{"id":758,"date":"2025-08-19T12:57:33","date_gmt":"2025-08-19T10:57:33","guid":{"rendered":"https:\/\/coolbluefuture.org\/?page_id=758"},"modified":"2025-11-13T11:24:43","modified_gmt":"2025-11-13T10:24:43","slug":"lesson-4","status":"publish","type":"page","link":"https:\/\/coolbluefuture.org\/da\/guide-to-regenerative-ocean-farming\/lesson-4\/","title":{"rendered":"Lektion 4"},"content":{"rendered":"Lektion 4\n\t\t\t\t\t\n<h1  data-animation-delay=\"0\" data-animation-duration=\"2\">\n\t\t\tLektion 4: Introduktion til afgr\u00f8der og dyrkning\t<\/h1>\n\t<a href=\"\" target=\"_self\" role=\"button\" aria-label=\"Lektionen er i \u00f8jeblikket tilg\u00e6ngelig p\u00e5 engelsk, dansk &amp; litauisk\">\n\t\t\t\t\t\tLessons are currently available in English, Danish &#038; Lithuanian\n\t\t\t\t\t<\/a>\n<h3  data-animation-delay=\"0\" data-animation-duration=\"1\">\n\t\t\tIntroduktion\t<\/h3>\n\t<p>In this lesson, you&#8217;ll get an in-depth look at the crops you&#8217;ll grow-seaweed and bivalves-and how to manage them through the seasonal cycle of your farm. You&#8217;ll not only learn what to grow, but how to grow it: when to plant, how to deploy your gear, how to maintain your crops, and how to harvest successfully.<\/p>\n\t\t\t\t<img decoding=\"async\" src=\"https:\/\/coolbluefuture.org\/wp-content\/uploads\/2025\/08\/DSC09309-e1755602196423.jpg\" alt=\"DSC09309\" itemprop=\"image\" height=\"800\" width=\"1200\" title=\"DSC09309\" onerror=\"this.style.display='none'\" loading=\"lazy\" \/>\n<h3>\n\t\t\tHavbondens \u00e5rshjul\t<\/h3>\n\t<p>Ocean farming runs on a seasonal rhythm. If you plan ahead and build your workflow around that cycle, you&#8217;ll avoid gear clashes, reduce stress, and increase your yields. This is your quarter-by-quarter breakdown of main activities:<\/p>\n<h4>\n\t\t\tAutumn (September-November)\t<\/h4>\n\t<p>Tid til forberedelse og udplantning.<\/p>\n<ul>\n<li aria-level=\"1\">Kelp: In your hatchery, you&#8217;ll collect spores from wild kelp, inoculate spools of twine, and grow them into juvenile kelp. If you don&#8217;t have your own hatchery, you will buy spore lines ready to be outplanted (reach out to your national <a href=\"https:\/\/coolbluefuture.org\/da\/country-facilitators\/\">(Kontakt din nationale Cool Blue Future facilitator).<\/a> for more information on how to get a hold of seeded lines in your country). Once water temperatures drop below 12\u202f\u00b0C, you&#8217;ll outplant those seeded lines at sea.<\/li>\n<li aria-level=\"1\">Shellfish: You&#8217;ll install new spat &#8211; either wild-collected or hatchery-grown &#8211; and double-check that all gear is clean, in place, and securely fastened for winter.<\/li>\n<\/ul>\n<h4>\n\t\t\tWinter (December-February)\t<\/h4>\n\t<p>Overv\u00e5gnings- og vedligeholdelsesfasen.<\/p>\n<ul>\n<li aria-level=\"1\">Kelp: Growing steadily with little intervention. You&#8217;ll visit your site weekly or after storms to check lines and inspect for tangles or biofouling.<\/li>\n<li aria-level=\"1\">Shellfish: Still feeding, but slowly. You&#8217;ll remove any ice buildup, clean gear, and keep predators off your oyster cages and mussel stockings.<\/li>\n<\/ul>\n<h4>\n\t\t\tSpring (March-May)\t<\/h4>\n\t<p>H\u00f8sts\u00e6sonen.<\/p>\n<ul>\n<li aria-level=\"1\">Kelp: You&#8217;ll harvest before the water warms above 14\u202f\u00b0C and barnacles or algae start to foul the blades.