{"id":32666,"date":"2024-02-09T16:05:54","date_gmt":"2024-02-09T15:05:54","guid":{"rendered":"https:\/\/www.deepseareporter.com\/?p=32666"},"modified":"2024-02-15T14:18:41","modified_gmt":"2024-02-15T13:18:41","slug":"knubbsalarna-blir-farre-for-att-fisken-ar-slut","status":"publish","type":"post","link":"https:\/\/www.deepseareporter.com\/sv\/knubbsalarna-blir-farre-for-att-fisken-ar-slut\/","title":{"rendered":"Knubbs\u00e4larna blir f\u00e4rre &#8211; f\u00f6r att fisken \u00e4r slut"},"content":{"rendered":"\n<p><strong>Nu har forskare fastst\u00e4llt att knubbs\u00e4larna i Kosterhavet blir allt f\u00e4rre. Under f\u00f6rra \u00e5ret f\u00f6dde bara h\u00e4lften av honorna ungar. Det visar forskning fr\u00e5n G\u00f6teborgs universitet, efter \u00e5rets s\u00e4lr\u00e4kning.&nbsp;<\/strong><\/p>\n\n\n\n<p><strong>\u2013 Vi blev v\u00e4ldigt paffa. Man kan inte bortf\u00f6rklara de h\u00e4r l\u00e5ga sifforna \u00e5r efter \u00e5r, s\u00e4ger Karin H\u00e5rding, professor i zoologisk ekologi vid G\u00f6teborgs universitet och den som leder projektet.<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1280\" height=\"722\" src=\"https:\/\/www.deepseareporter.com\/wp-content\/uploads\/2024\/02\/Karin-Harding-1280x722.jpg\" alt=\"\" class=\"wp-image-32669\" srcset=\"https:\/\/www.deepseareporter.com\/wp-content\/uploads\/2024\/02\/Karin-Harding-1280x722.jpg 1280w, https:\/\/www.deepseareporter.com\/wp-content\/uploads\/2024\/02\/Karin-Harding-720x406.jpg 720w, https:\/\/www.deepseareporter.com\/wp-content\/uploads\/2024\/02\/Karin-Harding-768x433.jpg 768w, https:\/\/www.deepseareporter.com\/wp-content\/uploads\/2024\/02\/Karin-Harding-1536x866.jpg 1536w, https:\/\/www.deepseareporter.com\/wp-content\/uploads\/2024\/02\/Karin-Harding.jpg 1700w\" sizes=\"auto, (max-width: 1280px) 100vw, 1280px\" \/><\/figure>\n\n\n\n<p>Det \u00e4r tredje \u00e5ret i rad som antalet nyf\u00f6dda knubbs\u00e4lar i Kosterhavet minskat. Forskare har slagit fast att detta beror p\u00e5 att honorna bara f\u00f6der 250 av f\u00f6rv\u00e4ntade 500 kutar. Normalt f\u00f6der varje hona en kut runt midsommar, men kan hoppa \u00f6ver ett \u00e5r om de uts\u00e4tts f\u00f6r stress som sjukdomar eller brist p\u00e5 mat. S\u00e4larna i \u00d6stersj\u00f6n har tidigare drabbats h\u00e5rt av milj\u00f6gifter som gjorde dem sterila men har lyckats \u00e5terh\u00e4mta sig. Nu pekas i st\u00e4llet bristen p\u00e5 f\u00f6da ut som en anledning till den l\u00e5ga reproduktionen. Flygr\u00e4kningar gjorda av Naturhistoriska Riksmuseet visar att trenden ser likadan ut i hela Skagerrak och Kattegatt.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1280\" height=\"722\" src=\"https:\/\/www.deepseareporter.com\/wp-content\/uploads\/2024\/02\/forskarteamet-1280x722.jpg\" alt=\"\" class=\"wp-image-32675\" srcset=\"https:\/\/www.deepseareporter.com\/wp-content\/uploads\/2024\/02\/forskarteamet-1280x722.jpg 1280w, https:\/\/www.deepseareporter.com\/wp-content\/uploads\/2024\/02\/forskarteamet-720x406.jpg 720w, https:\/\/www.deepseareporter.com\/wp-content\/uploads\/2024\/02\/forskarteamet-768x433.jpg 768w, https:\/\/www.deepseareporter.com\/wp-content\/uploads\/2024\/02\/forskarteamet-1536x866.jpg 1536w, https:\/\/www.deepseareporter.com\/wp-content\/uploads\/2024\/02\/forskarteamet.jpg 2000w\" sizes=\"auto, (max-width: 1280px) 100vw, 1280px\" \/><\/figure>\n\n\n\n<p>\u2013 M\u00e5nga fiskarter \u00e4r \u00f6verfiskade och det finns inga starka sillbest\u00e5nd med stora fiskar l\u00e4ngre. De var en viktig stapelf\u00f6da f\u00f6r knubbs\u00e4len, s\u00e4ger Karin H\u00e5rding.