{"id":31376,"date":"2023-12-18T14:30:21","date_gmt":"2023-12-18T13:30:21","guid":{"rendered":"https:\/\/www.deepseareporter.com\/?p=31376"},"modified":"2023-12-18T14:44:20","modified_gmt":"2023-12-18T13:44:20","slug":"flera-stora-djur-i-ostersjon-har-magrat","status":"publish","type":"post","link":"https:\/\/www.deepseareporter.com\/sv\/flera-stora-djur-i-ostersjon-har-magrat\/","title":{"rendered":"Flera stora djur i \u00d6stersj\u00f6n har magrat"},"content":{"rendered":"\n<p><strong>Magrare torskar, sillgrisslor och s\u00e4lar. Sl\u00f6a och r\u00f6dfl\u00e4ckiga laxar. Flera av \u00d6stersj\u00f6ns stora djur pressas av oh\u00e4lsa och nya milj\u00f6gifter, enligt en ny rapport.<\/strong><\/p>\n\n\n\n<p><strong>Men f\u00f6r flera arter g\u00e5r det ganska bra \u2013 och f\u00f6r en \u00e4r utvecklingen en ren framg\u00e5ngssaga.<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1280\" height=\"856\" src=\"https:\/\/www.deepseareporter.com\/wp-content\/uploads\/2023\/12\/ostersjdjur-3-bilder-1280x856.jpg\" alt=\"\" class=\"wp-image-31381\" srcset=\"https:\/\/www.deepseareporter.com\/wp-content\/uploads\/2023\/12\/ostersjdjur-3-bilder-1280x856.jpg 1280w, https:\/\/www.deepseareporter.com\/wp-content\/uploads\/2023\/12\/ostersjdjur-3-bilder-720x481.jpg 720w, https:\/\/www.deepseareporter.com\/wp-content\/uploads\/2023\/12\/ostersjdjur-3-bilder-768x513.jpg 768w, https:\/\/www.deepseareporter.com\/wp-content\/uploads\/2023\/12\/ostersjdjur-3-bilder-1536x1027.jpg 1536w, https:\/\/www.deepseareporter.com\/wp-content\/uploads\/2023\/12\/ostersjdjur-3-bilder.jpg 2000w\" sizes=\"auto, (max-width: 1280px) 100vw, 1280px\" \/><figcaption class=\"wp-element-caption\">Torskar, sillgrisslor och s\u00e4lar finns bland de djur som p\u00e5verkas av milj\u00f6n i \u00d6stersj\u00f6n. Foto: Mary Evans Picture\/Roland Johansson\/Torbj\u00f6rn Jacobsson\/TT <\/figcaption><\/figure>\n\n\n\n<p>Trots att de lever i ett av v\u00e4rldens mest f\u00f6rorenade hav \u2013 \u00f6verg\u00f6tt, syrefattigt och utsatt f\u00f6r milj\u00f6gifter \u2013 s\u00e5 g\u00e5r det hyfsat bra f\u00f6r flera av de st\u00f6rre arterna i \u00d6stersj\u00f6n.<\/p>\n\n\n\n<p>Det visar den nya rapporten fr\u00e5n \u00d6stersj\u00f6centrum vid Stockholms universitet som sammanst\u00e4llt den senaste forskningen och data fr\u00e5n milj\u00f6\u00f6vervakning r\u00f6rande nio av \u00d6stersj\u00f6ns stora d\u00e4ggdjur, fiskar och sj\u00f6f\u00e5glar.<\/p>\n\n\n\n<p>B\u00e5de gr\u00e5s\u00e4l och vikare har numera stabila populationer efter att det tidigare sett dystert ut.<\/p>\n\n\n\n<p>Likadant med sillgrisslorna, som h\u00e4ckar p\u00e5 klippbranter och \u00e4r k\u00e4nda f\u00f6r sina ungars d\u00f6dsf\u00f6raktande hopp l\u00e4ngs branterna n\u00e4r de l\u00e4mnar f\u00f6r\u00e4ldrahemmet. P\u00e5 Stora Karls\u00f6, artens starkaste f\u00e4ste i \u00d6stersj\u00f6n, har populationen tredubblats sedan 1980-talet.