{"id":322748,"date":"2024-02-24T17:57:44","date_gmt":"2024-02-24T16:57:44","guid":{"rendered":"https:\/\/liked.hu\/old\/?p=322748"},"modified":"2024-02-24T17:57:46","modified_gmt":"2024-02-24T16:57:46","slug":"narval-miert-van-egy-hatalmas-agyar-ennek-a-balnanak-az-orran","status":"publish","type":"post","link":"https:\/\/liked.hu\/old\/allatok\/narval-miert-van-egy-hatalmas-agyar-ennek-a-balnanak-az-orran\/","title":{"rendered":"Narv\u00e1l: mi\u00e9rt van egy hatalmas agyar ennek a b\u00e1ln\u00e1nak az orr\u00e1n?"},"content":{"rendered":"\n<p>A narv\u00e1l, vagy m\u00e1s n\u00e9ven tengeri unikornis, a legmisztikusabb \u00e9l\u0151l\u00e9nyek egyike. Ugyanolyan legend\u00e1k \u00f6vezik, mint a sz\u00e1razf\u00f6ldi unikornisokat, de van egy l\u00e9nyeges k\u00fcl\u00f6nbs\u00e9g: a narv\u00e1lok val\u00f3ban l\u00e9teznek!<\/p>\n\n\n\n\n<div style=\"float:none;margin:0px 0 0px 0;text-align:center;\">\n<div class=\"mobileShowkakettes\"><div class=\"mobileShowka2\"><div style=\"padding-top:0px;padding-bottom:15px;min-height: 300px;\"><div class=\"hirdetes\">HIRDET\u00c9S<\/div>\n<!-- 300lista -->\n<ins class=\"adsbygoogle\"\n     style=\"display:inline-block;width:300px;height:250px\"\n     data-ad-client=\"ca-pub-9424088931673893\"\n     data-ad-slot=\"8471340766\"><\/ins>\n<script async>\n     (adsbygoogle = window.adsbygoogle || []).push({});\n<\/script><\/div><\/div><\/div><\/div>\n\n\n\n\n<p>Persze, a m\u00edtoszok \u00e9s legend\u00e1k itt is b\u0151ven akadnak. M\u00e1r csak a hatalmas agyaruk is megannyi rejt\u00e9lyt tartogat. Vajon mire haszn\u00e1lj\u00e1k a narv\u00e1lok? A tud\u00f3sok m\u00e9g ma sem tudj\u00e1k pontosan.<\/p>\n\n\n\n<div class=\"wp-block-buzzeditor-list be-list be-list-type-none be-list-number-style-none\">\n<div class=\"wp-block-buzzeditor-list-item\"><h3 class=\"be-list-item-title\"> <\/h3>\n<figure class=\"wp-block-image size-full\"><img src=\"https:\/\/nebazz.com\/wp-content\/uploads\/2024\/02\/Narval-szarv-erdekessegek-011.webp\" alt=\"\" class=\"wp-image-50\"\/><\/figure>\n\n\n\n<p>A narv\u00e1lok, a gyilkos b\u00e1ln\u00e1khoz \u00e9s a kardsz\u00e1rny\u00fa delfinekhez hasonl\u00f3an, a fogascetek rendj\u00e9be tartoznak. Azonban ezen a bel\u00fcl is meglehet\u0151sen k\u00fcl\u00f6nlegesnek sz\u00e1m\u00edtanak. M\u00e9ret\u00fck nem hatalmas: egy kifejlett h\u00edm narv\u00e1l hossza maximum 5,5 m\u00e9ter, s\u00falya pedig 1600 kilogramm k\u00f6r\u00fcl alakul. A n\u0151st\u00e9nyek enn\u00e9l is kisebbek, \u00e1ltal\u00e1ban 1 tonna alattiak.