Increased opposite sex association is linked with fitness benefits, otherwise sociality is subject to stabilising selection in a wild passerine

Animal sociality, an individuals propensity to association with others, has consequences for fitness, and particularly mate choice. For example, directly, by increasing the pool of prospective partners, and indirectly through increased survival. Individuals benefit from both over the short-term as these benefits are associated with mating status and subsequent fecundity, but whether animal sociality also translates into fitness is unknown. Here, we quantified social associations and their link with annual and lifetime fitness, measured as the number of recruits and in de-lifed fitness. We measured this in birds visiting a feeding station over two non-breeding periods, using social network analysis and a multi-generational genetic pedigree. We find high individual repeatability in sociality. We found that individuals with an average sociality had the highest fitness, and that birds with more opposite-sex associates had higher fitness, but this did not translate to improved lifetime fitness. For lifetime fitness, we found evidence for stabilizing selection on between sex sociality measures, suggesting that such benefits are only short-lived in a wild population.

Socioecology of the Australian Tree Skink (Egernia striolata)

There is great diversity in social behavior across the animal kingdom. Understanding the factors responsible for this diversity can help inform theory about how sociality evolves and is maintained. The Australian Tree Skink (Egernia striolata) exhibits inter- and intra-population variability in sociality and is therefore a good system for informing models of social evolution. Here, we conducted a multi-year study of a Tree Skink population to describe intra-population variation in the social organization and mating system of this species. Skinks aggregated in small groups of 2–5 individuals, and these aggregations were typically associated with shared shelter sites (crevices and hollows within rocks and trees). Aggregations were typically made up of one or more adult females and, often, one male and/or juvenile(s). Social network and spatial overlap analyses showed that social associations were strongly biased toward kin. Tree skinks also exhibited high site fidelity regardless of age or sex. There were high levels of genetic monogamy observed with most females (87%) and males (68%) only breeding with a single partner. Our results indicate that Tree Skinks reside in small family groups and are monogamous, which corresponds with existing research across populations. Similar to previous work, our study area consisted of discrete habitat patches (i.e., rock outcrops, trees, or both), which likely limits offspring dispersal and promotes social tolerance between parents and their offspring. Our study clearly demonstrates that there is intra-population variability in Tree Skink social behavior, but it also provides evidence that there is a high degree of inter-population consistency in sociality across their geographic range. We also highlight promising possible avenues for future research, specifically discussing the importance of studying the nature and extent of Tree Skink parental care and quantifying the fitness outcomes of kin-based sociality in this species, which are topics that will further our understanding of the mechanisms underlying variation in vertebrate social behavior.

Rurality Versus Readiness: The Relationship Between State-Level Connection and Capacity Variables and the Management of Medical Stockpiles for a Public Health Emergency

This study investigates what factors contributed to the score a state received for managing its medical countermeasures stockpile pre-COVID-19. It is particularly interested in the relationship between a state’s level of rural population and its countermeasure management capacity. A fixed-effects regression analysis was run using data from 2016 to 2019 to test for a relationship between the percentage of rural population in a state and the states’ countermeasures management score, while controlling for other relevant social, economic, and political variables such as level of social associations, the segregation index, and the level of income inequality. Rurality and physicians per capita proved to be significant and negative. A subsequent analysis found that states with higher levels of rural populations have lower levels of COVID-19 vaccinations, even accounting for effective countermeasure management. This points to rural states having challenges in regard to medical countermeasures that cannot be completely solved with technocratic solutions.

