[{"@context":"https:\/\/schema.org\/","@type":"Article","@id":"https:\/\/www.djuna.cz\/tucnak-cisarsky-dokonaly-potapec\/#Article","mainEntityOfPage":"https:\/\/www.djuna.cz\/tucnak-cisarsky-dokonaly-potapec\/","headline":"Tu\u010d\u0148\u00e1k c\u00edsa\u0159sk\u00fd \u2013 dokonal\u00fd pot\u00e1p\u011b\u010d","name":"Tu\u010d\u0148\u00e1k c\u00edsa\u0159sk\u00fd \u2013 dokonal\u00fd pot\u00e1p\u011b\u010d","description":"V\u011bdci z N\u00e1rodn\u00ed v\u011bdeck\u00e9 nadace USA, podrobn\u011b studuj\u00ed v Antarktid\u011b fyziologii tu\u010d\u0148\u00e1k\u016f c\u00edsa\u0159sk\u00fdch, proto\u017ee tito pt\u00e1ci se um\u00ed potopit neuv\u011b\u0159iteln\u011b hluboko a to a\u017e 300 metr\u016f. Dok\u00e1\u017e\u00ed tak\u00e9 upoutat svou v\u00fd\u0161kou, kter\u00e1 je 122cm a v\u00e1ha je 22 a\u017e 45 kg. Lov\u00ed v\u011bt\u0161inou ryby, kor\u00fd\u0161e a hlavono\u017ece. Pod vodou dok\u00e1\u017eou b\u00fdt a\u017e 18 minut. Jsou...<p class=\"more-link-wrap\"><a href=\"https:\/\/www.djuna.cz\/tucnak-cisarsky-dokonaly-potapec\/\" class=\"more-link\">P\u0159e\u010d\u00edst<span class=\"screen-reader-text\"> &ldquo;Tu\u010d\u0148\u00e1k c\u00edsa\u0159sk\u00fd \u2013 dokonal\u00fd pot\u00e1p\u011b\u010d&rdquo;<\/span> &raquo;<\/a><\/p>","datePublished":"2017-10-14","dateModified":"2023-04-27","author":{"@type":"Person","@id":"https:\/\/www.djuna.cz\/author\/#Person","name":"","url":"https:\/\/www.djuna.cz\/author\/","identifier":1,"image":{"@type":"ImageObject","@id":"https:\/\/secure.gravatar.com\/avatar\/1e120f96477763896a9e7ab3663c076bf8b67ca32fa1a5943b70761da502a7a7?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/1e120f96477763896a9e7ab3663c076bf8b67ca32fa1a5943b70761da502a7a7?s=96&d=mm&r=g","height":96,"width":96}},"publisher":{"@type":"Organization","name":"djuna.cz","logo":{"@type":"ImageObject","@id":"\/logo.png","url":"\/logo.png","width":600,"height":60}},"image":{"@type":"ImageObject","@id":"https:\/\/www.djuna.cz\/wp-content\/uploads\/img_a303116_w2043_t1513282309.jpg","url":"https:\/\/www.djuna.cz\/wp-content\/uploads\/img_a303116_w2043_t1513282309.jpg","height":0,"width":0},"url":"https:\/\/www.djuna.cz\/tucnak-cisarsky-dokonaly-potapec\/","wordCount":398,"articleBody":"V\u011bdci z N\u00e1rodn\u00ed v\u011bdeck\u00e9 nadace USA, podrobn\u011b studuj\u00ed v Antarktid\u011b fyziologii tu\u010d\u0148\u00e1k\u016f c\u00edsa\u0159sk\u00fdch, proto\u017ee tito pt\u00e1ci se um\u00ed potopit neuv\u011b\u0159iteln\u011b hluboko a to a\u017e 300 metr\u016f. Dok\u00e1\u017e\u00ed tak\u00e9 upoutat svou v\u00fd\u0161kou, kter\u00e1 je 122cm a v\u00e1ha je 22 a\u017e 45 kg. Lov\u00ed v\u011bt\u0161inou ryby, kor\u00fd\u0161e a hlavono\u017ece. Pod vodou dok\u00e1\u017eou b\u00fdt a\u017e 18 minut. Jsou tak\u00e9 zdatn\u00ed plavci. Pr\u016fm\u011brn\u011b p\u0159i plav\u00e1n\u00ed dosahuj\u00ed rychlosti 6-9km\/h. Potravu hledaj\u00ed v oce\u00e1nu, bu\u010f v otev\u0159en\u00fdch vod\u00e1ch nebo prasklin\u00e1ch