<\/p>\n\n\n\n<p>Teh\u00e1t nem \u00f3ri\u00e1sokr\u00f3l van sz\u00f3, de kecses, \u00e1ramvonalas testalkatukkal \u00e9s jellegzetes agyarukkal m\u00e9g \u00edgy is leny\u0171g\u00f6z\u0151ek. K\u00fcl\u00f6n\u00f6sen, ha a jeges tenger csillog\u00f3 h\u00e1tter\u00e9ben \u00faszk\u00e1lnak, igazi mesebeli l\u00e9nyeknek t\u0171nnek.<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-buzzeditor-list-item\"><h3 class=\"be-list-item-title\"> <\/h3>\n<figure class=\"wp-block-image size-full\"><img src=\"https:\/\/nebazz.com\/wp-content\/uploads\/2024\/02\/Narval-szarv-erdekessegek-010.webp\" alt=\"\" class=\"wp-image-49\"\/><\/figure>\n\n\n\n<p>Egyed\u00fcl\u00e1ll\u00f3 k\u00fclsej\u00e9t m\u00e9g egy k\u00fcl\u00f6nleges &#8222;kieg\u00e9sz\u00edt\u0151vel&#8221; dobja fel: egy hatalmas agyarral, ami a pof\u00e1j\u00e1b\u00f3l n\u0151 ki. Ez a k\u00fcl\u00f6nleges &#8222;d\u00edsz&#8221; ihlette meg a narv\u00e1lokr\u00f3l sz\u00f3l\u00f3 gyerekverseket \u00e9s legend\u00e1kat, \u00e9s rengeteg kutat\u00f3exped\u00edci\u00f3t ind\u00edtott \u00fatj\u00e1ra, hogy megfejts\u00e9k a rejt\u00e9lyt: mire haszn\u00e1lhatj\u00e1k a b\u00e1ln\u00e1k ezt a &#8222;l\u00e1ndzs\u00e1t&#8221;?<\/p>\n\n\n\n<p>A tud\u00f3sok m\u00e9g nem tudnak egy\u00e9rtelm\u0171 v\u00e1laszt adni a k\u00e9rd\u00e9sre, de sz\u00e1mos hihet\u0151 \u00e9s egym\u00e1ssal nem ellentmond\u00f3 elm\u00e9let l\u00e9tezik. Miel\u0151tt ezeket g\u00f3rcs\u0151 al\u00e1 venn\u00e9nk, fontos meg\u00e9rten\u00fcnk, hogy mi is ez a &#8222;kin\u00f6v\u00e9s&#8221; pontosan. Szarv? Fog? A koponya r\u00e9sze?<\/p>\n\n\n\n\n<div style=\"float:none;margin:0px 0 0px 0;text-align:center;\">\n<div class=\"mobileHideke5\"><div style=\"margin-top:25px;\"><div class=\"hirdeteshatter\"><div style=\"display: inline-block;width: 50%;min-width:305px;vertical-align: top;\"><div class=\"hirdetes\">HIRDET\u00c9S<\/div>\n<!-- LikedQ51 -->\n<ins class=\"adsbygoogle\"\n     style=\"display:inline-block;width:300px;height:250px\"\n     data-ad-client=\"ca-pub-9424088931673893\"\n     data-ad-slot=\"8284063326\"><\/ins>\n<script async>\n     (adsbygoogle = window.adsbygoogle || []).push({});\n<\/script><\/div><div style=\"display: inline-block;width: 50%;min-width:305px;vertical-align: top;\"><div class=\"hirdetes\">HIRDET\u00c9S<\/div>\n<!-- LikedQ52 -->\n<ins class=\"adsbygoogle\"\n     style=\"display:inline-block;width:300px;height:250px\"\n     data-ad-client=\"ca-pub-9424088931673893\"\n     data-ad-slot=\"2840164950\"><\/ins>\n<script async>\n     (adsbygoogle = window.adsbygoogle || []).push({});\n<\/script><\/div><\/div><\/div><\/div>\n<div style=\"display:flex;flex-direction:column;\"><div class=\"mobileShowka5\"><div style=\"padding-top:10px;padding-bottom:10px;min-height: 300px;\"><div class=\"hirdetes\">HIRDET\u00c9S<\/div>\n<!