{"id":6141,"date":"2014-03-03T08:00:39","date_gmt":"2014-03-03T07:00:39","guid":{"rendered":"http:\/\/codexvirtualis.fr\/codex\/?p=6141"},"modified":"2014-02-19T21:48:01","modified_gmt":"2014-02-19T20:48:01","slug":"semaine-10-2014","status":"publish","type":"post","link":"https:\/\/codexvirtualis.fr\/codex\/semaine-10-2014","title":{"rendered":"Semaine 10-2014"},"content":{"rendered":"

Une citation<\/h2>\n

\u00ab\u00a0On ne doit mettre son espoir qu’en soi-m\u00eame.\u00a0\u00bb<\/p>\n

Virgile<\/p>\n

  <\/p>\n

Une image<\/h2>\n
\"Ponte<\/a>
Capsules contenant des \u0153ufs de Buccin ond\u00e9 (Carantec, f\u00e9vrier 2009)<\/figcaption><\/figure>\n

  <\/p>\n

Le Buccin ond\u00e9 (Buccinum undatum<\/em>), Mollusque Gast\u00e9ropode repr\u00e9sentant de la famille des Buccinid\u00e9s, a fait l’objet de l’article de la semaine 09-2014<\/a>.<\/p>\n

  <\/p>\n

Dans cette esp\u00e8ce, les sexes sont s\u00e9par\u00e9s.<\/p>\n

Sur nos c\u00f4tes, les Buccins ond\u00e9s se regroupent en automne, saison de la reproduction.<\/p>\n

Le m\u00e2le transf\u00e8re des spermatozo\u00efdes \u00e0 la femelle \u00e0 la faveur d’un accouplement, qui conduit \u00e0 une f\u00e9condation interne.<\/p>\n

Apr\u00e8s quelques semaines, la femelle d\u00e9pose sur les rochers ou \u00e0 la base des algues des groupes de capsules. Ils forment des amas de couleur blanch\u00e2tre ou jaun\u00e2tre.
\nL’image de la semaine 09-2014<\/a> repr\u00e9sente cette oviposition.<\/p>\n

  <\/p>\n

Chaque capsule abrite de multiples \u0153ufs<\/a> en cours de d\u00e9veloppement.
\nAu sein de son enveloppe, le d\u00e9veloppement embryonnaire<\/a> dure 5 \u00e0 8 mois.
\nPendant cette p\u00e9riode, les embryons avort\u00e9s sont consomm\u00e9s par les embryons vivants, ph\u00e9nom\u00e8ne appel\u00e9 adelphophagie.<\/p>\n

Au terme du d\u00e9veloppement embryonnaire, quelques individus juv\u00e9niles<\/a> sont lib\u00e9r\u00e9s par l’ouverture des capsules.
\nSemblables aux adultes en termes de milieu et de mode vie mais aussi de morphologie et d’anatomie, ils t\u00e9moignent du d\u00e9veloppement direct<\/a> de l’esp\u00e8ce.
\nIls fr\u00e9quentent parfois la zone de balancement des mar\u00e9es.<\/p>\n

  <\/p>\n

La dur\u00e9e de vie des individus est de l’ordre de 10 ans alors que la maturit\u00e9 sexuelle est atteinte \u00e0 4 ou 5 ans.<\/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 FEY Laurent, BURON Daniel, M\u00dcLLER Yves, in : DORIS, 25\/1\/2014 : Buccinum undatum Linnaeus 1758<\/a> (adresse : http:\/\/doris.ffessm.fr\/fiche2.asp?fiche_numero=860)<\/p>\n

  <\/p>\n

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

Une citation \u00ab\u00a0On ne doit mettre son espoir qu’en soi-m\u00eame.\u00a0\u00bb Virgile   Une image   Le Buccin ond\u00e9 (Buccinum undatum), Mollusque Gast\u00e9ropode repr\u00e9sentant de la famille des Buccinid\u00e9s, a fait l’objet de l’article de la semaine 09-2014.   Dans cette esp\u00e8ce, les sexes sont s\u00e9par\u00e9s. Sur nos c\u00f4tes, les Buccins ond\u00e9s se regroupent en automne, […]<\/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-6141","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