{"id":7970,"date":"2015-10-12T08:00:12","date_gmt":"2015-10-12T06:00:12","guid":{"rendered":"http:\/\/codexvirtualis.fr\/codex\/?p=7970"},"modified":"2015-11-02T21:46:18","modified_gmt":"2015-11-02T20:46:18","slug":"semaine-42-2015","status":"publish","type":"post","link":"https:\/\/codexvirtualis.fr\/codex\/semaine-42-2015","title":{"rendered":"Semaine 42-2015"},"content":{"rendered":"

Une citation<\/h2>\n

\u00ab\u00a0Quand l’idiot se voit tel qu’il est alors il n’en est plus un ; et lorsqu’un sage tire un enseignement de sa sagesse alors il devient idiot.\u00a0\u00bb<\/p>\n

D. Gemmell<\/p>\n

  <\/p>\n

Une image<\/h2>\n
\"Dahlia<\/a>
Dahlia de mer (Roscoff, f\u00e9vrier 2011)<\/figcaption><\/figure>\n

  <\/p>\n

Le Dahlia de mer (Urticina felina<\/em>) est une An\u00e9mone de mer, appartenant au groupe des Cnidaires et plus particuli\u00e8rement \u00e0 la famille des Actiniid\u00e9s.<\/p>\n

Cette esp\u00e8ce est pr\u00e9sente dans la zone intertidale, alternativement couverte et d\u00e9couverte par la mar\u00e9e, et jusqu’\u00e0 une profondeur de l’ordre d’une centaine de m\u00e8tres.<\/p>\n

Elle affectionne les milieux rocheux battus par les vagues, o\u00f9 elle vit solidement fix\u00e9e sur les rochers, dans les cuvettes ou les crevasses g\u00e9n\u00e9ralement \u00e0 l’ombre. Elle est \u00e9galement rencontr\u00e9e en milieu sableux d\u00e8s lors que des supports durs sont disponibles.<\/p>\n

  <\/p>\n

Le Dahlia de mer est reconnaissable \u00e0 sa forme, ses dimensions, ses couleurs et ses ornementations.<\/p>\n

Le corps est form\u00e9 d’une colonne trapue fix\u00e9e au support par une large base, portant \u00e0 l’oppos\u00e9 une bouche entour\u00e9e d’une couronne de tentacules, dont le nombre est compris entre 80 et 160.
\nLorsque les individus sont \u00e9merg\u00e9s, les tentacules sont r\u00e9tract\u00e9s dans la colonne.<\/p>\n

La taille des individus adultes<\/a> est importante : le diam\u00e8tre de leur colonne atteint 100 mm, la longueur de leurs tentacules \u00e9tant de 20 mm environ.<\/p>\n

La couleur de l’esp\u00e8ce est variable : elle peut \u00eatre blanche, jaune, orange, rouge, brune voire violette, bleue ou grise. Certains individus ont une couleur uniforme alors que d’autres sont bigarr\u00e9s, au niveau de la colonne comme des tentacules.<\/p>\n

La colonne porte de multiples verrues blanch\u00e2tres et est fr\u00e9quemment recouverte de d\u00e9bris.<\/p>\n

  <\/p>\n

Pour en savoir plus, consulter :<\/p>\n

• <\/span>le site 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

et notamment<\/p>\n

• <\/span>la fiche MARAN Vincent, M\u00dcLLER Yves, ZIEMSKI Fr\u00e9d\u00e9ric, in : DORIS, 17\/4\/2014 : Urticina felina (Linnaeus, 1761)<\/a> (adresse : http:\/\/doris.ffessm.fr\/fiche2.asp?fiche_numero=131 ; consult\u00e9 le 20 septembre 2015)<\/p>\n

• <\/span>le site Marlin<\/a> (The marine life information network \u2013 en anglais \u2013 adresse http:\/\/www.marlin.ac.uk)<\/p>\n

  <\/p>\n

\n","protected":false},"excerpt":{"rendered":"

Une citation \u00ab\u00a0Quand l’idiot se voit tel qu’il est alors il n’en est plus un ; et lorsqu’un sage tire un enseignement de sa sagesse alors il devient idiot.\u00a0\u00bb D. Gemmell   Une image   Le Dahlia de mer (Urticina felina) est une An\u00e9mone de mer, appartenant au groupe des Cnidaires et plus particuli\u00e8rement \u00e0 […]<\/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":[28,39,23],"class_list":["post-7970","post","type-post","status-publish","format-standard","hentry","category-a-la-une","tag-biologie","tag-cnidaire","tag-observation"],"aioseo_notices":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/codexvirtualis.fr\/codex\/wp-json\/wp\/v2\/posts\/7970","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=7970"}],"version-history":[{"count":3,"href":"https:\/\/codexvirtualis.fr\/codex\/wp-json\/wp\/v2\/posts\/7970\/revisions"}],"predecessor-version":[{"id":7972,"href":"https:\/\/codexvirtualis.fr\/codex\/wp-json\/wp\/v2\/posts\/7970\/revisions\/7972"}],"wp:attachment":[{"href":"https:\/\/codexvirtualis.fr\/codex\/wp-json\/wp\/v2\/media?parent=7970"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/codexvirtualis.fr\/codex\/wp-json\/wp\/v2\/categories?post=7970"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/codexvirtualis.fr\/codex\/wp-json\/wp\/v2\/tags?post=7970"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}