{"id":43931,"date":"2026-06-15T20:40:05","date_gmt":"2026-06-15T18:40:05","guid":{"rendered":"https:\/\/www.deepseareporter.com\/?p=43931"},"modified":"2026-06-15T20:40:07","modified_gmt":"2026-06-15T18:40:07","slug":"badgasternas-fiende-kan-bli-havets-falukorv","status":"publish","type":"post","link":"https:\/\/www.deepseareporter.com\/sv\/badgasternas-fiende-kan-bli-havets-falukorv\/","title":{"rendered":"Badg\u00e4sternas fiende kan bli &#8221;havets falukorv&#8221;"},"content":{"rendered":"\n<p><strong>De \u00e4r vassa och sprider sig snabbt l\u00e4ngs den svenska v\u00e4stkusten. Det invasiva stillahavsostronet f\u00f6r\u00e4ndrar ekosystemet och f\u00f6rst\u00f6r f\u00f6r badg\u00e4ster. Nu g\u00f6rs stora satsningar f\u00f6r att ta tillvara det ifr\u00e5gasatta bl\u00f6tdjuret.<\/strong><\/p>\n\n\n\n<p><strong>&#8211; De \u00e4r som havets falukorv, s\u00e4ger \u00c5sa Strand, marin naturv\u00e5rdsf\u00f6rvaltare p\u00e5 l\u00e4nsstyrelsen.<\/strong><\/p>\n\n\n\n<p>Sommaren 2007 d\u00f6k de pl\u00f6tsligt upp. Det rapporterades om stora m\u00e4ngder l\u00e4ngs kusten i Bohusl\u00e4n. Magallana gigas, stillahavsostron, eller japanska j\u00e4tteostron. Ett invasivt ostron som spred sig snabbt. Hur skulle det stoppas?<\/p>\n\n\n\n<p>\u00c5sa Strand, p\u00e5 l\u00e4nsstyrelsen i V\u00e4stra G\u00f6taland, intresserade sig tidigt f\u00f6r de nya ostronen. Som nybliven forskare skulle hon studera deras effekter p\u00e5 ekosystemet.<\/p>\n\n\n\n<p>&#8211; Men ju mer jag l\u00e4rde mig, desto sv\u00e5rare blev det att svara p\u00e5 vad som var s\u00e5 d\u00e5ligt, s\u00e4ger hon.<\/p>\n\n\n\n<p>Invasiva arter \u00e4r k\u00e4nda f\u00f6r att sl\u00e5 ut andra. Men att de skulle tr\u00e4nga bort de inhemska ostronen tycks inte st\u00e4mma.<\/p>\n\n\n\n<p>&#8211; De har olika habitat vilket betyder att de lever p\u00e5 olika djup. Det verkar inte heller som att de \u00e4ter samma sak och konkurrerar om f\u00f6dan, men det beh\u00f6ver vi forska mer p\u00e5, s\u00e4ger Svenja Hess, projektledare inom vattenbruk och invasiva arter p\u00e5 IVL Svenska Milj\u00f6institutet.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1280\" height=\"960\" src=\"https:\/\/www.deepseareporter.com\/wp-content\/uploads\/2026\/06\/260615-ttvpjatteostron1-7a4f06e7-a003nh-1280x960.jpeg\" alt=\"portr\u00e4tt p\u00e5 en glad kvinna tillsammans med en bild p\u00e5 ostron\" class=\"wp-image-43934\" srcset=\"https:\/\/www.deepseareporter.com\/wp-content\/uploads\/2026\/06\/260615-ttvpjatteostron1-7a4f06e7-a003nh-1280x960.jpeg 1280w, https:\/\/www.deepseareporter.com\/wp-content\/uploads\/2026\/06\/260615-ttvpjatteostron1-7a4f06e7-a003nh-720x540.jpeg 720w, https:\/\/www.deepseareporter.com\/wp-content\/uploads\/2026\/06\/260615-ttvpjatteostron1-7a4f06e7-a003nh-768x576.jpeg 768w, https:\/\/www.deepseareporter.com\/wp-content\/uploads\/2026\/06\/260615-ttvpjatteostron1-7a4f06e7-a003nh-1536x1152.jpeg 1536w, https:\/\/www.deepseareporter.com\/wp-content\/uploads\/2026\/06\/260615-ttvpjatteostron1-7a4f06e7-a003nh.jpeg 2000w\" sizes=\"auto, (max-width: 1280px) 100vw, 1280px\" \/><figcaption class=\"wp-element-caption\">Foto: Anna Edlund\/IVL, Christine Olsson\/TT<br>Svenja Hess jobbar med vattenbruk och invasiva arter p\u00e5 IVL Svenska Milj\u00f6institutet och ser b\u00e5de f\u00f6r- och nackdelar med de invasiva ostronen.