{"id":6050,"date":"2014-01-20T08:00:52","date_gmt":"2014-01-20T07:00:52","guid":{"rendered":"http:\/\/codexvirtualis.fr\/codex\/?p=6050"},"modified":"2014-01-09T22:27:21","modified_gmt":"2014-01-09T21:27:21","slug":"semaine-04-2014","status":"publish","type":"post","link":"https:\/\/codexvirtualis.fr\/codex\/semaine-04-2014","title":{"rendered":"Semaine 04-2014"},"content":{"rendered":"<h2>Une citation<\/h2>\n<p>\u00ab\u00a0La vie est un d\u00e9fi \u00e0 relever, un bonheur \u00e0 m\u00e9riter, une aventure \u00e0 tenter.\u00a0\u00bb<\/p>\n<p>M\u00e8re Teresa<\/p>\n<p> &nbsp; <\/p>\n<h2>Une image<\/h2>\n<figure style=\"width: 300px\" class=\"wp-caption alignnone\"><a rel=\"lightbox\" href=\"\/documents\/images\/littorina_littorea05-07-WEB.JPG\" target=\"_blank\"><img decoding=\"async\" src=\"\/documents\/images\/littorina_littorea05-07-WEB.JPG\" width=\"300\" alt=\"Bigorneau\" class \/><\/a><figcaption class=\"wp-caption-text\">Bigorneau (Roscoff, f\u00e9vrier 2007)<\/figcaption><\/figure>\n<p> &nbsp; <\/p>\n<p>Le Bigorneau (<em>Littorina littorea<\/em>) est un repr\u00e9sentant de la famille des Littorinid\u00e9s, au sein du groupe des Mollusques Gast\u00e9ropodes.<\/p>\n<p>Il a fait l&rsquo;objet de l&rsquo;article de la <a href=\"\/codex\/semaine-03-2014\">semaine 03-2014<\/a>.<\/p>\n<p> &nbsp; <\/p>\n<p>Dans cette esp\u00e8ce, les sexes sont s\u00e9par\u00e9s : il existe des individus femelles et des individus m\u00e2les. Elle est qualifi\u00e9e de gonochorique.<\/p>\n<p>La reproduction peut intervenir toute l&rsquo;ann\u00e9e mais elle se d\u00e9roule pr\u00e9f\u00e9rentiellement au printemps.<\/p>\n<p>\u00c0 la faveur d&rsquo;un accouplement, le m\u00e2le transf\u00e8re des spermatozo\u00efdes \u00e0 la femelle.<\/p>\n<p>Peu apr\u00e8s, celle-ci \u00e9met dans le milieu de petites capsules. Elles sont compos\u00e9es d&rsquo;une enveloppe g\u00e9latineuse qui abrite quelques \u0153ufs (au maximum cinq).<\/p>\n<p> &nbsp; <\/p>\n<p>Le <a href=\"\/codex\/glossaire\/glossaire-de-d-a-h#developpement-embryonnaire\" target=\"_blank\">d\u00e9veloppement embryonnaire<\/a> dure environ une semaine, alors que les capsules flottent dans l&rsquo;eau.<\/p>\n<p>L&rsquo;\u00e9closion lib\u00e8re des <a href=\"\/codex\/glossaire\/glossaire-de-i-a-o#larve\" target=\"_blank\">larves<\/a> qui \u00e9voluent dans le plancton.<br \/>\nApr\u00e8s un mois \u00e0 un mois et demi, elles subissent une <a href=\"\/codex\/glossaire\/glossaire-de-i-a-o#metamorphose\" target=\"_blank\">m\u00e9tamorphose<\/a> qui les transforme en individus <a href=\"\/codex\/glossaire\/glossaire-de-i-a-o#juvenile\" target=\"_blank\">juv\u00e9niles<\/a>, vivant sur le substrat.<\/p>\n<p>La premi\u00e8re reproduction intervient vers l&rsquo;\u00e2ge de deux ans, alors que la coquille atteint une hauteur de 15 mm environ.<\/p>\n<p> &nbsp; <\/p>\n<p>Les jeunes individus arborent souvent des coquilles de couleur claire, allant du beige au roux ou au brun.<\/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\u2019observations pour la reconnaissance et l\u2019identification de la faune et de la flore subaquatiques \u2013 F\u00e9d\u00e9ration fran\u00e7aise d\u2019\u00e9tudes et de sports sous-marins \u2013 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=1655\" target=\"_blank\">SCOUPPE Christian, ZIEMSKI Fr\u00e9d\u00e9ric,  in : DORIS, 13\/8\/2009 : Littorina littorea (Linnaeus, 1758)<\/a> (adresse : http:\/\/doris.ffessm.fr\/fiche2.asp?fiche_numero=1655)<\/p>\n<p> &nbsp; <\/p>\n<hr \/>\n","protected":false},"excerpt":{"rendered":"<p>Une citation \u00ab\u00a0La vie est un d\u00e9fi \u00e0 relever, un bonheur \u00e0 m\u00e9riter, une aventure \u00e0 tenter.\u00a0\u00bb M\u00e8re Teresa &nbsp; Une image &nbsp; Le Bigorneau (Littorina littorea) est un repr\u00e9sentant de la famille des Littorinid\u00e9s, au sein du groupe des Mollusques Gast\u00e9ropodes. Il a fait l&rsquo;objet de l&rsquo;article de la semaine 03-2014. &nbsp; Dans cette [&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-6050","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\/6050","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=6050"}],"version-history":[{"count":8,"href":"https:\/\/codexvirtualis.fr\/codex\/wp-json\/wp\/v2\/posts\/6050\/revisions"}],"predecessor-version":[{"id":6074,"href":"https:\/\/codexvirtualis.fr\/codex\/wp-json\/wp\/v2\/posts\/6050\/revisions\/6074"}],"wp:attachment":[{"href":"https:\/\/codexvirtualis.fr\/codex\/wp-json\/wp\/v2\/media?parent=6050"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/codexvirtualis.fr\/codex\/wp-json\/wp\/v2\/categories?post=6050"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/codexvirtualis.fr\/codex\/wp-json\/wp\/v2\/tags?post=6050"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}