ledovc\u016f. Pono\u0159\u00ed se do hloubky okolo 50 metr\u016f, kde naleznou ryby plovouc\u00ed pod ledovcem.Tu\u010d\u0148\u00e1k c\u00edsa\u0159sk\u00fd je zn\u00e1m sv\u00fdmi cestami, kter\u00e9 ka\u017ed\u00fd rok uskute\u010dn\u00ed kv\u016fli p\u00e1\u0159en\u00ed a krmen\u00ed ml\u00e1\u010fat. Velk\u00e9 skupiny jedinc\u016f, kter\u00fdch m\u016f\u017ee b\u00fdt a\u017e tis\u00edce, cestuj\u00ed 100 a\u017e 160 km. Je to jedin\u00fd druh tu\u010d\u0148\u00e1ka, kter\u00fd se rozmno\u017euje b\u011bhem antarktick\u00e9 zimy. Maj\u00ed tak\u00e9 netradi\u010dn\u011b rozd\u011blen\u00e9 rodi\u010dovsk\u00e9 povinnosti.Na konci podzimu snese samice jedno vaj\u00ed\u010dko, kter\u00e9 p\u0159ed\u00e1 samci, a sama putuje k mo\u0159sk\u00e9mu pob\u0159e\u017e\u00ed za potravou. Samec zasune vejce do zvl\u00e1\u0161tn\u00ed kapsy na b\u0159i\u0161e, nad nohou a zah\u0159\u00edv\u00e1 ho. Brzy na ja\u0159e se ml\u00e1d\u011b vyl\u00edhne, zrovna kdy\u017e se vrac\u00ed samice. Pot\u00e9 se hladov\u00fd samec vyd\u00e1v\u00e1 na pob\u0159e\u017e\u00ed, kde se nasyt\u00ed.Bohu\u017eel tu\u010d\u0148\u00e1k c\u00edsa\u0159sk\u00fd pat\u0159\u00ed t\u00e9m\u011b\u0159 do ohro\u017een\u00e9ho druhu.Hlavn\u00edm d\u016fvodem toho je \u00fadajn\u011b ub\u00fdv\u00e1n\u00ed dostupnosti potravy, kv\u016fli klimatick\u00fdm zm\u011bn\u00e1m a pr\u016fmyslov\u00e9ho rybolovu.Do konce stolet\u00ed, studie p\u0159edpokl\u00e1d\u00e1 vyhynut\u00ed 40 a\u017e 90 procent ve\u0161ker\u00e9 populace toho druhu tu\u010d\u0148\u00e1k\u016f. Ob\u010das p\u0159\u00edroda p\u0159elst\u00ed v\u011bdu a tak situace nemus\u00ed b\u00fdt a\u017e tak tragick\u00e1. V minulosti, u\u017e toti\u017e dok\u00e1zala p\u0159elst\u00edt p\u0159edpov\u011bdi biolog\u016f i ochr\u00e1nc\u016f \u017eivotn\u00edho prost\u0159ed\u00ed.Nap\u0159\u00edklad v roce 2012 v\u00fdzkumn\u00edci zjistili, \u017ee v Antarktid\u011b \u017eije dvakr\u00e1t v\u00edc tu\u010d\u0148\u00e1k\u016f c\u00edsa\u0159sk\u00fdch ne\u017e se do t\u00e9 doby v\u011bd\u011blo. S\u010d\u00edt\u00e1n\u00ed t\u011bchto tvor\u016f je toti\u017e slo\u017eit\u00e9. Pou\u017e\u00edvaj\u00ed se automatick\u00e9 kamery u hn\u00edzdi\u0161\u0165, krou\u017ekov\u00e1n\u00ed nebo tak\u00e9 leteck\u00e9 sn\u00edmkov\u00e1n\u00ed. V\u011bt\u0161\u00ed nep\u0159esnosti jsou tak pochopiteln\u00e9.                                                                                                                                                                                                                                                                                                                                                                                                "},{"@context":"https:\/\/schema.org\/","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Tu\u010d\u0148\u00e1k c\u00edsa\u0159sk\u00fd \u2013 dokonal\u00fd pot\u00e1p\u011b\u010d","item":"https:\/\/www.djuna.cz\/tucnak-cisarsky-dokonaly-potapec\/#breadcrumbitem"}]}]