Identification of potential signature whistles from free-ranging common dolphins (Delphinus delphis) in South Africa

  title={Identification of potential signature whistles from free-ranging common dolphins (Delphinus delphis) in South Africa},
  author={J. Fearey and Simon H. Elwen and Bridget S. James and Tess Gridley},
  journal={Animal Cognition},
Conveying identity is important for social animals to maintain individually based relationships. Communication of identity information relies on both signal encoding and perception. Several delphinid species use individually distinctive signature whistles to transmit identity information, best described for the common bottlenose dolphin (Tursiops truncatus). In this study, we investigate signature whistle use in wild common dolphins (Delphinus delphis). Acoustic recordings were analysed from 11… Expand
Repeated downsweep vocalizations of the Araguaian river dolphin, Inia araguaiaensis.
This study documents the first evidence for repetitive sequences of downsweep whistles in botos that appear to be shared between individuals, and the context of their occurrence is investigated. Expand
Temporal and spatial distributions of delphinid species in Massachusetts Bay (USA) using passive acoustics from ocean gliders
Knowledge about marine mammal habitat use is necessary for informing ecosystem-based management and mitigating human impacts. Massachusetts Bay is an important marine mammal foraging area in the GulfExpand
Photographic Capture-Recapture Analysis Reveals a Large Population of Indo-Pacific Bottlenose Dolphins (Tursiops aduncus) With Low Site Fidelity off the North West Cape, Western Australia
Little is known about the ecology of Indo-Pacific bottlenose dolphins (Tursiops aduncus) inhabiting the coastal waters of tropical north-western Australia. We used photo-identification data collectedExpand
First description of whistles of Black Sea short-beaked common dolphins, Delphinus delphis ponticus
The study presents the first quantitative description of whistles (N = 1,017) recorded from free-range short-beaked common dolphins D. delphis ponticus, an endemic subspecies from the Black Sea. Th...


Identification and Characteristics of Signature Whistles in Wild Bottlenose Dolphins (Tursiops truncatus) from Namibia
This is the first study describing signature whistles in a wild free-ranging T. truncatus population inhabiting African waters and it provides a baseline on which more in depth behavioural studies can be based. Expand
Identifying signature whistles from recordings of groups of unrestrained bottlenose dolphins (Tursiops truncatus)
A novel method is presented, SIGnature IDentification (SIGID), that can identify signature whistles in recordings of groups of dolphins recorded via a single hydrophone and will facilitate the study of signature whistle use in the wild, signature whistle diversity between different populations, and potentially allow signatures whistles to be used in mark-recapture studies. Expand
Whistle characteristics of common dolphins (Delphinus sp.) in the Hauraki Gulf, New Zealand
Comparsions with previously studied populations reveal marked differences in the whistle frequency and modulation of the New Zealand population, suggesting behaviour and the local environment likely play a role in shaping the vocal repertoire of this species. Expand
Signature whistles in free‐ranging populations of Indo‐Pacific bottlenose dolphins, Tursiops aduncus
This work investigates whether Indo-Pacific bottlenose dolphins (T. aduncus) use signature whistles and identifies whistle types of similar shape that are commonly used by T.aduncus and are likely to reflect identity information encoded in frequency modulation patterns. Expand
Signature–whistle production in undisturbed free–ranging bottlenose dolphins (Tursiops truncatus)
Data from behavioural observations and acoustic recordings of free–ranging bottlenose dolphins (Tursiops truncatus) were analysed to determine whether signature whistles are produced by wildExpand
Facts about signature whistles of bottlenose dolphins, Tursiops truncatus
Twenty whistles were randomly selected from each of 20 bottlenose dolphins from recordings made during brief capture–release events in Sarasota Bay, FL, U.S.A., and 10 judges were asked to visually group spectrograms based on similarity of their contours, and judges consistently grouped whistles according to the identity of the vocalizer. Expand
Communication in bottlenose dolphins: 50 years of signature whistle research
The history of signature whistle research is reviewed, covering definitions, acoustic features, information content, contextual use, developmental aspects, and species comparisons with mammals and birds. Expand
Signature whistles in wild bottlenose dolphins: long-term stability and emission rates
The decades-long occurrence of whistles with stereotyped frequency contours in a population of wild bottlenose dolphins, resident in the region of the Sado estuary, Portugal, is documented, and confirmed stereotypy throughout more than 20 years suggests that the identified stereotyped whistles are in fact signature whistles. Expand
Variation in the whistle characteristics of short-beaked common dolphins, Delphinus delphis, at two locations around the British Isles
The whistle repertoire of short-beaked common dolphins recorded in the Celtic Sea was compared to that of D. delphis from the Western Approaches of the English Channel, and most whistle parameters were significantly different: almost all frequency variables measured were significantly higher in English Channel whistles. Expand
Bottlenose dolphins exchange signature whistles when meeting at sea
  • N. Quick, V. Janik
  • Biology, Medicine
  • Proceedings of the Royal Society B: Biological Sciences
  • 2012
The data show that signature whistle exchanges are a significant part of a greeting sequence that allows dolphins to identify conspecifics when encountering them in the wild. Expand