{"id":17742,"date":"2024-01-06T20:40:06","date_gmt":"2024-01-06T19:40:06","guid":{"rendered":"https:\/\/www.meslibellules.fr\/blog\/?p=17742"},"modified":"2024-01-06T21:13:33","modified_gmt":"2024-01-06T20:13:33","slug":"emergence-de-ischnura-elegans","status":"publish","type":"post","link":"https:\/\/www.meslibellules.fr\/blog\/2024\/01\/06\/emergence-de-ischnura-elegans\/","title":{"rendered":"\u00c9mergence de Ischnura elegans m\u00e2le"},"content":{"rendered":"\n<figure class=\"wp-block-image aligncenter size-full is-resized\"><a href=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Emergence-Ischnura-elegans-male-1.webp\"><img decoding=\"async\" width=\"1209\" height=\"1004\" data-src=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Emergence-Ischnura-elegans-male-1.webp\" alt=\"\u00c9mergence d'Ischnura elegans m\u00e2le, Beaupr\u00e9au (F-49), 09\/07\/2008\" class=\"wp-image-17743 lazyload\" style=\"--smush-placeholder-width: 1209px; --smush-placeholder-aspect-ratio: 1209\/1004;width:555px;height:auto\" data-srcset=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Emergence-Ischnura-elegans-male-1.webp 1209w, https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Emergence-Ischnura-elegans-male-1-768x638.webp 768w\" data-sizes=\"(max-width: 1209px) 100vw, 1209px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" \/><\/a><figcaption class=\"wp-element-caption\">- 1 - \u00c9mergence de Ischnura elegans m\u00e2le, Beaupr\u00e9au (F-49), 09\/07\/2008, 13 :11<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">J'ai observ\u00e9 cette \u00e9mergence d'Ischnura elegans sur la petite mare artificielle de mon jardin alors que j'avais encore un Apn qui n'\u00e9tait pas vraiment fait pour photographier les odonates. Mon bassin n'\u00e9tait alors peupl\u00e9 que de quelques petits poissons qui ne mena\u00e7aient pas trop les larves et j'y ai observ\u00e9 de nombreuses \u00e9mergences de Zygopt\u00e8res et d'Epiproctophores (ex-anisopt\u00e8res).<\/p>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-default is-cropped wp-block-gallery-1 is-layout-flex wp-block-gallery-is-layout-flex\">\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Emergence-Ischnura-elegans-male-2.webp\"><img decoding=\"async\" width=\"1427\" height=\"1004\" data-id=\"17746\" data-src=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Emergence-Ischnura-elegans-male-2.webp\" alt=\"\u00c9mergence d'Ischnura elegans m\u00e2le, Beaupr\u00e9au (F-49), 09\/07\/2008\" class=\"wp-image-17746 lazyload\" data-srcset=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Emergence-Ischnura-elegans-male-2.webp 1427w, https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Emergence-Ischnura-elegans-male-2-768x540.webp 768w\" data-sizes=\"(max-width: 1427px) 100vw, 1427px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 1427px; --smush-placeholder-aspect-ratio: 1427\/1004;\" \/><\/a><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Emergence-Ischnura-elegans-male-3.webp\"><img decoding=\"async\" width=\"1355\" height=\"1004\" data-id=\"17747\" data-src=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Emergence-Ischnura-elegans-male-3.webp\" alt=\"\u00c9mergence d'Ischnura elegans m\u00e2le, Beaupr\u00e9au (F-49), 09\/07\/2008\" class=\"wp-image-17747 lazyload\" data-srcset=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Emergence-Ischnura-elegans-male-3.webp 1355w, https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Emergence-Ischnura-elegans-male-3-768x569.webp 768w\" data-sizes=\"(max-width: 1355px) 100vw, 1355px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 1355px; --smush-placeholder-aspect-ratio: 1355\/1004;\" \/><\/a><\/figure>\n<figcaption class=\"blocks-gallery-caption wp-element-caption\">- 2 -                \u00c9mergence de Ischnura elegans m\u00e2le, Beaupr\u00e9au (F-49), 09\/07\/2008             - 3 -<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Une feuille de n\u00e9nuphar est un endroit id\u00e9al pour observer une \u00e9mergence, malheureusement, je ne suis pas arriv\u00e9 au tout d\u00e9but, lorsque le thorax de l'individu d\u00e9chire le thorax de l'ex-larve, juste en avant des fourreaux alaires. La place choisie, en pleine vue, est peu commune. Ils \u00e9mergent plus souvent \u00e0 l'abri d'une touffe de joncs ou autres, cach\u00e9s d'\u00e9ventuels pr\u00e9dateurs.<br>Extirper son abdomen de l'exuvie n'est pas forc\u00e9ment facile et j'ai vu des sujets dont l'abdomen est rest\u00e9 coinc\u00e9 \u00e0 l'int\u00e9rieur, se promenant, difficilement, avec leur d\u00e9pouille larvaire. Autant dire qu'ils sont condamn\u00e9s.