Patterns of Sound Production in Diving Sperm Whales in the Northwestern Mediterranean

Teloni, Valeria

doi:10.1111/j.1748-7692.2005.tb01243.x

Cited by 29 publications

(34 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Data from archival tags (DTags) deployed on whales in the Ligurian Sea and the Gulf of Mexico showed that an average of 32.3 creaks/hour were emitted during the bottom phase of dives, and that whales displayed dive inflections as well as pitch and roll angle variations in relation to creak emissions. Creaks were mostly produced as soon as a whale had reached its preferred depth range, where most of active foraging takes place: Teloni (2005) indicated that the first creak of a dive was heard in average 7.4 minutes after the first usual click. Miller et al (2004a) mentioned creak counts of 20.1 creaks/dive, while Watwood et al (2006) give 18.5 creaks/dive for the Mediterranean Sea and Teloni (2005) mentioned creak counts ranging from 5 to 21 per dive.…”

Section: Discussionmentioning

confidence: 99%

“…in this study, whales were recorded in areas westward from the Ligurian Sea) and/or to differences in methodology. Miller et al (2004a) and Watwood et al (2006) processed data obtained from tag deployments, while Teloni (2005) used beam forming processing from a 128-element towed array to detect whales at long range. Madsen et al (2002) indicated that creak pulses had a much lower source level (179-205 dB ref 1 mPa@1m, rms) compared to usual clicks (220-236 dB ref 1 mPa@1m, rms), therefore, creaks might not be audible in regular click sequences recorded from distant whales.…”

Section: Discussionmentioning

confidence: 99%

“…In the Mediterranean Sea, sperm whale vocalizations during foraging dives have been studied by Drouot et al (2004b): a mean of 25 creaks per dive were emitted during 17 dives lasting on average 45 minutes each, and they were produced at a higher rate by larger whales. Teloni (2005) reported creak production at lower and more variable rates with 5 to 21 creaks/dive recorded during 28 dives. Watwood et al (2006) compared dive cycles and pulse emissions in the western Mediterranean Sea, in the Gulf of Mexico and in the western Atlantic Ocean: they found an average of 18.5 creaks per dive emitted by 12 sperm whales tagged in the Ligurian Sea, a count significantly different from values obtained in the two other regions.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Foraging dives of sperm whales in the north-western Mediterranean Sea

Gannier¹,

Petiau

Dulau³

et al. 2012

J. Mar. Biol. Ass.

View full text Add to dashboard Cite

Oceanic odontocetes rely on echolocation to forage on pelagic or benthic prey, but their feeding ecology is difficult to study. We studied sperm whale foraging dives during summer in the north-western Mediterranean, using visual and passive acoustic observations. Clicking and creaking activities were recorded during dives of focal whales, at distances ,3000 m using a towed hydrophone and DAT recorder. A total of 52 sperm whales were recorded over at least one full dive cycle. Data were obtained for 156 complete dives in total, including sequences of up to nine consecutive dives. Various dive and environmental variables were entered in multiple linear regression and principal components analysis, as well as estimated mass of whales. Creak rate was 0.80 creak/minute on average, with moderate variance. Bigger whales tended to dive longer at greater depths (as suggested by ascent durations), and emitted more creaks during a dive: 20.2 creaks/dive on average for individuals ,24 tons, compared to 25.6 creaks/dive for animals .24 tons of estimated mass. For individual whales, creak rates did not vary significantly with size (range 0.78 -0.80 creak/minute), but decreased with time of the day, and increased for shorter foraging phases. For different dives, higher creak rates were also observed earlier in the day, and linked to shorter foraging phases and surface durations. Although the exact significance of creak emissions (i.e. foraging attempt or prey capture) is not precisely determined, creak rates may be reliably used to quantify sperm whale foraging when single animal dives can be followed acoustically.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Foraging dives of sperm whales in the north-western Mediterranean Sea