-- LikedQ5M -->\n<ins class=\"adsbygoogle\"\n     style=\"display:inline-block;width:300px;height:250px\"\n     data-ad-client=\"ca-pub-9424088931673893\"\n     data-ad-slot=\"9022429928\"><\/ins>\n<script async>\n     (adsbygoogle = window.adsbygoogle || []).push({});\n<\/script><\/div><\/div><\/div><\/div>\n\n<\/div>\n\n\n\n<div class=\"wp-block-buzzeditor-list-item\"><h3 class=\"be-list-item-title\"> <\/h3>\n<figure class=\"wp-block-image size-full\"><img src=\"https:\/\/nebazz.com\/wp-content\/uploads\/2024\/02\/Narval-szarv-erdekessegek-009.webp\" alt=\"\" class=\"wp-image-48\"\/><\/figure>\n\n\n\n<p>A tud\u00f3sok egyet\u00e9rtenek abban, hogy a narv\u00e1l agyara val\u00f3j\u00e1ban egy rendk\u00edv\u00fcl hossz\u00fa szemfog, ami a fels\u0151 \u00e1llcsontb\u00f3l n\u0151 ki. Ez a fog balra csavarodik, mint egy j\u00e9gkr\u00e9m a pultban. El\u00e9rheti a 3 m\u00e9teres hossz\u00fas\u00e1got \u00e9s a 10 kilogrammos s\u00falyt is.<\/p>\n\n\n\n<p>Hordozni nem a legk\u00e9nyelmesebb, \u00e1tsz\u00farni sem lehet vele senkit, \u00e9s var\u00e1zsolni sem k\u00e9pes. Akkor vajon mi\u00e9rt aj\u00e1nd\u00e9kozta meg az evol\u00faci\u00f3 a narv\u00e1lokat ezzel a k\u00fcl\u00f6nleges &#8222;eszk\u00f6zzel&#8221;?<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-buzzeditor-list-item\"><h3 class=\"be-list-item-title\"> <\/h3>\n<figure class=\"wp-block-image size-full\"><img src=\"https:\/\/nebazz.com\/wp-content\/uploads\/2024\/02\/Narval-szarv-erdekessegek-008.webp\" alt=\"\" class=\"wp-image-47\"\/><\/figure>\n\n\n\n<p>Az egyik elm\u00e9let szerint a narv\u00e1lok az agyarukat j\u00e9gt\u00f6r\u00e9sre haszn\u00e1lj\u00e1k. Ez logikusnak t\u0171nik, ha figyelembe vessz\u00fck \u00e9l\u0151hely\u00fcket: a Jeges-tengert \u00e9s az Atlanti-\u00f3ce\u00e1n \u00e9szaki r\u00e9sz\u00e9t. Ny\u00e1ron a partvid\u00e9ken tart\u00f3zkodnak, de t\u00e9len d\u00e9lebbre v\u00e1ndorolnak a ny\u00edlt v\u00edzre. \u0150sszel, a migr\u00e1ci\u00f3 sor\u00e1n nagy a kock\u00e1zata annak, hogy j\u00e9gbe szorulnak, ha a j\u00e9g gyorsabban k\u00e9pz\u0151dik, mint ahogy el tudn\u00e1k hagyni a ter\u00fcletet. V\u00edz alatt, leveg\u0151h\u00f6z jut\u00e1s n\u00e9lk\u00fcl a narv\u00e1lok csak 1,5 kilom\u00e9tert tudnak megtenni. Ha ezen a t\u00e1vols\u00e1gon bel\u00fcl nem tal\u00e1lnak l\u00e9ket, sajnos megfulladnak. 1915-ben Nyugat-Gr\u00f6nlandon, a legnagyobb j\u00e9gcsapd\u00e1ban t\u00f6bb mint 1000 narv\u00e1l pusztult el!