<\/li>\n<li aria-level=\"1\">Skaldyr: Den kommende generation af muslingelarver fanges p\u00e5 b\u00e6ndler (brede reb til at indfange muslingelarverne, n\u00e5r de sv\u00f8mmer rundt i vandet). Begynd at sortere og tynde ud i sidste \u00e5rs bestand og h\u00f8st eventuelt de hurtigst voksende muslinger.<\/li>\n<\/ul>\n<h4>\n\t\t\tSummer (June-August)\t<\/h4>\n\t<p>Skaldyr, skaldyr, skaldyr.<\/p>\n<ul>\n<li aria-level=\"1\">Oysters and Mussels: Growing fast. You&#8217;ll be grading, cleaning, and prepping for your primary shellfish harvest. Small mussels on collector ropes are transferred to grow-out socks for further growth.<\/li>\n<li aria-level=\"1\">Tang: Reng\u00f8r liner, repar\u00e9r ankre og forbered efter\u00e5rets s\u00e5ning. <\/li>\n<\/ul>\n<h3>\n\t\t\tTangdyrkning: Udstyr, ops\u00e6tning og teknik\t<\/h3>\n\t<p>Growing seaweed is low-cost, fast-growing, and space efficient. With the right setup, you can produce tons of edible biomass in a small area-with minimal inputs and year-round use of your gear.<\/p>\n<p>&nbsp;<\/p>\n<p>Gear you&#8217;ll use:<\/p>\n<ul>\n<li aria-level=\"1\">Longlines (30-60 meters): Nylon or polypropylene rope suspended horizontally 1-3 meters below the surface.<\/li>\n<li aria-level=\"1\">Sprederb\u00f8jler: Forhindrer sammenfiltring og holder afstand.<\/li>\n<li aria-level=\"1\">Seeded twine: 1-2 mm cotton or poly twine seeded in your hatchery and later wrapped onto main lines.<\/li>\n<li aria-level=\"1\">Buoys (15-50 liters): Keep your lines floating and under tension.<\/li>\n<li aria-level=\"1\">Anchors (20-50 kg): Secure each end of your longline. Use sand screws, deadweight, or helix anchors depending on your seabed.<\/li>\n<li aria-level=\"1\">Kniv eller rulle: Til h\u00f8st. En savtakket tangkniv er ofte tilstr\u00e6kkelig til mindre skala.<\/li>\n<\/ul>\n<p>G\u00e5 til <a href=\"https:\/\/coolbluefuture.org\/da\/guide-to-regenerative-ocean-farming\/lesson-3\/\">lektion 3 om ops\u00e6tning af en havmark<\/a>\u00a0for mere info om hvordan en havmark skrues sammen.<\/p>\n<h4  data-animation-delay=\"0\" data-animation-duration=\"1\">\n\t\t\tS\u00e5ningsprocessen (kl\u00e6kkeri)\t<\/h4>\n\t<p>Cultivation of seaweed relies on supply of thin lines with very small seaweed plants that are attached to the line and will eventually grow into long blades. You might be able to buy ready-made spore lines from a hatchery &#8211; or you can choose to produce the spore lines yourself. We highly recommend that if you buy your spore lines, you make sure that the seaweed used to seed the lines comes from the area your farm is located in. Seaweed adapts to local conditions, and you are more likely to succeed if you base your farm on seaweed that has a proven track record for thriving in your area.\u00a0<\/p>\n<p>&nbsp;<\/p>\n<p>Hvis du v\u00e6lger at lave dem selv, skal du f\u00f8lge disse trin. Mens du arbejder foresl\u00e5r vi, at du tager noter undervejs, s\u00e5 du ved pr\u00e6cis hvad du har gjort og hvorn\u00e5r. S\u00e5 kan du bedre gribe tilbage i processen og forst\u00e5, hvad der kan v\u00e6re \u00e5rsagen, hvis noget g\u00e5r galt.<\/p>\n<p>&nbsp;<\/p>\n<p>Trin 1: Sporeindsamling<\/p>\n<ul>\n<li aria-level=\"1\">Collect mature sugar kelp blades in late summer (August-September). Look for sori patches-these dark spots contain spores.<\/li>\n<li aria-level=\"1\">Rinse with filtered seawater and store in a fridge (4-5\u202f\u00b0C) for 24-48 hours.