Marine mammal acoustic detections in the northeastern Chukchi Sea, September 2007–July 2011

Hannay, David; Delarue, Julien; Mouy, Xavier; Martin, Bruce; Leary, Del; Oswald, Julie N.; Vallarta, Jonathan

doi:10.1016/j.csr.2013.07.009

Cited by 85 publications

(74 citation statements)

References 48 publications

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“…North Pacific walrus Odobenus rosmarus and gray whale Eschrichtius robustus, produce knocks that are easily distinguished from gunshots (e.g. Stirling et al 1987, Hannay et al 2013, Youngson & Darling 2016. Furthermore, like bowhead whales, these species are not typically present in the study area during the July to September time period (Burns 1970, Fay 1982, and were not sighted during our surveys.…”

Section: Other Sources Of Impulsive Sounds In the Bering Seamentioning

confidence: 98%

Gunshot call production by the North Pacific right whale Eubalaena japonica in the southeastern Bering Sea

Crance¹,

Berchok²,

Keating³

2017

Endang. Species. Res.

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During dedicated surveys for the Critically Endangered eastern stock of North Pacific right whales Eubalaena japonica (NPRW) in the Bering Sea, focal follows (FFs) were combined with passive acoustic monitoring to correlate vocal activity with dive behavior. During FFs, impulsive gunshot calls (hereafter 'gunshots'), similar to those produced by other right whale populations, were localized to male and female NPRWs. The timing of gunshots correlated strongly with diving behavior observed during the FFs. Log survivorship analysis of inter-blow intervals showed a bout criterion interval of 40 s, separating the data into shorter surfacings and longer dives. For both, gunshots were skewed closer to the end of the sequence (modal gunshot to blow times: 5 s for dives, 7 s for surfacings) than the beginning (modal blow to gunshot times: 22 s for dives, 13 s for surfacings). Gunshots were more commonly produced during dives than surfacings. Mean gunshot calling rate during FFs was 133.0 calls h −1 (range: 38.9−425.0). Other NPRW calls, including upcalls, the predominant call used to identify right whales acoustically, were not detected during the FFs. To determine comparative call detection rates, an additional 180 h of non-FF recordings were analyzed. Gunshots were detected ~50 times more frequently than upcalls (mean: 228. . This is the first study to definitively attribute gunshots to NPRW, and demonstrates the importance of including gunshots in passive acoustic studies, which will greatly increase NPRW detectability while supporting more accurate determinations of their spatio-temporal distribution.

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Section: Other Sources Of Impulsive Sounds In the Bering Seamentioning

confidence: 98%

Gunshot call production by the North Pacific right whale Eubalaena japonica in the southeastern Bering Sea

Crance¹,

Berchok²,

Keating³

2017

Endang. Species. Res.

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“…Continuous data on species presence are not possible for other survey methods, such as visual surveys, in the Arctic due to sea ice. Indeed, PAM has been used throughout other areas of Arctic North America for monitoring marine mammals, including the Bering Sea (Moore et al 2006;Munger et al 2008;Stafford et al 2010), western Beaufort Sea (Moore et al 2006;Hauser et al 2017a), Chukchi Sea (Delarue et al 2009;Blackwell et al 2012;Hannay et al 2013;Jones et al 2014;Clark et al 2015;Frouin-Mouy et al 2016), and Baffin Bay (FrouinMouy et al 2017;Marcoux et al 2017), and acoustic monitoring has even been used successfully as a tool for studying the distribution of seals under the ice in the winter (Calvert and Stirling 1985;Cleator and Stirling 1990;MacIntyre et al 2013;Jones et al 2014;Frouin-Mouy et al 2016). …”

Section: Introductionmentioning

confidence: 99%

Seasonal patterns in acoustic detections of marine mammals near Sachs Harbour, Northwest Territories

