Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 29 for “"whistles"”.
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A stochastic measure of similarity between dolphin signature whistles
Bottlenose dolprlin (Tursiops trunratus) whistles are currently studied by subjective visual comparison of whistle spectrograms. This thesis describes the novel use of stochastic modeling to automate the comparison of dolphin whistles and to yield an objective, quantitative measure of whistle …
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Generic compression and recall of signals with application to dolphin whistles
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1993.
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Development and functions of signature whistles of free-ranging bottlenose dolphins, Tursiops truncatus
… functions of individually distinctive signature whistles of free-ranging bottlenose dolphins, Tursiops tnmcatus. Research was conducted at a study site near Sarasota, Florida, where a resident community of bottlenose dolphins have been the focus of a long-term, ongoing study. Through observations …
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Development and functions of signature whistles of free-ranging bottlenose dolphins, Tursiops truncatus
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Biology, 1992.
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Whistle use and whistle sharing by allied male bottlenose dolphins, Tursiops truncatus
… these alliances on vocal development. Comparing whistles produced in isolation revealed that alliance partners have similar whistles, while non-partners do not. Whistle similarity seen in alliance partners mirrors group-specific vocal convergence in stable groups of birds and bats. Males produce …
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Whistles of Sympatric Species of Bottlenose Dolphins (Tursiops truncatus) and Spotted Dolphins (Stenella frontalis) in the Bahamas: Acoustic Characteristics and Contextual Use
… socio-sexual, and aggressive encounters, and whistles are thought to play a key role in their communication. Concurrent vocal and behavioral recordings of wild sympatric species of Atlantic spotted dolphins (Stenella frontalis) and Atlantic bottlenose dolphins (Tursiops truncatus) were …
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The Ontogeny of Whistle Production in Infant Atlantic Bottlenose Dolphins (<i>Tursiops truncatus</i>) During the First Thirty Days of Life
… our understanding of the early emergence of whistles and whistle-like vocalizations. The acoustic parameters of whistle-type vocalizations (i.e., whistles and whistlesquawks) that coincided with a bubblestream emission from the focal calf and/or its mother were analyzed, as were the …
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Investigating the potential for individually distinctive signature whistles to be used in mark-recapture of common bottlenose dolphins (Tursiops truncatus)
… of using individually distinctive signature whistles of bottlenose dolphins, Tursiops truncatus. Acoustic and photo identification data were collected simultaneously from a small population of common bottlenose dolphins in Walvis Bay, Namibia, between 2009 and 2015. Visual classification and …
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Modeling and frequency tracking of marine mammal whistle calls
… needed in order to synthesize natural-sounding whistles with embedded information. Since the whistle calls are composed of frequency modulated harmonic tones, they are best modeled as a weighted superposition of harmonically related sinusoids. Previous research with bottlenose dolphin whistle …
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Modeling and frequency tracking of marine mammal whistle calls
… needed in order to synthesize natural-sounding whistles with embedded information. Since the whistle calls are composed of frequency modulated harmonic tones, they are best modeled as a weighted superposition of harmonically related sinusoids. Previous research with bottlenose dolphin whistle …
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Who Said That? Towards a Machine-Prediction-Based Approach to Tursiops Truncatus Whistle Localization and Attribution in a Reverberant Dolphinarium
… research – research has fixated on "signature whistles," individually distinctive whistles that seem to convey an individual's identity to conspecifics, can be mimicked, and can be modulated under certain circumstances in ways that may or may not be communicative. Apart from signature whistles, …
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Techniques for studying vocal learning in bottlenose dolphins, Tursiops truncatus
… evidence has indicated that the signature whistles of dolphin calves are modeled on the whistles in the calves' early environments and that the calves' social interactions influence the choice of model. The methods currently used to study the acoustic and social behavior of dolphins are …
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The choreography of belonging : toothed whale spatial cohesion and acoustic communication
… animals. Looking more specifically at signature whistles, a type of call often linked to cohesion, I found that when one animal produced its own signature whistle, its partner was more likely to respond with its own whistle. To better evaluate potential cohesion functions for signature whistles, …
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The choreography of belonging : toothed whale spatial cohesion and acoustic communication
… animals. Looking more specifically at signature whistles, a type of call often linked to cohesion, I found that when one animal produced its own signature whistle, its partner was more likely to respond with its own whistle. To better evaluate potential cohesion functions for signature whistles, …
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Pre- and Post-Partum Whistle Production of a Bottlenose Dolphin (<i>Tursiops truncatus</i>) Mother-Calf Dyad
… calf development, and how exposure to these whistles may affect the calf’s vocal repertoire. Findings showed that the mother increased her rates both pre- and post-delivery, while other group members produced their whistles at decreased rates until the calf’s second week of life. After the …
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Investigation of population abundance, distribution, and population linkage of Indo-Pacific Bottlenose Dolphins (Tursiops aduncus) on the north and south of Zanzibar using mark-recapture and acoustic methods
… fin images, and acoustic data from dolphin whistles, both collected in 2008, were analysed to examine linkages between north and south Zanzibar. Photographic identification data was applied in a Mark-Recapture framework, using open population models, to generate abundance estimates of 149 …
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Vocal Response of Bottlenose Dolphins (<i>Tursiops truncatus</i>) to a Novel Stimulus
… surface. Rates of two distinct vocal types (whistles and burst pulses) were calculated for each trial. Vocal rates were greater on the last (non-novel) trials versus novel trials—a pattern of sensitization to the novel stimulus. Vocal rates and the degree of sensitization were greater on …
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Examining Individual Identity in Beluga Whale (Delphinapterus leucas) Acoustic Repertoires as a Function of Call Type
… patterns, while biphonated r-shaped whistles trended toward significance. Simple contact calls and flat whistles did not show habituation but did show significant discrimination when caller identity changed. These results indicate that belugas do not just encode identity in a single …
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Passive Acoustics: A Multifaceted Tool for Marine Mammal Conservation
… was examined using recorded noise and dolphin whistles. I found that bottlenose dolphins are able to compensate for increased noise in their environment using a wide range of strategies employed in a singular fashion or in various combinations, depending on the frequency content of the noise, …
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Just world violations prompt beliefs in karmic retribution
… varied in its level of severity (e.g., a man whistles suggestively at a woman vs. a man takes an up-skirt photo of a woman). People who read about more severe crimes thought that a negative event would be more likely to happen to the offender of the crime. Importantly, people thought negative …
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