scholarly journals Linking social complexity and vocal complexity: a parid perspective

2012 ◽  
Vol 367 (1597) ◽  
pp. 1879-1891 ◽  
Author(s):  
Indrikis Krams ◽  
Tatjana Krama ◽  
Todd M. Freeberg ◽  
Cecilia Kullberg ◽  
Jeffrey R. Lucas
Keyword(s):  
Social Complexity ◽  
Vocal Communication ◽  
Review Literature ◽  
Physiological Factors ◽  
Poecile Carolinensis ◽  
The Social ◽  
Complexity Hypothesis ◽  
The Relationship ◽  
Benefits And Costs ◽  
Vocal Complexity

The Paridae family (chickadees, tits and titmice) is an interesting avian group in that species vary in important aspects of their social structure and many species have large and complex vocal repertoires. For this reason, parids represent an important set of species for testing the social complexity hypothesis for vocal communication—the notion that as groups increase in social complexity, there is a need for increased vocal complexity. Here, we describe the hypothesis and some of the early evidence that supported the hypothesis. Next, we review literature on social complexity and on vocal complexity in parids, and describe some of the studies that have made explicit tests of the social complexity hypothesis in one parid—Carolina chickadees, Poecile carolinensis . We conclude with a discussion, primarily from a parid perspective, of the benefits and costs of grouping and of physiological factors that might mediate the relationship between social complexity and changes in signalling behaviour.

scholarly journals Does Social Complexity Drive Vocal Complexity? Insights from the Two African Elephant Species

Animals ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 3071
Author(s):  
Daniela Hedwig ◽  
Joyce Poole ◽  
Petter Granli
Keyword(s):  
Communication Systems ◽  
Social Complexity ◽  
Vocal Communication ◽  
Reproductive Rate ◽  
African Elephant ◽  
African Elephants ◽  
Savanna Elephant ◽  
The Social ◽  
Forest Elephant ◽  
Vocal Complexity

The social complexity hypothesis (SCH) for communication states that the range and frequency of social interactions drive the evolution of complex communication systems. Surprisingly, few studies have empirically tested the SHC for vocal communication systems. Filling this gap is important because a co-evolutionary runaway process between social and vocal complexity may have shaped the most intricate communication system, human language. We here propose the African elephant Loxodonta spec. as an excellent study system to investigate the relationships between social and vocal complexity. We review how the distinct differences in social complexity between the two species of African elephants, the forest elephant L. cyclotis and the savanna elephant L. africana, relate to repertoire size and structure, as well as complex communication skills in the two species, such as call combination or intentional formant modulation including the trunk. Our findings suggest that Loxodonta may contradict the SCH, as well as other factors put forth to explain patterns of vocal complexity across species. We propose that life history traits, a factor that has gained little attention as a driver of vocal complexity, and the extensive parental care associated with a uniquely low and slow reproductive rate, may have led to the emergence of pronounced vocal complexity in the forest elephant despite their less complex social system compared to the savanna elephant. Conclusions must be drawn cautiously, however. A better understanding of vocal complexity in the genus Loxodonta will depend on continuing advancements in remote data collection technologies to overcome the challenges of observing forest elephants in their dense rainforest habitat, as well as the availability of directly comparable data and methods, quantifying both structural and contextual variability in the production of rumbles and other vocalizations in both species of African elephants.

scholarly journals Tolerant and intolerant macaques show different levels of structural complexity in their vocal communication

2020 ◽  
Vol 287 (1928) ◽  
pp. 20200439
Author(s):  
Nancy Rebout ◽  
Arianna De Marco ◽  
Jean-Christophe Lone ◽  
Andrea Sanna ◽  
Roberto Cozzolino ◽  
...  
Keyword(s):  
Communication Systems ◽  
Social Complexity ◽  
Vocal Communication ◽  
Rhesus Macaques ◽  
Structural Complexity ◽  
Social Environments ◽  
Social Tolerance ◽  
The Social ◽  
Vocal Signals ◽  
Complexity Hypothesis

