{"id":644,"date":"2007-10-25T14:36:00","date_gmt":"2007-10-25T13:36:00","guid":{"rendered":"http:\/\/admin.patheos.com\/blogs\/epiphenom\/2007\/10\/st-bernard-dogs-a-case-study-of-how-selection-powers-evolution.html"},"modified":"2014-11-14T05:59:01","modified_gmt":"2014-11-14T04:59:01","slug":"st-bernard-dogs-show-power-of-natural","status":"publish","type":"post","link":"https:\/\/www.patheos.com\/blogs\/epiphenom\/2007\/10\/st-bernard-dogs-show-power-of-natural.html","title":{"rendered":"St Bernard dogs: a case study of how selection powers evolution"},"content":{"rendered":"<!DOCTYPE html PUBLIC \"-\/\/W3C\/\/DTD HTML 4.0 Transitional\/\/EN\" \"http:\/\/www.w3.org\/TR\/REC-html40\/loose.dtd\">\n<html><head><meta http-equiv=\"content-type\" content=\"text\/html; charset=utf-8\"><meta http-equiv=\"content-type\" content=\"text\/html; charset=utf-8\"><\/head><body><div style=\"padding: 5px;float: left\"><a href=\"http:\/\/bpr3.org\/?p=52\" class=\" decorated-link\" target=\"_blank\" rel=\"nofollow\"><img loading=\"lazy\" decoding=\"async\" alt=\"Blogging on Peer-Reviewed Research\" src=\"https:\/\/bpr3.org\/images\/rbicons\/ResearchBlogging-Medium-White.png\" height=\"50\" width=\"80\"><\/a><\/div>\n<p>In a study published yesterday, researchers from Manchester and Edinburgh universities have shown the power of selection (in this case natural selection by dog breeders) to rapidly change body shape. They looked at skulls from 47 St Bernard dogs dating back over 120 years \u2013 international breed standards for these dogs were established in the late 19th century. Since then skull shape has changed in a dramatic, and linear, fashion, to become closer to the \u2018ideal\u2019: their skulls are broader, the angle between the nose and the forehead has become steeper, and they\u2019ve developed a more pronounced ridge above the eyes.<\/p>\n<blockquote><p>\u201cWe discovered that features stipulated in the breed standard of the St Bernard became more exaggerated over time as breeders selected dogs that had the desired physical attributes,\u201d said Dr Klingenberg.<\/p>\n<p>\u201cIn effect they have applied selection to move the evolutionary process a considerable way forward, providing a unique opportunity to observe sustained evolutionary change under known selective pressures.\u201d<\/p><\/blockquote>\n<p>Ref: Drake AG, Klingenberg CP. The pace of morphological change: historical transformation of skull shape in St Bernard dogs. <a href=\"http:\/\/www.journals.royalsoc.ac.uk\/content\/r260086753041271\/\" class=\" decorated-link\" target=\"_blank\" rel=\"nofollow\">Proc Royal Soc B 2007; DOI 10.1098\/rspb.2007.1169<\/a> (subscription required)<\/p>\n<\/body><\/html>\n","protected":false},"excerpt":{"rendered":"<p>In a study published yesterday, researchers from Manchester and Edinburgh universities have shown the power of selection (in this case natural selection by dog breeders) to rapidly change body shape. They looked at skulls from 47 St Bernard dogs dating back over 120 years \u2013 international breed standards for these dogs were established in the [&hellip;]<\/p>\n","protected":false},"author":2091,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-644","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>St Bernard dogs: a case study of how selection powers evolution<\/title>\n<meta name=\"description\" content=\"In a study published yesterday, researchers from Manchester and Edinburgh universities have shown the power of selection (in this case natural selection\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" 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