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1280\" height=\"881\" src=\"https:\/\/www.deepseareporter.com\/wp-content\/uploads\/2023\/12\/pingviner-1280x881.jpg\" alt=\"\" class=\"wp-image-31383\" srcset=\"https:\/\/www.deepseareporter.com\/wp-content\/uploads\/2023\/12\/pingviner-1280x881.jpg 1280w, https:\/\/www.deepseareporter.com\/wp-content\/uploads\/2023\/12\/pingviner-720x495.jpg 720w, https:\/\/www.deepseareporter.com\/wp-content\/uploads\/2023\/12\/pingviner-768x528.jpg 768w, https:\/\/www.deepseareporter.com\/wp-content\/uploads\/2023\/12\/pingviner-1536x1057.jpg 1536w, https:\/\/www.deepseareporter.com\/wp-content\/uploads\/2023\/12\/pingviner.jpg 2000w\" sizes=\"auto, (max-width: 1280px) 100vw, 1280px\" \/><figcaption class=\"wp-element-caption\">Sillgrisslorna, h\u00e4r p\u00e5 Stora Karls\u00f6 d\u00e4r det st\u00f6rsta best\u00e5ndet finns, har blivit betydligt fler \u2013 men n\u00e5got st\u00f6r deras h\u00e4lsa och ungarna har minskat i vikt. Foto: Roland Johansson\/TT Arkivbild.<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Algblomning som st\u00f6r?<\/h2>\n\n\n\n<p>Samtidigt ser allt l\u00e5ngtifr\u00e5n ljust ut. En tydlig trend, enligt rapporten, \u00e4r att m\u00e5nga av arterna i \u00d6stersj\u00f6n blivit allt magrare \u2013 d\u00e4ribland gr\u00e5s\u00e4len, sillgrisslan, torsken och sillen\/str\u00f6mmingen.<\/p>\n\n\n\n<p>Varf\u00f6r vet forskarna inte s\u00e4kert. N\u00e4r det g\u00e4ller torsk och sill finns misstankar om brist p\u00e5 f\u00f6da, men det tror inte Henrik Sved\u00e4ng, forskare i marinekologi vid Stockholms universitet, \u00e4r orsaken.<\/p>\n\n\n\n<p>&#8211; Jag tycker att vi inte har n\u00e5gon bra f\u00f6rklaring i dag, s\u00e4ger han.<\/p>\n\n\n\n<p>Men en trolig hypotes, enligt Sved\u00e4ng, \u00e4r att algblomningen har ett finger med i spelet. En \u00f6kad m\u00e4ngd bl\u00e5gr\u00f6nalger kan rubba n\u00e4ringskedjan och g\u00f6ra f\u00f6dan mer n\u00e4ringsfattig f\u00f6r torsk och sill.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Sl\u00f6a laxar<\/h2>\n\n\n\n<p>Att best\u00e5nden av b\u00e5da fiskarterna \u00e4r p\u00e5 kritiskt l\u00e5ga niv\u00e5er beror mycket p\u00e5 \u00f6verfiske enligt rapporten. Men \u00e4ven att de blivit spinkigare oroar forskarna.<\/p>\n\n\n\n<p>&#8211; F\u00f6r torsken g\u00f6r det att den blir sk\u00f6rare och sjukare, och den lever inte lika l\u00e4nge, s\u00e4ger Henrik Sved\u00e4ng.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1280\" height=\"917\" src=\"https:\/\/www.deepseareporter.com\/wp-content\/uploads\/2023\/12\/sal-i-vatten-1280x917.jpg\" alt=\"\" class=\"wp-image-31385\" srcset=\"https:\/\/www.deepseareporter.com\/wp-content\/uploads\/2023\/12\/sal-i-vatten-1280x917.jpg 1280w, https:\/\/www.deepseareporter.com\/wp-content\/uploads\/2023\/12\/sal-i-vatten-720x516.jpg 720w, https:\/\/www.deepseareporter.com\/wp-content\/uploads\/2023\/12\/sal-i-vatten-768x550.jpg 768w, https:\/\/www.deepseareporter.com\/wp-content\/uploads\/2023\/12\/sal-i-vatten-1536x1101.jpg 1536w, https:\/\/www.deepseareporter.com\/wp-content\/uploads\/2023\/12\/sal-i-vatten.jpg 2000w\" sizes=\"auto, (max-width: 1280px) 100vw, 1280px\" \/><figcaption class=\"wp-element-caption\">Betydligt fler gr\u00e5s\u00e4lar simmar i \u00d6stersj\u00f6n nu \u00e4n f\u00f6r ett par decennier sedan, men deras lager av sp\u00e4ck har minskat. Forskning visar \u00e4ven p\u00e5 h\u00f6ga halter kvicksilverhalter hos vissa. Foto: Torbj\u00f6rn Jacobsson\/TT Arkivbild.<\/figcaption><\/figure>\n\n\n\n<p>F\u00f6r sillgrisslans del kan det handla om att en \u00f6kad konkurrens om huvudf\u00f6dan skarpsill som g\u00f6r att ungarna blivit tunnare.