<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-buzzeditor-list-item\"><h3 class=\"be-list-item-title\"> <\/h3>\n<figure class=\"wp-block-image size-full\"><img src=\"https:\/\/nebazz.com\/wp-content\/uploads\/2024\/02\/Narval-szarv-erdekessegek-007.webp\" alt=\"\" class=\"wp-image-46\"\/><\/figure>\n\n\n\n<p>\u00c9rthet\u0151 teh\u00e1t, hogy a narv\u00e1lok mindent megtesznek az\u00e9rt, hogy \u00e1tt\u00f6rj\u00e9k a jeget. Els\u0151 pillant\u00e1sra logikusnak t\u0171nik, hogy ehhez az agyarukat haszn\u00e1lj\u00e1k, de&#8230;<\/p>\n\n\n\n<p>El\u0151sz\u00f6r is, az agyar nem alkalmas intenz\u00edv j\u00e9gt\u00f6r\u00e9sre. T\u00fal v\u00e9kony \u00e9s s\u00e9r\u00fcl\u00e9keny ahhoz, hogy vastag j\u00e9gr\u00e9teget \u00e1tt\u00f6rj\u00f6n.<\/p>\n\n\n\n<p>M\u00e1sodszor, az agyar f\u0151k\u00e9nt a h\u00edm narv\u00e1lokn\u00e1l fejl\u0151dik ki igaz\u00e1n. A n\u0151st\u00e9nyek mind\u00f6ssze 15%-a rendelkezik ilyen &#8222;pomp\u00e1s&#8221; agyarral. Akkor mi a helyzet a n\u0151st\u00e9nyekkel? Hogyan \u00e9lik t\u00fal a j\u00e9gcsapd\u00e1kat agyar n\u00e9lk\u00fcl?<\/p>\n\n\n\n\n<div style=\"float:none;margin:0px 0 0px 0;text-align:center;\">\n<div class=\"mobileHideke8\"><div style=\"margin-top:25px;\"><div class=\"hirdeteshatter\"><div style=\"display: inline-block;width: 50%;min-width:340px;vertical-align: top;\"><div class=\"hirdetes\">HIRDET\u00c9S<\/div>\n<!-- Liked7Q1 -->\n<ins class=\"adsbygoogle\"\n     style=\"display:inline-block;width:336px;height:280px\"\n     data-ad-client=\"ca-pub-9424088931673893\"\n     data-ad-slot=\"3022062587\"><\/ins>\n<script async>\n     (adsbygoogle = window.adsbygoogle || []).push({});\n<\/script><\/div><div style=\"display: inline-block;width: 50%;min-width:340px;vertical-align: top;\"><div class=\"hirdetes\">HIRDET\u00c9S<\/div>\n<!-- Liked7Q2 -->\n<ins class=\"adsbygoogle\"\n     style=\"display:inline-block;width:336px;height:280px\"\n     data-ad-client=\"ca-pub-9424088931673893\"\n     data-ad-slot=\"3952000871\"><\/ins>\n<script async>\n     (adsbygoogle = window.adsbygoogle || []).push({});\n<\/script><\/div><\/div><\/div><\/div>\n<div style=\"display:flex;flex-direction:column;\"><div class=\"mobileShowka8\"><div style=\"padding-top:15px;margin-bottom:15px;min-height: 300px;\"><div class=\"hirdetes\">HIRDET\u00c9S<\/div>\n<!