[{"@context":"https:\/\/schema.org\/","@type":"Article","@id":"https:\/\/www.souk.cz\/jak-se-kytovci-vratili-zpet-do-more\/#Article","mainEntityOfPage":"https:\/\/www.souk.cz\/jak-se-kytovci-vratili-zpet-do-more\/","headline":"Jak se kytovci vr\u00e1tili zp\u011bt do mo\u0159e","name":"Jak se kytovci vr\u00e1tili zp\u011bt do mo\u0159e","description":"Asi ka\u017ed\u00fd v\u00ed, \u017ee velryby pat\u0159\u00ed mezi nejv\u011bt\u0161\u00ed \u017eivo\u010dichy v\u016fbec. Ty nejv\u011bt\u0161\u00ed, nap\u0159\u00edklad plejtv\u00e1k obrovsk\u00fd, […]","datePublished":"2023-01-27","dateModified":"2023-07-27","author":{"@type":"Person","@id":"https:\/\/www.souk.cz\/author\/#Person","name":"","url":"https:\/\/www.souk.cz\/author\/","identifier":1,"image":{"@type":"ImageObject","@id":"https:\/\/secure.gravatar.com\/avatar\/59b0e4716b6bc16861d789b0eb3efe04cb591482277f92a016ec4356fe735210?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/59b0e4716b6bc16861d789b0eb3efe04cb591482277f92a016ec4356fe735210?s=96&d=mm&r=g","height":96,"width":96}},"publisher":{"@type":"Organization","name":"souk.cz","logo":{"@type":"ImageObject","@id":"\/logo.png","url":"\/logo.png","width":600,"height":60}},"image":{"@type":"ImageObject","@id":"https:\/\/www.souk.cz\/wp-content\/uploads\/kytovci1.jpg","url":"https:\/\/www.souk.cz\/wp-content\/uploads\/kytovci1.jpg","height":0,"width":0},"url":"https:\/\/www.souk.cz\/jak-se-kytovci-vratili-zpet-do-more\/","about":["V\u011bda"],"wordCount":454,"articleBody":"Asi ka\u017ed\u00fd v\u00ed, \u017ee velryby pat\u0159\u00ed mezi nejv\u011bt\u0161\u00ed \u017eivo\u010dichy v\u016fbec. Ty nejv\u011bt\u0161\u00ed, nap\u0159\u00edklad plejtv\u00e1k obrovsk\u00fd, by na sou\u0161i nep\u0159e\u017eily, nebo\u0165 by se zhroutili vahou vlastn\u00edho t\u011bla, kter\u00e9 jim voda pom\u00e1h\u00e1 nadn\u00e1\u0161et. P\u0159itom tato ob\u0159\u00ed zv\u00ed\u0159ata za\u010dala svou cestu pom\u011brn\u011b nen\u00e1padn\u011b. O to pozoruhodn\u011bj\u0161\u00ed v\u0161ak byla.\u00a0Jak v\u0161ichni v\u00edme, kytovci pat\u0159\u00ed mezi savce. Ti se objevili poprv\u00e9 v\u00a0druhohor\u00e1ch, coby mal\u00ed \u017eivo\u010dichov\u00e9 ne nepodobn\u00ed dne\u0161n\u00edm hlodavc\u016fm. Oproti dinosaur\u016fm m\u011bli v\u00fdhodu v\u00a0tom, \u017ee rodili \u017eiv\u00e1 ml\u00e1\u010fata a tak\u00e9 lep\u0161\u00ed termoregula\u010dn\u00ed syst\u00e9m, d\u00edky kter\u00e9mu byli mnohem aktivn\u011bj\u0161\u00ed a pohybliv\u011bj\u0161\u00ed.\u00a0\u00a0P\u0159esto jejich \u010das nastal teprve pot\u00e9, co v\u011bt\u0161ina dinosaur\u016f zmizela z\u00a0povrchu zemsk\u00e9ho. Tehdy se rychle objevila \u0161irok\u00e1 \u0161k\u00e1la nejr\u016fzn\u011bj\u0161\u00edch druh\u016f, kter\u00e9 zaplnily upr\u00e1zdn\u011bn\u00e9 ekologick\u00e9 niky. A jedn\u00edm z\u00a0nich bylo i zv\u00ed\u0159e podobn\u00e9 dne\u0161n\u00edmu psu, \u017eij\u00edc\u00ed pobl\u00ed\u017e pob\u0159e\u017e\u00ed.