STRUCTURAL CHARACTERISTICS OF PULSED CALLS OF LONG-FINNED PILOT WHALES<i>GLOBICEPHALA MELAS</i>

Nemiroff, Leah; Whitehead, Hal

doi:10.1080/09524622.2009.9753615

Cited by 38 publications

(33 citation statements)

References 43 publications

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“…It has been suggested that signals with a graded structure could convey information on the status, motivation, behavioral context, and individual features of the sender (Murray et al, 1998a, b;Scheer, 2013). According to this supposition, it could be possible that the rise in the rate of clicks reported in the false killer whales of Qingdao aquarium during the pre-feeding intervals might be explained by an increase in whistles with graded structure which could indicate an escalation of the whales' excitement (Nemiroff and Whitehead, 2009;Sayigh et al, 2013;Scheer, 2013). However, a detailed analysis of whistle types to verify the presence of whistles with a graded structure was outside the scope of this paper.…”

Section: Discussionmentioning

confidence: 99%

Variation in the emission rate of sounds in a captive group of false killer whales Pseudorca crassidens during feedings: possible food anticipatory vocal activity?

Platto

Wang

2015

Chin. J. Ocean. Limnol.

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This study examines whether a group of captive false killer whales ( Pseudorca crassidens ) showed variations in the vocal rate around feeding times. The high level of motivation to express appetitive behaviors in captive animals may lead them to respond with changes of the behavioral activities during the time prior to food deliveries which are referred to as food anticipatory activity. False killer whales at Qingdao Polar Ocean World (Qingdao, China) showed signifi cant variations of the rates of both the total sounds and sound classes (whistles, clicks, and burst pulses) around feedings. Precisely, from the Transition interval that recorded the lowest vocalization rate (3.40 s/m/d), the whales increased their acoustic emissions upon trainers' arrival (13.08 s/m/d). The high rate was maintained or intensifi ed throughout the food delivery (25.12 s/m/d), and then reduced immediately after the animals were fed (9.91 s/m/d). These changes in the false killer whales sound production rates around feeding times supports the hypothesis of the presence of a food anticipatory vocal activity. Although sound rates may not give detailed information regarding referential aspects of the animal communication it might still shed light about the arousal levels of the individuals during diff erent social or environmental conditions. Further experiments should be performed to assess if variations of the time of feeding routines may aff ect the vocal activity of cetaceans in captivity as well as their welfare.

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Section: Discussionmentioning

confidence: 99%

Variation in the emission rate of sounds in a captive group of false killer whales Pseudorca crassidens during feedings: possible food anticipatory vocal activity?

Platto

Wang

2015

Chin. J. Ocean. Limnol.

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“…It is important to note that acoustic analysis based on automatic detectors alone (without manual verification) is not reliable for some species, including long-finned pilot whales, in noisy environment conditions (faint calls). Long-finned pilot whales produce typical delphinid sounds, such as clicks, buzzes, and a variety of pulsed calls including whistles similar to those of narwhals and beluga whales (Weilgart and Whitehead, 1990;Nemiroff and Whitehead, 2009). In this study, long-finned pilot whale -like calls were refuted or accepted on the basis of expert opinions on the whistles and time of year, as this species does not occur in icecovered areas (Nemiroff and Whitehead, 2009).…”

Section: Marine Mammal Acoustic Detectionmentioning

confidence: 99%

“…To discriminate between such species during manual analysis, we focused on calls known to be species-unique. Longfinned pilot whales were identified by their repeated pulsed calls (Nemiroff and Whitehead, 2009) and the time of year of the calls, as they are not known to occur in ice-covered areas. Distinguishing narwhal calls from beluga calls was more challenging, as both species occur in ice-covered areas.…”

Section: Marine Mammal Acoustic Detectionmentioning

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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“…CW tones have been reported at 1-8 kHz, 0.7-3-s duration off Newfoundland [173]. Burst-pulses cover a broader band (100-22,000 Hz) and last 0.1-2.2 s [157,175]. Biphonations have been reported as well as a graded structure of burst-pulse to whistle transitions [157,175].…”

Section: Globicephala Melas-long-finned Pilot Whalementioning

confidence: 99%

“…Burst-pulses cover a broader band (100-22,000 Hz) and last 0.1-2.2 s [157,175]. Biphonations have been reported as well as a graded structure of burst-pulse to whistle transitions [157,175]. Rhythmic repeated call sequences are common during social behaviours [176].…”

Section: Globicephala Melas-long-finned Pilot 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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STRUCTURAL CHARACTERISTICS OF PULSED CALLS OF LONG-FINNED PILOT WHALESGLOBICEPHALA MELAS

Cited by 38 publications

References 43 publications

Variation in the emission rate of sounds in a captive group of false killer whales Pseudorca crassidens during feedings: possible food anticipatory vocal activity?

Variation in the emission rate of sounds in a captive group of false killer whales Pseudorca crassidens during feedings: possible food anticipatory vocal activity?

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

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

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