{"id":50058,"date":"2020-03-19T14:52:57","date_gmt":"2020-03-19T14:52:57","guid":{"rendered":"https:\/\/baleinesendirect.org\/saccrocher-a-travers-les-epoques-des-balanes-balises-sur-les-baleines\/"},"modified":"2020-03-23T14:28:40","modified_gmt":"2020-03-23T14:28:40","slug":"using-barnacles-to-reconstruct-ancient-whale-migrations","status":"publish","type":"post","link":"https:\/\/baleinesendirect.org\/en\/using-barnacles-to-reconstruct-ancient-whale-migrations\/","title":{"rendered":"Using Barnacles to Reconstruct Ancient Whale Migrations"},"content":{"rendered":"

Whales, which have been around for roughly 30 million years, are estimated to have reached their current size 4.5 million years ago. On the geological scale, this is therefore still a \u201crecent\u201d change, which probably took place over a very short period of time. It is believed that this rapid evolution was triggered by a geoclimatic upheaval that moved the whales\u2019 seasonal feeding grounds farther away from each other and therefore forced the animals to make longer journeys\u00a0. Gradually, it is believed that the more robust individuals prevailed at the expense of the smaller, less hardy individuals. In order to study the evolution of their gigantism, researchers from the University of Berkeley are attempting to reconstruct the migratory movements of the baleen whales of yesteryear.<\/p>

It is possible to determine the path a whale has taken by studying its baleen, which show traces of the food the animal has consumed in different regions. However, these keratin structures do not easily fossilize. As a result, they cannot be used to trace whales\u2019 historic migratory movements. Against all expectations, researchers succeeded instead in their trip back in time thanks to a crustacean measuring just a few centimetres long whose shell is more resistant to the wear of time: the barnacle.<\/p>\n","protected":false},"excerpt":{"rendered":"

Whales, which have been around for roughly 30 million years, are estimated to have reached their current size 4.5 million years ago. On the geological scale, this is therefore still a \u201crecent\u201d change, which probably took place over a very short period of time. It is believed that this rapid evolution was triggered by a […]<\/p>\n","protected":false},"author":29,"featured_media":49979,"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-50058","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news"],"acf":[],"yoast_head":"\nUsing Barnacles to Reconstruct Ancient Whale Migrations - Baleines en direct<\/title>\n<meta name=\"description\" content=\"Whales, which have been around for roughly 30 million years, are estimated to have reached their current size 4.5 million years ago. 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