{"id":131876,"date":"2024-11-30T20:00:58","date_gmt":"2024-11-30T13:00:58","guid":{"rendered":"https:\/\/hotvideos24.online\/?p=131876"},"modified":"2024-11-30T20:00:58","modified_gmt":"2024-11-30T13:00:58","slug":"expired-cans-of-salmon-from-decades-ago-reveal-a-huge-surprise-sciencealert","status":"publish","type":"post","link":"https:\/\/hotvideos24.online\/?p=131876","title":{"rendered":"Expired Cans of Salmon From Decades Ago Reveal a Huge Surprise : ScienceAlert"},"content":{"rendered":"<p> <script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js?client=ca-pub-3711241968723425\"\r\n     crossorigin=\"anonymous\"><\/script>\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:block\"\r\n     data-ad-format=\"fluid\"\r\n     data-ad-layout-key=\"-fb+5w+4e-db+86\"\r\n     data-ad-client=\"ca-pub-3711241968723425\"\r\n     data-ad-slot=\"7910942971\"><\/ins>\r\n<script>\r\n     (adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script><br \/>\n<\/p>\n<div>\n<p>Canned salmon are the unlikely heroes of an accidental back-of-the-pantry natural history museum, with decades of Alaskan marine ecology preserved in brine and tin.<\/p>\n<p>Parasites can <a href=\"https:\/\/www.sciencealert.com\/parasites-are-actually-vital-for-some-species-survival-study-shows\">tell us a lot<\/a> about an ecosystem, because they&#8217;re usually <a href=\"https:\/\/www.sciencealert.com\/scientists-want-you-to-stop-hating-on-parasites-and-they-ve-got-a-12-step-plan-to-help\">up in the business of several species<\/a>. But unless they cause some major problem to humans, historically we <a href=\"https:\/\/www.sciencealert.com\/what-we-don-t-know-about-parasites-could-be-disastrous-for-both-us-and-them\">haven&#8217;t paid them much attention<\/a>.<\/p>\n<p><!-- START single\/mrec --><br \/>\n<!-- END single\/mrec --><\/p>\n<p>That&#8217;s a problem for parasite ecologists, like Natalie Mastick and Chelsea Wood from the University of Washington, who had been searching for a way to retroactively track the effects parasites had on Pacific Northwestern marine mammals.<\/p>\n<p><!-- START single\/mrec --><br \/>\n<!-- END single\/mrec --><\/p>\n<p>So when Wood got a call from Seattle&#8217;s Seafood Products Association, asking if she&#8217;d be interested in taking boxes of dusty old expired cans of salmon \u2013 dating back to the 1970s \u2013 off their hands, her answer was, unequivocally, yes.<\/p>\n<p><!-- START single\/mrec --><br \/>\n<!-- END single\/mrec --><\/p>\n<p>The cans had been set aside for decades as part of the association&#8217;s quality control process, but i<a href=\"https:\/\/www.youtube.com\/watch?v=xIYz3FOsYTU\">n the hands of the ecologists<\/a>, they became an archive of excellently preserved specimens; not of salmon, but of worms.<\/p>\n<p><iframe loading=\"lazy\" title=\"Decades Old Cans of Salmon Reveal a Surprise\" width=\"1170\" height=\"658\" src=\"https:\/\/www.youtube.com\/embed\/xIYz3FOsYTU?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe> frameborder=&#8221;0\u2033 allow=&#8221;accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share&#8221; referrerpolicy=&#8221;strict-origin-when-cross-origin&#8221; allowfullscreen&gt;<\/iframe><\/p>\n<p>While the idea of worms in your canned fish is a bit stomach-turning, these roughly 0.4-inch (1-centimeter) long marine parasites, <a href=\"https:\/\/en.wikipedia.org\/wiki\/Anisakidae\">anisakids<\/a>, are harmless to humans when killed during the canning process.<\/p>\n<p><!-- START single\/mrec --><br \/>\n<!-- END single\/mrec --><\/p>\n<p>&#8220;Everyone assumes that worms in your salmon is a sign that things have gone awry,&#8221; <a href=\"https:\/\/www.washington.edu\/news\/2024\/04\/04\/canned-salmon\/\">said<\/a> Wood when the research was published this year.<\/p>\n<p><!-- START single\/mrec --><br \/>\n<!-- END single\/mrec --><\/p>\n<p>&#8220;But the anisakid life cycle integrates many components of the food web. I see their presence as a signal that the fish on your plate came from a healthy ecosystem.