{"id":6845,"date":"2026-06-04T19:00:20","date_gmt":"2026-06-04T19:00:20","guid":{"rendered":"https:\/\/pawel.stefanoff.pl\/bugs\/?p=6845"},"modified":"2026-07-21T17:58:32","modified_gmt":"2026-07-21T17:58:32","slug":"2026-06-mayfly-encounter-by-a-swedish-lake-pl","status":"publish","type":"post","link":"https:\/\/pawel.stefanoff.pl\/bugs\/pl\/posts\/2026-06-mayfly-encounter-by-a-swedish-lake-pl\/","title":{"rendered":"Spadaj\u0105c z nieba: Szcz\u0119\u015bliwe spotkanie z j\u0119tk\u0105 nad szwedzkim jeziorem"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Poznajcie j\u0119tk\u0119 pospolit\u0105 (<em>Ephemera vulgata<\/em>) \u2013 fascynuj\u0105cego owada wyst\u0119puj\u0105cego w Europie i cz\u0119\u015bci Azji, kt\u00f3ry koncepcj\u0119 \u201e\u017cycia chwil\u0105\u201d doprowadzi\u0142 do absolutnego ekstremum. Stworzenia te sp\u0119dzaj\u0105 lwi\u0105 cz\u0119\u015b\u0107 swojego \u017cycia \u2013 nawet do dw\u00f3ch lat \u2013 pod wod\u0105 jako nimfy, ukryte w rurkowatych norkach wykopanych w mule lub piasku na dnie staw\u00f3w i wolno p\u0142yn\u0105cych rzek. Aby przetrwa\u0107 w ubogim w tlen \u015brodowisku dennych osad\u00f3w, nimfy nieustannie faluj\u0105 pierzastymi skrzelotchawkami na odw\u0142oku, dzia\u0142aj\u0105c jak malutkie biologiczne pompy t\u0142ocz\u0105ce \u015bwie\u017c\u0105, natlenion\u0105 wod\u0119 przez swoje schronienia. Jednak ich wyj\u015bcie na l\u0105d to moment, w kt\u00f3rym biologia staje si\u0119 naprawd\u0119 osobliwa. J\u0119tki to jedne z nielicznych owad\u00f3w na Ziemi posiadaj\u0105cych po\u015brednie stadium skrzydlate zwane subimago. Wynurzaj\u0105 si\u0119 z wody ze skrzyd\u0142ami, przelatuj\u0105 na nadbrze\u017cn\u0105 ro\u015blinno\u015b\u0107 i tam liniej\u0105 po raz ostatni, staj\u0105c si\u0119 w pe\u0142ni dojrza\u0142ymi p\u0142ciowo doros\u0142ymi osobnikami (imago). Gdy osi\u0105gn\u0105 t\u0119 ostateczn\u0105 form\u0119, nie maj\u0105 ju\u017c ani sprawnych narz\u0105d\u00f3w g\u0119bowych, ani uk\u0142adu pokarmowego. Dos\u0142ownie nie mog\u0105 je\u015b\u0107. Skazane na \u017cycie wy\u0142\u0105cznie z zapas\u00f3w energii zgromadzonych w fazie larwalnej, maj\u0105 zaledwie od kilku godzin do paru dni na znalezienie partnera. Aby tego dokona\u0107, samce gromadz\u0105 si\u0119 w hipnotyzuj\u0105cych, powietrznych \u201eta\u0144cach godowych\u201d, wznosz\u0105c si\u0119 i opadaj\u0105c w wielkich rojach, w kt\u00f3re wlatuj\u0105 samice, by kopulowa\u0107 w locie. Podczas mojej d\u0142ugiej wyprawy rowerowej przez Szwecj\u0119 i Finlandi\u0119 widzia\u0142em wiele takich roj\u00f3w nad brzegami jezior i mia\u0142em ogromne szcz\u0119\u015bcie, gdy jedna z tych j\u0119tek spad\u0142a z nieba wprost na traw\u0119 przede mn\u0105, co umo\u017cliwi\u0142o mi wykonanie kilku dobrych uj\u0119\u0107.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Poznajcie j\u0119tk\u0119 pospolit\u0105 (Ephemera vulgata) \u2013 fascynuj\u0105cego owada wyst\u0119puj\u0105cego w Europie i cz\u0119\u015bci Azji, kt\u00f3ry koncepcj\u0119 \u201e\u017cycia chwil\u0105\u201d doprowadzi\u0142 do [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":6837,"comment_status":"open","ping_status":"open","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-5)","background-image":"","background-repeat":"repeat","background-position":"center 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