[{"@context":"https:\/\/schema.org\/","@type":"Article","@id":"https:\/\/www.sammarkiewi.cz\/historie-zelv\/#Article","mainEntityOfPage":"https:\/\/www.sammarkiewi.cz\/historie-zelv\/","headline":"Historie \u017eelv","name":"Historie \u017eelv","description":"V dob\u00e1ch evoluce pat\u0159ily \u017eelvy k druh\u016fm, kter\u00e9 se b\u011bhem sv\u00e9ho v\u00fdvoje \u010d\u00e1ste\u010dn\u011b dostaly z vody a tam a zp\u011bt mezi pevninou a mo\u0159em. V\u00fdhradn\u011b mo\u0159sk\u00e9 \u017eelvy vyhynuly asi p\u0159ed 200 miliony let, ale stopy \u017eelv, jak je zn\u00e1me, z\u016fstaly. B\u011bhem obdob\u00ed triasu vid\u00edme, \u017ee t\u011blo \u017eelvy nab\u00fdv\u00e1 sv\u00e9 zn\u00e1m\u00e9 podoby. Od t\u00e9to chv\u00edle z\u016fst\u00e1v\u00e1 […]","datePublished":"2022-08-16","dateModified":"2023-05-05","author":{"@type":"Person","@id":"https:\/\/www.sammarkiewi.cz\/author\/#Person","name":"sammarkiewi.cz\n","url":"https:\/\/www.sammarkiewi.cz\/author\/","identifier":1,"image":{"@type":"ImageObject","@id":"https:\/\/secure.gravatar.com\/avatar\/64d58fab86512053c8bb518a6563e7284bb4a3422dc9af0106c3f39575364c7b?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/64d58fab86512053c8bb518a6563e7284bb4a3422dc9af0106c3f39575364c7b?s=96&d=mm&r=g","height":96,"width":96}},"publisher":{"@type":"Organization","name":"sammarkiewi.cz","logo":{"@type":"ImageObject","@id":"\/logo.png","url":"\/logo.png","width":600,"height":60}},"image":{"@type":"ImageObject","@id":"https:\/\/www.sammarkiewi.cz\/wp-content\/uploads\/sea-2361247_960_720.jpg","url":"https:\/\/www.sammarkiewi.cz\/wp-content\/uploads\/sea-2361247_960_720.jpg","height":0,"width":0},"url":"https:\/\/www.sammarkiewi.cz\/historie-zelv\/","about":["Zv\u00ed\u0159ata"],"wordCount":528,"articleBody":"V dob\u00e1ch evoluce pat\u0159ily \u017eelvy k druh\u016fm, kter\u00e9 se b\u011bhem sv\u00e9ho v\u00fdvoje \u010d\u00e1ste\u010dn\u011b dostaly z vody a tam a zp\u011bt mezi pevninou a mo\u0159em. V\u00fdhradn\u011b mo\u0159sk\u00e9 \u017eelvy vyhynuly asi p\u0159ed 200 miliony let, ale stopy \u017eelv, jak je zn\u00e1me, z\u016fstaly. B\u011bhem obdob\u00ed triasu vid\u00edme, \u017ee t\u011blo \u017eelvy nab\u00fdv\u00e1 sv\u00e9 zn\u00e1m\u00e9 podoby. Od t\u00e9to chv\u00edle z\u016fst\u00e1v\u00e1 t\u011blo prakticky nezm\u011bn\u011bno.P\u0159esto\u017ee v\u00fdvoj \u017eelvy m\u016f\u017ee b\u00fdt snadno sledovateln\u00fd, na rozd\u00edl nap\u0159\u00edklad od hada zde st\u00e1le chyb\u00ed \u010dl\u00e1nky a o\u010dek\u00e1van\u00fd gigantismus v\u011bt\u0161iny prav\u011bk\u00fdch zv\u00ed\u0159at b\u011bhem druhohor. Dok\u00e1\u017eete si p\u0159edstavit, \u017ee se kolem potuluje obrovsk\u00e1 \u017eelva a \u017eere stejn\u011b ob\u0159\u00ed rostliny? Zd\u00e1 se, \u017ee paleontologov\u00e9 nemohou p\u0159esn\u011b ur\u010dit prehistorickou rodinu, ze kter\u00e9 se vyvinuly modern\u00ed \u017eelvy, ale mohou s jistotou \u0159\u00edci, \u017ee to nebyli plakodonti, jak se d\u0159\u00edve uva\u017eovalo.Historicky m\u011bly \u017eelvy vliv na ur\u010dit\u00e1 