<\/p>\n\n\n\n<p>Desto b\u00e4ttre g\u00e5r det f\u00f6r de vilda laxarna, p\u00e5 s\u00e5 vis att best\u00e5nden \u00f6kat generellt. Samtidigt har laxarna p\u00e5 senare \u00e5r f\u00e5tt flera nya h\u00e4lsoproblem s\u00e5som r\u00f6da utslag, bl\u00f6dningar och svampinfektioner. M\u00e5nga \u00e4r dessutom sl\u00f6a. Men orsakerna \u00e4r oklara.<\/p>\n\n\n\n<p>Andra v\u00e4xande hot mot flera arter som lyfts fram i rapporten \u00e4r det allt varmare vattnet, liksom nya typer av milj\u00f6gifter.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Gift fr\u00e5n bild\u00e4ck<\/h2>\n\n\n\n<p>Medan halterna av klassiska milj\u00f6gifter som DDT och PCB, som var n\u00e4ra att ta kn\u00e4cken p\u00e5 s\u00e4larna p\u00e5 70- och 80-talet, \u00e4r p\u00e5 tillbakag\u00e5ng s\u00e5 \u00f6kar flera andra kemikalier.<\/p>\n\n\n\n<p>Ett exempel \u00e4r ett \u00e4mne som anv\u00e4nds flitigt i bild\u00e4ck och \u00e4r mycket toxiskt f\u00f6r levande varelser, enligt Andriy Rebryk, forskare i kemi vid Ume\u00e5 universitet. Ett annat \u00e4r flamskyddsmedel kallade dekloraner, som bland annat hittats i havs\u00f6rnar och sillgrissle\u00e4gg.<\/p>\n\n\n\n<p>Ett bekymmer \u00e4r \u00e4ven de m\u00e5nga nya kemikalier som anv\u00e4nds inom industrin och d\u00e4r milj\u00f6effekterna \u00e4nnu \u00e4r oklara. Andriy Rebryks forskning visar att det finns en rad potentiellt h\u00e4lso- och milj\u00f6farliga \u00e4mnen som ackumulerats hos exempelvis tumlare och havs\u00f6rn.<\/p>\n\n\n\n<p>&#8211; Problemet \u00e4r att n\u00e4r de v\u00e4l b\u00f6rjat spridas i naturen \u00e4r de v\u00e4ldigt sv\u00e5ra att bli av med, s\u00e4ger Andriy Rebryk.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1280\" height=\"712\" src=\"https:\/\/www.deepseareporter.com\/wp-content\/uploads\/2023\/12\/tumlare-1280x712.jpg\" alt=\"\" class=\"wp-image-31387\" srcset=\"https:\/\/www.deepseareporter.com\/wp-content\/uploads\/2023\/12\/tumlare-1280x712.jpg 1280w, https:\/\/www.deepseareporter.com\/wp-content\/uploads\/2023\/12\/tumlare-720x400.jpg 720w, https:\/\/www.deepseareporter.com\/wp-content\/uploads\/2023\/12\/tumlare-768x427.jpg 768w, https:\/\/www.deepseareporter.com\/wp-content\/uploads\/2023\/12\/tumlare.jpg 1435w\" sizes=\"auto, (max-width: 1280px) 100vw, 1280px\" \/><figcaption class=\"wp-element-caption\">\u00d6stersj\u00f6ns enda permanentboende val, tumlaren, klassas som akut hotad. Foto: Paula Olson\/AP\/TT Arkivbild.<\/figcaption><\/figure>\n\n\n\n<p>Trots hotet fr\u00e5n nya gifter kan utvecklingen f\u00f6r havs\u00f6rnen beskrivas framg\u00e5ngssaga: P\u00e5 70-talet fanns runt 70 par l\u00e4ngs kusterna \u2013 de flesta sterila p\u00e5 grund av milj\u00f6gifter. Nu sv\u00e4var gott om havs\u00f6rn fram \u00f6ver svenska vatten, 1&nbsp;200 par h\u00e4ckade i fjol varav merparten i havsmilj\u00f6.<\/p>\n\n\n\n<p>Att trenden v\u00e4nde och \u00f6verlevnaden \u00f6kade berodde mycket p\u00e5 att volont\u00e4rer gav \u00f6rnarna giftfri mat.