et al. 2017

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The Arctic is changing rapidly, leading to changes in habitat availability and increased anthropogenic disturbance. Information on the distribution of animals is needed as these changes occur. We examine seasonal presence of marine mammals in the western Canadian Arctic near Sachs Harbour, Northwest Territories, using passive acoustic monitoring between 2015 and 2016. We also examined the influence of environmental variables (ice concentration and distance, wind speed) on the presence of these species. Both bowhead whales (Balaena mysticetus) and beluga whales (Delphinapterus leucas) arrived in late April, and belugas departed in mid-August, while bowheads departed in late October. Bearded seal (Erignathus barbatus) vocalizations began in October, peaked from April through June, and stopped in early July. Ringed seals (Pusa hispida) vocalized occasionally in all months, but were generally quiet. Whales migrated in as the ice broke up and migrated out before ice formed in the autumn. Bearded seals started vocalizing as ice formed and stopped once ice was almost gone. Given the importance of sea ice to the timing of migration of whales and vocalization by bearded seals, the trends that we present here may change in the future due to the increasing ice-free season caused by climate change. Our study therefore serves as a baseline with which to monitor future change.Key words: climate change, conservation, passive acoustic monitoring, sea ice.Résumé : L'Arctique change rapidement, menant à des changements dans la disponibilité des habitats et l'augmentation des perturbations anthropiques. Les informations sur la répartition des animaux sont nécessaires à mesure que ces changements surviennent. Nous examinons la présence saisonnière de mammifères marins dans l'ouest de l'Arctique canadien près du havre Sachs, dans les Territoires du Nord-Ouest, en faisant de la surveillance acoustique passive entre 2015 et 2016. Nous avons aussi examiné les effets des variables environnementales (la concentration et la distance de la glace, la vitesse des vents) sur la présence de ces espèces. Tant les baleines boréales (Balaena mysticetus) que les bélugas (Delphinapterus leucas) sont arrivés à la fin avril et les bélugas sont repartis à la miaoût, tandis que les baleines boréales sont reparties à la fin octobre. Les vocalisations de phoques barbus (Erignathus barbatus) ont commencé en octobre, ont atteint un niveau maximal d'avril à juin et se sont arrêtées début juillet. Bien qu'ils aient été généralement silencieux, les phoques annelés (Pusa hispida) ont vocalisé de temps à autre au cours de tous les mois. Les baleines ont migré dans la région lorsque la glace s'est dispersée et ont migré hors

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“…Passive acoustic monitoring using multiple recorders is a reliable method for measuring temporal and spatial distributions of sound-producing marine mammals over large areas for long periods, as well as in remote locations and during weather conditions or seasons that would otherwise prohibit direct observation (e.g., Hannay et al, 2013). Acoustic detection and classification of marine mammal calls require that animals produce sounds that 1) have sufficient amplitude to be detected in the presence of other sounds and 2) are species-unique to allow confident species identification.…”

Section: Introductionmentioning

confidence: 99%

Seasonal Trends in Acoustic Detection of Marine Mammals in Baffin Bay and Melville Bay, Northwest Greenland + Supplementary Appendix 1 (See Article Tools)

Frouin‐Mouy¹,

Kowarski²,

Martin³

et al. 2017

ARCTIC

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ABSTRACT. The expansion of hydrocarbon exploration in northwest Greenland has made it increasingly important to understand the occurrence of marine mammals in the region. We describe the seasonal occurrence of marine mammals and the spatial distribution of their calls in Baffin Bay and Melville Bay. Four Autonomous Multichannel Acoustic Recorders (AMARs) were deployed during summer 2012 (late July to early October), five recorders during September 2013, and two recorders from late September 2013 to early September 2014. The call presence of several species was analyzed using automatic call detection and manual verification analysis methods. A novel approach to discern narwhal (Monodon monoceros) clicks from beluga (Delphinapterus leucas) clicks was implemented during the verification process. Narwhal calls were detected in spring and fall, showing a south-to-north migration pattern in spring and a north-to-south migration pattern in fall. Few beluga whales were detected during fall 2013 and spring 2014. Bearded seal (Erignathus barbatus) calls were detected mainly during spring (mating period). A small number of bowhead whale calls (Balaena mysticetus) were detected during fall 2013 and spring and summer 2014. For the first time at this latitude in Baffin Bay, long-finned pilot whales (Globicephala melas) and sperm whales (Physeter macrocephalus) were detected during summer and fall. Our results suggest that the presence of marine mammals in Baffin Bay and Melville Bay is governed mainly by the annual cycle of sea ice formation and decay.

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Marine mammal acoustic detections in the northeastern Chukchi Sea, September 2007–July 2011

Cited by 85 publications

References 48 publications

Gunshot call production by the North Pacific right whale Eubalaena japonica in the southeastern Bering Sea

Gunshot call production by the North Pacific right whale Eubalaena japonica in the southeastern Bering Sea

Seasonal patterns in acoustic detections of marine mammals near Sachs Harbour, Northwest Territories

Seasonal Trends in Acoustic Detection of Marine Mammals in Baffin Bay and Melville Bay, Northwest Greenland + Supplementary Appendix 1 (See Article Tools)

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