&#8221;<\/p>\n<figure id=\"attachment_123845\" aria-describedby=\"caption-attachment-123845\" style=\"width: 642px\" class=\"wp-caption alignnone\"><img decoding=\"async\" src=\"https:\/\/www.sciencealert.com\/images\/2024\/04\/NematodeInSalmon_Body.jpg\" alt=\"A red circle around tweezers grabbing a piece of cooked salmon\" width=\"642\" height=\"500\" class=\"size-full wp-image-123845\" srcset=\"https:\/\/www.sciencealert.com\/images\/2024\/04\/NematodeInSalmon_Body.jpg 642w, https:\/\/www.sciencealert.com\/images\/2024\/04\/NematodeInSalmon_Body-533x415.jpg 533w, https:\/\/www.sciencealert.com\/images\/2024\/04\/NematodeInSalmon_Body-600x467.jpg 600w\" sizes=\"auto, (max-width: 642px) 100vw, 642px\" loading=\"lazy\"\/><figcaption id=\"caption-attachment-123845\" class=\"wp-caption-text\">An anisakid worm (circled in red) in a canned salmon fillet. (Natalie Mastick\/University of Washington)<\/figcaption><\/figure>\n<p>Anisakids enter the food web when they are eaten by <a href=\"https:\/\/en.wikipedia.org\/wiki\/Krill\">krill<\/a>, which in turn are eaten by larger species.<\/p>\n<p><!-- START single\/mrec --><br \/>\n<!-- END single\/mrec --><\/p>\n<p>This is how anisakids end up in the salmon, and eventually, the intestines of marine mammals, where the worms complete their life cycle by reproducing. Their eggs are excreted into the ocean by the mammal, and the cycle begins again.<\/p>\n<p><!-- START single\/mrec --><br \/>\n<!-- END single\/mrec --><\/p>\n<p>&#8220;If a host is not present \u2013 marine mammals, for example \u2013 anisakids can&#8217;t complete their life cycle and their numbers will drop,&#8221; <a href=\"https:\/\/www.washington.edu\/news\/2024\/04\/04\/canned-salmon\/\">said<\/a><a href=\"https:\/\/www.washington.edu\/news\/2024\/04\/04\/canned-salmon\/\"\/> Wood, the paper&#8217;s senior author.<\/p>\n<p><!-- START single\/mrec --><br \/>\n<!-- END single\/mrec --><\/p>\n<p>The 178 tin cans in the &#8216;archive&#8217; contained four different salmon species caught in the Gulf of Alaska and Bristol Bay across a 42-year period (1979\u20132021), including 42 cans of chum <em>(<a href=\"https:\/\/en.wikipedia.org\/wiki\/Chum_salmon\">Oncorhynchus keta<\/a><\/em>), 22 coho (<a href=\"https:\/\/en.wikipedia.org\/wiki\/Coho_salmon\"><em>Oncorhynchus<\/em> <em>kisutch<\/em><\/a>), 62 pink (<a href=\"https:\/\/en.wikipedia.org\/wiki\/Pink_salmon\"><em>Oncorhynchus<\/em> <em>gorbuscha<\/em><\/a>), and 52 sockeye <em>(<a href=\"https:\/\/en.wikipedia.org\/wiki\/Sockeye_salmon\">Oncorhynchus nerka<\/a>).<\/em><\/p>\n<p><!-- START single\/mrec --><br \/>\n<!-- END single\/mrec --><\/p>\n<p>Although the techniques used to preserve the salmon do not, thankfully, keep the worms in pristine condition, the researchers were able to dissect the filets and calculate the number of worms per gram of salmon.<\/p>\n<figure id=\"attachment_123844\" aria-describedby=\"caption-attachment-123844\" style=\"width: 642px\" class=\"wp-caption alignnone\"><img decoding=\"async\" src=\"https:\/\/www.sciencealert.com\/images\/2024\/04\/DegradedNematodeInSalmon_Body.jpg\" alt=\"A brownish worm magnified on a white background\" width=\"642\" height=\"500\" class=\"size-full wp-image-123844\" srcset=\"https:\/\/www.sciencealert.com\/images\/2024\/04\/DegradedNematodeInSalmon_Body.jpg 642w, https:\/\/www.sciencealert.com\/images\/2024\/04\/DegradedNematodeInSalmon_Body-533x415.jpg 533w, https:\/\/www.sciencealert.com\/images\/2024\/04\/DegradedNematodeInSalmon_Body-600x467.jpg 600w\" sizes=\"auto, (max-width: 642px) 100vw, 642px\" loading=\"lazy\"\/><figcaption id=\"caption-attachment-123844\" class=\"wp-caption-text\">A highly degraded anisakid found in canned salmon. (<a href=\"https:\/\/www.washington.edu\/news\/2024\/04\/04\/canned-salmon\/\">Natalie Mastick\/University of Washington<\/a>)<\/figcaption><\/figure>\n<p>They found worms had increased over time in chum and pink salmon, but not in sockeye or coho.<\/p>\n<p><!-- START single\/mrec --><br \/>\n<!-- END single\/mrec --><\/p>\n<p>&#8220;Seeing their numbers rise over time, as we did with pink and chum salmon, indicates that these parasites were able to find all the right hosts and reproduce,&#8221; <a href=\"https:\/\/www.washington.edu\/news\/2024\/04\/04\/canned-salmon\/\">said<\/a> Mastick, the paper&#8217;s lead author.<\/p>\n<p><!-- START single\/mrec --><br \/>\n<!-- END single\/mrec --><\/p>\n<p>&#8220;That could indicate a stable or recovering ecosystem, with enough of the right hosts for anisakids.