{"id":10318,"date":"2023-11-02T16:47:37","date_gmt":"2023-11-02T15:47:37","guid":{"rendered":"https:\/\/julienmarchal.fr\/?p=10318"},"modified":"2023-11-02T16:50:31","modified_gmt":"2023-11-02T15:50:31","slug":"saison-2022-au-canada-5","status":"publish","type":"post","link":"https:\/\/julienmarchal.fr\/en-us\/acoustique-mammiferes-marins\/","title":{"rendered":"Acoustics on marine mammals"},"content":{"rendered":"
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Hello to all,<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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In October 2023, I completed a contract in acoustics as - Passive Acoustics System Operator (PAM) - in the detection and automatic identification of marine mammal vocalizations. We used software parameterized for the frequencies emitted by certain marine animals. <\/span>during the dredging of the Rivi\u00e8re-du-Loup marina (QC, Canada). We're in the Saguenay-St. Lawrence Marine Park, and the beluga (Delphinapterus leucas<\/em>), which lives year-round, occasionally frequents the area. So, in the event of intrusion by this protected animal into the dredging or sediment dumping zone a few kilometers from the port, work had to be stopped until the animal had left the area. The sounds were retransmitted on computer screens in a trailer on the marina quay. Sometimes I could hear the animal's sounds. We had three hydrophones around the dock and another at the release. I had to be on the lookout for the vocalizations of a minke whale (Balaenoptera acutorostrata<\/em>) or a harbour porpoise (Phocoena phocoena).<\/em>\u00a0<\/em>Even if these two species are not endangered and rare in the area, if they were detected on my spectrogram, I had to stop dredging. <\/span>Several acousticians took it in turns, 24 hours a day, to carry out this mission, as soon as the weather allowed the work to be carried out by the marine firm. An observer (OMM) is out during the day in case a beluga whale enters the 400-meter perimeter, and can also call a halt to the work. This dredging is done every autumn to enable the ferry (with cars) to make the trip from Rivi\u00e8re-du-Loup (QC, Canada) to Saint-Sim\u00e9on (QC, Canada) on the north shore of the river.\u00a0<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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Sincerely.<\/span><\/p>

Terrebonne, Quebec\/Canada, November<\/span>\u00a02023<\/span><\/p>

Julien Marchal<\/cite><\/p><\/blockquote>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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During the month of October 2023, I carried out a contract as a Marine Mammal Observer (MMO) and Passive Acoustic System Operator (PAM), available to a consulting engineering firm during dredging for the ferry.<\/p>","protected":false},"author":3,"featured_media":10258,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[99],"tags":[],"class_list":["post-10318","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog-general"],"yoast_head":"\nJULIEN MARCHAL — Acoustique sur les mammif\u00e8res marins<\/title>\n<meta name=\"description\" content=\"Contrat en acoustique depuis le quai sur les mammif\u00e8res dans la marina de Rivi\u00e8re-du-Loup au Canada pendant le dragage.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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