<\/li>\n<\/ul>\n\t\t\t\t<img decoding=\"async\" src=\"https:\/\/coolbluefuture.org\/wp-content\/uploads\/2025\/07\/DSC01469-scaled.jpg\" alt=\"DSC01469\" itemprop=\"image\" height=\"1322\" width=\"2560\" title=\"DSC01469\" onerror=\"this.style.display='none'\" loading=\"lazy\" \/>\n\t<p>Trin 2: Sporefrigivelse &amp; podning<\/p>\n<ul>\n<li aria-level=\"1\">L\u00e6g sori-v\u00e6vet i havvandsbeholdere ved ca. 10\u202f\u00b0C med moderat luftning.<\/li>\n<li aria-level=\"1\">Tilf\u00f8j spoler med tynd line viklet rundt om. Sporerne s\u00e6tter sig fast p\u00e5 linerne.<\/li>\n<li aria-level=\"1\">Keep tanks illuminated (50-100 \u00b5mol\/m\u00b2\/s) for 10-14 days, changing water every 2-3 days.<\/li>\n<\/ul>\n<p>Trin 3: Opv\u00e6kst i kl\u00e6kkeri<\/p>\n<ul>\n<li aria-level=\"1\">Juvenile sporophytes (2-5 mm) should be visible on the twine within 2 weeks. Grow until they reach 1-2 cm, then prepare for deployment.<\/li>\n<\/ul>\n<h4  data-animation-delay=\"0\" data-animation-duration=\"1\">\n\t\t\tUdplantning i havet\t<\/h4>\n\t<p>Trin 1: V\u00e6lg den rigtige dag<\/p>\n<ul>\n<li aria-level=\"1\">Vent p\u00e5 roligt vejr og vand under 12\u202f\u00b0C.<\/li>\n<li aria-level=\"1\">Medbring spoler, langliner, strips, v\u00e6rkt\u00f8j og reservedele.<\/li>\n<\/ul>\n<p>Trin 2: Liner i vandet<\/p>\n<ul>\n<li aria-level=\"1\">Rul dine langliner ud mellem b\u00f8jerne.<\/li>\n<li aria-level=\"1\">Vikl forsigtigt podelinen i spiral omkring langlinerne. Fastg\u00f8r med strips eller knuder.<\/li>\n<\/ul>\n<p>Trin 3: Just\u00e9r dybde og sp\u00e6nding<\/p>\n<ul>\n<li aria-level=\"1\">Keep lines 1.5-3 m deep. Use drop lines or weights to stabilize.<\/li>\n<li aria-level=\"1\">Buoys should keep tension so lines don&#8217;t sag under kelp weight.<\/li>\n<\/ul>\n\t\t<meta itemprop=\"url\" content=\"https:\/\/coolbluefuture.org\/wp-content\/uploads\/2025\/08\/Untitled-video-Made-with-Clipchamp.mp4\" \/><div style=\"width: 640px;\" class=\"wp-video\"><video class=\"wp-video-shortcode\" id=\"video-758-1\" width=\"640\" height=\"360\" preload=\"metadata\" controls=\"controls\"><source type=\"video\/mp4\" src=\"https:\/\/coolbluefuture.org\/wp-content\/uploads\/2025\/08\/Untitled-video-Made-with-Clipchamp.mp4?_=1\" \/><source type=\"video\/mp4\" src=\"https:\/\/coolbluefuture.org\/wp-content\/uploads\/2025\/08\/Untitled-video-Made-with-Clipchamp.mp4?_=1\" \/><a href=\"https:\/\/coolbluefuture.org\/wp-content\/uploads\/2025\/08\/Untitled-video-Made-with-Clipchamp.mp4\">https:\/\/coolbluefuture.org\/wp-content\/uploads\/2025\/08\/Untitled-video-Made-with-Clipchamp.mp4<\/a><\/video><\/div>\t\n\t<p>Seeded twine is wrapped around a longline in Holb\u00e6k, Denmark for deployment at sea.<\/p>\n<h4  data-animation-delay=\"0\" data-animation-duration=\"1\">\n\t\t\tV\u00e6kst og vedligeholdelse\t<\/h4>\n\t<ul>\n<li aria-level=\"1\">Kelp can grow up to 1.5-3 cm\/day in winter conditions.<\/li>\n<li aria-level=\"1\">Visit your farm every 7-10 days. Clean debris and detangle lines.<\/li>\n<li aria-level=\"1\">Not\u00e9r vandtemperatur, saltholdighed og sigtbarhed ved hvert bes\u00f8g.<\/li>\n<\/ul>\n<h4  data-animation-delay=\"0\" data-animation-duration=\"1\">\n\t\t\tH\u00f8st af tang\t<\/h4>\n\t<ul>\n<li aria-level=\"1\">Harvest when blades reach 1-2 meters-typically March through May.<\/li>\n<li aria-level=\"1\">Sk\u00e6r over st\u00e6nglen, s\u00e5 planten kan vokse igen.<\/li>\n<li aria-level=\"1\">H\u00e5ndt\u00e9r forsigtigt for at undg\u00e5 skader. Skyl i havvand og afk\u00f8l hurtigt.<\/li>\n<li aria-level=\"1\">Yields of 10-20 kg of wet kelp per meter of longline are not uncommon in healthy conditions with high salinity and abundant nutrition.