{"id":4247,"date":"2015-08-17T11:20:41","date_gmt":"2015-08-17T16:20:41","guid":{"rendered":"http:\/\/sciencemediacentre.ca\/site\/?p=4247"},"modified":"2015-08-17T11:20:41","modified_gmt":"2015-08-17T16:20:41","slug":"wild-salmon-reproduce-better-than-hatchery-ones","status":"publish","type":"post","link":"http:\/\/sciencemediacentre.ca\/site\/wild-salmon-reproduce-better-than-hatchery-ones\/","title":{"rendered":"Wild salmon reproduce better than hatchery ones<img src=\"http:\/\/sciencemediacentre.ca\/site\/wp-content\/uploads\/2014\/01\/canada_flag_icon_small.gif\">"},"content":{"rendered":"<div id=\"attachment_4249\" style=\"width: 310px\" class=\"wp-caption aligncenter\"><a href=\"http:\/\/sciencemediacentre.ca\/site\/wp-content\/uploads\/2015\/08\/16150184519_eb06135ce7_z.jpg\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-4249\" class=\"wp-image-4249 size-medium\" src=\"http:\/\/sciencemediacentre.ca\/site\/wp-content\/uploads\/2015\/08\/16150184519_eb06135ce7_z-300x168.jpg\" alt=\"Wild male Coho salmon (picture above) reproduce better than males released from hatcheries. (Image credit: Bureau of Land Management Oregon and Washington)\" width=\"300\" height=\"168\" srcset=\"http:\/\/sciencemediacentre.ca\/site\/wp-content\/uploads\/2015\/08\/16150184519_eb06135ce7_z-300x168.jpg 300w, http:\/\/sciencemediacentre.ca\/site\/wp-content\/uploads\/2015\/08\/16150184519_eb06135ce7_z.jpg 640w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><p id=\"caption-attachment-4249\" class=\"wp-caption-text\">Wild male Coho salmon (picture above) reproduce better than males released from hatcheries. (Image credit: <a href=\"https:\/\/www.flickr.com\/photos\/blmoregon\/16150184519\">Bureau of Land Management Oregon and Washington<\/a>)<\/p><\/div>\n<p><span style=\"font-weight: 400;\">Hatchery salmons are often introduced into rivers to support wild populations, which are in a state of decline. Yet hatchery males have lower reproductive success than wild ones, according to a study of 196 Coho salmons (<\/span><i><span style=\"font-weight: 400;\">Oncorhynchus kisutch<\/span><\/i><span style=\"font-weight: 400;\">). <\/span><\/p>\n<p><span style=\"font-weight: 400;\">When occupying the same position in the spawning hierarchy, hatchery males have only 55 to 84 per cent the paternity of wild males.\u00a0<\/span>The authors believe \u201cdifferences in breeding success between wild and hatchery fish could have important management consequences\u201d as hatchery fish will have lower fitness than wild fish in mixed populations.<\/p>\n<p>The researchers\u00a0believe this could partly explain why previous studies have failed to show an improvement of fish stocks when wild populations are supplemented with hatchery salmon.<\/p>\n<p><a href=\"http:\/\/rsos.royalsocietypublishing.org\/content\/2\/8\/150161\" target=\"_blank\"><span style=\"text-decoration: underline;\">Original research paper<\/span><\/a>\u00a0published in\u00a0<em>Royal Society Open Science\u00a0<\/em>on\u00a0<strong>August 11<\/strong><span class=\"aBn\" tabindex=\"0\" data-term=\"goog_453723367\"><span class=\"aQJ\"><strong>, 2015<\/strong>.<\/span><\/span><\/p>\n<p><span style=\"text-decoration: underline;\"><em><strong>Names and affiliations of selected\u00a0author<\/strong><\/em><\/span><\/p>\n<h4><strong><span style=\"font-weight: 400;\">Dr Shawn Garner, Department of Biology, University of Western Ontario, London, Ontario<\/span><\/strong><\/h4>\n","protected":false},"excerpt":{"rendered":"<p>Hatchery salmons are often introduced into rivers to support wild populations, which are in a state of decline. Yet hatchery males have lower reproductive success than wild ones, according to a study of 196 Coho salmons (Oncorhynchus kisutch). When occupying the same position in the spawning hierarchy, hatchery males have only 55 to 84 per [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":4249,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[1327],"tags":[2361,170,215,1778,50],"class_list":["post-4247","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-article-scientifique","tag-aquaculture","tag-biodiversity","tag-environment","tag-fish","tag-ontario"],"jetpack_featured_media_url":"http:\/\/sciencemediacentre.ca\/site\/wp-content\/uploads\/2015\/08\/16150184519_eb06135ce7_z.jpg","jetpack_shortlink":"https:\/\/wp.me\/p4DqbN-16v","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"http:\/\/sciencemediacentre.ca\/site\/wp-json\/wp\/v2\/posts\/4247","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/sciencemediacentre.ca\/site\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/sciencemediacentre.ca\/site\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/sciencemediacentre.ca\/site\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"http:\/\/sciencemediacentre.ca\/site\/wp-json\/wp\/v2\/comments?post=4247"}],"version-history":[{"count":1,"href":"http:\/\/sciencemediacentre.ca\/site\/wp-json\/wp\/v2\/posts\/4247\/revisions"}],"predecessor-version":[{"id":4250,"href":"http:\/\/sciencemediacentre.ca\/site\/wp-json\/wp\/v2\/posts\/4247\/revisions\/4250"}],"wp:featuredmedia":[{"embeddable":true,"href":"http:\/\/sciencemediacentre.ca\/site\/wp-json\/wp\/v2\/media\/4249"}],"wp:attachment":[{"href":"http:\/\/sciencemediacentre.ca\/site\/wp-json\/wp\/v2\/media?parent=4247"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/sciencemediacentre.ca\/site\/wp-json\/wp\/v2\/categories?post=4247"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/sciencemediacentre.ca\/site\/wp-json\/wp\/v2\/tags?post=4247"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}