<\/p>\n\n\n\n<p>Historiskt har knubbs\u00e4l jagats i stor omfattning. I slutet av 1800-talet utf\u00e4rdades skottpengar vilket ledde till att best\u00e5nden av knubbs\u00e4l minskade kraftigt. Knubbs\u00e4len \u00e4r fridlyst sedan 50 \u00e5r tillbaka men f\u00f6r tv\u00e5 \u00e5r sedan godk\u00e4nde Naturv\u00e5rdsverket licensjakt efter krav fr\u00e5n yrkesfisket.<\/p>\n\n\n\n<p>Knubbs\u00e4l i svenska vatten livn\u00e4r sig p\u00e5 ett 30-tal olika fiskarter, bland annat tobis, bl\u00e5vitling och sandsk\u00e4dda, och kan dyka till ett par hundra meters djup. Men idag finns det inga bevis p\u00e5 att knubbs\u00e4len hotar kommersiellt intressanta fiskbest\u00e5nd som sill och torsk. Yrkesfiskare riktar fr\u00e4mst in sig p\u00e5 stora fiskar medan s\u00e4len \u00e4ter liten till mellanstor fisk p\u00e5 7 till 30 centimeter, vilket fem experter p\u00e5 s\u00e4l- och fiskeekologi <a href=\"https:\/\/www.dn.se\/debatt\/skyll-inte-bristen-pa-stora-fiskar-pa-salarna\/\">skrivit<\/a> om i Dagens Nyheter.<\/p>\n\n\n\n<p>\u2013Det \u00e4r viktigt f\u00f6r marina ekosystem att det finns stora rovdjur som stora torskar \u00f6ver 40 centimeter och s\u00e4lar f\u00f6r d\u00e5 blir det b\u00e4ttre balans i ekosystemet, s\u00e4ger Karin H\u00e5rding.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1280\" height=\"722\" src=\"https:\/\/www.deepseareporter.com\/wp-content\/uploads\/2024\/02\/kosteroarna-2-1280x722.jpg\" alt=\"\" class=\"wp-image-32673\" srcset=\"https:\/\/www.deepseareporter.com\/wp-content\/uploads\/2024\/02\/kosteroarna-2-1280x722.jpg 1280w, https:\/\/www.deepseareporter.com\/wp-content\/uploads\/2024\/02\/kosteroarna-2-720x406.jpg 720w, https:\/\/www.deepseareporter.com\/wp-content\/uploads\/2024\/02\/kosteroarna-2-768x433.jpg 768w, https:\/\/www.deepseareporter.com\/wp-content\/uploads\/2024\/02\/kosteroarna-2-1536x866.jpg 1536w, https:\/\/www.deepseareporter.com\/wp-content\/uploads\/2024\/02\/kosteroarna-2.jpg 2000w\" sizes=\"auto, (max-width: 1280px) 100vw, 1280px\" \/><\/figure>\n\n\n\n<p>De stora industritr\u00e5larna har tagit s\u00e5 stora f\u00e5ngster att det saknas riktigt stor fisk i havet och det har skapat ett fenomen som kallas trofisk kaskad. En slags dominoeffekt.<\/p>\n\n\n\n<p>\u2013 De m\u00e5nga sm\u00e5fiskarna konkurrerar med varandra och blir magra, de \u00e4ter de f\u00f6r mycket sm\u00e5 kr\u00e4ftdjur. Och n\u00e4r de sm\u00e5 kr\u00e4ftdjuren minskar \u00e4ter de mindre p\u00e5 fintr\u00e5diga alger och planktonalger vilket leder till fler algblomningar, vilket m\u00e5nga forskare visat, s\u00e4ger Karin H\u00e5rding.