Gannier¹,

Petiau

Dulau³

et al. 2012

J. Mar. Biol. Ass.

View full text Add to dashboard Cite

show abstract

“…The acoustical sampling used a towed hydrophone and consisted of listening for 1 min every 2 nm (3.7 km) along the cruise track. Sperm whales were recognized by their typical signal composed of regular clicks (Teloni, 2005). For pilot whales and Risso's dolphins, only visual detections were used.…”

Section: Data Collection and Standardisationmentioning

confidence: 99%

Ecological niches of three teuthophageous odontocetes in the northwestern Mediterranean Sea

Praca

Gannier²

2008

Ocean Sci.

View full text Add to dashboard Cite

Abstract. In the northwestern Mediterranean Sea, sperm whales, pilot whales and Risso's dolphins prey exclusively or preferentially on cephalopods. In order to evaluate their competition, we modelled their habitat suitability with the Ecological Niche Factor Analysis (ENFA) and compared their ecological niches using a discriminant analysis. We used a long term (1995)(1996)(1997)(1998)(1999)(2000)(2001)(2002)(2003)(2004)(2005) small boat data set, with visual and acoustic (sperm whale) detections. Risso's dolphin had the shallowest and the more spatially restricted principal habitat, mainly located on the upper part of the continental slope (640 m mean depth). With a wider principal habitat, at 1750 m depth in average, the sperm whale used a deeper part of the slope as well as the closest offshore waters. Finally, the pilot whale has the most oceanic habitat (2500 m mean depth) mainly located in the central Ligurian Sea and Provençal basin. Therefore, potential competition for food between these species may be reduced by the differentiation of their habitats.

show abstract

“…Consequently, coherent array gain of densely sampled hydrophone array systems has not been previously exploited for range localization of sperm whales. In Teloni (2005), a 128-element horizontal coherent hydrophone array system of the NATO Undersea Research Center (NURC) with an array aperture length of 11.6 m was employed to determine sperm whale vocalization bearings and to separate whale clicks from different azimuthal directions, but no range estimates or range analysis were provided. In Zimmer et al (2004), click data from a single sperm whale acquired using the same NURC receiver array were used to determine the bearings of the whale individual.…”

Section: Introductionmentioning

confidence: 99%

Using a coherent hydrophone array for observing sperm whale range, classification, and shallow-water dive profiles

Tran

Huang

Bohn

et al. 2014

The Journal of the Acoustical Society of America

View full text Add to dashboard Cite

Sperm whales in the New England continental shelf and slope were passively localized, in both range and bearing, and classified using a single low-frequency (<2500 Hz), densely sampled, towed horizontal coherent hydrophone array system. Whale bearings were estimated using time-domain beamforming that provided high coherent array gain in sperm whale click signal-to-noise ratio. Whale ranges from the receiver array center were estimated using the moving array triangulation technique from a sequence of whale bearing measurements. Multiple concurrently vocalizing sperm whales, in the far-field of the horizontal receiver array, were distinguished and classified based on their horizontal spatial locations and the inter-pulse intervals of their vocalized click signals. The dive profile was estimated for a sperm whale in the shallow waters of the Gulf of Maine with 160 m water-column depth located close to the array's near-field where depth estimation was feasible by employing time difference of arrival of the direct and multiply reflected click signals received on the horizontal array. By accounting for transmission loss modeled using an ocean waveguide-acoustic propagation model, the sperm whale detection range was found to exceed 60 km in low to moderate sea state conditions after coherent array processing.

show abstract

Patterns of Sound Production in Diving Sperm Whales in the Northwestern Mediterranean

Cited by 29 publications

References 28 publications

Foraging dives of sperm whales in the north-western Mediterranean Sea

Foraging dives of sperm whales in the north-western Mediterranean Sea

Ecological niches of three teuthophageous odontocetes in the northwestern Mediterranean Sea

Using a coherent hydrophone array for observing sperm whale range, classification, and shallow-water dive profiles

Contact Info

Product

Resources

About