{"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\">&#8211; 1 &#8211; \u00c9mergence de Ischnura elegans m\u00e2le, Beaupr\u00e9au (F-49), 09\/07\/2008, 13 :11<\/figcaption><\/figure>\n\n\n\n<p>J&rsquo;ai observ\u00e9 cette \u00e9mergence d&rsquo;Ischnura elegans sur la petite mare artificielle de mon jardin alors que j&rsquo;avais encore un Apn qui n&rsquo;\u00e9tait pas vraiment fait pour photographier les odonates. Mon bassin n&rsquo;\u00e9tait alors peupl\u00e9 que de quelques petits poissons qui ne mena\u00e7aient pas trop les larves et j&rsquo;y ai observ\u00e9 de nombreuses \u00e9mergences de Zygopt\u00e8res et d&rsquo;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\">&#8211; 2 &#8211;                \u00c9mergence de Ischnura elegans m\u00e2le, Beaupr\u00e9au (F-49), 09\/07\/2008             &#8211; 3 &#8211;<\/figcaption><\/figure>\n\n\n\n<p>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&rsquo;individu d\u00e9chire le thorax de l&rsquo;ex-larve, juste en avant des fourreaux alaires. La place choisie, en pleine vue, est peu commune. Ils \u00e9mergent plus souvent \u00e0 l&rsquo;abri d&rsquo;une touffe de joncs ou autres, cach\u00e9s d&rsquo;\u00e9ventuels pr\u00e9dateurs.<br>Extirper son abdomen de l&rsquo;exuvie n&rsquo;est pas forc\u00e9ment facile et j&rsquo;ai vu des sujets dont l&rsquo;abdomen est rest\u00e9 coinc\u00e9 \u00e0 l&rsquo;int\u00e9rieur, se promenant, difficilement, avec leur d\u00e9pouille larvaire. Autant dire qu&rsquo;ils sont condamn\u00e9s.<br>\u00c0 ce stade, il est encore difficile de donner l&rsquo;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>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&rsquo;assister \u00e0 la \u00ab\u00a0naissance\u00a0\u00bb d&rsquo;un Agrion \u00e9l\u00e9gant. <br>Noter sur la photo de droite ci-dessus, le <em>fil<\/em> blanc qui unit encore l&rsquo;individu \u00e9mergent et son exuvie ; il s&rsquo;agit d&rsquo;une des <a href=\"http:\/\/meslibellules.fr\/pagesweb\/divers\/glossaire.php\">trach\u00e9es<\/a>, un <em>conduit<\/em>, charg\u00e9 d&rsquo;apporter de l&rsquo;air directement aux organes de la larve, les libellules n&rsquo;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>Notre jeune individu a d\u00e9cid\u00e9 de se d\u00e9rouiller les pattes, il n&rsquo;a pas pu aller bien loin, \u00e9tant entour\u00e9 d&rsquo;eau.<br>Noter la spectaculaire \u00e9volution des ailes, qui pr\u00e9c\u00e8de celle de l&rsquo;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&rsquo;ont pas de poumons, leur <em>sang<\/em>, que l&rsquo;on appelle <em>h\u00e9molymphe,<\/em> ne transporte pas d&rsquo;oxyg\u00e8ne, mais il joue un r\u00f4le essentiel lors de l&rsquo;\u00e9mergence, car sa mise sous pression permet l&rsquo;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\">&#8211; 8 &#8211;           \u00c9mergence de Ischnura elegans m\u00e2le, Beaupr\u00e9au (F-49), 09\/07\/2008, 13:50<\/figcaption><\/figure>\n\n\n\n<p>\u00c0 13 heures 50, l&rsquo;abdomen s&rsquo;est consid\u00e9rablement allong\u00e9, la coloration du thorax s&rsquo;affirme et les taches postoculaires sont apparues. J&rsquo;ai d\u00fb abandonner l&rsquo;observation alors que ce jeune Ischnura elegans n&rsquo;\u00e9tait pas encore tout \u00e0 fait pr\u00eat \u00e0 s&rsquo;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&rsquo;ai observ\u00e9 cette \u00e9mergence d&rsquo;Ischnura elegans sur la petite mare artificielle de mon jardin alors que j&rsquo;avais encore un Apn qui n&rsquo;\u00e9tait pas vraiment fait pour photographier les odonates. Mon bassin n&rsquo;\u00e9tait alors peupl\u00e9 que de quelques petits poissons qui ne mena\u00e7aient pas trop les larves et j&rsquo;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 v27.5 - 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