We tested the social complexity hypothesis which posits that animals living in complex social environments should use complex communication systems. We focused on two components of vocal complexity: diversity (number of categories of calls) and flexibility (degree of gradation between categories of calls). We compared the acoustic structure of vocal signals in groups of macaques belonging to four species with varying levels of uncertainty (i.e. complexity) in social tolerance (the higher the degree of tolerance, the higher the degree of uncertainty): two intolerant species, Japanese and rhesus macaques, and two tolerant species, Tonkean and crested macaques. We recorded the vocalizations emitted by adult females in affiliative, agonistic and neutral contexts. We analysed several acoustic variables: call duration, entropy, time and frequency energy quantiles. The results showed that tolerant macaques displayed higher levels of vocal diversity and flexibility than intolerant macaques in situations with a greater number of options and consequences, i.e. in agonistic and affiliative contexts. We found no significant differences between tolerant and intolerant macaques in the neutral context where individuals are not directly involved in social interaction. This shows that species experiencing more uncertain social interactions displayed greater vocal diversity and flexibility, which supports the social complexity hypothesis.

Licence to operate

2016 ◽  
Vol 12 (3) ◽  
pp. 387-408 ◽  
Author(s):  
Juha Klemelä
Keyword(s):  
Critical Discourse Analysis ◽  
Social Impact ◽  
Qualitative Content Analysis ◽  
Full Spectrum ◽  
Content Type ◽  
The Social ◽  
The Status ◽  
Licence To Operate ◽  
The Relationship ◽  
Benefits And Costs

Purpose The Social Return on Investment (SROI) framework has been developed for mapping and measuring social impact. It may be used for legitimating organisations and projects. The framework is often criticised for its overemphasis of the SROI ratio, i.e. the relationship between monetised benefits and costs. This study aims to demonstrate how the SROI method legitimates organisations or projects with multiple other discursive ways besides the SROI ratio. It also discusses the status of these other ways of legitimation in relation to the quantifying and monetising core tendency of SROI. Design/methodology/approach The empirical data consist of an SROI guidebook and 12 SROI reports. Their study applies Theo van Leeuwen’s ideas for analysing the discursive legitimation of social practices. The study takes place broadly in the framework of Norman Fairclough’s critical discourse analysis, aided by qualitative content analysis. Findings In the analysis, the full spectrum of the van Leeuwenian legitimation means used by SROI – authorisation, rationalisation, moral evaluation and mythopoetical narration – is brought out in the data and the status and social context of the legitimation means are assessed and discussed. It is shown that there is existing potential for broader and more visible use of different legitimation means. Practical implications Based on the findings of the study, suggestions for the improvement of SROI reporting by a more balanced explicit use of the multitude of legitimation means are presented. Originality/value The study is original both in its subject (the spectrum of legitimation in SROI) and its method (qualitative discursive and contentual analysis of SROI as a legitimating discourse).

Social Networks and Social Complexity in Female-bonded Primates

2010 ◽  
Author(s):  
Julia Lehmann ◽  
Katherine Andrews ◽  
Robin Dunbar
Keyword(s):  
Social Network ◽  
Social Relationships ◽  
Social Complexity ◽  
Social Bonds ◽  
Primate Brain ◽  
The Social ◽  
Group Members ◽  
Primate Group ◽  
Network Metrics ◽  
The Relationship

Most primates are intensely social and spend a large amount of time servicing social relationships. The social brain hypothesis suggests that the evolution of the primate brain has been driven by the necessity of dealing with increased social complexity. This chapter uses social network analysis to analyse the relationship between primate group size, neocortex ratio and several social network metrics. Findings suggest that social complexity may derive from managing indirect social relationships, i.e. relationships in which a female is not directly involved, which may pose high cognitive demands on primates. The discussion notes that a large neocortex allows individuals to form intense social bonds with some group members while at the same time enabling them to manage and monitor less intense indirect relationships without frequent direct involvement with each individual of the social group.

scholarly journals Social complexity as a proximate and ultimate factor in communicative complexity

