Fin whale vocalizations observed with ocean bottom seismometers of cabled observatories off east Japan Pacific Ocean

Iwase, Ryoichi

doi:10.7567/jjap.54.07hg03

Cited by 15 publications

(6 citation statements)

References 15 publications

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“…In addition to the migratory movements, acoustic studies can also give information on migratory routes. In the Northern Hemisphere acoustic recordings have demonstrated migratory winter presence of fin whales in the eastern and western regions of the North Pacific 32,39 and the North Atlantic Oceans 31,40,41 . Taken together, these acoustical studies describe an aggregation of fin whales in polar waters in summer months, but different migration routes throughout the oceans for winter with some whales following a south easterly migration route, and others travelling south westerly.…”

Section: Introductionmentioning

confidence: 99%

Fin whale (Balaenoptera physalus) migration in Australian waters using passive acoustic monitoring

Aulich

McCauley

Saunders

et al. 2019

Sci Rep

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The fin whale is a globally endangered species and is listed as threatened in Australia, however no peer-reviewed studies are available to indicate the migratory movements of the species in Australian waters. This study uses passive acoustic monitoring as a tool to identify the migratory movements of fin whales in Australian waters. Sampling was conducted from eight locations around Australia between 2009 and 2017, providing a total of 37 annual migratory records. Taken together, our observations provide evidence of fin whale migration through Australian waters, with earliest arrival of the animals recorded on the Western Australian coast, at Cape Leeuwin in April. The whales travel through Cape Leeuwin, migrating northward along the Western Australian coast to the Perth Canyon (May to October), which likely acts as a way-station for feeding. Some whales continue migrating as far north as Dampier (19°S). On Australia’s east coast, at Tuncurry, fin whale seasonal presence each year occurred later, from June to late September/October. A total of only 8,024 fin whale pulses were recorded on the east coast, compared to 177,328 pulses recorded at the Perth Canyon. We suggest these differences, as well as the spatial separation between coasts, provide preliminary evidence that the fin whales present on the east and west coasts constitute separate sub-populations.

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Section: Introductionmentioning

confidence: 99%

Fin whale (Balaenoptera physalus) migration in Australian waters using passive acoustic monitoring

Aulich

McCauley

Saunders

et al. 2019

Sci Rep

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“…Using PAM, the seasonal distribution of fin whales has been widely reported in the Northern Hemisphere over the last two decades. The literature outlines a seasonal migration of fin whales out of high-latitude, polar waters (Stafford et al, 2007;Simon et al, 2010;Delarue et al, 2013;Davis et al, 2020) to lowerlatitude, temperate waters for the winter months along the east and west coasts of the North Atlantic (Morano et al, 2012;Harris et al, 2013;Davis et al, 2020) and North Pacific Oceans (S ̌irovicé t al., 2013;Iwase, 2015). Acoustic studies of fin whales have also reported the presence of fin whales in the winter season in the Bering Sea (Stafford et al, 2007;Oleson et al, 2014;S ̌irovićet al, 2015) and in waters off Greenland (Simon et al, 2010), suggesting that not all fin whales may migrate.…”

Section: Introductionmentioning

confidence: 99%

Seasonal Distribution of the Fin Whale (Balaenoptera physalus) in Antarctic and Australian Waters Based on Passive Acoustics

et al. 2022

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The fin whale is listed as globally vulnerable, with ongoing threats to their population, yet little is known about the distribution and movements of the Southern Hemisphere sub-species, Balaenoptera physalus quoyi. This study assesses fin whale distribution in the Southern Hemisphere analysing acoustic recordings from 15 locations in Antarctic and Australian waters from 2002 to 2019. A seasonal acoustic presence of fin whales in Antarctic waters from late austral summer to autumn (February to June) with long-term, consistent annual usage areas was identified at the Southern Kerguelen Plateau and Dumont d’Urville sites. In comparison, limited vocal presence of fin whales was observed at the Casey site. In Australian waters, fin whales were seasonally present from austral autumn to mid-spring (May to October) on east and west coasts, with a decadal pattern of acoustic presence observed at Cape Leeuwin, WA. Two migratory pathways are identified, from the Indian sector of Antarctica to the west coast of Australia and from the Pacific sector of Antarctica to the east coast of Australia. The identified seasonal distributions and migratory pathways provide valuable information to aid in monitoring the recovery of this vulnerable sub-species. We suggest the identified distribution and dispersal from the Southern Kerguelen Plateau and Dumont d’Urville sites to the west and east coasts of Australia respectively, as well as the spatial separation between Antarctic sites, provide preliminary evidence of separate sub-populations of the Southern Hemisphere sub-species of fin whale.

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“…1,2) As acoustic monitoring is a very suitable method of monitoring the ocean, many kinds of acoustic measurement tools and methods are used in the ocean. [3][4][5] The authors treated data of long-range sound propagations in the Central Pacific Ocean in 2000 to reveal ocean phenomena such as temperature, current, and tidal effects. [6][7][8][9] Ocean acoustic tomography is a technique to survey the ocean condition.…”

Section: Introductionmentioning

confidence: 99%

Acoustical environment measurement at a very shallow port: Trial case in Hashirimizu Port

Ogasawara¹,

Mori²

2016

Jpn. J. Appl. Phys.

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Recently, the needs for coastal environment measurement has been increasing for many purposes, such as fishing, weather forecasting, ocean noise measurement for power plants, and coastal security. Acoustical measurement is one of the solutions because it can cover a wide area with few sensors, and it is possible to monitor long term or in real time. In this study, a small-scale reciprocal sound travel experiment was carried out in Hashirimizu Port for coastal environment measurement, such as current speed and water temperature. Since the distance between the surface and the transducer becomes short according to the tidal effect, the direct signal is canceled by the surface-reflected signal under a specific condition. However, even under such a condition, mean water temperature could be estimated from the reciprocal travel time using bottom-reflected signals. The current along the travel path was a reasonable value. It is possible to obtain a special current speed with another reciprocal path, which is in a direction perpendicular to the current travel path.

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Fin whale vocalizations observed with ocean bottom seismometers of cabled observatories off east Japan Pacific Ocean

Cited by 15 publications

References 15 publications

Fin whale (Balaenoptera physalus) migration in Australian waters using passive acoustic monitoring

Fin whale (Balaenoptera physalus) migration in Australian waters using passive acoustic monitoring

Seasonal Distribution of the Fin Whale (Balaenoptera physalus) in Antarctic and Australian Waters Based on Passive Acoustics

Acoustical environment measurement at a very shallow port: Trial case in Hashirimizu Port

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