-- Liked7QMobil -->\n<ins class=\"adsbygoogle\"\n     style=\"display:inline-block;width:336px;height:280px\"\n     data-ad-client=\"ca-pub-9424088931673893\"\n     data-ad-slot=\"5073510857\"><\/ins>\n<script async>\n     (adsbygoogle = window.adsbygoogle || []).push({});\n<\/script><\/div><\/div><\/div><\/div>\n\n<\/div>\n\n\n\n<div class=\"wp-block-buzzeditor-list-item\"><h3 class=\"be-list-item-title\"> <\/h3>\n<figure class=\"wp-block-image size-full\"><img src=\"https:\/\/nebazz.com\/wp-content\/uploads\/2024\/02\/Narval-szarv-erdekessegek-006.webp\" alt=\"\" class=\"wp-image-45\"\/><\/figure>\n\n\n\n<p>Egy m\u00e1sik elm\u00e9let szerint a narv\u00e1lok agyara a p\u00e1rv\u00e1laszt\u00e1si versenyben j\u00e1tszik szerepet. Nem val\u00f3sz\u00edn\u0171, hogy igazi p\u00e1rbajokat v\u00edvn\u00e1nak ezekkel a &#8222;l\u00e1ndzs\u00e1kkal&#8221;, ahhoz ugyanis t\u00fal s\u00e9r\u00fcl\u00e9kenyek. Azonban nem kiz\u00e1rt, hogy a h\u00edmek egyszer\u0171en \u00f6sszehasonl\u00edtj\u00e1k agyarukat, \u00e9s a leghosszabb &#8222;fegyverrel&#8221; rendelkez\u0151 h\u00edm jut el\u0151nyh\u00f6z a p\u00e1rosod\u00e1sban.<\/p>\n\n\n\n<p>Ezt az elm\u00e9letet neh\u00e9z bizony\u00edtani, mivel keveset tudunk a narv\u00e1lok n\u00e1szszertart\u00e1sair\u00f3l. Annyit tudunk, hogy tavasszal, a tengeri j\u00e9g olvad\u00e1sakor p\u00e1rosodnak. Sajnos ezen id\u0151szak alatt neh\u00e9z megfigyelni \u0151ket.<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-buzzeditor-list-item\"><h3 class=\"be-list-item-title\"> <\/h3>\n<figure class=\"wp-block-image size-full\"><img src=\"https:\/\/nebazz.com\/wp-content\/uploads\/2024\/02\/Narval-szarv-erdekessegek-005.webp\" alt=\"\" class=\"wp-image-44\"\/><\/figure>\n\n\n\n<p>Egy harmadik elm\u00e9let szerint a narv\u00e1lok agyara a vad\u00e1szatban seg\u00edt. A narv\u00e1lok f\u0151k\u00e9nt a tengerfen\u00e9ken \u00e9l\u0151 halakkal, tintahalakkal, garn\u00e9l\u00e1kkal, szardell\u00e1kkal \u00e9s m\u00e1s tengeri \u00e9l\u0151l\u00e9nyekkel t\u00e1pl\u00e1lkoznak. T\u00e1pl\u00e1l\u00e9k\u00e9rt ak\u00e1r 1500 m\u00e9ter m\u00e9lyre is lemer\u00fclnek, \u00e9s 25 percet is elt\u00f6lthetnek a v\u00edz alatt.<\/p>\n\n\n\n<p>Azonban a narv\u00e1loknak, a hatalmas agyarukon k\u00edv\u00fcl, nincsenek m\u00e1s fogaik, \u00edgy nem tudj\u00e1k megr\u00e1gni a zs\u00e1km\u00e1nyukat. Ez\u00e9rt felt\u00e9telezik, hogy az agyarat bunk\u00f3k\u00e9nt haszn\u00e1lj\u00e1k a zs\u00e1km\u00e1ny meg\u00fct\u00e9s\u00e9re \u00e9s leter\u00edt\u00e9s\u00e9re.<\/p>\n\n\n\n<p>Ennek az elm\u00e9letnek is megvannak a maga korl\u00e1tai. A tud\u00f3sok eddig csak egyetlen alkalommal figyelt\u00e9k meg ezt a viselked\u00e9st. A legt\u00f6bb esetben a narv\u00e1lok csup\u00e1n felriasztj\u00e1k a halakat a tengerfen\u00e9kr\u0151l. R\u00e1ad\u00e1sul a n\u0151st\u00e9nyek t\u00f6bbs\u00e9g\u00e9nek &#8211; mint azt m\u00e1r eml\u00edtett\u00fck &#8211; nincs agyara, \u00e1m ez nem jelenti azt, hogy ett\u0151l \u00e9hen haln\u00e1nak.