<\/li>\n<\/ul>\n<h3  data-animation-delay=\"0\" data-animation-duration=\"1\">\n\t\t\tMuslingedyrkning: Udstyr, ops\u00e6tning og teknik\t<\/h3>\n\t<p>Mussels are one of the easiest shellfish to grow and require minimal inputs. Once you&#8217;ve set your system, they&#8217;ll grow using natural phytoplankton-cleaning the water as they go.<\/p>\n<p>&nbsp;<\/p>\n<p>Gear You&#8217;ll Use:<\/p>\n<ul>\n<li aria-level=\"1\">Mussel socks: Mesh tubes 1.5-2.5 meters long with varying mesh sizes.<\/li>\n<li aria-level=\"1\">B\u00e6ndel: Nylon- eller kokosreb til at fange vildt spat.<\/li>\n<li aria-level=\"1\">Buoys: 10-50 liters, keep socks vertical and lines from tangling.<\/li>\n<li aria-level=\"1\">Anchors: 20-50 kg depending on current strength.<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<p>Spatindsamling<\/p>\n<ul>\n<li aria-level=\"1\">H\u00e6ng muslingeb\u00e6ndel ud i for\u00e5ret.<\/li>\n<li aria-level=\"1\">After 4-6 weeks, spat (2-4 mm) will settle. Collect and gently transfer to socks.<\/li>\n<\/ul>\n\t<p>V\u00e6kstfase<\/p>\n<ul>\n<li aria-level=\"1\">Fyld str\u00f8mper med spat og h\u00e6ng dem p\u00e5 langlinerne i din havmark.<\/li>\n<li aria-level=\"1\">Maintain 30-50 cm spacing between socks for good flow.<\/li>\n<\/ul>\n\t\t\t\t<img decoding=\"async\" src=\"https:\/\/coolbluefuture.org\/wp-content\/uploads\/2025\/07\/DSC08548-scaled-e1752937808516.jpg\" alt=\"DSC08548\" itemprop=\"image\" title=\"DSC08548\" onerror=\"this.style.display='none'\" loading=\"lazy\" \/>\n\t<p>Vedligehold<\/p>\n<ul>\n<li aria-level=\"1\">Clean socks every 2-4 weeks to prevent biofouling.<\/li>\n<li aria-level=\"1\">Hold \u00f8je med s\u00f8stjerner, \u00e6nder og krabber.<\/li>\n<li aria-level=\"1\">Udskift slidte str\u00f8mper og just\u00e9r opdrift hver m\u00e5ned.<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<p>H\u00f8st<\/p>\n<ul>\n<li aria-level=\"1\">Mussels reach harvest size (4-6 cm) in 12-18 months-though this depends heavily on local growing conditions. In areas with high salinity and plenty of nutrients, growth is fast, while in low-salinity waters, mussels may never grow very large.<\/li>\n<li aria-level=\"1\">H\u00f8st ved at klippe str\u00f8mperne af linen, skylle og k\u00f8le under 5\u202f\u00b0C. Muslingerne kan evt. st\u00f8rrelsessorteres ved h\u00f8st, og de mindste muslinger h\u00e6nges tilbage i havmarken.<\/li>\n<li aria-level=\"1\">Expect 8-15 kg of mussels per sock depending on conditions.<\/li>\n<\/ul>\n<h3>\n\t\t\t\u00d8stersdyrkning: Udstyr, ops\u00e6tning og teknik\t<\/h3>\n\t<p>\u00d8sters er en v\u00e6rdifuld afgr\u00f8de, der vokser i flydende eller h\u00e6ngende systemer. De kr\u00e6ver mere sortering end muslinger, men har h\u00f8jt udbytte.<\/p>\n<p>&nbsp;<\/p>\n<p>Gear You&#8217;ll Use:<\/p>\n<ul>\n<li aria-level=\"1\">Flydebure eller -poser: UV-stabilt net til overfladedyrkning.<\/li>\n<li aria-level=\"1\">Bundbure: St\u00e5l eller plast til undervandsbrug.<\/li>\n<li aria-level=\"1\">Grading sieves: For size-sorting every 4-6 weeks.<\/li>\n<li aria-level=\"1\">Rovdyrsnet: Beskytter mod krabber og snegle.<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<p>Kl\u00e6kkeri- og spatfasen<\/p>\n<ul>\n<li aria-level=\"1\">Buy 2-10 mm seed from a certified hatchery.<\/li>\n<li aria-level=\"1\">Start i en \u201dupweller\u201d eller fine netposer.<\/li>\n<li aria-level=\"1\">Keep in a calm, nutrient-rich location for 4-6 weeks.