2012 ◽  
Vol 367 (1597) ◽  
pp. 1785-1801 ◽  
Author(s):  
Todd M. Freeberg ◽  
Robin I. M. Dunbar ◽  
Terry J. Ord
Keyword(s):  
Social Complexity ◽  
Social Systems ◽  
Causal Factor ◽  
Human Language ◽  
The Social ◽  
Alternative Hypotheses ◽  
Group Members ◽  
Complexity Hypothesis ◽  
Complex Social Systems ◽  
Over Time

The ‘social complexity hypothesis’ for communication posits that groups with complex social systems require more complex communicative systems to regulate interactions and relations among group members. Complex social systems, compared with simple social systems, are those in which individuals frequently interact in many different contexts with many different individuals, and often repeatedly interact with many of the same individuals in networks over time. Complex communicative systems, compared with simple communicative systems, are those that contain a large number of structurally and functionally distinct elements or possess a high amount of bits of information. Here, we describe some of the historical arguments that led to the social complexity hypothesis, and review evidence in support of the hypothesis. We discuss social complexity as a driver of communication and possible causal factor in human language origins. Finally, we discuss some of the key current limitations to the social complexity hypothesis—the lack of tests against alternative hypotheses for communicative complexity and evidence corroborating the hypothesis from modalities other than the vocal signalling channel.

scholarly journals Structural and functional complexity of vocalizations in a cooperatively breeding passerine, Jungle Babbler

2020 ◽  
Author(s):  
Soniya Devi Yambem ◽  
Sonam Chorol ◽  
Manjari Jain
Keyword(s):  
Social Complexity ◽  
Size Structure ◽  
Structure And Function ◽  
Repertoire Size ◽  
Call Structure ◽  
The Social ◽  
Cooperatively Breeding ◽  
Complexity Hypothesis ◽  
And Function ◽  
Functionally Diverse

AbstractAnimal vocal communication ranges from simple to complex based on repertoire size, structure, and composition of calls and the information encoded in them. According to the social complexity hypothesis, communication complexity tends to increase with an increase in social complexity. While several studies on mammalian systems exist supporting this, evidence from avian systems is comparatively limited. Towards this, we present evidence for complex acoustic communication in a cooperatively breeding passerine, Jungle Babbler, based on three aspects of complexity: an extensive repertoire of acoustically-distinct calls, within-call structural complexity and the diverse behavioural contexts in which these calls are used. Jungle Babblers were found to possess a structurally and functionally diverse vocal repertoire comprising 15 different calls. Detailed acoustic analyses of multisyllabic calls revealed that these calls are composed of different notes. Further, despite a large number of notes present in the repertoire, the number of calls were limited to 15. This implies that there may be underlying rules that determine call composition to give rise to functional calls to which receivers respond. We also found that these calls were produced in a variety of affiliative and agonistic contexts and were employed towards coordination of diverse social behaviours including group movement, foraging, brood care, aggression and vigilance. Yet, 7 out of 15 vocalizations were produced in the context of vigilance. This disproportionate investment of vocalizations towards co-ordinated acoustic vigilance is characteristic of many cooperatively breeding birds. Our study extends support for the social complexity hypothesis and also lays the foundation for future investigations on combinatorial and syntactical rules underlying call structure and function in bird vocalizations.Significance statementStudies on vocal complexity in birds have focussed mainly on repertoire size, structure and function. However, fine temporal and spectral features of elements that constitute a call/song are rarely examined to evaluate vocal complexity. We examined complex communication in a cooperatively breeding social passerine, Jungle Babbler for which we assessed repertoire size, function, acoustic features of calls and of their constituent elements. Jungle Babblers were found to possess a structurally and functionally diverse vocal repertoire comprising of 15 calls, 46% of which were in the context of vigilance, thereby extending support to the social complexity hypothesis. We also found that several calls were composed of multiple, acoustically distinct notes. These findings will be foundational in understanding the interrelations between sociality and communicative complexity and underlying combinatorial rules that determine call structure and function.

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