<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-buzzeditor-list-item\"><h3 class=\"be-list-item-title\"> <\/h3>\n<figure class=\"wp-block-image size-full\"><img src=\"https:\/\/nebazz.com\/wp-content\/uploads\/2024\/02\/Narval-szarv-erdekessegek-004.webp\" alt=\"\" class=\"wp-image-43\"\/><\/figure>\n\n\n\n<p>Egy m\u00e1sik elm\u00e9let a narv\u00e1l agyar\u00e1nak anat\u00f3mi\u00e1j\u00e1ra \u00f6sszpontos\u00edt. Mivel az agyar val\u00f3j\u00e1ban egy fog, ez\u00e9rt kollag\u00e9nb\u0151l, dentinb\u0151l \u00e9s purcb\u00f3l \u00e1ll. Az idegv\u00e9gz\u0151d\u00e9sek felel\u0151sek a fogak h\u0151m\u00e9rs\u00e9klet-\u00e9rz\u00e9kel\u00e9s\u00e9\u00e9rt. M\u00edg az emberi fogakat zom\u00e1nc v\u00e9di, a narv\u00e1lok agyar\u00e1n nincs ilyen v\u00e9d\u0151r\u00e9teg. El tudod k\u00e9pzelni, milyen \u00e9rz\u00e9s lehet egy 3 m\u00e9teres, kihegyezett foggal \u00e9lni, ami \u00e1lland\u00f3an ki van t\u00e9ve az ingereknek?<\/p>\n\n\n\n<p>A kutat\u00f3k \u00fagy gondolj\u00e1k, hogy ez a &#8222;nyitott&#8221; szerkezet sz\u00e1nd\u00e9kos, \u00e9s lehet\u0151v\u00e9 teszi a narv\u00e1lok sz\u00e1m\u00e1ra, hogy rendk\u00edv\u00fcl \u00e9rz\u00e9kenyen reag\u00e1ljanak a v\u00edzben bek\u00f6vetkez\u0151 legkisebb v\u00e1ltoz\u00e1sokra is. Ez logikus, ha belegondolunk, hogy a s\u00f3tartalom ingadoz\u00e1sa jelezheti a v\u00edz fagy\u00e1s\u00e1t \u00e9s p\u00e9ld\u00e1ul a j\u00e9gcsapda kialakul\u00e1s\u00e1t. De ha az agyar ennyire ide\u00e1lis eszk\u00f6z erre a c\u00e9lra, akkor mi\u00e9rt nem n\u0151 mindk\u00e9t nemn\u00e9l egyform\u00e1n?<\/p>\n\n\n\n\n<div style=\"float:none;margin:0px 0 0px 0;text-align:center;\">\n<div class=\"mobileHideke8\"><div class=\"hirdeteshatter\"><div style=\"display: inline-block;width: 50%;min-width:340px;vertical-align: top;\"><div class=\"hirdetes\">HIRDET\u00c9S<\/div>\n<!-- LikedQ81 -->\n<ins class=\"adsbygoogle\"\n     style=\"display:inline-block;width:336px;height:280px\"\n     data-ad-client=\"ca-pub-9424088931673893\"\n     data-ad-slot=\"2436840276\"><\/ins>\n<script async>\n     (adsbygoogle = window.adsbygoogle || []).push({});\n<\/script><\/div><div style=\"display: inline-block;width: 50%;min-width:340px;vertical-align: top;\"><div class=\"hirdetes\">HIRDET\u00c9S<\/div>\n<!