{"id":7946,"date":"2026-07-22T10:27:35","date_gmt":"2026-07-22T07:27:35","guid":{"rendered":"https:\/\/www.schooler.org.ua\/demogorgonichtis-najridkisnisha-bezoka-riba-z-pecher-alabami\/"},"modified":"2026-07-22T10:27:35","modified_gmt":"2026-07-22T07:27:35","slug":"demogorgonichtis-najridkisnisha-bezoka-riba-z-pecher-alabami","status":"publish","type":"post","link":"https:\/\/www.schooler.org.ua\/cs\/demogorgonichtis-nejvzacnejsi-ryba-bez-oci-z-alabamskych-jeskyni\/","title":{"rendered":"Demogorgonichtis: nejvz\u00e1cn\u011bj\u0161\u00ed ryba bez o\u010d\u00ed z Alabamsk\u00fdch jeskyn\u00ed"},"content":{"rendered":"

Bobcat Cave nen\u00ed pro ty, kte\u0159\u00ed trp\u00ed klaustrofobi\u00ed. Tento v\u00e1pencov\u00fd syst\u00e9m, zastr\u010den\u00fd pobl\u00ed\u017e Huntsville v Alabam\u011b, je sotva 1 490 stop dlouh\u00fd, ale proch\u00e1z\u00ed \u00fazk\u00fdmi pr\u016fchody. Tady se nechod\u00ed, tady se plaz\u00ed. Zatopen\u00e9 tunely a bahnit\u00e9 cesty definuj\u00ed jedinou cestu vp\u0159ed. Jeskynn\u00ed pr\u016fzkumn\u00edci ji\u017e t\u00e9m\u011b\u0159 \u010dty\u0159icet let bedliv\u011b sleduj\u00ed jednoho k\u0159ehk\u00e9ho obyvatele \u2013 jeskynn\u00ed krevety Alabama (Palaemonias alabamae<\/em> ). Tito drobn\u00ed pr\u016fsvitn\u00ed kor\u00fd\u0161i jsou sotva viditeln\u00ed pouh\u00fdm okem. Jsou tak\u00e9 kriticky ohro\u017een\u00e9 a nach\u00e1zej\u00ed se pouze v ur\u010dit\u00fdch jeskynn\u00edch syst\u00e9mech mezi Alabamou a Tennessee. Jsou d\u016fle\u017eit\u00e9. Biologov\u00e9 je bedliv\u011b sleduj\u00ed, proto\u017ee jejich ztr\u00e1ta by znamenala ztr\u00e1tu kousku biologick\u00e9 historie, kter\u00e1 nikde jinde neexistuje. <\/p>\n

Jeskyn\u011b ale skr\u00fdv\u00e1 tajemstv\u00ed, kter\u00e1 po desetilet\u00ed neuk\u00e1zala. <\/p>\n

Ned\u00e1vn\u00e9 expedice do jeskyn\u011b Bobcat odhalily n\u011bco ne\u010dekan\u00e9ho \u010d\u00edhaj\u00edc\u00edho ve tm\u011b. Nebyly to krevety. Byla to ryba. <\/p>\n

Bled\u00fd. Nevidom\u00fd. M\u00e9n\u011b ne\u017e dva palce dlouh\u00e9. Toto stvo\u0159en\u00ed je d\u00e9monick\u00e1 jeskynn\u00ed ryba<\/strong> (Demogorgonichthys arcanus<\/em> ). Ano, jm\u00e9no zn\u00ed jako jm\u00e9no padoucha ze sci-fi filmu, ale biologie je zde v\u00e1\u017en\u00e1. Objev publikovan\u00fd v \u010dasopise Scientific Reports<\/em> p\u0159edstavuje v\u00edce ne\u017e jen nov\u00e9 jm\u00e9no pro p\u016fvodn\u00edho pred\u00e1tora. Je to genetick\u00fd outsider, natolik odli\u0161n\u00fd od ostatn\u00edch, \u017ee pro n\u011bj v\u011bdci museli vytvo\u0159it zcela nov\u00fd rod. To z n\u011bj \u010din\u00ed potenci\u00e1ln\u011b jednu z nejvz\u00e1cn\u011bj\u0161\u00edch ryb na planet\u011b. <\/p>\n