<\/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\/2024\/02\/solbadande-knubbsalar-1280x853.jpg\" alt=\"\" class=\"wp-image-32686\" srcset=\"https:\/\/www.deepseareporter.com\/wp-content\/uploads\/2024\/02\/solbadande-knubbsalar-1280x853.jpg 1280w, https:\/\/www.deepseareporter.com\/wp-content\/uploads\/2024\/02\/solbadande-knubbsalar-720x480.jpg 720w, https:\/\/www.deepseareporter.com\/wp-content\/uploads\/2024\/02\/solbadande-knubbsalar-768x512.jpg 768w, https:\/\/www.deepseareporter.com\/wp-content\/uploads\/2024\/02\/solbadande-knubbsalar-1536x1024.jpg 1536w, https:\/\/www.deepseareporter.com\/wp-content\/uploads\/2024\/02\/solbadande-knubbsalar.jpg 2000w\" sizes=\"auto, (max-width: 1280px) 100vw, 1280px\" \/><\/figure>\n\n\n\n<p>Enligt EU:s art- och habitatdirektiv har Sverige f\u00f6rbundit sig att f\u00f6rvalta s\u00e4l p\u00e5 ett s\u00e4tt som inte till\u00e5ter att s\u00e4lpopulationen kollapsar. Detta inneb\u00e4r att s\u00e4l endast b\u00f6r jagas n\u00e4r den har en positiv tillv\u00e4xt. Om man jagar p\u00e5 best\u00e5nd som \u00e4r minskande kan det g\u00e5 snabbt utf\u00f6r. F\u00f6r att v\u00e4nda trenden s\u00e5 att fler ungar f\u00f6ds beh\u00f6ver knubbs\u00e4len mer och b\u00e4ttre mat.<\/p>\n\n\n\n<p>\u2013 S\u00e4lens framtid \u00e4r precis som det sm\u00e5skaliga fiskets helt avh\u00e4ngig om det blir minskade tr\u00e5lkvoter f\u00f6r de stora b\u00e5tarna, s\u00e5 att fisken \u00e5terh\u00e4mtar sig och kan v\u00e4xa sig stor igen. Haven har en v\u00e4ldig kapacitet att \u00e5terh\u00e4mta sig om vi bara slutar \u00f6verexploatera, s\u00e4ger Karin H\u00e5rding.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Nu har forskare fastst\u00e4llt att knubbs\u00e4larna i Kosterhavet blir allt f\u00e4rre. Under f\u00f6rra \u00e5ret f\u00f6dde bara h\u00e4lften av honorna ungar. Det visar forskning fr\u00e5n G\u00f6teborgs universitet, efter \u00e5rets s\u00e4lr\u00e4kning.  <\/p>\n<p>\u2013 Vi blev v\u00e4ldigt paffa. Man kan inte bortf\u00f6rklara de h\u00e4r l\u00e5ga sifforna \u00e5r efter \u00e5r, s\u00e4ger Karin H\u00e5rding, professor i zoologisk ekologi vid G\u00f6teborgs universitet och den som leder projektet.<\/p>\n","protected":false},"author":4,"featured_media":32667,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[581],"tags":[1304,391,1808,378,1561,622],"class_list":["post-32666","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-vastkusten","tag-goteborgs-universitet","tag-knubbsal","tag-kosterhavet","tag-saljakt","tag-skjut-salen","tag-utfiskning"],"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>Knubbs\u00e4larna blir f\u00e4rre - f\u00f6r att fisken \u00e4r slut - Deep Sea Reporter<\/title>\n<meta name=\"description\" content=\"Nu har forskare fastst\u00e4llt att knubbs\u00e4larna i Kosterhavet blir allt f\u00e4rre. 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Man kan inte bortf\u00f6rklara de h\u00e4r l\u00e5ga sifforna \u00e5r efter \u00e5r, s\u00e4ger Karin H\u00e5rding, professor i zoologisk ekologi vid G\u00f6teborgs universitet och den som leder projektet.\" \/>\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\/knubbsalarna-blir-farre-for-att-fisken-ar-slut\/\" \/>\n<meta property=\"og:locale\" content=\"sv_SE\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Knubbs\u00e4larna blir f\u00e4rre - f\u00f6r att fisken \u00e4r slut - Deep Sea Reporter\" \/>\n<meta property=\"og:description\" content=\"Nu har forskare fastst\u00e4llt att knubbs\u00e4larna i Kosterhavet blir allt f\u00e4rre. Under f\u00f6rra \u00e5ret f\u00f6dde bara h\u00e4lften av honorna ungar. Det visar forskning fr\u00e5n G\u00f6teborgs universitet, efter \u00e5rets s\u00e4lr\u00e4kning. \u2013 Vi blev v\u00e4ldigt paffa. Man kan inte bortf\u00f6rklara de h\u00e4r l\u00e5ga sifforna \u00e5r efter \u00e5r, s\u00e4ger Karin H\u00e5rding, professor i zoologisk ekologi vid G\u00f6teborgs universitet och den som leder projektet.