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1280\" height=\"853\" src=\"https:\/\/www.deepseareporter.com\/wp-content\/uploads\/2023\/12\/havsorn-1280x853.jpg\" alt=\"\" class=\"wp-image-31379\" srcset=\"https:\/\/www.deepseareporter.com\/wp-content\/uploads\/2023\/12\/havsorn-1280x853.jpg 1280w, https:\/\/www.deepseareporter.com\/wp-content\/uploads\/2023\/12\/havsorn-720x480.jpg 720w, https:\/\/www.deepseareporter.com\/wp-content\/uploads\/2023\/12\/havsorn-768x512.jpg 768w, https:\/\/www.deepseareporter.com\/wp-content\/uploads\/2023\/12\/havsorn-1536x1024.jpg 1536w, https:\/\/www.deepseareporter.com\/wp-content\/uploads\/2023\/12\/havsorn.jpg 2000w\" sizes=\"auto, (max-width: 1280px) 100vw, 1280px\" \/><figcaption class=\"wp-element-caption\">Havs\u00f6rnarna har g\u00e5tt fr\u00e5n bottenniv\u00e5er till att vara relativt vanliga m\u00e5nga h\u00e5ll l\u00e4ngs \u00d6stersj\u00f6kusten. Baksidan \u00e4r att bland annat sillgrisslan hotas av deras framg\u00e5ng. Foto: Stian Lysberg Solum\/TT\/NTB Arkivbild.<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1280\" height=\"817\" src=\"https:\/\/www.deepseareporter.com\/wp-content\/uploads\/2023\/12\/andmamma-1280x817.jpg\" alt=\"\" class=\"wp-image-31377\" srcset=\"https:\/\/www.deepseareporter.com\/wp-content\/uploads\/2023\/12\/andmamma-1280x817.jpg 1280w, https:\/\/www.deepseareporter.com\/wp-content\/uploads\/2023\/12\/andmamma-720x460.jpg 720w, https:\/\/www.deepseareporter.com\/wp-content\/uploads\/2023\/12\/andmamma-768x490.jpg 768w, https:\/\/www.deepseareporter.com\/wp-content\/uploads\/2023\/12\/andmamma-1536x981.jpg 1536w, https:\/\/www.deepseareporter.com\/wp-content\/uploads\/2023\/12\/andmamma.jpg 2000w\" sizes=\"auto, (max-width: 1280px) 100vw, 1280px\" \/><figcaption class=\"wp-element-caption\">En ejderhona simmar med sina ungar. Vid \u00d6stersj\u00f6n har Ejdern minskat med 50 procent sedan 1990-talet. Foto: Hasse Holmberg\/TT Arkivbild.<\/figcaption><\/figure>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Magrare torskar, sillgrisslor och s\u00e4lar. Sl\u00f6a och r\u00f6dfl\u00e4ckiga laxar. Flera av \u00d6stersj\u00f6ns stora djur pressas av oh\u00e4lsa och nya milj\u00f6gifter, enligt en ny rapport.<br \/>\nMen f\u00f6r flera arter g\u00e5r det ganska bra \u2013 och f\u00f6r en \u00e4r utvecklingen en ren framg\u00e5ngssaga.<\/p>\n","protected":false},"author":4,"featured_media":31383,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[579],"tags":[1679,869,1196,234],"class_list":["post-31376","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ostersjon","tag-marina-daggdjur","tag-miljogifter","tag-ostersjon-3","tag-torsk"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.0 (Yoast SEO v27.0) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Flera stora djur i \u00d6stersj\u00f6n har magrat - Deep Sea Reporter<\/title>\n<meta name=\"description\" content=\"Magrare torskar, sillgrisslor och s\u00e4lar. Sl\u00f6a och r\u00f6dfl\u00e4ckiga laxar. Flera av \u00d6stersj\u00f6ns stora djur pressas av oh\u00e4lsa och nya milj\u00f6gifter, enligt en ny rapport.Men f\u00f6r flera arter g\u00e5r det ganska bra \u2013 och f\u00f6r en \u00e4r utvecklingen en ren framg\u00e5ngssaga.\" \/>\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.deepseareporter.com\/sv\/flera-stora-djur-i-ostersjon-har-magrat\/\" \/>\n<meta property=\"og:locale\" content=\"sv_SE\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Flera stora djur i \u00d6stersj\u00f6n har magrat - Deep Sea Reporter\" \/>\n<meta property=\"og:description\" content=\"Magrare torskar, sillgrisslor och s\u00e4lar. Sl\u00f6a och r\u00f6dfl\u00e4ckiga laxar. Flera av \u00d6stersj\u00f6ns stora djur pressas av oh\u00e4lsa och nya milj\u00f6gifter, enligt en ny rapport.Men f\u00f6r flera arter g\u00e5r det ganska bra \u2013 och f\u00f6r en \u00e4r utvecklingen en ren framg\u00e5ngssaga.