{"id":2857,"date":"2011-09-11T18:44:12","date_gmt":"2011-09-12T01:44:12","guid":{"rendered":"http:\/\/blog.kootenay-lake.ca\/?p=2857"},"modified":"2013-04-15T07:52:05","modified_gmt":"2013-04-15T14:52:05","slug":"kokanee-whimsey","status":"publish","type":"post","link":"https:\/\/blog.kootenay-lake.ca\/?p=2857","title":{"rendered":"Kokanee whimsey"},"content":{"rendered":"
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Click on this image for underwater views of Kokanee<\/p><\/div>\n

It is September and locals arrive by the dozens\u2014even hundreds. That is because the Kokanee arrive by the thousands\u2014even tens of thousands. The streams and channels turn red with spawning fish. No September visit to this area is complete without a jaunt to admire our landlocked salmon.<\/p>\n

Other years, I concentrated on taking underwater pictures of the Kokanee, such as the picture to the right, which is linked to those images and a discussion. This year I concentrated on pictures of Kokanee aerodynamics (chuckle).<\/p>\n

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If you wonder about the density of spawning Kokanee in local streams, consider this view.
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To ascend a channel, a Kokanee often has to work its way past a weir. Sometimes it just pushes up through the descending water. Sometimes it jumps; that is, it launches itself into the air on a ballistic path that should take it above the weir. This picture shows four Kokanee taking to the air in an effort to climb above a weir. The red splotches in the lower left are Kokanee above the weir swimming vigorously to stay there.
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In the above picture, three of the four fish are oriented nicely. The fourth has started to roll. This next picture shows a good aerodynamic orientation for a ballistic fish.
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Alas it is not always so. As good as (any) fish is in controlling its orientation when in water, it is clear that a Kokanee (salmon) is rather bad at controlling it in the air. There are three rotations a balistic fish should control: pitch (nose up or down), yaw (swing to left or right), roll (turn on one\u2019s side). The next picture shows ballistic fish, one of which has lost control of yaw. It is travelling sideways.
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This picture shows a fish which has lost its control of pitch; its nose is down.
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And one where the loss of pitch control resulted in nose up.
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Here is a Kokanee with a rather marked problem in controlling yaw.
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But, my favourite fish is this one with a severe problem with controlling roll.
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Then there is a fish that despite its orientation will probably be dragged back below the weir because its tail is stuck in the water. There are other fish on the lower left that are struggling up through the water.
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 <\/p>\n","protected":false},"excerpt":{"rendered":"

It is September and locals arrive by the dozens\u2014even hundreds. That is because the Kokanee arrive by the thousands\u2014even tens of thousands. The streams and channels turn red with spawning fish. No September visit to this area is complete without … Continue reading →<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[19],"tags":[],"class_list":["post-2857","post","type-post","status-publish","format-standard","hentry","category-fish"],"_links":{"self":[{"href":"https:\/\/blog.kootenay-lake.ca\/index.php?rest_route=\/wp\/v2\/posts\/2857","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.kootenay-lake.ca\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.kootenay-lake.ca\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.kootenay-lake.ca\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.kootenay-lake.ca\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2857"}],"version-history":[{"count":41,"href":"https:\/\/blog.kootenay-lake.ca\/index.php?rest_route=\/wp\/v2\/posts\/2857\/revisions"}],"predecessor-version":[{"id":2904,"href":"https:\/\/blog.kootenay-lake.ca\/index.php?rest_route=\/wp\/v2\/posts\/2857\/revisions\/2904"}],"wp:attachment":[{"href":"https:\/\/blog.kootenay-lake.ca\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2857"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.kootenay-lake.ca\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2857"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.kootenay-lake.ca\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2857"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}