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.deepseareporter.com\/sv\/knubbsalarna-blir-farre-for-att-fisken-ar-slut\/\" \/>\n<meta property=\"og:site_name\" content=\"Deep Sea Reporter\" \/>\n<meta property=\"article:published_time\" content=\"2024-02-09T15:05:54+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-02-15T13:18:41+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.deepseareporter.com\/wp-content\/uploads\/2024\/02\/Daire-Caroll-foto-knubbsal.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"2000\" \/>\n\t<meta property=\"og:image:height\" content=\"1385\" \/>\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\/knubbsalarna-blir-farre-for-att-fisken-ar-slut\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.deepseareporter.com\/sv\/knubbsalarna-blir-farre-for-att-fisken-ar-slut\/\"},\"author\":{\"name\":\"Lena Scherman\",\"@id\":\"https:\/\/www.deepseareporter.com\/#\/schema\/person\/8440c67b5dda5c5ae6c70162fedbd434\"},\"headline\":\"Knubbs\u00e4larna blir f\u00e4rre &#8211; f\u00f6r att fisken \u00e4r slut\",\"datePublished\":\"2024-02-09T15:05:54+00:00\",\"dateModified\":\"2024-02-15T13:18:41+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.deepseareporter.com\/sv\/knubbsalarna-blir-farre-for-att-fisken-ar-slut\/\"},\"wordCount\":629,\"publisher\":{\"@id\":\"https:\/\/www.deepseareporter.com\/#organization\"},\"image\":{\"@id\":\"https:\/\/www.deepseareporter.com\/sv\/knubbsalarna-blir-farre-for-att-fisken-ar-slut\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.deepseareporter.com\/wp-content\/uploads\/2024\/02\/Daire-Caroll-foto-knubbsal.jpg\",\"keywords\":[\"G\u00f6teborgs universitet\",\"knubbs\u00e4l\",\"kosterhavet\",\"s\u00e4ljakt\",\"Skjut s\u00e4len\",\"Utfiskning\"],\"articleSection\":[\"V\u00e4stkusten\"],\"inLanguage\":\"sv-SE\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.deepseareporter.com\/sv\/knubbsalarna-blir-farre-for-att-fisken-ar-slut\/\",\"url\":\"https:\/\/www.deepseareporter.com\/sv\/knubbsalarna-blir-farre-for-att-fisken-ar-slut\/\",\"name\":\"Knubbs\u00e4larna blir f\u00e4rre - f\u00f6r att fisken \u00e4r slut - Deep Sea Reporter\",\"isPartOf\":{\"@id\":\"https:\/\/www.deepseareporter.com\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/www.deepseareporter.com\/sv\/knubbsalarna-blir-farre-for-att-fisken-ar-slut\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/www.deepseareporter.com\/sv\/knubbsalarna-blir-farre-for-att-fisken-ar-slut\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.deepseareporter.com\/wp-content\/uploads\/2024\/02\/Daire-Caroll-foto-knubbsal.jpg\",\"datePublished\":\"2024-02-09T15:05:54+00:00\",\"dateModified\":\"2024-02-15T13:18:41+00:00\",\"description\":\"Nu har forskare fastst\u00e4llt att knubbs\u00e4larna i Kosterhavet blir allt f\u00e4rre. 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