Social Aggregations Research Articles

Common animals: sedentary pastoralism and the emergence of the commons as an institution

Animal husbandry was of fundamental consequence in the planning and development of larger and more permanent communities. Pastoralism is often assumed to be highly mobile when considering social institutions and political formations, despite the diversity of husbandry practices that are either wholly, or largely, tethered to relatively sedentary social aggregations. Key tenets of more settled animal husbandry are intensive social relations between people, and between people, animals, and landscapes. This entails reciprocal, multispecies cooperative efforts to decide how to utilize pastoral resources, choose where to settle, and how to organize settlements with an eye for the animals. Yet, scholars have rarely considered how the logistics and social dynamics of pastoralism shaped the transition to sedentism and, particularly, the development of collective forms of governance in prehistory. In this paper, we re-center pastoralism in narratives of settling down, in order to recognize the critical ways that relations with animals shaped how humans learned to move and dwell in emergent grazing landscapes. We take an institutional approach to the concept of “the commons,” demonstrating the dynamics through 19th-century Irish rundale, then draw on case studies from Southern Scandinavia and the Carpathian Basin to consider the commons as a multispecies institution which resulted in variable sociopolitical formations of the European Bronze Age.

Russian civil society of wartime: the specifics of development in the conditions of Special military operationa

The purpose of the article is to study the trends and features of the development of civil society in the Russian Federation in the process of a special military operation in the regions of historical Novorossiya. It is noted that the influence of ITS on the functioning of the Russian model of the «third sector» leads to fundamental transformations of the nature of the state-civil dialogue. It is argued that the field of civil-military relations is becoming a priority area of interaction between society and the state in modern Russia. As evidence, examples are given of an increase in the composition of non-governmental structures both in the direction of their activities and in spreading to the lowest level of territorial and political organization. It is proved that the priority task of the vast majority of newly emerged and previously existing public entities is to provide some kind of support to units and units of the Russian army in theaters of armed struggle, as well as social protection of military personnel and their family members. For a very limited time period, institutionalized and networked associations en masse include all new social aggregations and territorial communities, which became the organizing link of the national patriotic upsurge during the period of their independence. It is predicted that those actors who have been able to prove themselves as a link between the army and the people will be able to act as a core component of civil society in Russia of the 21st century in the foreseeable future.

Estruturas Sociais Cognitivas em Contexto de uma Sala de Ensino Médio

Abstract Cognitive social structure maps the social relationships perceived by actors. This study characterizes the social network pattern of a high school classroom and verifies the perceived ties and the accuracy of social relationships reported by 23 students. Analyses of the cognitive social structure aggregations verified the density of these relationships. Most participants show vulnerabilities and conglomerate analysis of network structural data shows different perceptions of density and modularity. Our results differ from the limited literature in the area regarding higher accuracy in subjects with a lower centrality degree and intermediation.

Social Plasticity Enhances Signal-Preference Codivergence.

AbstractThe social environment is often the most dynamic and fitness-relevant environment animals experience. Here we tested whether plasticity arising from variation in social environments can promote signal-preference divergence-a key prediction of recent speciation theory but one that has proven difficult to test in natural systems. Interactions in mixed social aggregations could reduce, create, or enhance signal-preference differences. In the latter case, social plasticity could establish or increase assortative mating. We tested this by rearing two recently diverged species of Enchenopa treehoppers-sap-feeding insects that communicate with plant-borne vibrational signals-in treatments consisting of mixed-species versus own-species aggregations. Social experience with heterospecifics (in the mixed-species treatment) resulted in enhanced signal-preference species differences. For one of the two species, we tested but found no differences in the plastic response between sympatric and allopatric sites, suggesting the absence of reinforcement in the signals and preferences and their plastic response. Our results support the hypothesis that social plasticity can create or enhance signal-preference differences and that this might occur in the absence of long-term selection against hybridization on plastic responses themselves. Such social plasticity may facilitate rapid bursts of diversification.

