Temporal separation of two fin whale call types across the eastern North Pacific

Širović, Ana; Williams, Lauren N.; Kerosky, Sara M.; Wiggins, Sean M.; Hildebrand, John A.

doi:10.1007/s00227-012-2061-z

Cited by 93 publications

(93 citation statements)

References 52 publications

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“…be composed of call-counter call interactions that may function in maintaining group cohesion or as contact calls (Sirovic et al, 2013). In this study, whether call bouts are produced by a single animal cannot be determined conclusively and the lack of ability to spatially separate the calls precluded any analysis of call-counter call interactions.…”

Section: Discussionmentioning

confidence: 92%

Non-song social call bouts of migrating humpback whales

Rekdahl¹,

Dunlop²,

Goldizen³

et al. 2015

The Journal of the Acoustical Society of America

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The use of stereotyped calls within structured bouts has been described for a number of species and may increase the information potential of call repertoires. Humpback whales produce a repertoire of social calls, although little is known about the complexity or function of these calls. In this study, digital acoustic tag recordings were used to investigate social call use within bouts, the use of bouts across different social contexts, and whether particular call type combinations were favored. Call order within bouts was investigated using call transition frequencies and information theory techniques. Call bouts were defined through analysis of inter-call intervals, as any calls within 3.9 s of each other. Bouts were produced significantly more when new whales joined a group compared to groups that did not change membership, and in groups containing multiple adults escorting a female and calf compared to adult only groups. Although social calls tended to be produced in bouts, there were few repeated bout types. However, the order in which most call types were produced within bouts was non-random and dependent on the preceding call type. These bouts appear to be at least partially governed by rules for how individual components are combined.

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Section: Discussionmentioning

confidence: 92%

Non-song social call bouts of migrating humpback whales

Rekdahl¹,

Dunlop²,

Goldizen³

et al. 2015

The Journal of the Acoustical Society of America

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“…Fin whales have been acoustically recorded off northeastern Canada [108], in the St Lawrence Estuary [109], in the Bering Sea [110], in the North Pacific and North Atlantic [111][112][113], in the Gulf of California [66,110,114,115], in Antarctica [76,86] and in the Perth Canyon [6]. Fin whales emit characteristic 1-s FM downsweeps from about 30 to 15 Hz, commonly called the "20-Hz signal" [109,114,116].…”

Section: Balaenoptera Physalus-fin Whalementioning

confidence: 99%

“…They also emit higher-frequency FM sounds of up to 310 Hz and up to 5-s duration [109,110,115], an AM "rumble" at 10-30 Hz and up to 30-s duration [109], AM "moans" up to 100 Hz, 2-s duration and 159-183 dB re 1 µPa rms @ 1 m source level [66], CW tones between 50 and 150 Hz and 0.3-0.7-s duration [109], and 34 and 68 Hz CW units arranged into 2-unit phrases of 3-s duration with 1.6-2.2 phrases/minute [66].…”

Section: Balaenoptera Physalus-fin Whalementioning

confidence: 99%

Review of Underwater and In-Air Sounds Emitted by Australian and Antarctic Marine Mammals

et al. 2017

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The study of marine soundscapes is a growing field of research. Recording hardware is becoming more accessible; there are a number of off-the-shelf autonomous recorders that can be deployed for months at a time; software analysis tools exist as shareware; raw or preprocessed recordings are freely and publicly available. However, what is missing are catalogues of commonly recorded sounds. Sounds related to geophysical events (e.g. earthquakes) and weather (e.g. wind and precipitation), to human activities (e.g. ships) and to marine animals (e.g. crustaceans, fish and marine mammals) commonly occur. Marine mammals are distributed throughout Australia's oceans and significantly contribute to the underwater soundscape. However, due to a lack of concurrent visual and passive acoustic observations, it is often not known which species produces which sounds. To aid in the analysis of Australian and Antarctic marine soundscape recordings, a literature review of the sounds made by marine mammals was undertaken. Frequency, duration and source level measurements are summarised and tabulated. In addition to the literature review, new marine mammal data are presented and include recordings from Australia of Omura's whales (Balaenoptera omurai), dwarf sperm whales (Kogia sima), common dolphins (Delphinus delphis), short-finned pilot whales (Globicephala macrorhynchus), long-finned pilot whales (G. melas), Fraser's dolphins (Lagenodelphis hosei), false killer whales (Pseudorca crassidens), striped dolphins (Stenella coeruleoalba) and spinner dolphins (S. longirostris), as well as the whistles and burst-pulse sounds of Australian pygmy killer whales (Feresa attenuata). To date, this is the most comprehensive acoustic summary for marine mammal species in Australian waters.

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“…As is the case for blue whales, fin whales also produce multiple calls, likely under different behavioral contexts (Watkins et al 1987(Watkins et al , Širović et al 2013. Thus, the decrease in calling in the spring is likely an indicator of a different behavioral state, as we know that fin whales remain in this area year-round (Forney & Barlow 1998, Širović et al 2013. At this point, it was not feasible to include additional calls, such as D and 40 Hz calls, in this analysis as there are currently no automatic detectors that function effectively across a wide range of environmental conditions for these calls.…”

Section: Data Biasesmentioning

confidence: 99%

Seven years of blue and fin whale call abundance in the Southern California Bight

irović¹,

Rice²,

Chou³

et al. 2015

Endang. Species. Res.

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Blue whales Balaenoptera musculus and fin whales B. physalus are common inhabitants of the Southern California Bight (SCB), but little is known about the spatial and temporal variability of their use of this area. To study their distribution in the SCB, high-frequency acoustic recording packages were intermittently deployed at 16 locations across the SCB from 2006 to 2012. Presence of blue whale B calls and fin whale 20 Hz calls was determined using 2 types of automatic detection methods, i.e. spectrogram correlation and acoustic energy detection, respectively. Blue whale B calls were generally detected between June and January, with a peak in September, with an overall total of over 3 million detections. Fin whale 20 Hz calls, measured via the fin whale call index, were present year-round, with the highest values between September and December, with a peak in November. Blue whale calls were more common at coastal sites and near the northern Channel Islands, while the fin whale call index was highest in the central and southern areas of the SCB, indicating a possible difference in habitat preferences of the 2 species in this area. Across years, a peak in blue whale call detections occurred in 2008, with minima in 2006 and 2007, but there was no long-term trend. There was an increase in the fin whale call index during this period. These trends are consistent with visual survey estimates for both species in Southern California, providing evidence that passive acoustics can be a powerful tool to monitor population trends for these endangered species.

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Temporal separation of two fin whale call types across the eastern North Pacific

Cited by 93 publications

References 52 publications

Non-song social call bouts of migrating humpback whales

Non-song social call bouts of migrating humpback whales

Review of Underwater and In-Air Sounds Emitted by Australian and Antarctic Marine Mammals

Seven years of blue and fin whale call abundance in the Southern California Bight

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