{"id":1660,"date":"2014-05-24T08:29:47","date_gmt":"2014-05-24T08:29:47","guid":{"rendered":"http:\/\/www.123fakta.com\/da\/?p=1660"},"modified":"2026-03-19T10:38:27","modified_gmt":"2026-03-19T10:38:27","slug":"fakta-om-blahvaler","status":"publish","type":"post","link":"https:\/\/www.123fakta.com\/nb\/facts-about-blue-whales","title":{"rendered":"Fakta om bl\u00e5hvaler"},"content":{"rendered":"<ol>\n<li><strong>St\u00f8rste dyr:<\/strong>\u00a0Bl\u00e5hvalen er det st\u00f8rste dyret som noen gang har eksistert p\u00e5 jorden. Bl\u00e5hvalen kan bli opptil 33 meter lang og veie opptil 200 tonn. Tungen til en bl\u00e5hval kan veie like mye som et <a href=\"https:\/\/www.123fakta.com\/nb\/fakta-om-elefanter\/\">Elefant<\/a> - og hjertet like mye som en bil<\/li>\n<li><strong>Pattedyr:<\/strong>\u00a0Selv om bl\u00e5hvalen lever i havets dyp, m\u00e5 den som alle andre pattedyr opp til overflaten for \u00e5 f\u00e5 luft. Ved vannoverflaten puster hvalene ut luft gjennom bl\u00e5sehullet og lager en sky av vanndamp under trykk (blowstone) som stiger opptil 9 meter opp i luften.<\/li>\n<li><strong>Sv\u00f8mming alene:<\/strong>\u00a0Bl\u00e5hvaler sv\u00f8mmer vanligvis alene, men av og til i par eller sm\u00e5 grupper.<\/li>\n<li class=\"no-mobile\"><strong>Hastighet:<\/strong>\u00a0Til tross for sin st\u00f8rrelse kan bl\u00e5hvalen sv\u00f8mme i hastigheter p\u00e5 opptil 55 km\/t.<\/li>\n<li><strong>Sammenkobling:<\/strong>\u00a0Bl\u00e5hvalhunner parer seg bare hvert tredje \u00e5r og er drektige i 11-12 m\u00e5neder. Hunnene f\u00e5r vanligvis bare \u00e9n kalv om gangen.<\/li>\n<li><strong>Bl\u00e5hvalunger:<\/strong>\u00a0Bl\u00e5hvalunger kan bli opptil 8 meter lange og veie opptil 2700 kg ved f\u00f8dselen. Bl\u00e5hvalunger dier sammen med moren og f\u00e5r i seg mer enn 600 liter melk per dag. I l\u00f8pet av de f\u00f8rste 7 m\u00e5nedene av livet legger bl\u00e5hvalunger p\u00e5 seg rundt 90 kg per dag.<\/li>\n<li><strong>Sm\u00e5 hjerner:<\/strong>\u00a0Bl\u00e5hvaler har relativt sm\u00e5 hjerner; de veier vanligvis rundt 6,92 kg og utgj\u00f8r ca. 0,007% av hvalens kroppsvekt.<\/li>\n<li><strong>Bevaring:<\/strong>\u00a0I 1966 ble bl\u00e5hvalen fredet av Den internasjonale hvalfangstkommisjonen, men ulovlig jakt har p\u00e5g\u00e5tt siden da. I dag regnes bl\u00e5hvalen fortsatt som en truet art.<\/li>\n<li><strong>Fiender:<\/strong>\u00a0P\u00e5 grunn av sin enorme st\u00f8rrelse har bl\u00e5hvalen sv\u00e6rt f\u00e5 naturlige fiender. <a href=\"https:\/\/www.123fakta.com\/nb\/fakta-om-haier\/\">haier<\/a> og spekkhoggere er noen av de eneste (og spekkhoggeren er bl\u00e5hvalens eneste <a href=\"https:\/\/www.123fakta.com\/nb\/fakta-om-rovdyr\/\">rovdyr<\/a>). 25% av alle voksne bl\u00e5hvaler har arr etter spekkhoggerangrep. I tillegg d\u00f8r en rekke bl\u00e5hvaler som f\u00f8lge av menneskelig jakt og kollisjoner med store skip.<\/li>\n<li><strong>Nummer:<\/strong>\u00a0Det ansl\u00e5s at det finnes mellom 10 000 og 25 000 bl\u00e5hvaler i verden i dag. P\u00e5 slutten av 1800-tallet regner man med at det fantes rundt 220 000 bl\u00e5hvaler i havet rundt Antarktis. Den store nedgangen i antall bl\u00e5hvaler skyldes hovedsakelig menneskelig overbeskatning p\u00e5 1920- og 1930-tallet, da det ble fanget opptil 30 000 hvaler i \u00e5ret. Bl\u00e5hvalbestanden var trolig p\u00e5 sitt laveste i 1990, da den totale bestanden ble ansl\u00e5tt til \u00e5 v\u00e6re mindre enn 10 000 individer.<\/li>\n<\/ol>\n<figure id=\"attachment_7507\" aria-describedby=\"caption-attachment-7507\" style=\"width: 990px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-7507\" src=\"https:\/\/www.123fakta.com\/wp-content\/uploads\/blaahval-fakta-2.jpg\" alt=\"Fakta: Bl\u00e5hvalen puster ut vind gjennom bl\u00e5sehullet i vannoverflaten.