<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-forandrar-miljoer\">F\u00f6r\u00e4ndrar milj\u00f6er<\/h2>\n\n\n\n<p>Klart \u00e4r att ostronen f\u00f6r\u00e4ndrar de marina milj\u00f6erna. N\u00e4r de bildar rev p\u00e5 mjuka bottnar f\u00f6rst\u00f6r de f\u00f6r arter som vill gr\u00e4va ner sig i sanden. De hotar ocks\u00e5 k\u00e4nsliga f\u00f6tter p\u00e5 badg\u00e4ster som sk\u00e4r sig. Samtidigt gynnar de arter som beh\u00f6ver h\u00e5rda bottnar, som bl\u00e5musslor, och \u00e4r bra p\u00e5 att rena vattnet, vilket minskar effekterna av \u00f6verg\u00f6dning.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-plus-och-minus\">Plus och minus.<\/h2>\n\n\n\n<p>I dag finns stillahavsostronet l\u00e4ngs stora delar av v\u00e4stkusten, \u00e4nda ner till Malm\u00f6. Det \u00e4r inte l\u00e4ngre n\u00e5gon som tror att det g\u00e5r att f\u00e5 bort dem, i alla fall inte norr om G\u00f6teborg.<\/p>\n\n\n\n<p>&#8211; Vi ser ocks\u00e5 att de anpassar sig bra till klimatf\u00f6r\u00e4ndringar eftersom de klarar h\u00f6gre temperaturer, s\u00e4ger Svenja Hess.<\/p>\n\n\n\n<p>I st\u00e4llet f\u00f6r att f\u00f6rs\u00f6ka utrota de invasiva ostronen i omr\u00e5den d\u00e4r de \u00e4r fullt etablerade startas initiativ f\u00f6r att nyttja dem. Ostron \u00e4r klimatsmart och nyttig mat, rik p\u00e5 bland annat protein, vitamin B12, jod, selen och zink. Bara en br\u00e5kdel av alla ostron tas tillvara.<\/p>\n\n\n\n<p>Omkring 6 ton om \u00e5ret fiskas upp i dag av de runt 30&nbsp;000 ton som finns, samtidigt som vi importerar stora m\u00e4ngder fr\u00e5n utlandet, s\u00e4ger \u00c5sa Strand.<\/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\/2026\/06\/260615-ttvpjatteostron1-7a4f06e7-a004nh-1280x853.jpeg\" alt=\"ostronbitar ligger i tre olika vita sk\u00e5lar\" class=\"wp-image-43936\" srcset=\"https:\/\/www.deepseareporter.com\/wp-content\/uploads\/2026\/06\/260615-ttvpjatteostron1-7a4f06e7-a004nh-1280x853.jpeg 1280w, https:\/\/www.deepseareporter.com\/wp-content\/uploads\/2026\/06\/260615-ttvpjatteostron1-7a4f06e7-a004nh-720x480.jpeg 720w, https:\/\/www.deepseareporter.com\/wp-content\/uploads\/2026\/06\/260615-ttvpjatteostron1-7a4f06e7-a004nh-768x512.jpeg 768w, https:\/\/www.deepseareporter.com\/wp-content\/uploads\/2026\/06\/260615-ttvpjatteostron1-7a4f06e7-a004nh-1536x1024.jpeg 1536w, https:\/\/www.deepseareporter.com\/wp-content\/uploads\/2026\/06\/260615-ttvpjatteostron1-7a4f06e7-a004nh.jpeg 2000w\" sizes=\"auto, (max-width: 1280px) 100vw, 1280px\" \/><figcaption class=\"wp-element-caption\">Foto: Christine Olsson\/TT<br>L\u00e4ngst till v\u00e4nster syns stekta, hackade invasiva stillahavsostron, snett ovanf\u00f6r r\u00e5a stillahavsostron, skal fr\u00e5n stillahavsostron, odlade fine de Claire ostron fr\u00e5n v\u00e4stkusten och ostronpulver fr\u00e5n stillahavsostron som kan anv\u00e4ndas som smakf\u00f6rst\u00e4rkare.<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-blir-kroppkakor\">Blir kroppkakor<\/h2>\n\n\n\n<p>F\u00f6r m\u00e5nga f\u00f6rknippas ostron med lyx, att avnjutas f\u00e4rska. Men stillahavsvarianten har inte gjort succ\u00e9 p\u00e5 finkrogarna, troligen eftersom de \u00e4r sv\u00e5ra att hantera.<\/p>\n\n\n\n<p>Dels v\u00e4xer de i klumpar med vassa skal och \u00e4r sv\u00e5ra att separera fr\u00e5n varandra, dels \u00e4r det sv\u00e5rt att f\u00e5 bort sanden som finns i dem. Men det finns ocks\u00e5 m\u00e5nga som ogillar ostron.