notamment<\/p>\n<p><span style=\"color: #999999;\">&bull; <\/span>la fiche <a href=\" http:\/\/doris.ffessm.fr\/fiche2.asp?fiche_numero=362\" target=\"_blank\"> \tLE GRANCH\u00c9 Philippe, DAMERVAL Marc,  in : DORIS, 8\/7\/2011 : Trivia arctica (Pulteney, 1799)<\/a> (adresse :  http:\/\/doris.ffessm.fr\/fiche2.asp?fiche_numero=362)<\/p>\n<p> &nbsp; <\/p>\n<hr \/>\n","protected":false},"excerpt":{"rendered":"<p>Une citation \u00ab\u00a0Il faut tenir \u00e0 une r\u00e9solution parce qu&rsquo;elle est bonne et non parce qu&rsquo;on l&rsquo;a prise.\u00a0\u00bb F. La Rochefoucauld &nbsp; Une image &nbsp; Le Grain de caf\u00e9 (Trivia arctica) est un Mollusque Gast\u00e9ropode de la famille des Triviid\u00e9s. L&rsquo;adulte fr\u00e9quente les c\u00f4tes rocheuses, g\u00e9n\u00e9ralement jusqu&rsquo;\u00e0 une profondeur de 200 m, et affectionne particuli\u00e8rement [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[1],"tags":[28,12,23],"class_list":["post-5973","post","type-post","status-publish","format-standard","hentry","category-a-la-une","tag-biologie","tag-mollusque","tag-observation"],"aioseo_notices":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/codexvirtualis.fr\/codex\/wp-json\/wp\/v2\/posts\/5973","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/codexvirtualis.fr\/codex\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/codexvirtualis.fr\/codex\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/codexvirtualis.fr\/codex\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/codexvirtualis.fr\/codex\/wp-json\/wp\/v2\/comments?post=5973"}],"version-history":[{"count":17,"href":"https:\/\/codexvirtualis.fr\/codex\/wp-json\/wp\/v2\/posts\/5973\/revisions"}],"predecessor-version":[{"id":6025,"href":"https:\/\/codexvirtualis.fr\/codex\/wp-json\/wp\/v2\/posts\/5973\/revisions\/6025"}],"wp:attachment":[{"href":"https:\/\/codexvirtualis.fr\/codex\/wp-json\/wp\/v2\/media?parent=5973"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/codexvirtualis.fr\/codex\/wp-json\/wp\/v2\/categories?post=5973"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/codexvirtualis.fr\/codex\/wp-json\/wp\/v2\/tags?post=5973"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}