\" width=\"1000\" height=\"1393\" srcset=\"https:\/\/www.123fakta.com\/wp-content\/uploads\/blaahval-fakta-2.jpg 1000w, https:\/\/www.123fakta.com\/wp-content\/uploads\/blaahval-fakta-2-215x300.jpg 215w, https:\/\/www.123fakta.com\/wp-content\/uploads\/blaahval-fakta-2-735x1024.jpg 735w, https:\/\/www.123fakta.com\/wp-content\/uploads\/blaahval-fakta-2-768x1070.jpg 768w, https:\/\/www.123fakta.com\/wp-content\/uploads\/blaahval-fakta-2-9x12.jpg 9w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><figcaption id=\"caption-attachment-7507\" class=\"wp-caption-text\">Kildeangivelse: NOAA + Andreas Tille - Wikipedia.org<\/figcaption><\/figure>\n<p style=\"text-align: center;\"><em><strong>Fakta: Bl\u00e5hvalen er et pattedyr og m\u00e5 derfor opp til overflaten for \u00e5 f\u00e5 luft. P\u00e5 overflaten puster den gjennom bl\u00e5sehullet<\/strong><\/em><\/p>\n<h2>Bl\u00e5hvalens mat<\/h2>\n<ul>\n<li><strong>Barder:<\/strong>\u00a0Bl\u00e5hvalen er en bardehval, noe som betyr at den har 540-790 svarte bardeplater som kan bli opptil 1 meter lange. Bardene henger ned fra overkjeven og brukes til \u00e5 filtrere mat (plankton - ogs\u00e5 kalt \"lyskreps\" eller \"krill\") fra vannet som str\u00f8mmer gjennom bl\u00e5hvalens munn.<\/li>\n<li><strong>Krill:<\/strong>\u00a0Bl\u00e5hvaler kan spise opptil 4 tonn krill per dag, og magen kan romme rundt 1 tonn krill.<\/li>\n<li><strong>Kalorier:<\/strong>\u00a0I l\u00f8pet av \u00e9n munnfull f\u00e5r bl\u00e5hvalen i seg nesten en halv million kilokalorier (kcal). En voksen bl\u00e5hval trenger 1,5 millioner kilokalorier (kcal) per dag.<\/li>\n<\/ul>\n<figure id=\"attachment_7511\" aria-describedby=\"caption-attachment-7511\" style=\"width: 790px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-7511\" src=\"https:\/\/www.123fakta.com\/wp-content\/uploads\/blue-whale.jpg\" alt=\"Fakta: Bl\u00e5hvaler sv\u00f8mmer vanligvis alene.\" width=\"800\" height=\"530\" srcset=\"https:\/\/www.123fakta.com\/wp-content\/uploads\/blue-whale.jpg 800w, https:\/\/www.123fakta.com\/wp-content\/uploads\/blue-whale-300x199.jpg 300w, https:\/\/www.123fakta.com\/wp-content\/uploads\/blue-whale-768x509.jpg 768w, https:\/\/www.123fakta.com\/wp-content\/uploads\/blue-whale-18x12.jpg 18w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption id=\"caption-attachment-7511\" class=\"wp-caption-text\">Attribusjon: Gregory \"Slobirdr\" Smith<\/figcaption><\/figure>\n<p style=\"text-align: center;\"><em><strong>Bl\u00e5hvalen sv\u00f8mmer vanligvis alene, men kan ogs\u00e5 sv\u00f8mme i par eller sm\u00e5 grupper.<\/strong><\/em><\/p>\n<ul>\n<li><strong>Fargerik krakk:<\/strong>\u00a0Fordi det er s\u00e5 mye krill i bl\u00e5hvalenes diett, er avf\u00f8ringen deres regnbuefarget.<\/li>\n<li><strong>Store biter:<\/strong>\u00a0Bl\u00e5hvaler kan holde opptil 110 tonn vann i munnen om gangen.<\/li>\n<li><strong>Dykking:<\/strong>\u00a0Fordi krill hovedsakelig finnes dypt nede i havet, dykker bl\u00e5hvalen vanligvis under 100 meter for \u00e5 fange krill. Et dykk varer vanligvis i 10 minutter, men dykk p\u00e5 20 minutter er ogs\u00e5 vanlig. Bl\u00e5hvaler har ogs\u00e5 en tendens til \u00e5 dykke utelukkende for \u00e5 finne mat om dagen og spise ved overflaten om natten.<\/li>\n<\/ul>\n<p>Du kan ogs\u00e5 se v\u00e5r <a href=\"https:\/\/www.123fakta.com\/nb\/fakta-om-hvaler\/\">artikkel om hvaler her<\/a>.<\/p>","protected":false},"excerpt":{"rendered":"<p>Det st\u00f8rste dyret: Bl\u00e5hvalen er det st\u00f8rste dyret som noensinne har eksistert p\u00e5 jorden. Bl\u00e5hvalen kan bli opptil 33 meter lang og veie opp til 200 tonn. Tungen til en bl\u00e5hval kan veie like mye som en elefant - og hjertet like mye som en bil Pattedyr: Selv om bl\u00e5hvalen spiser i ... <a title=\"Fakta om bl\u00e5hvaler\" class=\"read-more\" href=\"https:\/\/www.123fakta.com\/nb\/facts-about-blue-whales\" aria-label=\"Les mer om fakta om bl\u00e5hvalen\">Les mer<\/a><\/p>","protected":false},"author":1,"featured_media":7509,"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-1660","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 blue whales - Size, weight, food, predators, etc.<\/title>\n<meta name=\"description\" content=\"Fact: Blue whales can grow up to 33 m long and weigh a maximum of 200 tons. 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