-- LikedQ82 -->\n<ins class=\"adsbygoogle\"\n     style=\"display:inline-block;width:336px;height:280px\"\n     data-ad-client=\"ca-pub-9424088931673893\"\n     data-ad-slot=\"3558350253\"><\/ins>\n<script async>\n     (adsbygoogle = window.adsbygoogle || []).push({});\n<\/script><\/div><\/div><\/div>\n<div style=\"display:flex;flex-direction:column;\"><div class=\"mobileShowka8 nyolc\"><div style=\"padding-top:15px;padding-bottom:5px;min-height: 300px;\"><div class=\"hirdetes\">HIRDET\u00c9S<\/div>\n<!-- LikedQ8M -->\n<ins class=\"adsbygoogle\"\n     style=\"display:inline-block;width:336px;height:280px\"\n     data-ad-client=\"ca-pub-9424088931673893\"\n     data-ad-slot=\"4679860235\"><\/ins>\n<script async>\n     (adsbygoogle = window.adsbygoogle || []).push({});\n<\/script><\/div><\/div><\/div><\/div>\n\n<\/div>\n\n\n\n<div class=\"wp-block-buzzeditor-list-item\"><h3 class=\"be-list-item-title\"> <\/h3>\n<figure class=\"wp-block-image size-full\"><img src=\"https:\/\/nebazz.com\/wp-content\/uploads\/2024\/02\/Narval-szarv-erdekessegek-003.webp\" alt=\"\" class=\"wp-image-42\"\/><\/figure>\n\n\n\n<p>A narv\u00e1lok leny\u0171g\u00f6z\u0151 agyar\u00e1val ellent\u00e9tben kevesebbet tudunk a t\u00e1rsas \u00e9let\u00fckr\u0151l. Azonban a tud\u00f3sok nemr\u00e9giben felfedeztek egy \u00e9rdekes jelens\u00e9get: a n\u0151st\u00e9nyekn\u00e9l menopauza is bek\u00f6vetkezik. Ez a tulajdons\u00e1g &#8211; az emberen k\u00edv\u00fcl &#8211; csak elv\u00e9tve fordul el\u0151 az \u00e1llatvil\u00e1gban.<\/p>\n\n\n\n<p>A narv\u00e1lok elm\u00e9letileg ak\u00e1r 115 \u00e9vig is \u00e9lhetnek, de \u00e1tlagosan 50-60 \u00e9vet \u00e9lnek. A n\u0151st\u00e9nyek 6-8 \u00e9vesen hoznak el\u0151sz\u00f6r ut\u00f3dot a vil\u00e1gra, a vemhess\u00e9g pedig 14 h\u00f3napig tart. \u00c1ltal\u00e1ban egyetlen borj\u00fa sz\u00fcletik, aki sz\u00fclet\u00e9s ut\u00e1n k\u00f6r\u00fclbel\u00fcl k\u00e9t \u00e9vig f\u00fcgg az anyj\u00e1t\u00f3l. Ha teh\u00e1t a narv\u00e1lok szaporod\u00e1si \u00fcteme nem t\u00fal magas, akkor mi\u00e9rt van sz\u00fcks\u00e9g\u00fck a menopauz\u00e1ra?<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-buzzeditor-list-item\"><h3 class=\"be-list-item-title\"> <\/h3>\n<figure class=\"wp-block-image size-full\"><img src=\"https:\/\/nebazz.com\/wp-content\/uploads\/2024\/02\/Narval-szarv-erdekessegek-002.webp\" alt=\"\" class=\"wp-image-41\"\/><\/figure>\n\n\n\n<p>A narv\u00e1lok menopauz\u00e1j\u00e1nak egyik lehets\u00e9ges oka a &#8222;nagymama-hipot\u00e9zis&#8221;. Ez a hipot\u00e9zis azt sugallja, hogy a menopauza az\u00e9rt alakult ki, mert a nagymam\u00e1k \u00e1ltal ny\u00fajtott gondoz\u00e1s jelent\u0151sen n\u00f6veli az unok\u00e1k t\u00fal\u00e9l\u00e9si es\u00e9lyeit.