Large‐scale human celebrations increase global light pollution

Abstract Culturally dependent human social behaviours involving artificial light usage can potentially affect light pollution patterns and thereby impact the night‐time ecology in populated areas, although to date this has not been examined globally. By analysing continuous (monthly), highly resolved, spatially explicit data on global night lights (Visible and Infrared Imaging Radiometer Suite–Day/Night Band‐VIIRS‐DNB; 2014–2019) with circular statistical techniques, we evaluated whether macro‐cultural activities involving social aggregations and the use of artificial lights shape annual lighting patterns globally. Scheduled routines associated with cultural‐specific festivities appear to be important drivers of observed seasonal patterns in urban night‐time lights. For instance, the display of Christmas lights between Christmas and Epiphany Day celebrations (December–January) coincides with the annual peak in urban night‐time light intensity in Christian countries. Analogously, night celebrations during the Holy Month of Ramadam (from May to July) or the month‐long period of Karthika Masam (from October to November) fits with annual night light peaks in Muslim and Hindu countries. Annual peaks of urban light intensity in China and Vietnam also match with Chinese and Vietnamese (Tê't) New Year celebrations (January–February). In contrast, predominantly Buddhist countries, which do not have such prominent and prolonged celebrations involving artificial lights, show a relatively uniform distribution of night light peaks throughout the annual cycle. Social behaviour and sociocultural contexts help explain how people modify the global nightscape and contribute to light pollution globally. Understanding the cultural contexts responsible for peaks in artificial light usage is an important first step if humans are to mitigate any deleterious effects associated with global increases in night‐time light pollution. Read the free Plain Language Summary for this article on the Journal blog.

Does fishing dismantle fish culture and ecosystem structure? Questions about the implications of social learning among fish and fishers

AbstractScientific awareness of social learning, especially among vertebrates, has expanded rapidly in recent decades. That literature suggests that social learning may be a second adaptive mechanism that interacts with and refines genetic adaptation. For an individual fish, learning from others reduces the costs of acquiring experience‐based behaviours and minimizes the hazards that arise from imperfect knowledge of local regularities. For a group of fish, social learning facilitates the evolution of time and place behaviours that work in its locality. It spreads those behaviours within the group and to subsequent generations. Thus, social learning enables persistent adaptation at a finer scale than might be possible through genetic processes alone. Strong evidence of genetic differentiation at less than a panmictic scale and persistent local depletions suggests regular, fine‐scale system structure. Social learning may play an important role in creating and maintaining this finer‐scale structure. Fishers' learned adaptations to the market and natural system usually lead them to target larger/older fish and fish aggregations at familiar times and places. However, older fish are likely to be the principal repository of the time‐and‐place experience required for local growth, survival, and reproduction, while social aggregations are important schools in which younger fish acquire the experience of older fish. Consequently, if adaptation through social learning is important among fish, there is reason to be concerned that heavy fishing of social learners reduces their abundance, as usually assumed, and impairs the inheritance of the socially learned experience required for persistent local adaptation.

Fish Cam

First pioneered in 2010, Fish Cam provides the opportunity for students to engage in novel behavioral research without the need for extensive materials or for leaving the classroom. Fish Cam utilizes a robust behavioral paradigm, shoaling behavior in fish, and enables students to collect information from simple, easy-to-understand observations, allowing for student-led experimental design, data collection, analysis, and discussions on the scientific process. In these ways Fish Cam removes the cost and time-intensive aspects of doing this sort of work in the classroom. Shoaling behavior, which is well represented in the scientific literature, refers to social aggregations of fish. Almost all species of fish form shoals, and this process is easy to study under laboratory conditions. An evolutionary adaptation, shoaling provides individuals better access to resources and decreases the risk of predation. In its initial launch, Fish Cam was highly successful as a learning tool but suffered from difficulties associated with delivering the information online in 2010. Now, with the rapid development of online communication tools associated with the COVID-19 pandemic, we have the second iteration of Fish Cam. The flexibility of new delivery platforms enables partner organizations to view experiments and adapt the experience to their specific educational goals. Here we present an overview of Fish Cam, including lesson plans, a description of shoaling behavior in fish, and the results of Fish Cam studies run in the fall of 2020.

The social role of song in wild zebra finches

Male songbirds sing to establish territories and to attract mates.1,2 However, increasing reports of singing in non-reproductive contexts3 and by females4,5 show that song use is more diverse than previously considered. Therefore, alternative functions of song, such as social cohesion3 and synchronization of breeding, by and large, were overlooked even in such well-studied species such as the zebra finch (Taeniopygia guttata). In these social songbirds, only the males sing, and pairs breed synchronously in loose colonies,6,7 following aseasonal rain events in their arid habitat.8,9 As males are not territorial, and pairs form long-term monogamous bonds early in life, conventional theory predicts that zebra finches should not sing much at all; however, they do and their song is the focus of hundreds of lab-based studies.10,11,12,13,14,15,16,17,18,19,20,21,22 We hypothesize that zebra finch song functions to maintain social cohesion and to synchronize breeding. Here, we test this idea using data from 5 years of field studies, including observational transects, focal and year-round audio recordings, and a large-scale playback experiment. We show that zebra finches frequently sing while in groups, that breeding status influences song output at the nest and at aggregations, that they sing year round, and that they predominantly sing when with their partner, suggesting that the song remains important after pair formation. Our playback reveals that song actively features in social aggregations as it attracts conspecifics. Together, these results demonstrate that birdsong has important functions beyond territoriality and mate choice, illustrating its importance in coordination and cohesion of social units within larger societies.

