{"id":1630,"date":"2014-05-12T14:31:31","date_gmt":"2014-05-12T14:31:31","guid":{"rendered":"http:\/\/www.123fakta.com\/da\/?p=1630"},"modified":"2026-03-19T10:38:28","modified_gmt":"2026-03-19T10:38:28","slug":"fakta-om-haier","status":"publish","type":"post","link":"https:\/\/www.123fakta.com\/nb\/facts-about-sharks","title":{"rendered":"Fakta om haier"},"content":{"rendered":"<ol>\n<li><strong>Luktesans:<\/strong>\u00a0Haier har en ekstremt god luktesans og kan lukte blod p\u00e5 lang avstand. Den n\u00f8yaktige avstanden kan v\u00e6re mellom 400 m og 2 km, avhengig av haiart og vannforhold. 2\/3 av haiens hjerne er dedikert til luktesansen.<\/li>\n<li><strong>Synker:<\/strong> Hvis en hai slutter \u00e5 sv\u00f8mme, synker den til bunns. Noen haiarter d\u00f8r hvis de ikke sv\u00f8mmer, fordi livet deres avhenger av at det hele tiden str\u00f8mmer vann gjennom gjellene (noe som bare skjer n\u00e5r de drives gjennom vannet).<\/li>\n<li><strong>400 millioner \u00e5r:<\/strong>\u00a0Haier har eksistert uten store endringer de siste 400 millioner \u00e5rene - noe som betyr at de var her lenge f\u00f8r vi fikk <a href=\"https:\/\/www.123fakta.com\/nb\/fakta-om-dinosaurer\/\">dinosaurer<\/a> ankommet<\/li>\n<li><strong>Isbj\u00f8rnespisere:<\/strong>\u00a0Gr\u00f8nlandshaien (ogs\u00e5 kalt \"havhest\" eller \"Somniosus microcephalus\") lever av <a href=\"https:\/\/www.123fakta.com\/nb\/fakta-om-isbjorner\/\">isbj\u00f8rner<\/a> og kan leve i opptil 200 \u00e5r<\/li>\n<li><strong>Tigerhaier:<\/strong>\u00a0S\u00e5 snart tigerhaiembryoene utvikler tenner, angriper de s\u00f8sknene sine og spiser hverandre (mens de fortsatt er i morens mage). Dette er n\u00f8dvendig for at embryoene skal vokse. Siden tigerhaien har to livmorer, er det bare to embryoer igjen ved f\u00f8dselen.<\/li>\n<li><strong>Akselerasjon:<\/strong>\u00a0Den kortfinnede makohaien kan akselerere raskere enn en Porsche.<\/li>\n<li><strong>Oksehaier:<\/strong>\u00a0Oksehaien kan leve b\u00e5de i saltvann og ferskvann.<\/li>\n<li><strong>De st\u00f8rste haiene:<\/strong>\u00a0Verdens to st\u00f8rste haier, hvalhaien og brugden, er ufarlige planktonspisere.<\/li>\n<li><strong>Den minste haien:<\/strong>\u00a0Verdens minste hai, dverghaien, er bare 15 cm lang som voksen.<\/li>\n<li><strong>Tenner:<\/strong>\u00a0Hvithaien kan miste opptil 1000 tenner p\u00e5 ett \u00e5r. Til sammenligning tar det mennesker 7 \u00e5r \u00e5 miste 20 tenner. Det tar s\u00e5 lite som 3 dager \u00e5 erstatte en tann som har falt ut. I l\u00f8pet av en hais levetid kan det vokse ut opptil 30 000 tenner i kjevene.<\/li>\n<\/ol>\n<figure id=\"attachment_7530\" aria-describedby=\"caption-attachment-7530\" style=\"width: 790px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-7530\" src=\"https:\/\/www.123fakta.com\/wp-content\/uploads\/hajer-fakta-2.jpg\" alt=\"Fakta: Haier dreper langt f\u00e6rre mennesker \u00e5rlig enn de fleste tror.\" width=\"800\" height=\"600\" srcset=\"https:\/\/www.123fakta.com\/wp-content\/uploads\/hajer-fakta-2.jpg 800w, https:\/\/www.123fakta.com\/wp-content\/uploads\/hajer-fakta-2-300x225.jpg 300w, https:\/\/www.123fakta.com\/wp-content\/uploads\/hajer-fakta-2-768x576.jpg 768w, https:\/\/www.123fakta.com\/wp-content\/uploads\/hajer-fakta-2-16x12.jpg 16w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption id=\"caption-attachment-7530\" class=\"wp-caption-text\">Kildeangivelse: Allan Lee - Flickr.com<\/figcaption><\/figure>\n<p style=\"text-align: center;\"><em><strong>Fakta: Haier dreper 12 mennesker hvert \u00e5r - mennesker dreper 11 417 haier i timen.