<\/p>\n\n\n\n<p>&#8211; En del har sv\u00e5rt f\u00f6r ostron, fr\u00e4mst p\u00e5 grund av konsistensen. Vi f\u00f6rs\u00f6ker hitta s\u00e4tt att tillreda dem som funkar f\u00f6r m\u00e5nga, s\u00e4ger Anna Henning Moberg, verksamhetschef p\u00e5 Tors\u00e5ker g\u00e5rd, i Upplands V\u00e4sby norr om Stockholm.<\/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\/2026\/06\/260615-ttvpjatteostron1-7a4f06e7-a001nh-1280x853.jpeg\" alt=\"kvinna med f\u00f6rkl\u00e4de st\u00e5r framf\u00f6r en b\u00e4nk av rostfritt st\u00e5l och g\u00f6r mat\" class=\"wp-image-43932\" srcset=\"https:\/\/www.deepseareporter.com\/wp-content\/uploads\/2026\/06\/260615-ttvpjatteostron1-7a4f06e7-a001nh-1280x853.jpeg 1280w, https:\/\/www.deepseareporter.com\/wp-content\/uploads\/2026\/06\/260615-ttvpjatteostron1-7a4f06e7-a001nh-720x480.jpeg 720w, https:\/\/www.deepseareporter.com\/wp-content\/uploads\/2026\/06\/260615-ttvpjatteostron1-7a4f06e7-a001nh-768x512.jpeg 768w, https:\/\/www.deepseareporter.com\/wp-content\/uploads\/2026\/06\/260615-ttvpjatteostron1-7a4f06e7-a001nh-1536x1024.jpeg 1536w, https:\/\/www.deepseareporter.com\/wp-content\/uploads\/2026\/06\/260615-ttvpjatteostron1-7a4f06e7-a001nh.jpeg 2000w\" sizes=\"auto, (max-width: 1280px) 100vw, 1280px\" \/><figcaption class=\"wp-element-caption\">Foto: Christine Olsson\/TT<br>De invasiva stillahavsostronen sprider sig l\u00e4ngs v\u00e4stkusten. P\u00e5 Tors\u00e5ker g\u00e5rd f\u00f6rs\u00f6ker man hitta s\u00e4tt att ta tillvara dem. Sofia Lundvall, kock och sensorikexpert serverar kroppkakor med ostronfyllning.<\/figcaption><\/figure>\n\n\n\n<p>H\u00e4r ligger Axfoundations utvecklingscentrum f\u00f6r mat och material, d\u00e4r man tillsammans med IVL arbetar f\u00f6r att hitta nya anv\u00e4ndningsomr\u00e5den f\u00f6r stillahavsostronen.<\/p>\n\n\n\n<p>Ostronen som nu tillagas i testk\u00f6ket sk\u00f6rdades i ett pilotprojekt med gr\u00e4vskopa en decemberdag i Bohusl\u00e4n. De steks i sm\u00f6r, g\u00f6rs som fyllning i kroppkakor eller anv\u00e4nds som pulver i smakf\u00f6rst\u00e4rkare.<\/p>\n\n\n\n<p>&#8211; I projektet f\u00f6rs\u00f6ker vi hitta s\u00e4tt att anv\u00e4nda stora volymer av ostronen utan att f\u00f6rst\u00f6ra smaken och upplevelsen. Det handlar om allt fr\u00e5n att sk\u00f6rda ostronen, metoder f\u00f6r att skilja skal fr\u00e5n k\u00f6tt och rensa dem med bibeh\u00e5llen kvalitet, s\u00e4ger Anna Henning Moberg.<\/p>\n\n\n\n<p>Men utmaningar med att anv\u00e4nda superf\u00f6dan som finns i \u00f6verfl\u00f6d str\u00e4cker sig bortom stekpannorna.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-fa-som-far-fiska\">F\u00e5 som f\u00e5r fiska<\/h2>\n\n\n\n<p>Ett \u00e4r tillst\u00e5ndet att fiska dem. R\u00e4tten att plocka ostron tillh\u00f6r mark\u00e4garen, s\u00e5 den som vill fiska m\u00e5ste ha mark\u00e4garens tillst\u00e5nd. Om fler hade m\u00f6jlighet att fiska skulle det begr\u00e4nsa antalet.<\/p>\n\n\n\n<p>&#8211; Hade man f\u00e5tt till ett undantag fr\u00e5n mark\u00e4garr\u00e4tten redan n\u00e4r stillahavsostronet etablerades i Sverige hade det varit enklare. Nu finns det mots\u00e4ttningar mellan olika intressen. De som redan har kommersiell verksamhet i g\u00e5ng vill inte f\u00f6rlora den, s\u00e4ger \u00c5sa Strand.