<br>\u00c0 ce stade, il est encore difficile de donner l'identit\u00e9 de ce zygopt\u00e8re.<\/p>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-default is-cropped wp-block-gallery-2 is-layout-flex wp-block-gallery-is-layout-flex\">\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Emergence-Ischnura-elegans-male-4.webp\"><img decoding=\"async\" width=\"1660\" height=\"1004\" data-id=\"17749\" data-src=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Emergence-Ischnura-elegans-male-4.webp\" alt=\"\u00c9mergence d'Agrion \u00e9l\u00e9gant m\u00e2le, Beaupr\u00e9au (F-49), 09\/07\/2008\" class=\"wp-image-17749 lazyload\" data-srcset=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Emergence-Ischnura-elegans-male-4.webp 1660w, https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Emergence-Ischnura-elegans-male-4-768x465.webp 768w, https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Emergence-Ischnura-elegans-male-4-1536x929.webp 1536w\" data-sizes=\"(max-width: 1660px) 100vw, 1660px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 1660px; --smush-placeholder-aspect-ratio: 1660\/1004;\" \/><\/a><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Emergence-Ischnura-elegans-male-5.webp\"><img decoding=\"async\" width=\"1660\" height=\"1004\" data-id=\"17750\" data-src=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Emergence-Ischnura-elegans-male-5.webp\" alt=\"\u00c9mergence d'Ischnura elegans m\u00e2le, Beaupr\u00e9au (F-49), 09\/07\/2008\" class=\"wp-image-17750 lazyload\" data-srcset=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Emergence-Ischnura-elegans-male-5.webp 1660w, https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Emergence-Ischnura-elegans-male-5-768x465.webp 768w, https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Emergence-Ischnura-elegans-male-5-1536x929.webp 1536w\" data-sizes=\"(max-width: 1660px) 100vw, 1660px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 1660px; --smush-placeholder-aspect-ratio: 1660\/1004;\" \/><\/a><\/figure>\n<figcaption class=\"blocks-gallery-caption wp-element-caption\">-4-               \u00c9mergence de Ischnura elegans m\u00e2le, Beaupr\u00e9au (F-49), 09\/07\/2008            -5-<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Mais, d\u00e8s les photos ci-dessus, on devine une diff\u00e9rence de coloration de la face sup\u00e9rieure du 8\u00b0 segment abdominal. Et comme la coloration ne touche que ce segment, on peut d\u00e9j\u00e0 \u00eatre certain d'assister \u00e0 la \"naissance\" d'un Agrion \u00e9l\u00e9gant. <br>Noter sur la photo de droite ci-dessus, le <em>fil<\/em> blanc qui unit encore l'individu \u00e9mergent et son exuvie ; il s'agit d'une des <a href=\"http:\/\/meslibellules.fr\/pagesweb\/divers\/glossaire.php\">trach\u00e9es<\/a>, un <em>conduit<\/em>, charg\u00e9 d'apporter de l'air directement aux organes de la larve, les libellules n'ont pas de poumons.<\/p>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-default is-cropped wp-block-gallery-3 is-layout-flex wp-block-gallery-is-layout-flex\">\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Emergence-Ischnura-elegans-male-6.webp\"><img decoding=\"async\" width=\"1858\" height=\"1204\" data-id=\"17751\" data-src=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Emergence-Ischnura-elegans-male-6.webp\" alt=\"\u00c9mergence d'Ischnura elegans m\u00e2le, Beaupr\u00e9au (F-49), 09\/07\/2008\" class=\"wp-image-17751 lazyload\" data-srcset=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Emergence-Ischnura-elegans-male-6.webp 1858w, https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Emergence-Ischnura-elegans-male-6-768x498.webp 768w, https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Emergence-Ischnura-elegans-male-6-1536x995.webp 1536w\" data-sizes=\"(max-width: 1858px) 100vw, 1858px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 1858px; --smush-placeholder-aspect-ratio: 1858\/1204;\" \/><\/a><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Emergence-Ischnura-elegans-male-7.webp\"><img decoding=\"async\" width=\"1892\" height=\"1204\" data-id=\"17752\" data-src=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Emergence-Ischnura-elegans-male-7.webp\" alt=\"\u00c9mergence d'Agrion \u00e9l\u00e9gant m\u00e2le, Beaupr\u00e9au (F-49), 09\/07\/2008\" class=\"wp-image-17752 