Social media and citizen science records are important for the management of rarely sighted whales

Social media content is increasingly being validated and used as a valuable source of data within conservation science. Metadata obtained from social networking sites (SNS) can supplement knowledge and data gaps in traditional ecological monitoring programs by increasing the spatiotemporal extent of sampling. Here we consider SNS in the context of rare and threatened species, which are difficult to monitor due to their often-inaccessible habitat, or elusive and unpredictable occurrences. We focus on a recovering large whale population, as charismatic megafauna often appear on SNS and are ideal for public outreach sightings data. Southern right whales (Eubalaena australis, SRW) were once abundant throughout New Zealand waters. However, following widespread population decline during whaling, no SRW was reported around the mainland for 35 years, with the remnant population persisting only in the remote subantarctic islands. By using sightings data from 2011 to 2021 in the New Zealand Department of Conservation's (DOC) Marine Mammal Database and supplementing with crowd-sourced sightings reports made on SNS (Facebook and iNaturalist), we present evidence that SRWs are continuing to recover slowly around the mainland compared to their subantarctic breeding grounds. All sightings' data were categorised based on confidence of accuracy, for example, accompanying genetic or photographic confirmation of species identity. Sightings remain rare with only 116 sightings from both DOC and SNS sources reported over the 11-year research period (2011–2021), hindering efforts to identify key habitats and implement conservation measures. SNS sightings increased the overall number and quality of sightings. Specifically, as SNS sightings were all accompanied by images permitting confident species ID, they increased the overall quality of the dataset and provided new information on the fine-scale movement and residency times of SRW. Although opportunistic data such as these have limitations, our work suggests that the recolonisation of SRWs around mainland New Zealand has not increased in the past decade. This could reflect historic loss of matrilineal knowledge of the mainland, or it could also be an artifact of very few whales, resulting in less social aggregations frequenting the region. Citizen science and the use of SNS data are important for the continued monitoring of the New Zealand SRW population, with SNS data creating further opportunities to monitor similarly rare and data deficient populations.

Survival of an Indian Ocean humpback dolphin Sousa plumbea in the wild despite chronic osteologic pathologies

Skeletal examination of a female adult Indian Ocean humpback dolphin Sousa plumbea from South Africa suggested a chronic disease process. It manifested as erosions and pitting of the atlanto-occipital articulation as well as circumferential hyperostosis and ankylosis of some of the caudal vertebrae, findings rarely recorded together in the same animal. The character of the erosive process and vertebral fusion appeared chronic, and further findings of underdevelopment of the fluke, sternum and left humerus with remodeling of the periarticular region of the left scapula may support initiation of the process early in life. Because such chronic pathology would have affected the individual’s locomotion and foraging abilities, we also postulate how this individual survived until its demise in a human-derived environmental hazard. Ecological and socio-behavioral aspects observed in S. plumbea, including habitat preference for inshore and shallow waters, small social group aggregations and feeding cooperation, may have contributed to its ability to survive.

Maintenance of species boundaries within social aggregations of ecologically similar goby sister species

Maintenance of species boundaries within social aggregations of ecologically similar goby sister species

Religious vocation or ‘tender and gentle administration’: African Methodist Episcopalian Church women and in-group appropriation

ABSTRACT The work of Black women scholars and the lives of Black women demand a revisit of Lynch’s notion of sacrality and Bailey’s axioms of Implicit Religion. In-group appropriation via the case study of Fanny Jackson Coppin and Black Methodist women in the USA renders visible religious labour or vocation, leadership, and expertise of women. An extension of Altglas, in group appropriation illustrates how they were received, characterised, regulated, and ‘remade’ through structures optimised for this end. To look at labour as a mode of religious agency among the underrepresented demands that we revisit agency and expertise within structures, and who is credited with the development of religious social aggregations. In-group appropriation shows how these routinised presumptions on the labour and expertise of these women with stylised gendered notions of credit occur; how organisations and movements change, and how women assert themselves and bring about change.

Remote acoustic detection and characterization of fish schooling behavior.

