Ne\u010dakan\u00fd poh\u013ead sa naskytol vedcom z austr\u00e1lskej univerzity, ktor\u00ed vykon\u00e1vali v\u00fdskum podmorsk\u00e9ho \u017eivota v hlbin\u00e1ch mora v Antarkt\u00edde. Nad hol\u00fdm morsk\u00fdm dnom v pr\u00edli\u0161 ve\u013ekej h\u013abke, aby sem prenikali slne\u010dn\u00e9 l\u00fa\u010de, sa lenivo \u0161inul mohutn\u00fd \u017eralok. Vedci sa pritom a\u017e doteraz domnievali, \u017ee v chladn\u00fdch vod\u00e1ch Antarkt\u00eddy \u017eraloky ne\u017eij\u00fa, nap\u00edsala agent\u00fara AP.<\/p>\n
\u017dralok antarktick\u00fd, ktor\u00fd dosahoval d\u013a\u017eku troch a\u017e \u0161tyroch metrov, sa kr\u00e1tko objavil na z\u00e1zname, ktor\u00fd sa vedcom podarilo nato\u010di\u0165 v janu\u00e1ri 2025, povedal AP Alan Jamieson z Univerzity Z\u00e1padnej Austr\u00e1lie (UWA). „Ke\u010f sme tam dole spustili kameru, ne\u010dakali sme, \u017ee uvid\u00edme \u017eraloka, preto\u017ee v\u0161eobecne prij\u00edman\u00e9 pravidlo hovor\u00ed, \u017ee \u017eraloky v Antarkt\u00edde ne\u017eij\u00fa,“ povedal Jamieson. „A navy\u0161e to nebol \u017eiadny drob\u010dek. Bol to poriadny kus. Tieto \u017eraloky s\u00fa ako tank,“ dodal.<\/p>\n
Kameru spustilo na dno Stredisko hlbokomorsk\u00e9ho v\u00fdskumu Minderoo-UWA, ktor\u00e9 sk\u00fama \u017eivot v najhlb\u0161\u00edch \u010dastiach svetov\u00fdch oce\u00e1nov. Umiestnilo ju pri s\u00faostrov\u00ed Ju\u017en\u00e9 Shetlandy bl\u00edzko Antarktick\u00e9ho polostrova. To je hlboko vo vn\u00fatri hran\u00edc Ju\u017en\u00e9ho oce\u00e1nu, ktor\u00fd je definovan\u00fd ako oblas\u0165 pod 60. stup\u0148om ju\u017enej \u0161\u00edrky, p\u00ed\u0161e AP.<\/p>\n
\u017dralok sa pohyboval v h\u013abke 490 metrov, kde je teplota vody s hodnotou 1,27 stup\u0148a Celzia len k\u00fasok od bodu mrazu. Na z\u00e1beroch kamery je vidie\u0165 raja, ktor\u00e1 le\u017e\u00ed nehybne na morskom dne a zd\u00e1 sa, \u017ee ju \u017eralok pl\u00e1vaj\u00faci okolo nijako nevyru\u0161uje. Raja pre vedcov nebola \u017eiadnym prekvapen\u00edm, preto\u017ee u\u017e vedeli, \u017ee sa vyskytuje tak \u010faleko na juhu.<\/p>\n
Jamieson, ktor\u00fd je zakladaj\u00facim riadite\u013eom v\u00fdskumn\u00e9ho strediska Minderoo pri UWA, agent\u00fare AP povedal, \u017ee sa mu nepodarilo n\u00e1js\u0165 \u017eiadny z\u00e1znam o inom \u017eralokovi vyskytuj\u00facom sa v Ju\u017enom oce\u00e1ne.<\/p>\n
Aj Peter Kyne, biol\u00f3g z austr\u00e1lskej Univerzity Charlesa Darwina, ktor\u00fd sa na v\u00fdskume nepodie\u013eal, s\u00fahlas\u00ed, \u017ee tak \u010faleko na juhu nebol nikdy \u017eiadny \u017eralok zaznamenan\u00fd. Klimatick\u00e9 zmeny a otep\u013eovanie oce\u00e1nov by mohli potenci\u00e1lne \u017eraloky hna\u0165 do chladnej\u0161\u00edch v\u00f4d ju\u017enej pologule, ale kv\u00f4li od\u013eahlosti tejto oblasti s\u00fa dostupn\u00e9 \u00fadaje len ve\u013emi obmedzen\u00e9, povedal Kyne. Pomaly sa pohybuj\u00face \u017eraloky m\u00f4\u017eu by\u0165 v Antarkt\u00edde dlho bez toho, aby si to niekto v\u0161imol, dodal.<\/p>\n
\u017dralok , ktor\u00e9ho sa vedcom podarilo nato\u010di\u0165, sa pohyboval v h\u013abke okolo 500 metrov pozd\u013a\u017e morsk\u00e9ho dna, ktor\u00e9 sa zva\u017eovalo do ove\u013ea hlb\u0161\u00edch v\u00f4d. Zdr\u017eiaval sa v najteplej\u0161ej vrstve vody, uviedol Jamieson.<\/p>\n
