Diel changes in ribbon seal Histriophoca fasciata vocalizations during sea ice presence in the Nemuro Strait, Sea of Okhotsk

Otsuki, Mayuko; Akamatsu, Tomonari; Nobetsu, Takahiro; Mizuguchi, Daisuke; Mitani, Yoko

doi:10.1007/s00300-017-2203-3

Cited by 5 publications

(6 citation statements)

References 14 publications

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“…During the period of sea ice presence in Nemuro Strait in February and March, we did not detect any cetacean vocalizations. However, vocalizations of ice‐breeding ribbon seals were found to occur during the same time period (Otsuki et al, 2018). Spotted seals (Mizuguchi et al, 2016) and Steller sea lions (Goto et al, 2017) were also visually observed in winter and spring, although these studies were not conducted during the same time period as our study.…”

Section: Discussionmentioning

confidence: 99%

“…The A‐tag was set next to the AUSOMS mini and recorded from April to September 2013. The AUSOMS‐mini was also fastened to the buoy of a gill net to make recordings in February 2013 at a depth of 180 m (43°58.39′N, 145°12.92′E; Otsuki et al, 2018). A timeline of acoustic and visual data collection is shown in Figure 2.…”

Section: Methodsmentioning

confidence: 99%

“…These rates were 44.1 and 22 kHz for the Waveform Audio File (WAV) and Windows Media Audio (WMA) formats, respectively. The AUSOMS‐mini uses four AA batteries, and recorded continuously for up to 9 days, alternating between WAV for 2 hr and WMA for 22 hr (see Otsuki et al, 2018 for details). The A‐tag, an event recorder designed to record click trains (i.e., the sound pressure of each click), does not store sound waveforms.…”

Section: Methodsmentioning

confidence: 99%

“…One‐hour blocks were assigned to either day or night (National Astronomical Observatory of Japan, 2017), with blocks that crossed these boundaries being assigned to the diel period containing the greatest portion of that hour (Soldevilla et al, 2010). The period and the percentage of sea ice covering Nemuro Strait were calculated based on Otsuki et al (2018) using the geographic information system QGIS3.10 (http://www.qgis.org). Ice coverage data were downloaded from the National Snow & Ice Data Center (Fetterer et al, 2010).…”

Section: Methodsmentioning

confidence: 99%

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Seasonal and diel changes in cetacean vocalizations monitored by passive acoustic methods in Nemuro Strait adjacent to the Shiretoko World Natural Heritage Site

Otsuki

Akamatsu²,

Nobetsu

et al. 2021

Marine Mammal Science

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UNESCO World Natural Heritage sites are established to ensure the long‐term conservation of natural areas. Nemuro Strait in northern Japan is adjacent to the Shiretoko World Natural Heritage Site, and attracts various trophic levels of marine species, including marine mammals. Although the coexistence of humans and marine mammals is an important issue in this area, the temporal habitat use of cetaceans in this area is unknown. Here, we document seasonal and diel changes in cetacean vocalizations collected using passive acoustic recording devices during November 2012–March 2014. Killer whale calls occurred in spring and summer, and sperm whale clicks were detected in summer. Pacific white‐sided dolphin calls were recorded in summer and late fall. No cetaceans were recorded during the sea ice period in February and March. The dolphin calls and unknown click trains were significantly more frequent at night. In contrast, marginal diel changes in killer whale calls were detected. Our results suggest that the majority of cetaceans utilize Nemuro Strait at night during the ice‐free period, and we provide new insights into the habitat use and diversity of marine mammals in the Strait.

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Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Seasonal and diel changes in cetacean vocalizations monitored by passive acoustic methods in Nemuro Strait adjacent to the Shiretoko World Natural Heritage Site

Otsuki

Akamatsu²,

Nobetsu

et al. 2021

Marine Mammal Science

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“…Furthermore, beluga calling rates vary as a function of group behavioral state (Panova et al, 2012;Sjare & Smith, 1986), although seasonal variation in vocal behavior is unknown. Ribbon seal calls may be produced by males in reproductive and/or territorial activities (Otsuki, Akamatsu, Nobetsu, Mizuguchi, & Mitani, 2018;Watkins & Ray, 1977), although less is known about this species' vocal behavior. Therefore, females, young animals, and nonvocalizing individuals are likely missed by PAM, which is premised on the detection of these call types.…”

Section: Variability In Acoustic Detectionsmentioning

confidence: 99%

Seasonal variation in Arctic marine mammal acoustic detection in the northern Bering Sea

Chou

Antunes

Sardelis

et al. 2019

Marine Mammal Science

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Declines in Arctic sea ice cover are influencing the distribution of protected endemic marine mammals, many of which are important for local Indigenous Peoples, and increasing the presence of potentially disruptive industrial activities. Due to increasing conservation concerns, we conducted the first year‐round acoustic monitoring of waters off Gambell and Savoonga (St. Lawrence Island, Alaska), and in the Bering Strait to quantify vocalizing presence of bowhead whales, belugas, walruses, bearded seals, and ribbon seals. Bottom‐mounted archival acoustic recorders collected data for up to 10 months per deployment between 2012 and 2016. Spectrograms were analyzed for species‐typical vocalizations, and daily detection rates and presence/absence were calculated. Generalized additive models were used to model call presence as a function of time‐of‐year, sea surface temperature, and sea ice concentration. We identified seasonality in call presence for all species, corroborating previous acoustic and distribution studies, and identified finer‐scale spatiotemporal distribution via occurrence of call presence between different monitoring sites. Time‐of‐year was the strongest significant effect on call presence for all species. These data provide important information on Arctic endemic species' spatiotemporal distributions in biologically and culturally important areas within a rapidly changing Arctic region.

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Acoustic occurrence and behavior of ribbon seals (Histriophoca fasciata) in the Bering, Chukchi, and Beaufort seas

Frouin‐Mouy¹,

Mouy²,

Berchok

et al. 2019

Polar Biol

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Diel changes in ribbon seal Histriophoca fasciata vocalizations during sea ice presence in the Nemuro Strait, Sea of Okhotsk

Cited by 5 publications

References 14 publications

Seasonal and diel changes in cetacean vocalizations monitored by passive acoustic methods in Nemuro Strait adjacent to the Shiretoko World Natural Heritage Site

Seasonal and diel changes in cetacean vocalizations monitored by passive acoustic methods in Nemuro Strait adjacent to the Shiretoko World Natural Heritage Site

Seasonal variation in Arctic marine mammal acoustic detection in the northern Bering Sea

Acoustic occurrence and behavior of ribbon seals (Histriophoca fasciata) in the Bering, Chukchi, and Beaufort seas

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