<\/strong><\/em><\/p>\n<h2>Fakta om gr\u00f8nlandshaier<\/h2>\n<ul>\n<li><strong>Alder<\/strong>: I\u00a0<a href=\"http:\/\/videnskab.dk\/naturvidenskab\/verdens-aeldste-hvirveldyr-groenlandshaj-blev-op-mod-512-aar-gammel\">en studie fra 2016<\/a> ble den eldste n\u00e5levende gr\u00f8nlandshaien ansl\u00e5tt til \u00e5 v\u00e6re mellom 272 og 512 \u00e5r gammel (gr\u00f8nlandshajens alder kan ikke m\u00e5les n\u00f8yaktig). Gr\u00f8nlandshajens h\u00f8ye levealder gj\u00f8r den sannsynligvis til det lengstlevende virveldyret p\u00e5 planeten. F\u00f8r oppdagelsen av gr\u00f8nlandshajens lange levetid var det en 211 \u00e5r gammel gr\u00f8nlandshval som hadde rekorden som verdens eldste virveldyr.<\/li>\n<li><strong>Kj\u00f8nnsmodenhet<\/strong>: Alder ved kj\u00f8nnsmodning: Gr\u00f8nlandshaier blir kj\u00f8nnsmodne n\u00e5r de er rundt 100 \u00e5r gamle (hunnene blir ikke kj\u00f8nnsmodne f\u00f8r de er rundt 4 meter lange). De er vanligvis kj\u00f8nnsmodne n\u00e5r de er rundt 150 \u00e5r gamle.<\/li>\n<\/ul>\n<h2>Mer fakta om haier<\/h2>\n<ul>\n<li><strong>Skjelett:<\/strong>\u00a0Haier har ingen bein, da skjelettet deres utelukkende best\u00e5r av brusk. N\u00e5r haier d\u00f8r, blir kroppen fullstendig oppl\u00f8st av vannet, og bare tennene blir igjen.<\/li>\n<li><strong>Mat:<\/strong>\u00a0En fullvoksen hvithai kan overleve i 3 m\u00e5neder uten \u00e5 spise.<\/li>\n<li><strong>Kj\u00f8ttetere:<\/strong>\u00a0Det finnes ingen planteetende haier<\/li>\n<li><strong>Skarpe tenner:<\/strong>\u00a0Tennene til tigerhaier er s\u00e5 skarpe at de kan skj\u00e6re gjennom skallet til en havskilpadde.<\/li>\n<li><strong>Kreft:<\/strong>\u00a0Forskere studerer haibrusk for \u00e5 finne mulige kreftkurer fordi haier sjelden f\u00e5r kreft<\/li>\n<li><strong>Arter:<\/strong>\u00a0Det finnes minst 500 haiarter i verden.<\/li>\n<li><strong>Overfiske:<\/strong>\u00a0Overfiske kan f\u00e5 alvorlige konsekvenser for haier. Hvalhaien kan for eksempel ikke formere seg f\u00f8r i det 30. leve\u00e5ret, og den totale levetiden er 60-100 \u00e5r. Derfor kan de ikke reprodusere seg raskt nok til \u00e5 kompensere for nedgangen i bestanden som skyldes fiske.<\/li>\n<li><strong>Fobi:<\/strong>\u00a0\"Galeofobi\" er frykten for haier. Begrepet kommer fra det greske ordet \"galeos\", som betyr \"pigghai, liten hai\", og var navnet p\u00e5 en bestemt type hai med hvallignende trekk.<\/li>\n<li><strong>Alder<\/strong>: Haier lever vanligvis 2-3 ganger s\u00e5 lenge som de blir kj\u00f8nnsmodne. S\u00e5 hvis en hai blir kj\u00f8nnsmoden n\u00e5r den er 70 \u00e5r gammel, kan den bli mellom 140 og 210 \u00e5r gammel.<\/li>\n<li><strong>Vekst<\/strong>: I motsetning til pattedyr, som slutter \u00e5 vokse ved en viss alder, vokser haier - i likhet med <a href=\"https:\/\/www.123fakta.com\/nb\/fakta-om-fisk\/\">fisk<\/a> - fortsette \u00e5 vokse gjennom hele livet.<\/li>\n<\/ul>\n<figure id=\"attachment_7531\" aria-describedby=\"caption-attachment-7531\" style=\"width: 990px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-7531\" src=\"https:\/\/www.123fakta.com\/wp-content\/uploads\/den-store-hvide-haj-2.jpg\" alt=\"Fakta: Hvithaien kan overleve i tre m\u00e5neder uten mat.\" width=\"1000\" height=\"667\" srcset=\"https:\/\/www.123fakta.com\/wp-content\/uploads\/den-store-hvide-haj-2.jpg 1000w, https:\/\/www.123fakta.com\/wp-content\/uploads\/den-store-hvide-haj-2-300x200.jpg 300w, https:\/\/www.123fakta.com\/wp-content\/uploads\/den-store-hvide-haj-2-768x512.jpg 768w, https:\/\/www.123fakta.com\/wp-content\/uploads\/den-store-hvide-haj-2-18x12.jpg 18w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><figcaption id=\"caption-attachment-7531\" class=\"wp-caption-text\">Navngivelse: Travelbag Ltd - Flickr.com<\/figcaption><\/figure>\n<p style=\"text-align: center;\"><em><strong>Fakta: Hvithaien kan overleve i opptil 3 m\u00e5neder uten mat.