Ju\u017en\u00fd oce\u00e1n je silne vrstven\u00fd, \u010di\u017ee stratifikovan\u00fd, do h\u013abky asi 1000 metrov, preto\u017ee jednotliv\u00e9 vrstvy vody tu maj\u00fa rozdielne vlastnosti vr\u00e1tane odli\u0161nej hustoty, a preto sa pr\u00edli\u0161 \u013eahko nemie\u0161aj\u00fa. Pod\u013ea Jamiesona v tejto oblasti v\u0161etky \u017eraloky zrejme \u017eij\u00fa v rovnakej h\u013abke a \u017eivia sa mr\u0161inami ve\u013er\u00fdb, obrovsk\u00fdch chobotn\u00edc a \u010fal\u0161\u00edch morsk\u00fdch tvorov, ktor\u00e9 uhynuli a klesli na dno.<\/p>\n
V antarktick\u00fdch vod\u00e1ch je v tejto konkr\u00e9tnej h\u013abke umiestnen\u00fdch len nieko\u013eko v\u00fdskumn\u00fdch kamier. Tie, ktor\u00e9 tam s\u00fa, m\u00f4\u017eu fungova\u0165 iba po\u010das letn\u00fdch mesiacov na ju\u017enej pologuli, teda od decembra do febru\u00e1ra. „Zvy\u0161n\u00fdch 75 percent roka sa tam nikto nepozer\u00e1. A preto ob\u010das naraz\u00edme na podobn\u00e9 prekvapenie,“ dodal Jamieson.<\/p>\n","protected":false},"excerpt":{"rendered":"Ne\u010dakan\u00fd poh\u013ead sa naskytol vedcom z austr\u00e1lskej univerzity, ktor\u00ed vykon\u00e1vali v\u00fdskum podmorsk\u00e9ho \u017eivota v hlbin\u00e1ch mora v Antarkt\u00edde.…\n","protected":false},"author":2,"featured_media":24511,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8],"tags":[11641,11639,11636,11642,11637,11638,11635,6902,11645,11640,33,11646,43,40,42,36,50,11647,11644,11648,49,48,11643],"class_list":{"0":"post-24510","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-svet","8":"tag-alan-jamieson","9":"tag-antarkticky-polostrov","10":"tag-antarktida","11":"tag-hlbokomorsky-vyskum","12":"tag-juzne-shetlandy","13":"tag-juzny-ocean","14":"tag-klimaticke-zmeny","15":"tag-melbourne","16":"tag-minderoo-uwa","17":"tag-morska-biologia","18":"tag-news","19":"tag-peter-kyne","20":"tag-sk","21":"tag-slovak","22":"tag-slovencina","23":"tag-spravy","24":"tag-svet","25":"tag-univerzita-charlesa-darwina","26":"tag-univerzita-zapadnej-australie","27":"tag-vedny-objav","28":"tag-world","29":"tag-world-news","30":"tag-zralok-svetluk-antarkticky"},"share_on_mastodon":{"url":"https:\/\/pubeurope.com\/@sk\/116267927542292859","error":""},"_links":{"self":[{"href":"https:\/\/www.europesays.com\/sk\/wp-json\/wp\/v2\/posts\/24510","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.europesays.com\/sk\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.europesays.com\/sk\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/sk\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/sk\/wp-json\/wp\/v2\/comments?post=24510"}],"version-history":[{"count":0,"href":"https:\/\/www.europesays.com\/sk\/wp-json\/wp\/v2\/posts\/24510\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/sk\/wp-json\/wp\/v2\/media\/24511"}],"wp:attachment":[{"href":"https:\/\/www.europesays.com\/sk\/wp-json\/wp\/v2\/media?parent=24510"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.europesays.com\/sk\/wp-json\/wp\/v2\/categories?post=24510"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.europesays.com\/sk\/wp-json\/wp\/v2\/tags?post=24510"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}