<\/p>\n\n\n\n<p>A tapasztalt nagymam\u00e1k tud\u00e1sukat \u00e9s b\u00f6lcsess\u00e9g\u00fcket \u00e1tadhatj\u00e1k a fiatalabb gener\u00e1ci\u00f3nak, tan\u00edtva \u0151ket a t\u00e1pl\u00e1lkoz\u00e1sra, a vad\u00e1szatra, a ragadoz\u00f3k elker\u00fcl\u00e9s\u00e9re \u00e9s a t\u00e1rsas interakci\u00f3kra. Ez a tud\u00e1s kulcsfontoss\u00e1g\u00fa a narv\u00e1lok sz\u00e1m\u00e1ra, hogy zord sarkvid\u00e9ki k\u00f6rnyezet\u00fckben fennmaradjanak.<\/p>\n\n\n\n<p>Egy tanulm\u00e1ny kimutatta, hogy a narv\u00e1l popul\u00e1ci\u00f3kban, ahol sok a nagymama, a borjak t\u00fal\u00e9l\u00e9si es\u00e9lye 50%-kal is magasabb. Ez azt sugallja, hogy a nagymam\u00e1k \u00e1ltal ny\u00fajtott gondoz\u00e1s \u00f3ri\u00e1si hat\u00e1ssal van a popul\u00e1ci\u00f3 eg\u00e9szs\u00e9g\u00e9re \u00e9s fenntarthat\u00f3s\u00e1g\u00e1ra.<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-buzzeditor-list-item\"><h3 class=\"be-list-item-title\"> <\/h3>\n<figure class=\"wp-block-image size-full\"><img src=\"https:\/\/nebazz.com\/wp-content\/uploads\/2024\/02\/Narval-szarv-erdekessegek-001.webp\" alt=\"\" class=\"wp-image-40\"\/><\/figure>\n\n\n\n<p>Jelenleg a narv\u00e1lok popul\u00e1ci\u00f3ja nincs jelent\u0151s vesz\u00e9lynek kit\u00e9ve. Nincsen r\u00e1juk ir\u00e1nyul\u00f3 t\u00f6meges ipari vad\u00e1szat. Az ember \u00e9vente kevesebb mint 1000 p\u00e9ld\u00e1nyt ejt el, ami j\u00f3val kevesebb, mint amennyit a kardsz\u00e1rny\u00fa delfinek \u00e9s a jegesmedv\u00e9k ejtenek el, illetve amennyi a j\u00e9gbe fagyva, \u00e9hen, vagy mondjuk az \u00f3ce\u00e1nok szennyez\u0151d\u00e9se miatt pusztul el.<\/p>\n\n\n\n<p>Ugyanakkor a narv\u00e1lok rendk\u00edv\u00fcl \u00e9rz\u00e9kenyek a kl\u00edmav\u00e1ltoz\u00e1sra. A tud\u00f3sok \u00e9pp ez\u00e9rt a narv\u00e1lok popul\u00e1ci\u00f3inak v\u00e1ltoz\u00e1saib\u00f3l k\u00f6zvetlen k\u00f6vetkeztet\u00e9seket tudnak levonni a kl\u00edmav\u00e1ltoz\u00e1s m\u00e9rt\u00e9k\u00e9vel \u00e9s s\u00falyoss\u00e1g\u00e1val kapcsolatban.<\/p>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Ezek az \u00e1llatok a v\u00edzivil\u00e1g unikornisai.<\/p>\n","protected":false},"author":5,"featured_media":322749,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"buzzeditor_post_format":""},"categories":[46,23],"tags":[133,5823,9846,2562],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v19.6.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Narv\u00e1l: mi\u00e9rt van egy hatalmas agyar ennek a b\u00e1ln\u00e1nak az orr\u00e1n?<\/title>\n<meta name=\"description\" content=\"Ezek az \u00e1llatok a v\u00edzivil\u00e1g unikornisai.\" \/>\n<meta name=\"robots\" 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