{"id":5011,"date":"2013-07-29T08:00:42","date_gmt":"2013-07-29T06:00:42","guid":{"rendered":"http:\/\/codexvirtualis.fr\/codex\/?p=5011"},"modified":"2013-07-21T22:09:51","modified_gmt":"2013-07-21T20:09:51","slug":"semaine-31-2013","status":"publish","type":"post","link":"https:\/\/codexvirtualis.fr\/codex\/semaine-31-2013","title":{"rendered":"Semaine 31-2013"},"content":{"rendered":"

Une citation<\/h2>\n

\u00ab\u00a0Ne craignez pas d’\u00eatre lent, craignez seulement d’\u00eatre \u00e0 l’arr\u00eat.\u00a0\u00bb<\/p>\n

Proverbe chinois<\/p>\n

  <\/p>\n

Une image<\/h2>\n
\"Accouplement<\/a>
Accouplement d’Agrion d\u00e9licat (Lyon, juillet 2011 – G. Rigaud)<\/figcaption><\/figure>\n

  <\/p>\n

L’Agrion d\u00e9licat (Ceriagrion tenellum<\/em>) est un Insecte de l’ordre des Odonates<\/a> et de la famille des Coenagrionid\u00e9s.<\/p>\n

De m\u00eame que l’Agrion \u00e9clatant qui a fait l’objet de l’article de la semaine 30-2013<\/a>, il s’agit d’un repr\u00e9sentant du groupe des Demoiselles (Zygopt\u00e8res), au corps fin et aux ailes dress\u00e9es au repos. <\/p>\n

Les adultes<\/a> de cette esp\u00e8ce fr\u00e9quentent les petits cours d’eau lents ainsi que les \u00e9coulements, et sont pr\u00e9sents d’avril \u00e0 octobre lorsque les conditions sont favorables, leur abondance \u00e9tant particuli\u00e8rement marqu\u00e9e durant les mois de juillet et ao\u00fbt.<\/p>\n

  <\/p>\n

D’une longueur moyenne de 30 mm, l’Agrion d\u00e9licat est caract\u00e9ris\u00e9 par son abdomen rouge, au moins partiellement, ses pattes rouges et la possession d’une tache rouge (appel\u00e9e pt\u00e9rostigma) ornant la r\u00e9gion ant\u00e9rieure de ses ailes.
\nSi le m\u00e2le pr\u00e9sente un abdomen compl\u00e8tement rouge, celui de la femelle est plus variable.<\/p>\n

  <\/p>\n

Comme chez les autres Demoiselles, l’accouplement donne lieu \u00e0 la formation d’un c\u0153ur copulatoire : l’extr\u00e9mit\u00e9 de l’abdomen du m\u00e2le enserre le cou de la femelle tandis que l’extr\u00e9mit\u00e9 abdominale de cette derni\u00e8re est plac\u00e9e au contact des premiers segments abdominaux du m\u00e2le.<\/p>\n

Au cours de cet accouplement, les spermatozo\u00efdes du m\u00e2le sont transf\u00e9r\u00e9s \u00e0 la femelle.
\nApr\u00e8s la f\u00e9condation, elle d\u00e9pose des \u0153ufs dans des v\u00e9g\u00e9taux aquatiques.<\/p>\n

Au terme de quelques semaines de d\u00e9veloppement embryonnaire<\/a>, les \u0153ufs lib\u00e8rent des larves<\/a> aquatiques, qui grandissent \u00e0 la faveur d’une douzaine de mues<\/a>.
\nElles passent l’hiver avant de s’extraire du milieu aquatique et de donner naissance \u00e0 de nouveaux adultes.<\/p>\n

  <\/p>\n

Adultes et larves d’Agrion d\u00e9licat sont carnivores : les premiers se nourrissent principalement d’Insectes et les secondes de larves diverses et \u00e9galement d’Insectes.<\/p>\n

  <\/p>\n

Pour :<\/p>\n

\u0095\u2022 <\/span>en savoir plus sur le cycle de vie des Odonates, consulter la page Dans l’intimit\u00e9 des Demoiselles<\/a> de Codex virtualis<\/p>\n

\u2022 <\/span>acc\u00e9der aux images des Demoiselles et Libellules des parcs de Gerland et des berges du Rh\u00f4ne<\/a><\/p>\n

\u0095\u2022 <\/span>des informations compl\u00e8tes, voir Genty Vincent, Kupfer Michel, in : DORIS, 26\/12\/2009 : Ceriagrion tenellum (Villers, 1789)<\/a> (adresse: http:\/\/doris.ffessm.fr\/fiche2.asp?fiche_numero=1903)<\/p>\n

  <\/p>\n

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

Une citation \u00ab\u00a0Ne craignez pas d’\u00eatre lent, craignez seulement d’\u00eatre \u00e0 l’arr\u00eat.\u00a0\u00bb Proverbe chinois   Une image   L’Agrion d\u00e9licat (Ceriagrion tenellum) est un Insecte de l’ordre des Odonates et de la famille des Coenagrionid\u00e9s. De m\u00eame que l’Agrion \u00e9clatant qui a fait l’objet de l’article de la semaine 30-2013, il s’agit d’un repr\u00e9sentant du […]<\/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":[28,17,23],"class_list":["post-5011","post","type-post","status-publish","format-standard","hentry","category-a-la-une","tag-biologie","tag-insecte","tag-observation"],"aioseo_notices":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/codexvirtualis.fr\/codex\/wp-json\/wp\/v2\/posts\/5011","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=5011"}],"version-history":[{"count":26,"href":"https:\/\/codexvirtualis.fr\/codex\/wp-json\/wp\/v2\/posts\/5011\/revisions"}],"predecessor-version":[{"id":5071,"href":"https:\/\/codexvirtualis.fr\/codex\/wp-json\/wp\/v2\/posts\/5011\/revisions\/5071"}],"wp:attachment":[{"href":"https:\/\/codexvirtualis.fr\/codex\/wp-json\/wp\/v2\/media?parent=5011"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/codexvirtualis.fr\/codex\/wp-json\/wp\/v2\/categories?post=5011"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/codexvirtualis.fr\/codex\/wp-json\/wp\/v2\/tags?post=5011"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}