scholarly journals Asymmetries in the individual distinctiveness and maternal recognition of infant contact calls and distress screams in baboons

2009 ◽  
Vol 125 (3) ◽  
pp. 1792-1805 ◽  
Author(s):  
Drew Rendall ◽  
Hugh Notman ◽  
Michael J. Owren
Keyword(s):  
Contact Calls ◽  
Individual Distinctiveness ◽  
The Individual

The imitation dilemma: can parrots maintain their vocal individuality when imitating conspecifics?

Behaviour ◽  
2019 ◽  
Vol 156 (5-8) ◽  
pp. 787-814 ◽  
Author(s):  
Heidi M. Thomsen ◽  
Thorsten J.S. Balsby ◽  
Torben Dabelsteen
Keyword(s):  
Social Systems ◽  
Social Contexts ◽  
Acoustic Parameters ◽  
Strong Basis ◽  
Vocal Individuality ◽  
Individual Fitness ◽  
Vocal Imitation ◽  
Contact Calls ◽  
Individual Distinctiveness ◽  
The Individual

Abstract Many species of parrots live in fission–fusion social systems, characterised by frequent changes in flock composition. In these systems, the ability to selectively choose flock members is essential in order to maximise individual fitness. As a result, most species of parrots have individual distinctive contact calls that mediate the formation of groups during fission and fusion events. However, in vocal interactions during fission and fusion events, individuals will modify the fine-scale structure of their contact calls in a manner that sometimes will result in imitation of the contact calls of another individual, potentially altering or weakening the individual distinctiveness of contact calls. This presents parrots with an interesting dilemma. Here we present a study investigating the effect of vocal modification during interactions, including vocal imitation, on the individual distinctiveness and sex-specific differences of contact calls from ten captive bred peach-fronted conures (Eupsittula aurea). In order to determine if vocal individual- and sex distinctiveness persists in contact calls that are modified to that of another individual, we compared nine acoustic parameters from spontaneous (baseline) contact calls and contact calls emitted as response to a playback stimulus. Although modified, all acoustic parameters remained individually distinctive when the focal individuals interacted with the playback stimulus. These results provide a strong basis for discriminating between calls from different individuals across several social contexts, which could play an important role in mediating selective associations between individual peach-fronted conures during fission and fusion events.

INTRA- AND INTERINDIVIDUAL VARIATION IN THE CONTACT CALLS OF SPECTACLED PARROTLETS (FORPUS CONSPICILLATUS)

Behaviour ◽  
2001 ◽  
Vol 138 (6) ◽  
pp. 709-726 ◽  
Author(s):  
Judith Fischer ◽  
Ralf Wanker
Keyword(s):  
Social Relationships ◽  
Function Analysis ◽  
Individual Recognition ◽  
Peak Frequency ◽  
Social Classes ◽  
Interindividual Variation ◽  
Social Categories ◽  
Acoustical Parameters ◽  
Contact Calls ◽  
The Individual

AbstractThe ability to discriminate individuals or different social classes of individuals is important for the evolution of social behaviour. In animal societies with ample social relationships selection will often favour the capacity to signal and perceive the identity and the membership to a certain social class. Spectacled parrotlets (Forpus conspicillatus, Psittacidae, Psittaciformes) live in a complex system of social relationships throughout their lives and are able to recognize their mates and their siblings on the basis of their contact calls. Here we attempt to identify the acoustic parameters that might be used in individual recognition and recognition of social categories. Therefore we analysed recordings of contact calls with reference to the variation of certain acoustical parameters. There was significant interindividual variation in the peak frequency, maximum frequency, duration, energy, bandwidth and minimum frequency in the contact calls of spectacled parrotlets. Discriminant function analysis has shown individual and social subunit specific calls but also that individuals of different social classes share some calls. From our results we hypothesize that spectacled parrotlets could use at least six acoustical cues in their contact calls that might encode information about the individual, the age class, the pair, the pairing status and the family.