<\/strong><\/em><\/p>\n<h2>Fakta om haiangrep<\/h2>\n<ul>\n<li><strong>Bite:<\/strong>\u00a0I de sjeldne tilfellene der haier angriper mennesker, biter de vanligvis bare \u00e9n gang. De holder vanligvis bare fast offeret i noen f\u00e5 sekunder f\u00f8r de skj\u00f8nner at det ikke er et sj\u00f8dyr de har fanget...<\/li>\n<li><strong>Haier mot mennesker:<\/strong>\u00a0Haier dreper 12 mennesker hvert \u00e5r - mennesker dreper 11 417 haier hver time<\/li>\n<li><strong>Menneskebitt:<\/strong>\u00a0Det er mer sannsynlig at du blir bitt av et annet menneske enn av en hai.<\/li>\n<li><strong>Kystangrep:<\/strong>\u00a0De aller fleste haiangrep skjer opptil noen hundre meter fra kysten. Dette skyldes imidlertid utelukkende at mennesker prim\u00e6rt sv\u00f8mmer n\u00e6r kysten.<\/li>\n<li><strong>Lavvann:<\/strong>\u00a0Rundt 2\/3 av alle haiangrep skjer p\u00e5 grunt vann (under 1,8 meters dyp).<\/li>\n<li><strong>Sannsynlighet:<\/strong>\u00a0Det er st\u00f8rre sannsynlighet for \u00e5 d\u00f8 av en fallende kokosn\u00f8tt enn av et haiangrep. Det er ogs\u00e5 st\u00f8rre sannsynlighet for \u00e5 d\u00f8 av lynnedslag eller bistikk enn av et haiangrep.<\/li>\n<li><strong>Advarselstegn:<\/strong>\u00a0F\u00f8lgende er tegn p\u00e5 at en hai vil angripe: Den b\u00f8yer ryggen, senker brystfinnene og sv\u00f8mmer i et sikksakkm\u00f8nster<\/li>\n<li><strong>Mannlige ofre:<\/strong>\u00a0Selv om nesten like mange menn som kvinner sv\u00f8mmer i verdenshavene, er rundt 90% av alle haiofre menn.<\/li>\n<li><strong>F\u00e5 arter angriper:<\/strong>\u00a0Bare rundt 3% av alle haiarter har historisk sett angrepet mennesker.<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"<p>Luktesans: Haier har en ekstremt skarp luktesans og kan lukte blod p\u00e5 lang avstand. Den n\u00f8yaktige avstanden kan v\u00e6re mellom 400 m og 2 km, avhengig av haiart og vannforhold. 2\/3 av haiens hjerne er dedikert til luktesansen Synke: Hvis en hai slutter \u00e5 sv\u00f8mme, ... <a title=\"Fakta om haier\" class=\"read-more\" href=\"https:\/\/www.123fakta.com\/nb\/facts-about-sharks\" aria-label=\"Les mer om fakta om haier\">Les mer<\/a><\/p>","protected":false},"author":1,"featured_media":7532,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"cybocfi_hide_featured_image":"","footnotes":""},"categories":[67,74],"tags":[120],"class_list":["post-1630","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-animals","category-aquatic-animals","tag-adsense"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Facts about sharks and shark attacks - 31 amazing facts<\/title>\n<meta name=\"description\" content=\"Fact: Sharks sink to the bottom if they stop swimming. Some species also die if they stand still. Learn more facts about sharks here.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.123fakta.com\/nb\/fakta-om-haier\/\" \/>\n<meta property=\"og:locale\" content=\"nb_NO\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Facts about sharks and shark attacks - 31 amazing facts\" \/>\n<meta property=\"og:description\" content=\"Fact: Sharks sink to the bottom if they stop swimming. Some species also die if they stand still. 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Noen arter d\u00f8r ogs\u00e5 n\u00e5r de st\u00e5r stille. L\u00e6r mer fakta om haier her.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.123fakta.com\/nb\/fakta-om-haier\/","og_locale":"nb_NO","og_type":"article","og_title":"Facts about sharks and shark attacks - 31 amazing facts","og_description":"Fact: Sharks sink to the bottom if they stop swimming. Some species also die if they stand still. 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