&#8221;<\/p>\n<figure id=\"attachment_145288\" aria-describedby=\"caption-attachment-145288\" style=\"width: 642px\" class=\"wp-caption aligncenter\"><img decoding=\"async\" src=\"https:\/\/www.sciencealert.com\/images\/2024\/11\/ece311043-fig-0001-m-642x352.jpg\" alt=\"Graph showing number of cans from each year that contained each species\" width=\"642\" height=\"352\" class=\"size-medium wp-image-145288\" srcset=\"https:\/\/www.sciencealert.com\/images\/2024\/11\/ece311043-fig-0001-m-642x352.jpg 642w, https:\/\/www.sciencealert.com\/images\/2024\/11\/ece311043-fig-0001-m-756x415.jpg 756w, https:\/\/www.sciencealert.com\/images\/2024\/11\/ece311043-fig-0001-m-768x422.jpg 768w, https:\/\/www.sciencealert.com\/images\/2024\/11\/ece311043-fig-0001-m-1536x843.jpg 1536w, https:\/\/www.sciencealert.com\/images\/2024\/11\/ece311043-fig-0001-m-2048x1124.jpg 2048w, https:\/\/www.sciencealert.com\/images\/2024\/11\/ece311043-fig-0001-m-600x329.jpg 600w\" sizes=\"auto, (max-width: 642px) 100vw, 642px\" loading=\"lazy\"\/><figcaption id=\"caption-attachment-145288\" class=\"wp-caption-text\">The distribution of canned salmon samples available for each salmon species in each decade. (Mastick et al., <em>Ecology and Evolution<\/em>, 2024)<\/figcaption><\/figure>\n<p>But it&#8217;s harder to explain the stable levels of worms in coho and sockeye, especially since the canning process made it difficult to identify the specific species of anisakid.<\/p>\n<p><!-- START single\/mrec --><br \/>\n<!-- END single\/mrec --><\/p>\n<p>&#8220;Though we are confident in our identification to the family level, we could not identify the [anisakids] we detected at the species level,&#8221; the authors <a href=\"https:\/\/onlinelibrary.wiley.com\/doi\/10.1002\/ece3.11043\">write<\/a>,<\/p>\n<p><!-- START single\/mrec --><br \/>\n<!-- END single\/mrec --><\/p>\n<p>&#8220;So it is possible that parasites of an increasing species tend to infect pink and chum salmon, while parasites of a stable species tend to infect coho and sockeye.&#8221;<\/p>\n<p><!-- START single\/mrec --><br \/>\n<!-- END single\/mrec --><\/p>\n<p>Mastick and colleagues think this novel approach \u2013 dusty old cans turned ecological archive \u2013 could fuel many more scientific discoveries. It seems they&#8217;ve opened quite a can of worms.<\/p>\n<p><!-- START single\/mrec --><br \/>\n<!-- END single\/mrec --><\/p>\n<p>This research was published in <em><a href=\"https:\/\/onlinelibrary.wiley.com\/doi\/10.1002\/ece3.11043\">Ecology and Evolution.<\/a><\/em><\/p>\n<p><em>An earlier version of this article was published in April 2024<\/em>.<\/p>\n<\/p><\/div>\n<p><script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js?client=ca-pub-3711241968723425\"\r\n     crossorigin=\"anonymous\"><\/script>\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:block\"\r\n     data-ad-format=\"fluid\"\r\n     data-ad-layout-key=\"-fb+5w+4e-db+86\"\r\n     data-ad-client=\"ca-pub-3711241968723425\"\r\n     data-ad-slot=\"7910942971\"><\/ins>\r\n<script>\r\n     (adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script><br \/>\n<br \/><div data-type=\"_mgwidget\" data-widget-id=\"1660802\">\r\n<\/div>\r\n<script>(function(w,q){w[q]=w[q]||[];w[q].push([\"_mgc.load\"])})(window,\"_mgq\");\r\n<\/script>\r\n<br \/>\n<br \/><a href=\"https:\/\/www.sciencealert.com\/expired-cans-of-salmon-from-decades-ago-reveal-a-huge-surprise\">Source link <\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Canned salmon are the unlikely heroes of an accidental back-of-the-pantry natural history museum, with decades of Alaskan marine ecology preserved in brine and tin. Parasites can tell us a lot &hellip; <a href=\"https:\/\/hotvideos24.online\/?p=131876\" class=\"more-link\">Read More<\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8628],"tags":[],"class_list":["post-131876","post","type-post","status-publish","format-standard","hentry","category-science","entry"],"_links":{"self":[{"href":"https:\/\/hotvideos24.online\/index.php?rest_route=\/wp\/v2\/posts\/131876","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/hotvideos24.online\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/hotvideos24.online\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/hotvideos24.online\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/hotvideos24.online\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=131876"}],"version-history":[{"count":0,"href":"https:\/\/hotvideos24.online\/index.php?rest_route=\/wp\/v2\/posts\/131876\/revisions"}],"wp:attachment":[{"href":"https:\/\/hotvideos24.online\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=131876"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/hotvideos24.online\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=131876"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/hotvideos24.online\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=131876"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}