The Basis for Individual Recognition By Voice in the Sandwich Tern (Sterna Sandvicensis)

Behaviour ◽  
1968 ◽  
Vol 32 (1-3) ◽  
pp. 150-157 ◽  
Author(s):  
R.E. Hutchison ◽  
W.H. Thorpe ◽  
J.G. Stevenson
Keyword(s):  
Individual Recognition ◽  
Mutual Recognition ◽  
Effective Means ◽  
Bird Species ◽  
Individual Characteristics ◽  
Good Opportunity ◽  
Individual Distinctiveness ◽  
Sandwich Tern ◽  
Sterna Sandvicensis ◽  
The Individual

Abstract1. There is a considerable amount of observational evidence to show that in a number of bird species, especially colony-nesting sea birds, a bird's recognition of its mate and the mutual recognition of parent and young may, in certain circumstances, be based upon individual peculiarities of voice. However, with the exception of a preliminary account of the matter in the Guillemot, (Uria aalge), there is no analytical evidence to support these conclusions. 2. The Sandwich Tern (Sterna sandvicensis) provides good opportunity for study of one aspect of this problem, namely the individual distinctiveness of the 'fish-call' of the returning parent bird. Different individuals were recorded and the results analysed by sound spectrograph. 3. The fish-call is shown to be composed of three segments of sound; each segment displaying individual characteristics of duration, fine structure, pitch etc. The overall relations between them, the "patterning" of the call, is also shown to be characteristic. 4. The extent to which these separate individual characteristics are recognised as distinctive by birds themselves has not been investigated but it is clear that if the fish-call is to be used as an effective means of individual recognition in a large colony the patterning of the call (in the sense of the 'gestalt' or the overall relationship of the component parts) must play a major role.

scholarly journals Frequency-modulated second elements of two-element alarm calls do not enhance discrimination of callers in three Eurasian ground squirrels

2012 ◽  
Vol 58 (5) ◽  
pp. 749-757 ◽  
Author(s):  
Irena Schneiderová
Keyword(s):  
Function Analysis ◽  
Basic Structure ◽  
Ground Squirrels ◽  
Alarm Calls ◽  
Acoustic Parameters ◽  
Other Information ◽  
Limited Frequency ◽  
Spermophilus Citellus ◽  
Individual Distinctiveness ◽  
The Individual

Abstract Alarm calls of the European Spermophilus citellus (EGS), Taurus S. taurensis (TGS) and Anatolian S. xanthoprymnus (AGS) ground squirrels share the same basic structure. They are tonal sounds consisting primarily of two different elements. The first element, often produced without the second element, has limited frequency modulation, while the second element is more frequency modulated. The present study examined whether this frequency-modulated element enhances the individual distinc-tiveness of calls, allowing calls to be ascribed with greater confidence to individual callers of the three species. Cross-validated discriminant function analysis (DFA) based on five acoustic parameters of the first element successfully classified calls to correct individuals (EGS: 90%, TGS: 98%, AGS: 96%). Cross-validated DFA based on five acoustic parameters of the second element was also successful in classifications (EGS: 88%, TGS: 86%, AGS: 96%), though discrimination of callers based on parameters of the second versus first element was the same for the AGS, lower for the EGS and significantly lower for the TGS. Cross-validated DFA based on five acoustic parameters of two-element calls also successfully classified calls to correct individuals (EGS: 93%, TGS: 98%, AGS: 97%), though did not improve the extent to which calls could be classified to individuals beyond that based on the first element alone. Thus, the second element does not enhance the individual distinctiveness of calls, but may convey other information such as the location of the caller.

scholarly journals Vocal individuality of Holstein-Friesian cattle is maintained across putatively positive and negative farming contexts

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Alexandra Green ◽  
Cameron Clark ◽  
Livio Favaro ◽  
Sabrina Lomax ◽  
David Reby
Keyword(s):  
High Frequency ◽  
Training Set ◽  
Vocal Individuality ◽  
Negative Valence ◽  
Holstein Friesian ◽  
Contact Calls ◽  
The Cross ◽  
Positive And Negative Valence ◽  
Individual Distinctiveness ◽  
Friesian Cattle

AbstractCattle mother-offspring contact calls encode individual-identity information; however, it is unknown whether cattle are able to maintain individuality when vocalising to familiar conspecifics over other positively and negatively valenced farming contexts. Accordingly, we recorded 333 high-frequency vocalisations from 13 Holstein-Friesian heifers during oestrus and anticipation of feed (putatively positive), as well as denied feed access and upon both physical and physical & visual isolation from conspecifics (putatively negative). We measured 21 source-related and nonlinear vocal parameters and stepwise discriminant function analyses (DFA) were performed. Calls were divided into positive (n = 170) and negative valence (n = 163) with each valence acting as a ‘training set’ to classify calls in the oppositely valenced ‘test set’. Furthermore, MANOVAs were conducted to determine which vocal parameters were implicated in individual distinctiveness. Within the putatively positive ‘training set’, the cross-validated DFA correctly classified 68.2% of the putatively positive calls and 52.1% of the putatively negative calls to the correct individual, respectively. Within the putatively negative ‘training set’, the cross-validated DFA correctly assigned 60.1% of putatively negative calls and 49.4% of putatively positive calls to the correct individual, respectively. All DFAs exceeded chance expectations indicating that vocal individuality of high-frequency calls is maintained across putatively positive and negative valence, with all vocal parameters except subharmonics responsible for this individual distinctiveness. This study shows that cattle vocal individuality of high-frequency calls is stable across different emotionally loaded farming contexts. Individual distinctiveness is likely to attract social support from conspecifics, and knowledge of these individuality cues could assist farmers in detecting individual cattle for welfare or production purposes.