\u00a0Vzhledem k\u00a0nedostatku potravy se tito za\u010dali specializovat na chyt\u00e1n\u00ed ryb, kter\u00fdch bylo p\u0159eci jen v\u00edce. A jak tr\u00e1vili st\u00e1le v\u00edce \u010dasu ve vod\u011b, zm\u011bnilo se i jejich t\u011blo. Stalo se v\u00edce aerodynamick\u00fdm, kon\u010detiny se postupn\u011b zm\u011bnily v\u00a0ploutve. Srst, kter\u00e1 p\u0159i pohybu ve vod\u011b sp\u00ed\u0161e p\u0159ek\u00e1\u017eela, zmizela. Nakonec tato zv\u00ed\u0159ata p\u0159estala chodit na pevninu \u00fapln\u011b.\u00a0\u00a0V\u00a0dal\u0161\u00edm obdob\u00ed se t\u011blo d\u00e1le m\u011bnilo. \u010cum\u00e1k se prodlou\u017eil, zm\u011bnily se i zuby. V\u00a0t\u00e9 dob\u011b se tak\u00e9 za\u010dali rozd\u011blovat na r\u016fzn\u00e9 druhy kytovc\u016f, jak je zn\u00e1me dnes. N\u011bkte\u0159\u00ed, \u017eij\u00edc\u00ed v\u00a0m\u00edstech s\u00a0nedostatkem jin\u00e9 potravy, se za\u010dali specializovat na poj\u00edd\u00e1n\u00ed planktonu, kter\u00e9ho byl dostatek. Vzhledem k\u00a0tomu, \u017ee se tak mohli krmit v\u00a0podstat\u011b neust\u00e1le, mohli nar\u016fst do ob\u0159\u00ed velikosti, kter\u00e1 je z\u00e1rove\u0148 chr\u00e1nila p\u0159ed pred\u00e1tory. Mohli si to dovolit tak\u00e9 proto, \u017ee se nepot\u0159ebovali pohybovat rychle.\u00a0Jin\u00ed naopak z\u016fstali u lovu ryb. V\u011bt\u0161inu z\u00a0nich zn\u00e1me jako delf\u00edny. Ti jsou \u0161t\u00edhlej\u0161\u00ed a rychlej\u0161\u00ed, nebo\u0165 jejich ko\u0159ist m\u016f\u017ee snadno uniknout. Proto tak\u00e9 \u010dasto lov\u00ed ve skupin\u00e1ch, podobn\u011b jako dne\u0161n\u00ed psovit\u00ed, kter\u00fdm se kdysi podobali.\u00a0Kytovci jsou jedn\u00edm z\u00a0m\u00e1la druh\u016f, kter\u00fd se vr\u00e1til ze sou\u0161e do mo\u0159e. A je pot\u0159eba \u0159\u00edci, \u017ee jsou tam jedn\u00edm z\u00a0nej\u00fasp\u011b\u0161n\u011bj\u0161\u00edch. A zd\u00e1 se, \u017ee tomu tak bude i nad\u00e1le.                                                                                                                                                                                                                                                                                                                                                                                        4.7\/5 - (11 votes)        "},{"@context":"https:\/\/schema.org\/","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Jak se kytovci vr\u00e1tili zp\u011bt do mo\u0159e","item":"https:\/\/www.souk.cz\/jak-se-kytovci-vratili-zpet-do-more\/#breadcrumbitem"}]}]