Genetick\u00e1 anom\u00e1lie ve tm\u011b<\/h3>\n

“Nach\u00e1z\u00edme rozd\u00edly mezi organismy, kter\u00e9 jsme ji\u017e znali,” \u0159ekl Jonathan Armbruster, spoluautor studie a kur\u00e1tor na Auburn University. “Ale tohle bylo jin\u00e9. Tohle je\u0161t\u011b nikdo nevid\u011bl. To je opravdu vz\u00e1cn\u00e9.” <\/p>\n

Ryba pat\u0159\u00ed do rodiny jeskynn\u00edch ryb p\u0159\u00edbuzn\u00fdch jeskynn\u00edm ryb\u00e1m ji\u017en\u00edm (Typhlichthys subterrane<\/em> ) a stejn\u011b nepolapiteln\u00fdm alabamsk\u00fdm jeskynn\u00edm ryb\u00e1m (Speoplatyrhinus poulsoni<\/em> ). Ale pod\u00edvejte se bl\u00ed\u017ee na Demogorgonichthys arcanus<\/em>. Jej\u00ed tlama je jedine\u010dn\u00e1. Tvar t\u011bla se li\u0161\u00ed od jeho p\u0159\u00edbuzn\u00fdch. A co barva? Je pry\u010d. Je bled\u011b b\u00edl\u00e1, slep\u00e1 a p\u0159izp\u016fsoben\u00e1 \u017eivotu bez slune\u010dn\u00edho sv\u011btla. <\/p>\n

Nejmarkantn\u011bj\u0161\u00ed rozd\u00edl v\u0161ak spo\u010d\u00edv\u00e1 v jeho DNA. <\/p>\n

V\u011bt\u0161ina jeskynn\u00edch ryb si zachov\u00e1v\u00e1 n\u011bkter\u00e9 z\u00e1kladn\u00ed fotosenzitivn\u00ed funkce. To je evolu\u010dn\u00ed balast. Ale v d\u00e9monick\u00e9 jeskynn\u00ed ryb\u011b<\/strong> je tento mechanismus zcela ztracen. Konkr\u00e9tn\u011b: chyb\u00ed \u010d\u00e1st genu rhodopsin<\/em>, proteinu nezbytn\u00e9ho pro detekci sv\u011btla. <\/p>\n

“Ji\u017en\u00ed jeskynn\u00ed ryby jasn\u011b reaguj\u00ed na sv\u011btlo,” \u0159ekl Armbruster. “U t\u00e9to ryby takovou reakci nevid\u00edme. N\u011bjak\u00fd rodopsin chyb\u00ed. U\u017e nefunguje.” <\/p>\n

Nepot\u0159ebuje o\u010di. Nepot\u0159ebuje sv\u011btlo. Pot\u0159ebuje jen vodu a stabilitu v temn\u00e9m v\u00e1pencov\u00e9m labyrintu. <\/p>\n

Pro\u010d tak d\u011bsiv\u00e9 jm\u00e9no?<\/h3>\n

Pod\u00edvejme se na jm\u00e9no Demogorgonichthys<\/em>. Zn\u00ed to d\u011bsiv\u011b. P\u0159ipom\u00edn\u00e1 monstrum z “The Upside Down” (Stranger Things<\/em> ). Ale jm\u00e9no nepoch\u00e1z\u00ed z Hawkins, Indiana. M\u00e1 ko\u0159eny ve starov\u011bk\u00e9m \u0158ecku. <\/p>\n