scholarly journals Evidence of stereotyped contact call use in narwhal (Monodon monoceros) mother-calf communication

PLoS ONE ◽  
2021 ◽  
Vol 16 (8) ◽  
pp. e0254393
Author(s):  
Audra E. Ames ◽  
Susanna B. Blackwell ◽  
Outi M. Tervo ◽  
Mads Peter Heide-Jørgensen
Keyword(s):  
High Arctic ◽  
Preliminary Evidence ◽  
Acoustic Behavior ◽  
Contact Call ◽  
Call Production ◽  
Monodon Monoceros ◽  
Contact Calls ◽  
Individual Distinctiveness ◽  
Additional Support ◽  
And Function

Narwhals (Monodon monoceros) are gregarious toothed whales that strictly reside in the high Arctic. They produce a broad range of signal types; however, studies of narwhal vocalizations have been mostly descriptive of the sounds available in the species’ overall repertoire. Little is known regarding the functions of highly stereotyped mixed calls (i.e., biphonations with both sound elements produced simultaneously), although preliminary evidence has suggested that such vocalizations are individually distinctive and function as contact calls. Here we provide evidence that supports this notion in narwhal mother-calf communication. A female narwhal was tagged as part of larger studies on the life history and acoustic behavior of narwhals. At the time of tagging, it became apparent that the female had a calf, which remained close by during the tagging event. We found that the narwhal mother produced a distinct, highly stereotyped mixed call when separated from her calf and immediately after release from capture, which we interpret as preliminary evidence for contact call use between the mother and her calf. The mother’s mixed call production occurred continually over the 4.2 day recording period in addition to a second prominent but different stereotyped mixed call which we believe belonged to the narwhal calf. Thus, narwhal mothers produce highly stereotyped contact calls when separated from their calves, and it appears that narwhal calves similarly produce distinct, stereotyped mixed calls which we hypothesize also contribute to maintaining mother-calf contact. We compared this behavior to the acoustic behavior of two other adult females without calves, but also each with a unique, stereotyped call type. While we provide additional support for individual distinctiveness across narwhal contact calls, more research is necessary to determine whether these calls are vocal signatures which broadcast identity.

A method for rating the individual distinctiveness of domestic cats

1986 ◽  
Vol 34 (4) ◽  
pp. 1016-1025 ◽  
Author(s):  
Julie Feaver ◽  
Michael Mendl ◽  
Patrick Bateson
Keyword(s):  
Domestic Cats ◽  
Individual Distinctiveness ◽  
The Individual

The Ultrastructure of Monkey Gingival Epithelium

1967 ◽  
Vol 25 ◽  
pp. 16-17
Author(s):  
C.N. Sun
Keyword(s):  
Epithelial Cells ◽  
Macaca Nemestrina ◽  
Stratum Granulosum ◽  
Solution Ph ◽  
Gingival Epithelial Cells ◽  
Stratum Spinosum ◽  
Cell Layers ◽  
Gingival Epithelium ◽  
The Individual ◽  
Different Thickness

The present study demonstrates the ultrastructure of the gingival epithelium of the pig tail monkey (Macaca nemestrina). Specimens were taken from lingual and facial gingival surfaces and fixed in Dalton's chrome osmium solution (pH 7.6) for 1 hr, dehydrated, and then embedded in Epon 812.Tonofibrils are variable in number and structure according to the different region or location of the gingival epithelial cells, the main orientation of which is parallel to the long axis of the cells. The cytoplasm of the basal epithelial cells contains a great number of tonofilaments and numerous mitochondria. The basement membrane is 300 to 400 A thick. In the cells of stratum spinosum, the tonofibrils are densely packed and increased in number (fig. 1 and 3). They seem to take on a somewhat concentric arrangement around the nucleus. The filaments may occur scattered as thin fibrils in the cytoplasm or they may be arranged in bundles of different thickness. The filaments have a diameter about 50 A. In the stratum granulosum, the cells gradually become flatted, the tonofibrils are usually thin, and the individual tonofilaments are clearly distinguishable (fig. 2). The mitochondria and endoplasmic reticulum are seldom seen in these superficial cell layers.

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