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.deepseareporter.com\/sv\/flera-stora-djur-i-ostersjon-har-magrat\/\" \/>\n<meta property=\"og:site_name\" content=\"Deep Sea Reporter\" \/>\n<meta property=\"article:published_time\" content=\"2023-12-18T13:30:21+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2023-12-18T13:44:20+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.deepseareporter.com\/wp-content\/uploads\/2023\/12\/pingviner.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"2000\" \/>\n\t<meta property=\"og:image:height\" content=\"1376\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Lena Scherman\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Skriven av\" \/>\n\t<meta name=\"twitter:data1\" content=\"Lena Scherman\" \/>\n\t<meta name=\"twitter:label2\" content=\"Ber\u00e4knad l\u00e4stid\" \/>\n\t<meta name=\"twitter:data2\" content=\"5 minuter\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.deepseareporter.com\/sv\/flera-stora-djur-i-ostersjon-har-magrat\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.deepseareporter.com\/sv\/flera-stora-djur-i-ostersjon-har-magrat\/\"},\"author\":{\"name\":\"Lena Scherman\",\"@id\":\"https:\/\/www.deepseareporter.com\/#\/schema\/person\/8440c67b5dda5c5ae6c70162fedbd434\"},\"headline\":\"Flera stora djur i \u00d6stersj\u00f6n har magrat\",\"datePublished\":\"2023-12-18T13:30:21+00:00\",\"dateModified\":\"2023-12-18T13:44:20+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.deepseareporter.com\/sv\/flera-stora-djur-i-ostersjon-har-magrat\/\"},\"wordCount\":897,\"publisher\":{\"@id\":\"https:\/\/www.deepseareporter.com\/#organization\"},\"image\":{\"@id\":\"https:\/\/www.deepseareporter.com\/sv\/flera-stora-djur-i-ostersjon-har-magrat\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.deepseareporter.com\/wp-content\/uploads\/2023\/12\/pingviner.jpg\",\"keywords\":[\"marina d\u00e4ggdjur\",\"Milj\u00f6gifter\",\"\u00f6stersj\u00f6n\",\"Torsk\"],\"articleSection\":[\"\u00d6stersj\u00f6n\"],\"inLanguage\":\"sv-SE\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.deepseareporter.com\/sv\/flera-stora-djur-i-ostersjon-har-magrat\/\",\"url\":\"https:\/\/www.deepseareporter.com\/sv\/flera-stora-djur-i-ostersjon-har-magrat\/\",\"name\":\"Flera stora djur i \u00d6stersj\u00f6n har magrat - Deep Sea Reporter\",\"isPartOf\":{\"@id\":\"https:\/\/www.deepseareporter.com\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/www.deepseareporter.com\/sv\/flera-stora-djur-i-ostersjon-har-magrat\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/www.deepseareporter.com\/sv\/flera-stora-djur-i-ostersjon-har-magrat\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.deepseareporter.com\/wp-content\/uploads\/2023\/12\/pingviner.jpg\",\"datePublished\":\"2023-12-18T13:30:21+00:00\",\"dateModified\":\"2023-12-18T13:44:20+00:00\",\"description\":\"Magrare torskar, sillgrisslor och s\u00e4lar. 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