Many fish species form social aggregations or shoals. Understanding the conditions under which these groups sometimes coordinate their behavior in space and time, or "school," is important for understanding their ecology, their effects on the ecosystem, and effective management of their stocks. An automated approach to isolate acoustic aggregations in echosounder data relative to the local background scattering is introduced. Aggregations were then identified and characterized in a large dataset acquired from an autonomous platform and a research vessel. Fish schools were statistically distinct from other aggregations of fish, with differences in their geometry, frequency response, scattering intensity, and scattering distribution. The statistical distribution of acoustic scattering from fish shoals generally followed a Rayleigh distribution as predicted for a randomly organized aggregation of homogenous scatterers. Within fish schools, however, the distribution was distinct from Rayleigh, showing a consistent pattern with most values at low relative scattering levels followed by a sharp roll-off and long right tail. These differences in distribution provide the ability to remotely observe the polarized, organized behavior that defines schooling, a difficult to observe response to environmental and internal conditions, which has large implications for our understanding and management of schooling fish.

Rhinella icterica and Rhinella ornata (Anura: Bufonidae) tadpoles do not recognise siblings

Benefits conferred to animals living in groups may be greater if groups are formed by relatives rather than non-relatives, because cooperating with relatives increases the probability of their own genes being passed on to group offspring (inclusive fitness). Non-social aggregations are formed in response to environmental characteristics, while social aggregations are formed from the attraction among individuals. The attraction or repulsion between individuals is mediated by recognition mechanisms, which mediate important ecological processes and behaviours. Here, we conducted laboratory experiments to test if tadpoles of two sympatric bufonids, Rhinella icterica and R. ornata, are able to recognise siblings. We collected eggs of the two species in the field and raised them in laboratory settings, according to three different methods: siblings and non-siblings reared in separated containers; siblings and non-siblings reared in the same container separated by a plastic net; and eggs from the same spawn reared separately, each one in an individual container. Later, we tested if tadpoles could choose between groups of siblings and non-siblings. The results indicate that tadpoles of neither species were able to discriminate between siblings and non-siblings, regardless of the rearing methods. Therefore, kinship is less important than environmental factors in tadpole aggregation behaviour of these species, and it may be dependent on the balance between costs and benefits. Our results can be used as a start point to better understand tadpole aggregation behaviour and recognition mechanisms in these species.

Hunting and feasting in the pre-Columbian Andes: Exploring the nature and scale of early ceremonial aggregations in Tulan Ravine (5300 to 2400 yr cal. BP) through the circulation of obsidian artefacts

In the pre-Columbian Andes, ceremonial centres were places for large-scale periodic celebrations that facilitated interaction and the reproduction of social life; however, little is known about their role and emergence in early periods. In order to explore the nature and scale of social aggregations, we study the circulation of obsidian artefacts from two early ceremonial centres: Tulan-52 (5300 to 4200 cal. BP) and Tulan-54 (3200 to 2400 cal. BP). Compositional analyses indicate the exploitation of local obsidian, but with a significant contribution from several extra-local sources in the north of the Salar de Atacama (Chile), the Andes highlands (4000 masl) and the northwest of Argentina. According to technological studies and other complementary data, obsidian was employed mainly for the production of bifacial projectile points used in collective hunts and ritual feasts. Our data supports the existence of wide, decentralised inter-community networks fostered by inclusive access to these periodic congregations. We argue that early ceremonial centres were intended to maintain social cohesion and cooperative labour between trans-egalitarian groups in the face of the profound socio-economic changes introduced by the adoption of a more sedentary, pastoralist way of life.

On means and ends in structural economic analysis: Broadening the field of enquiry

Structural economic analysis (SEA) can be characterized as addressing means-ends problems at the systemic level. The paper argues that SEA can provide the theoretical tools for a broader field of enquiry, where the production system shapes the constraints and opportunities not only of a ‘systemic actor’ who pursues objectives on behalf of the entire system, but also of a variety of potential political-economic actors who pursue their own objectives. Doing so requires three analytical steps. First, instead of assuming the relevant actors at the outset, each model in SEA can be taken as suggesting different social aggregations that might count as actors. Second, productive structure can be interpreted, from the viewpoint of different actors, as imposing different constraints on, and offering different opportunities to, those actors. Third, we need to study which aggregations will count as the relevant actors in the situation under analysis.

The energetics of social signaling during roost location in Spix's disc-winged bats.

