Article Dans Une Revue Marine Mammal Science Année : 2020

Southeast Pacific blue whale song recorded off Isla Chañaral, northern Chile

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Determining the distribution and seasonal movements of baleen whales is fundamental to the development of conservation strategies and marine spatial planning, which ensure their continued protection (e.g., Pompa, Ehrlich, and Ceballos (2011), Mullen, Peterson, and Todd (2013), Redfern et al. (2013a, 2013b)). One method widely used to monitor distribution and movements of cetaceans is Passive Acoustic Monitoring (PAM) (e.g., Mellinger, Stafford, Moore, Dziak, and Matsumoto (2007), Van Parijs et al. (2009)). The loud, repetitive, low-frequency songs of baleen whales make these animals particularly good candidates for acoustically determining their occurrence and in turn their distribution (e.g., Stafford, Nieukirk, and Fox (1999a, 1999b), Cerchio, Jacobsen, and Norris (2001), Širović, Hildebrand, Wiggins, and Thiele (2009), Buchan, Hucke-Gaete, Rendell, and Stafford (2015)). Endangered (https://www.iucn.org/) blue whales (Balaenoptera musculus) produce distinct song types recorded in different oceanic regions with largely distinct spatial and temporal distributions (e.g., McDonald, Mesnick, and Hildebrand (2006) and references therein, Stafford, Chapp, Bohnenstiel, and Tolstoy (2011), Samaran et al. (2013), Buchan, Hucke-Gaete, Rendell, and Stafford (2014), Buchan et al. (2015), Balcazar et al. (2017)). Song in blue whales is assumed to serve some reproductive function as it is believed to be produced only by males (Oleson et al., 2007a) and is produced throughout the animals' migratory range (Stafford et al. (1999a), Stafford, Nieukirk, and Fox (2001)). Blue whale song remains relatively stable over time, although there is some intra-annual variation in song production (Oleson, Wiggins, and Hildebrand, 2007b) and a decrease in the frequency of tonal song components has been reported over decadal timescales (McDonald, Hildebrand, and Mesnick (2009), Gavrilov, McCauley, and Gedamke (2012)). Therefore, PAM offers a very useful method to monitor the distribution of blue whale acoustic groups worldwide.

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hal-03199531 , version 1 (16-04-2021)

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Julie Patris, Susannah J Buchan, Giselle Alosilla, Naysa Balcazar- Cabrera, Franck Malige, et al.. Southeast Pacific blue whale song recorded off Isla Chañaral, northern Chile. Marine Mammal Science, 2020, 36 (4), pp.1339 - 1346. ⟨10.1111/mms.12738⟩. ⟨hal-03199531⟩
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