n\u00e1bo\u017eenstv\u00ed. V hinduismu je Vi\u0161nu nap\u016fl \u010dlov\u011bk, nap\u016fl \u017eelva a sed\u011bl na dn\u011b oce\u00e1nsk\u00e9ho dna po velk\u00e9 m\u00fdtick\u00e9 potop\u011b. Ve starov\u011bk\u00e9m \u0158ecku je \u017eelva symbolem \u0159eck\u00e9ho boha Herma. Ve starov\u011bk\u00e9 \u010c\u00edn\u011b se k p\u0159edpov\u011bdi pou\u017e\u00edvaly \u017eelv\u00ed krun\u00fd\u0159e.Dnes m\u016f\u017eete naj\u00edt \u017eelvy \u017eij\u00edc\u00ed v r\u016fzn\u00fdch \u010d\u00e1stech sv\u011bta, dor\u016fstaj\u00edc\u00ed do r\u016fzn\u00fdch velikost\u00ed a vykazuj\u00edc\u00ed r\u016fzn\u00e9 barvy a vzory. Galap\u00e1gy jsou domovem ob\u0159\u00edch \u017eelv a \u00fadajn\u011b se tam dostaly asi p\u0159ed 3 miliony let. Jednou z nejp\u016fsobiv\u011bj\u0161\u00edch v\u011bc\u00ed na t\u011bchto \u017eelv\u00e1ch je jejich schopnost p\u0159e\u017e\u00edt bez j\u00eddla a vody a\u017e rok. Bohu\u017eel to nemohlo zachr\u00e1nit v\u011bt\u0161inu populace p\u0159ed t\u00e9m\u011b\u0159 vyhynut\u00edm. Velryb\u00e1\u0159i a bukan\u00fd\u0159i je skladovali jako potravu na dlouh\u00fdch plavb\u00e1ch a pou\u017e\u00edvali je jako olej k rozsv\u00edcen\u00ed lamp. Dnes \u017eije na ostrovech jen asi 25 000 divok\u00fdch \u017eelv. Na\u0161t\u011bst\u00ed existuj\u00ed snahy o ochranu t\u011bchto b\u00fdlo\u017eravc\u016f p\u0159ed lidsk\u00fdmi z\u00e1sahy a dal\u0161\u00edmi faktory, kter\u00e9 p\u0159isp\u011bly k jejich \u00fabytku.\u00a0Lid\u00e9 maj\u00ed obecn\u011b r\u00e1di \u017eelvy. Mnoz\u00ed je pova\u017euj\u00ed za dokonal\u00e9ho mazl\u00ed\u010dka, proto\u017ee jsou relativn\u011b nen\u00e1ro\u010dn\u00e9 na \u00fadr\u017ebu. V zim\u011b se ukl\u00e1daj\u00ed k zimn\u00edmu sp\u00e1nku a\u017e kolem dubna, jed\u00ed pravidelnou a jednoduchou stravu a vlastn\u011b nepot\u0159ebuj\u00ed \u017e\u00e1dn\u00fd tr\u00e9nink ani proch\u00e1zky. P\u00e9\u010de o \u017eelvu je obvykle kladena d\u016frazem na spr\u00e1vn\u00e9 prost\u0159ed\u00ed a stravu. Bylo pozorov\u00e1no, \u017ee si u\u017e\u00edvaj\u00ed lidsk\u00e9ho kontaktu, i kdy\u017e to nejsou p\u0159\u00edli\u0161 spole\u010densk\u00e1 zv\u00ed\u0159ata. Pokud jsou dr\u017eeny s jin\u00fdmi \u017eelvami, mohou b\u00fdt agresivn\u00ed, ale ne s \u017e\u00e1dn\u00fdmi v\u00e1\u017en\u00fdmi zran\u011bn\u00edmi. R\u00e1di se hrabou a budou se sna\u017eit podhrabat se pod jakoukoliv z\u00eddkou nebo plotem, tak\u017ee si ka\u017ed\u00fd v\u00fdb\u011bh zajist\u011bte.                                                                                                                                                                                                                                                                                                                                                                                        3.9\/5 - (13 votes)        "},{"@context":"https:\/\/schema.org\/","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Historie \u017eelv","item":"https:\/\/www.sammarkiewi.cz\/historie-zelv\/#breadcrumbitem"}]}]