<\/p>\n\n\n\n<p>Ju mer de sprider sig desto st\u00f6rre anledning att ta vara p\u00e5 dem, menar \u00c5sa Strand, som \u00e4r medf\u00f6rfattare till en kokbok om hur ostron kan anv\u00e4ndas. Hon liknar ostronen vid havets falukorv.<\/p>\n\n\n\n<p>&#8211; Ostronen \u00e4r en otrolig proteinr\u00e5vara som \u00e4nd\u00e5 finns d\u00e4r. Med tanke p\u00e5 hur viktigt det \u00e4r med beredskap f\u00f6r livsmedel s\u00e5 blir det sl\u00f6seri att inte ta tillvara dem, s\u00e4ger \u00c5sa Strand.<\/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\/2026\/06\/260615-ttvpjatteostron1-7a4f06e7-a006nh-1280x853.jpeg\" alt=\"en man st\u00e5r och h\u00e5ller i ett j\u00e4tteostron\" class=\"wp-image-43940\" srcset=\"https:\/\/www.deepseareporter.com\/wp-content\/uploads\/2026\/06\/260615-ttvpjatteostron1-7a4f06e7-a006nh-1280x853.jpeg 1280w, https:\/\/www.deepseareporter.com\/wp-content\/uploads\/2026\/06\/260615-ttvpjatteostron1-7a4f06e7-a006nh-720x480.jpeg 720w, https:\/\/www.deepseareporter.com\/wp-content\/uploads\/2026\/06\/260615-ttvpjatteostron1-7a4f06e7-a006nh-768x512.jpeg 768w, https:\/\/www.deepseareporter.com\/wp-content\/uploads\/2026\/06\/260615-ttvpjatteostron1-7a4f06e7-a006nh-1536x1024.jpeg 1536w, https:\/\/www.deepseareporter.com\/wp-content\/uploads\/2026\/06\/260615-ttvpjatteostron1-7a4f06e7-a006nh.jpeg 2000w\" sizes=\"auto, (max-width: 1280px) 100vw, 1280px\" \/><figcaption class=\"wp-element-caption\">Foto: Christine Olsson\/TT<br>Patrik Isacsson, materialutvecklare p\u00e5 Axfoundation, testar vad som g\u00e5r att g\u00f6ra med skalen fr\u00e5n de invasiva stillahavsostronen.<\/figcaption><\/figure>\n\n\n\n<p>En bit fr\u00e5n testk\u00f6ket p\u00e5 Tors\u00e5ker g\u00e5rd ligger materialverkstaden. H\u00e4r utforskas hur \u00e4ven skalen fr\u00e5n ostronen skulle kunna tas tillvara. I bland annat Frankrike anv\u00e4nds de redan som marksten och har visat sig ha bra dr\u00e4neringsf\u00f6rm\u00e5ga. Att g\u00f6ra porslin av dem \u00e4r en annan id\u00e9.<\/p>\n\n\n\n<p>&#8211; Skalen utg\u00f6r en stor del av ostronen s\u00e5 vi vill hitta s\u00e4tt att anv\u00e4nda dem ocks\u00e5, s\u00e4ger Patrik Isacsson, materialutvecklare p\u00e5 Axfoundation.<\/p>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>De \u00e4r vassa och sprider sig snabbt l\u00e4ngs den svenska v\u00e4stkusten. Det invasiva stillahavsostronet f\u00f6r\u00e4ndrar ekosystemet och f\u00f6rst\u00f6r f\u00f6r badg\u00e4ster. Nu g\u00f6rs stora satsningar f\u00f6r att ta tillvara det ifr\u00e5gasatta bl\u00f6tdjuret.<\/p>\n<p>&#8211; De \u00e4r som havets falukorv, s\u00e4ger \u00c5sa Strand, marin naturv\u00e5rdsf\u00f6rvaltare p\u00e5 l\u00e4nsstyrelsen.<\/p>\n","protected":false},"author":4,"featured_media":43936,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[252,244,1],"tags":[867,4767,349,4768],"class_list":["post-43931","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-forskning","category-klimat-och-miljo","category-ovrigt","tag-invasiva-arter","tag-stillahavsostronet","tag-vastkusten","tag-vastra-gotaland"],"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>Badg\u00e4sternas fiende kan bli &quot;havets falukorv&quot; - Deep Sea Reporter<\/title>\n<meta name=\"description\" content=\"De \u00e4r vassa och sprider sig snabbt l\u00e4ngs den svenska v\u00e4stkusten. 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