{"id":1181,"date":"2015-04-08T11:05:19","date_gmt":"2015-04-08T11:05:19","guid":{"rendered":"http:\/\/fly-fish-guide.net\/blog\/?p=1181"},"modified":"2015-04-08T11:09:18","modified_gmt":"2015-04-08T11:09:18","slug":"more-salmon-statistics","status":"publish","type":"post","link":"http:\/\/fly-fish-guide.net\/blog\/more-salmon-statistics\/","title":{"rendered":"More Salmon Statistics"},"content":{"rendered":"<p>In my last post, using Jim McLaughlin&#8217;s data taken from the Wye over the last three years, we showed, conclusively in my opinion, that there is a correlation between the height of water and the chance of catching a salmon.<br \/>\nUsing the same data we can plot the number of fish caught on rising and falling water levels.<\/p>\n<p><a href=\"http:\/\/fly-fish-guide.net\/blog\/wp-content\/uploads\/Rising-Falling-River-Catches.png\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-1182 size-full\" src=\"http:\/\/fly-fish-guide.net\/blog\/wp-content\/uploads\/Rising-Falling-River-Catches.png\" alt=\"Rising Falling River Catches\" width=\"500\" height=\"305\" srcset=\"http:\/\/fly-fish-guide.net\/blog\/wp-content\/uploads\/Rising-Falling-River-Catches.png 500w, http:\/\/fly-fish-guide.net\/blog\/wp-content\/uploads\/Rising-Falling-River-Catches-200x122.png 200w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/a>The graphs show the river level (blue) taken from the EA gauge at Redbrook on the Wye, every 15 minutes. The green bars indicate the number of salmon caught on falling water and the red bars indicate those caught on rising water. It is apparent that more fish were caught when there was a falling water level.<br \/>\nWhat we can also observe is that most of the fish were caught when the gauge was between 0.4 and 1.0 metres.<br \/>\nYou will see in the same chart that the moon phases are marked in light blue and shown as vertical lines, representing the beginning of each moon phase.<br \/>\nThe results for the moon phases are summarised in the following diagram&#8230;<\/p>\n<p><a href=\"http:\/\/fly-fish-guide.net\/blog\/wp-content\/uploads\/Catches-by-moon.png\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-1183\" src=\"http:\/\/fly-fish-guide.net\/blog\/wp-content\/uploads\/Catches-by-moon.png\" alt=\"Catches by moon\" width=\"500\" height=\"305\" srcset=\"http:\/\/fly-fish-guide.net\/blog\/wp-content\/uploads\/Catches-by-moon.png 500w, http:\/\/fly-fish-guide.net\/blog\/wp-content\/uploads\/Catches-by-moon-200x122.png 200w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/a>This appears to indicate that more fish were caught between when the moon was waxing and the full phase (days 18 to full moon +3).<br \/>\nTaking this one step further, we can make a comparison between the number of fish caught on &#8220;Good Days&#8221; and &#8220;Bad Days&#8221;. We define good days as those which fall in the in the waxing to full moon period and when the river height is between 0.4 and 1.0 metres.<\/p>\n<p><a href=\"http:\/\/fly-fish-guide.net\/blog\/wp-content\/uploads\/Good-Days-vs-Bad-Days.png\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-1185\" src=\"http:\/\/fly-fish-guide.net\/blog\/wp-content\/uploads\/Good-Days-vs-Bad-Days.png\" alt=\"Good Days vs Bad Days\" width=\"500\" height=\"422\" srcset=\"http:\/\/fly-fish-guide.net\/blog\/wp-content\/uploads\/Good-Days-vs-Bad-Days.png 500w, http:\/\/fly-fish-guide.net\/blog\/wp-content\/uploads\/Good-Days-vs-Bad-Days-178x150.png 178w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/a>What we can derive from the data is that there really are good days and bad days and if we take 2013 as an example a few more good days\u00a0made a significant difference to the salmon catch numbers, even though there were obviously more fish in the river in this year.<br \/>\nSo in conclusion, for our stretch of the Wye:-<\/p>\n<ul>\n<li>The range of the water height is critical<\/li>\n<li>There is a better chance of catching a salmon on a falling river height<\/li>\n<li>The moon phase appears to affect the taking behaviour of salmon and the &#8220;Goldilocks Period&#8221; (Jim&#8217;s phrase) is between\u00a0when the moon is waxing and three days after it is full.<\/li>\n<\/ul>\n<p>We can&#8217;t say if these are universal laws for all rivers because we don&#8217;t have any data but at least you can use them as a guide.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In my last post, using Jim McLaughlin&#8217;s data taken from the Wye over the last three years, we showed, conclusively in my opinion, that there is a correlation between the height of water and the chance of catching a salmon. Using the same data we can plot the number of fish caught on rising and [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[18],"tags":[],"class_list":["post-1181","post","type-post","status-publish","format-standard","hentry","category-techniques-that-catch-fish"],"_links":{"self":[{"href":"http:\/\/fly-fish-guide.net\/blog\/wp-json\/wp\/v2\/posts\/1181","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/fly-fish-guide.net\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/fly-fish-guide.net\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/fly-fish-guide.net\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/fly-fish-guide.net\/blog\/wp-json\/wp\/v2\/comments?post=1181"}],"version-history":[{"count":3,"href":"http:\/\/fly-fish-guide.net\/blog\/wp-json\/wp\/v2\/posts\/1181\/revisions"}],"predecessor-version":[{"id":1188,"href":"http:\/\/fly-fish-guide.net\/blog\/wp-json\/wp\/v2\/posts\/1181\/revisions\/1188"}],"wp:attachment":[{"href":"http:\/\/fly-fish-guide.net\/blog\/wp-json\/wp\/v2\/media?parent=1181"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/fly-fish-guide.net\/blog\/wp-json\/wp\/v2\/categories?post=1181"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/fly-fish-guide.net\/blog\/wp-json\/wp\/v2\/tags?post=1181"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}