Long-term social aggregations are maintained by multiple mechanisms, including the use of acoustic signals, which may nonetheless entail significant energetic costs. To date, however, no studies have gauged whether there are significant energetic costs to social call production in bats, which heavily rely on acoustic communication for a diversity of social tasks. We measured energetic expenditure during acoustic signaling in Spix's disc-winged bats (Thyroptera tricolor), a species that commonly uses contact calls to locate the ephemeral furled leaves that they use for roosting. To determine the cost of sound production, we measured oxygen consumption using intermittent-flow respirometry methods, with and without social signaling. Our results show that the emission of contact calls significantly increases oxygen consumption; vocal individuals spent, on average, 12.42kJ more during social signaling trials than they spent during silent trials. We also found that as resting metabolic rate increased in males, there was a decreasing probability that they would emit response calls. These results provide support to the 'allocation model', which predicts that only individuals with lower self-maintenance costs can afford to spend energy in additional activities. Our results provide a step forward in our understanding of how physiology modulates behavior, specifically how the costs of call production and resting metabolic rate may explain the differences in vocal behavior among individuals.

Collective behaviour of the European minnow (Phoxinus phoxinus) is influenced by signals of differing acoustic complexity

Collective behaviour, such as shoaling in fish, benefits individuals through a variety of activities such as social information exchange and anti-predator defence. Human driven disturbance (e.g. anthropogenic noise) is known to affect the behaviour and physiology of individual animals, but the disruption of social aggregations of fish remains poorly understood. Anthropogenic noise originates from a variety of activities and differs in acoustic structure, dominant frequencies, and spectral complexity. The response of groups of fish may differ greatly, depending on the type of noise, and how it is perceived (e.g. threatening or attractive). In a controlled laboratory study, high resolution video tracking in combination with fine scale acoustic mapping was used to investigate the response of groups of European minnows (Phoxinus phoxinus) to signals of differing acoustic complexity (sinewave tones vs octave band noise) under low (150 Hz) and high (2200 Hz) frequencies. Fish startled and decreased their mean group swimming speed under all four treatments, with low frequency sinewave tones having the greatest influence on group behaviour. The shoals exhibited spatial avoidance during both low frequency treatments, with more time spent in areas of lower acoustic intensity than expected. This study illustrates how noise can influence the spatial distribution and social dynamics within groups of fish, and owing to the high potential for freshwater aquatic environments to be influenced by anthropogenic activity, wider consequences for populations should be further investigated.

Social and spatial patterns of two Afromontane crag lizards (Pseudocordylus spp.) in the Maloti‐Drakensberg Mountains, South Africa

AbstractUnderstanding the evolution of vertebrate sociality requires comparative data on social associations across the vertebrate phylogeny. In the case of group‐living lizards (i.e. species that live in stable social aggregations often associated with a shared resource), most work has focused on the Egerniinae in Australia, resulting in a taxonomic and geographic skew to our understanding of reptile sociality. The African cordylid lizards (Cordylidae) are also a promising system to study the evolution of sociality because grouping behaviour varies across the clade. Here, we studied the conspecific grouping behaviour of two crag lizards, Pseudocordylus langi and P. melanotus subviridis that occur at high elevations in the Maloti‐Drakensberg Mountains of South Africa. To better understand their social organisation and mating system, we also present data on their spatial distribution, sexual dimorphism, and bite force. Both Pseudocordylus spp. were sexually dimorphic in morphology (males had larger heads than females of similar body size), colouration (males were more colourful) and female P. langi had a weaker bite force than males. Both P. langi and P. m. subviridis were associated with rocky habitat on the mountainside (e.g. cliffs, rock buttresses, and rock outcrops) and both were spaced apart and rarely in groups (79% of P. langi and 90% of P. m. subviridis were observed alone). Based on our findings, we hypothesise that both Pseudocordylus spp. have a territorial social structure and a polygynous mating system. This novel natural history information about crag lizards supports the assertion that Cordylidae is another model system for examining the evolution of sociality.

Virtual Brand Communities: Engagement Profiles and Typology

Within the prevalent digital communication era, users have utilized digital connectivity to form social aggregations and virtual communities (VC) with unique features. Recently, millions of internet users have joined one or more brand virtual communities to serve their communication, knowledge-seeking, entertainment, and self-fulfillment needs. Virtual communities represent different contexts, objectives, and technical configurations catering to diverse consumption patterns. This article is the first to present virtual communities’ typology focusing on passion, professional, social, and commercial brand communities. This article also explores a comparative framework for brand communities’ engagement profiles in the four types of brand communities. Moreover, it outlines recommendations for future research relating to VC’s engagement in behavioral studies.