John Milton pou\u017eil toto jm\u00e9no ve sv\u00e9 b\u00e1sni Ztracen\u00fd r\u00e1j. Pamela Hartov\u00e1, spoluautorka a biolo\u017eka z University of Alabama, dlouhodob\u011b vede seznam mytologick\u00fdch postav podsv\u011bt\u00ed. Pot\u0159ebovala jm\u00e9no, kter\u00e9 by se hodilo k atmosf\u00e9\u0159e stvo\u0159en\u00ed \u017eij\u00edc\u00edho v absolutn\u00ed temnot\u011b. Demogorgon byl dokonal\u00fd. <\/p>\n

Druh\u00e1 \u010d\u00e1st jm\u00e9na, arcanus<\/em>, poch\u00e1z\u00ed z latiny. Znamen\u00e1 \u201eskryt\u00fd\u201c nebo \u201etajemn\u00fd\u201c.<\/p>\n

To je docela pravda. V\u011bdci vid\u011bli najednou jen asi 20 jedinc\u016f t\u00e9to ryby. Neskr\u00fdvaj\u00ed se ze zlomyslnosti. Skr\u00fdvaj\u00ed se, proto\u017ee ekosyst\u00e9m je mal\u00fd a sam\u00fdch je m\u00e1lo. <\/p>\n

\u201eMo\u017en\u00e1 \u017eila v ni\u017e\u0161\u00edch \u010d\u00e1stech zvodn\u011bl\u00e9 vrstvy a ned\u00e1vno se p\u0159est\u011bhovala,\u201c vysv\u011btluje Armbruster logistickou z\u00e1hadu. “Nebo tam mohl b\u00fdt nav\u017edy a my jsme si toho nikdy nev\u0161imli. Tunely jsou \u00fazk\u00e9, viditelnost nulov\u00e1.” <\/p>\n

Imperativ ochrany<\/h3>\n

Objev d\u00e9monick\u00e9 jeskynn\u00ed ryby<\/strong> nen\u00ed jen v\u00edt\u011bzstv\u00edm taxonomie. Toto je varovn\u00fd \u0161t\u00edtek pro krasovou krajinu Alabamy. <\/p>\n

Tyto ekosyst\u00e9my jsou k\u0159ehk\u00e9. Voda, kter\u00e1 prosakuje v\u00e1pencem, je \u010dist\u00e1, ale n\u00e1chyln\u00e1 ke zne\u010di\u0161t\u011bn\u00ed, suchu a rozvoji. Jeskynn\u00ed kreveta Alabama je ji\u017e na pokraji vyhynut\u00ed. Nyn\u00ed v\u00edme, \u017ee jeskyn\u011b ukr\u00fdv\u00e1 i tuto geneticky unik\u00e1tn\u00ed slepou rybu. <\/p>\n

Chr\u00e1nit jeden druh znamen\u00e1 chr\u00e1nit jin\u00fd. Hydrologie, kter\u00e1 krm\u00ed krevety, krm\u00ed ryby. Po\u0161ko\u010fte vodonosnou vrstvu a oboj\u00ed zmiz\u00ed. \u017d\u00e1dn\u00e9 krevety. \u017d\u00e1dn\u00e9 d\u00e9monick\u00e9 jeskynn\u00ed ryby<\/strong>. Jen pr\u00e1zdn\u00e9 jeskyn\u011b. <\/p>\n

\n

“Stejn\u011b jako krevety v Alabam\u011b, biologov\u00e9 vid\u00ed tuto rybu jako dal\u0161\u00ed d\u016fvod k pos\u00edlen\u00ed \u00fasil\u00ed o ochranu v t\u011bchto jedine\u010dn\u00fdch ekosyst\u00e9mech.” <\/p>\n<\/blockquote>\n

Z\u0159\u00eddka najdeme nov\u00e9 druhy na dob\u0159e prozkouman\u00fdch m\u00edstech, jako je Alabama. Jeskyn\u011b Bobcat je zmapov\u00e1na. Je slavn\u00e1. Pro\u010d tedy tato ryba z\u016fstala dosud skryta? <\/p>\n

