{"id":6577,"date":"2014-08-11T08:00:54","date_gmt":"2014-08-11T06:00:54","guid":{"rendered":"http:\/\/codexvirtualis.fr\/codex\/?p=6577"},"modified":"2015-01-12T20:36:19","modified_gmt":"2015-01-12T19:36:19","slug":"semaine-33-2014","status":"publish","type":"post","link":"https:\/\/codexvirtualis.fr\/codex\/semaine-33-2014","title":{"rendered":"Semaine 33-2014"},"content":{"rendered":"

Une citation<\/h2>\n

\u00ab\u00a0D\u00e9p\u00eachez vous de succomber \u00e0 la tentation avant qu’elle ne s’\u00e9loigne.\u00a0\u00bb<\/p>\n

G. Casanova<\/p>\n

  <\/p>\n

Une image<\/h2>\n
\"Citron<\/a>
Citron de mer (ponte – Roscoff, f\u00e9vrier 2005)<\/figcaption><\/figure>\n

  <\/p>\n

Le Citron de mer (Doris pseudoargus<\/em>) est un Mollusque Gast\u00e9ropode du groupe des Nudibranches et de la famille des Doridid\u00e9s.<\/p>\n

Il a fait l’objet de l’article de la semaine 32-2014<\/a>.<\/p>\n

  <\/p>\n

Le Citron de mer est une esp\u00e8ce hermaphrodite. Les individus produisent des gam\u00e8tes m\u00e2les, les spermatozo\u00efdes, et des gam\u00e8tes femelles, les ovules.<\/p>\n

Au printemps intervient un accouplement au cours duquel les partenaires \u00e9changent leurs spermatozo\u00efdes.<\/p>\n

La f\u00e9condation est \u00e0 l’origine de la formation d’\u0153ufs<\/a>.
\nIls sont d\u00e9pos\u00e9s dans le milieu sous forme de rubans spiral\u00e9s adh\u00e9rant aux rochers, dont la couleur varie du blanc \u00e0 l’orange.
\nChaque ruban comporte plusieurs dizaines de milliers d’\u0153ufs enrob\u00e9s de capsules et d’une matrice prot\u00e9ique.<\/p>\n

Au terme du d\u00e9veloppement embryonnaire<\/a> dont la dur\u00e9e moyenne est d’environ quatre semaines, l’\u00e9closion lib\u00e8re des larves<\/a> planctoniques.<\/p>\n

Apr\u00e8s trois mois de vie en pleine eau, elles subissent une m\u00e9tamorphose<\/a> les transformant en juv\u00e9niles<\/a>. Ils croissent durant l’automne et l’hiver, avant de se reproduire au printemps suivant et de mourir.<\/p>\n

La dur\u00e9e de vie des individus est de l’ordre d’une ann\u00e9e.<\/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, 2\/4\/2014 : Doris pseudoargus Rapp, 1827<\/a> (adresse : http:\/\/doris.ffessm.fr\/fiche2.asp?fiche_numero=574)<\/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\u00a0D\u00e9p\u00eachez vous de succomber \u00e0 la tentation avant qu’elle ne s’\u00e9loigne.\u00a0\u00bb G. Casanova   Une image   Le Citron de mer (Doris pseudoargus) est un Mollusque Gast\u00e9ropode du groupe des Nudibranches et de la famille des Doridid\u00e9s. Il a fait l’objet de l’article de la semaine 32-2014.   Le Citron de mer est […]<\/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":"","jetpack_post_was_ever_published":false},"categories":[1],"tags":[28,12,23],"class_list":["post-6577","post","type-post","status-publish","format-standard","hentry","category-a-la-une","tag-biologie","tag-mollusque","tag-observation"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\n\t\t