<\/li>\n<\/ul>\n\t\t\t\t<img decoding=\"async\" src=\"https:\/\/coolbluefuture.org\/wp-content\/uploads\/2025\/08\/IMG_5094-rotated-e1755244315890.jpeg\" alt=\"Oyster spat from an upweller.\" itemprop=\"image\" height=\"1360\" width=\"2128\" title=\"IMG_5094\" onerror=\"this.style.display='none'\" loading=\"lazy\" \/>\n\t\tOyster spat from an upweller.\n\t<p>V\u00e6kstfase<\/p>\n<ul>\n<li aria-level=\"1\">Move oysters to grow-out bags once they reach 10-15 mm.<\/li>\n<li aria-level=\"1\">Space bags 30-50 cm apart on floating lines or pontoons.<\/li>\n<li aria-level=\"1\">Flip or tumble bags every 1-2 weeks to shape shells and reduce fouling.<\/li>\n<\/ul>\n\t\t\t\t<img decoding=\"async\" src=\"https:\/\/coolbluefuture.org\/wp-content\/uploads\/2025\/08\/IMG_8566-scaled-e1755244480464.jpg\" alt=\"Oyster bags floating in a near shore environment.\" itemprop=\"image\" height=\"910\" width=\"1212\" title=\"IMG_8566\" onerror=\"this.style.display='none'\" loading=\"lazy\" \/>\n\t\tOyster bags floating in a near shore environment.\n\t<p>Vedligeholdelse<\/p>\n<ul>\n<li aria-level=\"1\">Reng\u00f8r ugentligt med b\u00f8rste eller vand.<\/li>\n<li aria-level=\"1\">Grade oysters every month using a 2-5 mm mesh series.<\/li>\n<li aria-level=\"1\">Fjern rovdyr og just\u00e9r afstand for optimal v\u00e6kst.<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<p>H\u00f8st<\/p>\n<ul>\n<li aria-level=\"1\">Oysters reach 75-100 mm in 18-24 months-depending on salinity and available nutrients where they are grown.<\/li>\n<li aria-level=\"1\">Skyl, sort\u00e9r og k\u00f8l til under 5\u202f\u00b0C.<\/li>\n<li aria-level=\"1\">You can expect 25-50 market-size oysters per oyster bag or cage.<\/li>\n<\/ul>\n\t<a href=\"https:\/\/coolbluefuture.org\/da\/guide-to-regenerative-ocean-farming\/lesson-3\/\" target=\"_self\" role=\"button\" aria-label=\"Forrige Lektion\">\n\t\t\t\t\t\tForrige Lektion\n\t\t\t\t\t<\/a>\n\t<a href=\"https:\/\/coolbluefuture.org\/da\/guide-to-regenerative-ocean-farming\/lesson-5\/\" target=\"_self\" role=\"button\" aria-label=\"N\u00e6ste Lektion\">\n\t\t\t\t\t\tN\u00e6ste Lektion\n\t\t\t<\/a>","protected":false},"excerpt":{"rendered":"<p>Lesson 4 Lesson 4: Introduction to Crops and Cultivation Lessons are currently available in English, Danish &#038; Lithuanian Introduction In this lesson, you&#8217;ll get an in-depth look at the crops you&#8217;ll grow-seaweed and bivalves-and how to manage them through the seasonal cycle of your farm. You&#8217;ll not only learn what to grow, but how to&hellip;<\/p>","protected":false},"author":9,"featured_media":0,"parent":43,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"footnotes":""},"class_list":["post-758","page","type-page","status-publish","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Lesson 4 - Cool Blue Future<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/coolbluefuture.org\/da\/guide-to-regenerative-ocean-farming\/lesson-4\/\" \/>\n<meta property=\"og:locale\" content=\"da_DK\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Lesson 4 - Cool Blue Future\" \/>\n<meta property=\"og:description\" content=\"Lesson 4 Lesson 4: Introduction to Crops and Cultivation Lessons are currently available in English, Danish &#038; Lithuanian Introduction In this lesson, you&#8217;ll get an in-depth look at the crops you&#8217;ll grow-seaweed and bivalves-and how to manage them through the seasonal cycle of your farm. 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