Bowhead and beluga whale acoustic detections in the western Beaufort Sea 2008-2018.

The Distributed Biological Observatory (DBO) was established to detect environmental changes in the Pacific Arctic by regular monitoring of biophysical responses in each of 8 DBO regions. Here we examine the occurrence of bowhead and beluga whale vocalizations in the western Beaufort Sea acquired by...

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Autores principales:	Kathleen M Stafford, John J Citta, Stephen R Okkonen, Jinlun Zhang
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/8b8599f5b77e4ac8b7cbca1fcfb4b92d
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spelling	oai:doaj.org-article:8b8599f5b77e4ac8b7cbca1fcfb4b92d2021-12-02T20:09:53ZBowhead and beluga whale acoustic detections in the western Beaufort Sea 2008-2018.1932-620310.1371/journal.pone.0253929https://doaj.org/article/8b8599f5b77e4ac8b7cbca1fcfb4b92d2021-01-01T00:00:00Zhttps://doi.org/10.1371/journal.pone.0253929https://doaj.org/toc/1932-6203The Distributed Biological Observatory (DBO) was established to detect environmental changes in the Pacific Arctic by regular monitoring of biophysical responses in each of 8 DBO regions. Here we examine the occurrence of bowhead and beluga whale vocalizations in the western Beaufort Sea acquired by acoustic instruments deployed from September 2008-July 2014 and September 2016-October 2018 to examine inter-annual variability of these Arctic endemic species in DBO Region 6. Acoustic data were collected on an oceanographic mooring deployed in the Beaufort shelfbreak jet at ~71.4°N, 152.0°W. Spectrograms of acoustic data files were visually examined for the presence or absence of known signals of bowhead and beluga whales. Weekly averages of whale occurrence were compared with outputs of zooplankton, temperature and sea ice from the BIOMAS model to determine if any of these variables influenced whale occurrence. In addition, the dates of acoustic whale passage in the spring and fall were compared to annual sea ice melt-out and freeze-up dates to examine changes in phenology. Neither bowhead nor beluga whale migration times changed significantly in spring, but bowhead whales migrated significantly later in fall from 2008-2018. There were no clear relationships between bowhead whales and the environmental variables, suggesting that the DBO 6 region is a migratory corridor, but not a feeding hotspot, for this species. Surprisingly, beluga whale acoustic presence was related to zooplankton biomass near the mooring, but this is unlikely to be a direct relationship: there are likely interactions of environmental drivers that result in higher occurrence of both modeled zooplankton and belugas in the DBO 6 region. The environmental triggers that drive the migratory phenology of the two Arctic endemic cetacean species likely extend from Bering Sea transport of heat, nutrients and plankton through the Chukchi and into the Beaufort Sea.Kathleen M StaffordJohn J CittaStephen R OkkonenJinlun ZhangPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 16, Iss 6, p e0253929 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Kathleen M Stafford John J Citta Stephen R Okkonen Jinlun Zhang Bowhead and beluga whale acoustic detections in the western Beaufort Sea 2008-2018.
description	The Distributed Biological Observatory (DBO) was established to detect environmental changes in the Pacific Arctic by regular monitoring of biophysical responses in each of 8 DBO regions. Here we examine the occurrence of bowhead and beluga whale vocalizations in the western Beaufort Sea acquired by acoustic instruments deployed from September 2008-July 2014 and September 2016-October 2018 to examine inter-annual variability of these Arctic endemic species in DBO Region 6. Acoustic data were collected on an oceanographic mooring deployed in the Beaufort shelfbreak jet at ~71.4°N, 152.0°W. Spectrograms of acoustic data files were visually examined for the presence or absence of known signals of bowhead and beluga whales. Weekly averages of whale occurrence were compared with outputs of zooplankton, temperature and sea ice from the BIOMAS model to determine if any of these variables influenced whale occurrence. In addition, the dates of acoustic whale passage in the spring and fall were compared to annual sea ice melt-out and freeze-up dates to examine changes in phenology. Neither bowhead nor beluga whale migration times changed significantly in spring, but bowhead whales migrated significantly later in fall from 2008-2018. There were no clear relationships between bowhead whales and the environmental variables, suggesting that the DBO 6 region is a migratory corridor, but not a feeding hotspot, for this species. Surprisingly, beluga whale acoustic presence was related to zooplankton biomass near the mooring, but this is unlikely to be a direct relationship: there are likely interactions of environmental drivers that result in higher occurrence of both modeled zooplankton and belugas in the DBO 6 region. The environmental triggers that drive the migratory phenology of the two Arctic endemic cetacean species likely extend from Bering Sea transport of heat, nutrients and plankton through the Chukchi and into the Beaufort Sea.
format	article
author	Kathleen M Stafford John J Citta Stephen R Okkonen Jinlun Zhang
author_facet	Kathleen M Stafford John J Citta Stephen R Okkonen Jinlun Zhang
author_sort	Kathleen M Stafford
title	Bowhead and beluga whale acoustic detections in the western Beaufort Sea 2008-2018.
title_short	Bowhead and beluga whale acoustic detections in the western Beaufort Sea 2008-2018.
title_full	Bowhead and beluga whale acoustic detections in the western Beaufort Sea 2008-2018.
title_fullStr	Bowhead and beluga whale acoustic detections in the western Beaufort Sea 2008-2018.
title_full_unstemmed	Bowhead and beluga whale acoustic detections in the western Beaufort Sea 2008-2018.
title_sort	bowhead and beluga whale acoustic detections in the western beaufort sea 2008-2018.
publisher	Public Library of Science (PLoS)
publishDate	2021
url	https://doaj.org/article/8b8599f5b77e4ac8b7cbca1fcfb4b92d
work_keys_str_mv	AT kathleenmstafford bowheadandbelugawhaleacousticdetectionsinthewesternbeaufortsea20082018 AT johnjcitta bowheadandbelugawhaleacousticdetectionsinthewesternbeaufortsea20082018 AT stephenrokkonen bowheadandbelugawhaleacousticdetectionsinthewesternbeaufortsea20082018 AT jinlunzhang bowheadandbelugawhaleacousticdetectionsinthewesternbeaufortsea20082018
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Bowhead and beluga whale acoustic detections in the western Beaufort Sea 2008-2018.

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