00000nam 2200000za 4500 9.826876 CaOODSP 20230501141950 cr ||||||||||| 161103s2016 oncbd ob f000 0 eng d CaOODSP eng eng fre n-cn--- Fs70-5/2016-091E-PDF Blue whale continuous frequentations of St. Lawrence habitats from multi-year PAM series [electronic resource] / Yvan Simard ... [et al.]. Title at head of French abstract: Fréquentation continue de la baleine bleue des habitats du Saint-Laurent à partir de la série pluriannuelle de monitorage par acoustique passive Ottawa : Fisheries and Oceans Canada, c2016. v, 14 p. : col. maps Canadian Science Advisory Secretariat research document, 1919-5044 ; 2016/091, Quebec Region Cover title. “Maurice Lamontagne Institute; Marine Science Institute, University of Québec at Rimouski.” “October 2016.” Includes bibliographical references (p. 5-7). "The endangered northwest Atlantic blue whale is a regular visitor of the Gulf of St. Lawrence where they feed upon aggregated krill. As part of the population recovery plan, a passive acoustic monitoring (PAM) observatory was set up to track the space-time patterns of blue whale use of this northwest Atlantic marginal sea from their species-specific calls from 2010 to 2015. The PAM network included 4 regular multi-year stations and 2 1-year stations covering the two Gulf entrances and the expected excursion routes. The most frequent “A-type” infrasonic call was tracked with a dedicated algorithm while the rarer and less energetic low frequency D-call was manually detected from the spectrograms, aided by an energy detector. During the monitoring period, the blue whale was present year-round in the southern Gulf of St. Lawrence, and almost year-round in the Lower Estuary. They were not detected at the northeastern station near Belle Isle Strait. No clear lag between the appearance and disappearance at the stations along the inland route from the Atlantic was observed, which does not plea in favour of a seasonal synchronous migration. The co-occurrence of detections at all sites during a large part of the annual cycle indicate a dispersed population over numerous sites of interest in the studied area, which includes periods of arrival and departures as indicated by fluctuations in call occurrence. Results clearly show that blue whales occupy the whole region, not only during summer and fall, but year-round“--Abstract, p. iv. Includes abstract in French. gccst Endangered species gccst Whales gccst Wildlife management Simard, Yvan. Canada. Department of Fisheries and Oceans. Canada. Ecosystems and Oceans Science. Canadian Science Advisory Secretariat. Maurice Lamontagne Institute. Research document (Canadian Science Advisory Secretariat) 1919-5044 ; 2016/091, Quebec Region (CaOODSP)9.507396 PDF 1,002 KB https://publications.gc.ca/collections/collection_2016/mpo-dfo/Fs70-5-2016-091-eng.pdf