Mo\u017en\u00e1 je men\u0161\u00ed, ne\u017e jsme si mysleli. Mo\u017en\u00e1 je tajn\u011bj\u0161\u00ed. Nebo jsme to mo\u017en\u00e1 jen hledali ve \u0161patn\u00e9 vod\u011b. <\/p>\n

Jedna v\u011bc je jasn\u00e1. Temn\u00e1 voda jeskyn\u011b Bobcat je bohat\u0161\u00ed, ne\u017e jsme si mysleli. A pro druh, kter\u00fd nem\u00e1 o\u010di, je viditelnost v\u0161\u00edm.<\/p>\n","protected":false},"excerpt":{"rendered":"

Bobcat Cave nen\u00ed pro ty, kte\u0159\u00ed trp\u00ed klaustrofobi\u00ed. Tento v\u00e1pencov\u00fd syst\u00e9m, zastr\u010den\u00fd pobl\u00ed\u017e Huntsville v Alabam\u011b, je sotva 1 490 stop dlouh\u00fd, ale proch\u00e1z\u00ed \u00fazk\u00fdmi pr\u016fchody. Tady se nechod\u00ed, tady se plaz\u00ed. Zatopen\u00e9 tunely a bahnit\u00e9 cesty definuj\u00ed jedinou cestu vp\u0159ed. Jeskynn\u00ed pr\u016fzkumn\u00edci ji\u017e t\u00e9m\u011b\u0159 \u010dty\u0159icet let bedliv\u011b sleduj\u00ed jednoho k\u0159ehk\u00e9ho obyvatele \u2013 jeskynn\u00ed krevety […]<\/p>\n","protected":false},"author":1,"featured_media":7945,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"tdm_status":"","tdm_grid_status":""},"categories":[1],"tags":[],"wpm_language_slugs":{"cs":"demogorgonichtis-nejvzacnejsi-ryba-bez-oci-z-alabamskych-jeskyni","de":"demogorgonichthys-entdecken-der-seltenste-augenlose-fisch-der-in-den","en":"discovering-demogorgonichthys-the-rarest-eyeless-fish-found-in-alabama","es":"descubriendo-demogorgonichthys-el-pez-sin-ojos-mas-raro-encontrado","fr":"a-la-decouverte-de-demogorgonichthys-le-poisson-sans-yeux-le-plus-rare","id":"menemukan-demogorgonichthys-ikan-tanpa-mata-paling-langka-ditemukan-di","it":"alla-scoperta-del-demogorgonichthys-il-pesce-senza-occhi-piu-raro","nl":"demogorgonichthys-ontdekken-de-zeldzaamste-oogloze-vis-gevonden-in","pl":"demogorgonichtis-najrzadsza-bezoka-ryba-z-jaskin-alabamy","pt":"descobrindo-demogorgonichthys-o-peixe-sem-olhos-mais-raro-encontrado","ru-ru":"demogorgonichtis-samaja-redkaja-besglazaja-ryba-iz-pescher-alabamy","uk-ua":"demogorgonichtis-najridkisnisha-bezoka-riba-z-pecher-alabami"},"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/www.schooler.org.ua\/cs\/wp-json\/wp\/v2\/posts\/7946"}],"collection":[{"href":"https:\/\/www.schooler.org.ua\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.schooler.org.ua\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.schooler.org.ua\/cs\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.schooler.org.ua\/cs\/wp-json\/wp\/v2\/comments?post=7946"}],"version-history":[{"count":0,"href":"https:\/\/www.schooler.org.ua\/cs\/wp-json\/wp\/v2\/posts\/7946\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.schooler.org.ua\/cs\/wp-json\/wp\/v2\/media\/7945"}],"wp:attachment":[{"href":"https:\/\/www.schooler.org.ua\/cs\/wp-json\/wp\/v2\/media?parent=7946"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.schooler.org.ua\/cs\/wp-json\/wp\/v2\/categories?post=7946"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.schooler.org.ua\/cs\/wp-json\/wp\/v2\/tags?post=7946"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}