{"id":43044,"date":"2018-10-12T13:39:00","date_gmt":"2018-10-12T13:39:00","guid":{"rendered":"https:\/\/baleines.wpengine.com\/des-baleines-qui-filtrent-differemment\/"},"modified":"2019-07-12T19:10:57","modified_gmt":"2019-07-12T19:10:57","slug":"des-baleines-qui-filtrent-differemment","status":"publish","type":"post","link":"https:\/\/baleinesendirect.org\/en\/des-baleines-qui-filtrent-differemment\/","title":{"rendered":"Whales with different methods of filtering"},"content":{"rendered":"

Baleen refers to the stiff plates of keratin that hang off the upper jaw of some whales, more precisely mysticetes\u2026 but is all baleen alike? Of course not! The size and shape of baleen and how it is used varies widely from one group of whales to another, reveals a study published in the Biological Journal of the Linnean Society<\/em>.<\/p>\n

Baleen acts as a filter, allowing mysticetes<\/a> to keep their prey in their mouths and expel the sea water. However, mysticetes do not all filter the same way.<\/p>\n

In this study, researchers analyzed the functional morphology and hydrodynamics of baleen in ten species of whales. The results demonstrate a clear difference between the baleen of balaenids (members of the family Balaenidae, which includes right whales<\/a> and the bowhead whale) and that of rorquals. The baleen of balaenids is longer, thinner, straighter, and four to five times the size of that of similar-sized rorquals. Why such differences? According to researchers, these differences can be explained by the type and size of the prey of various whales, as well as their biomechanics of filtration and the drag force (the force that works against the whale\u2019s movement through the water).<\/p>\n

\u201cBalaenids open their mouths and then slowly swim through a patch of copepods [tiny crustaceans that form the basis of plankton] and filtration takes place continuously and simultaneously,\u201d says Jean Potvin, physicist, whale enthusiast and co-author of the study, in an interview with the Whales Online<\/em> team.<\/p>\n","protected":false},"excerpt":{"rendered":"

Baleen refers to the stiff plates of keratin that hang off the upper jaw of some whales, more precisely mysticetes\u2026 but is all baleen alike? Of course not! The size and shape of baleen and how it is used varies widely from one group of whales to another, reveals a study published in the Biological […]<\/p>\n","protected":false},"author":19,"featured_media":40577,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_monsterinsights_skip_tracking":false,"footnotes":""},"categories":[18],"tags":[],"class_list":["post-43044","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news"],"acf":[],"yoast_head":"\nWhales with different methods of filtering - Baleines en direct<\/title>\n<meta name=\"description\" content=\"Baleen refers to the stiff plates of keratin that hang off the upper jaw of some whales, more precisely mysticetes\u2026 but is all baleen alike? 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