lazyload\" data-srcset=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Emergence-Ischnura-elegans-male-7.webp 1892w, https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Emergence-Ischnura-elegans-male-7-768x489.webp 768w, https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Emergence-Ischnura-elegans-male-7-1536x977.webp 1536w\" data-sizes=\"(max-width: 1892px) 100vw, 1892px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 1892px; --smush-placeholder-aspect-ratio: 1892\/1204;\" \/><\/a><\/figure>\n<figcaption class=\"blocks-gallery-caption wp-element-caption\">-6-                    \u00c9mergence de Ischnura elegans m\u00e2le, Beaupr\u00e9au (F-49), 09\/07\/2008                -7-<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Notre jeune individu a d\u00e9cid\u00e9 de se d\u00e9rouiller les pattes, il n'a pas pu aller bien loin, \u00e9tant entour\u00e9 d'eau.<br>Noter la spectaculaire \u00e9volution des ailes, qui pr\u00e9c\u00e8de celle de l'abdomen, entre les photos 5, 6 et 7.<br>Remarquer \u00e9galement la tache verte sur les ailes des photos 7 et 8 ; car si les libellules n'ont pas de poumons, leur <em>sang<\/em>, que l'on appelle <em>h\u00e9molymphe,<\/em> ne transporte pas d'oxyg\u00e8ne, mais il joue un r\u00f4le essentiel lors de l'\u00e9mergence, car sa mise sous pression permet l'expansion des structures. Parfois, comme ici, une nervure bris\u00e9e laisse \u00e9chapper ce liquide.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full is-resized\"><a href=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Emergence-Ischnura-elegans-male-8.webp\"><img decoding=\"async\" width=\"1985\" height=\"1204\" data-src=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Emergence-Ischnura-elegans-male-8.webp\" alt=\"\u00c9mergence d'Ischnura elegans m\u00e2le, Beaupr\u00e9au (F-49), 09\/07\/2008\" class=\"wp-image-17754 lazyload\" style=\"--smush-placeholder-width: 1985px; --smush-placeholder-aspect-ratio: 1985\/1204;width:655px;height:auto\" data-srcset=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Emergence-Ischnura-elegans-male-8.webp 1985w, https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Emergence-Ischnura-elegans-male-8-768x466.webp 768w, https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Emergence-Ischnura-elegans-male-8-1536x932.webp 1536w\" data-sizes=\"(max-width: 1985px) 100vw, 1985px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" \/><\/a><figcaption class=\"wp-element-caption\">- 8 -           \u00c9mergence de Ischnura elegans m\u00e2le, Beaupr\u00e9au (F-49), 09\/07\/2008, 13:50<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u00c0 13 heures 50, l'abdomen s'est consid\u00e9rablement allong\u00e9, la coloration du thorax s'affirme et les taches postoculaires sont apparues. J'ai d\u00fb abandonner l'observation alors que ce jeune Ischnura elegans n'\u00e9tait pas encore tout \u00e0 fait pr\u00eat \u00e0 s'envoler, on <em>devine<\/em> ses ailes encore trop molles. Quelques dizaines de minutes de soleil ach\u00e8veront la polym\u00e9risation de sa cuticule et le durcissement de ses ailes. <br>Quand je suis revenu, cinq heures plus tard, il avait bien s\u00fbr disparu.<\/p>\n\n\n\n<div style=\"height:78px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<div class=\"wp-block-buttons is-layout-flex wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link wp-element-button\" href=\"https:\/\/www.meslibellules.fr\/blog\/ischnura-elegans-3\/\">Accueil Ischnura elegans<\/a><\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>J'ai observ\u00e9 cette \u00e9mergence d'Ischnura elegans sur la petite mare artificielle de mon jardin alors que j'avais encore un Apn qui n'\u00e9tait pas vraiment fait pour photographier les odonates. Mon bassin n'\u00e9tait alors peupl\u00e9 que de quelques petits poissons qui ne mena\u00e7aient pas trop les larves et j'y ai observ\u00e9 de nombreuses \u00e9mergences de Zygopt\u00e8res [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"image","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":"set","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":[60,55,61],"tags":[508,381,364],"class_list":["post-17742","post","type-post","status-publish","format-image","hentry","category-coenagrionidae-france","category-france","category-ischnura-elegans","tag-coenagrionidae-france","tag-france","tag-ischnura-elegans","post_format-post-format-image"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.8 - 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