Considering the Contradictions of Religion and Orthodox Christianity as concomitantly endorsing strife and accord – a Social Capital Perspective

This paper contributes to the existing literature by providing an discussion and a critique of the discourse of social capital as it relates to Christianity and in particular to an Orthodox stance. Religion is acknowledged as responsible for promoting factions in the world, as well as for the strife amongst the various religious groups. The New Testament is studied with the constituents of social capital – networks (groups), norms and trust – as a foundation for evaluating the ministries and teaching of Christianity with regards to the role thereof in promoting strife and unity and ultimately harmony amongst people. The ministry of Jesus Christ was distinctly opposed to the prevailing social capital in the then Jewish territories, as is the case in the epistles when speaking to the non-Jewish parishes. The prevailing normative principles were frequently censured, and the confrontational manner in which the established social groups were related to, aggravated by the entirely inclusive but absolutely exclusive standpoint, is deemed inexcusable and resulted in the execution of Christ and a number of his apostles and other followers. The threat to the trust amongst the Jewish citizens and also between the general population groups and religious leaders proved to be a major driving force in ongoing persecutions. Unity amongst the early Christians proved elusive and the absence of heterogeneity as a requirement for socially cohesive networks and groups served to explain this challenge. Diversity of ethnicity, language and culture impeded the spontaneous social associations. The epistles provide us with a rich account of the significance of diversity and the constant efforts towards unity and societal harmony. This is in concord with the Orthodox faith which is strongly in favour of acceptance of diversity and love for others. Social capital is an stimulating idea that has since biblical days become a focus for community advancement initiatives. The social capital perspective of the New Testament easily transcends into our reality of today and supports the relevance of Christian principles two thousand years later.

Daily ranging and den usage patterns structure fission-fusion dynamics and social associations in spotted hyenas

Environment structure often shapes social interactions. Spatial attractors that draw multiple individuals may play a particularly important role in dispersed groups, where individuals must first encounter one another to interact. We use GPS data recorded simultaneously from five spotted hyenas (Crocuta crocuta) within a single clan to investigate how communal dens and daily ranging patterns shape fission-fusion dynamics (subgroup splits and merges). We introduce a species-general framework for identifying and characterizing dyadic fission-fusion events and describe a taxonomy of ten possible configurations of these events. Applying this framework to the hyena data illuminates the spatiotemporal structure of social interactions within hyenas' daily routines. The most common types of fission-fusion events involve close approaches between individuals, do not involve co-travel together, and occur at the communal den. Comparison to permutation-based reference models suggests that den usage structures broad-scale patterns of social encounters, but that other factors influence how those encounters unfold. We discuss the dual role of communal dens in hyenas as physical and social resources, and suggest that dens are an example of a general "social piggybacking" process whereby environmental attractors take on social importance as reliable places to encounter conspecifics, causing social and spatial processes to become fundamentally intertwined.

DO ENTREPRENEURIAL DYNAMICS AND EMPLOYMENT INFLUENCE ECONOMIC GROWTH? EVIDENCE FOR ROMANIA

The literature on the relationship between entrepreneurship, firm formation and economic development often describes entrepreneurship as a complex phenomenon, led by individuals, embedded in a broad economic and societal context, which, in regional terms, influences the quality and results of the entrepreneurial process. From a micro-economic perspective, the region is shaped by the myriad of laborious and innovative actions of entrepreneurs, looking for opportunities, taking risks, starting businesses and generating economic and social associations. Competition, trust, networks, mentalities, the education system, public policies, all are ingredients that can provide opportunities for many actors at the local level (institutions, businesses, population, etc.) and thus, for the region as a whole to thrive. Often these elements can offer the opportunities of economic convergence between regions and countries. On the other hand, we found that the potential of entrepreneurship to generate benefits and an impetus for the economic growth of regions were not fully researched and understood, despite suggestive empirical evidence and a rich literature in regional studies. In this article we analysed, at the level of the 8 development regions of Romania, the relation between the firm’s formation and the evolution of the Gross Domestic Product, respectively the relation between employment/active population and the evolution of the Gross Domestic Product. We did not find clear evidence that the pace of setting up new businesses has a certain effect on economic growth or employment, but we found that in some regions, better equipped in terms of infrastructure, qualification and diversity of human capital, entrepreneurial dynamics could moderately influence the positive evolution of these macroeconomic indicators.

The benefits of merging passive and active tracking approaches: new insights into riverine migration by salmonid smolts

The process of smolting is a critical phase in the life-cycle of anadromous salmonids and it has been associated with substantial rates of mortality. Survival during freshwater and marine migration is known to have population level effects, thus an understanding of the patterns of mortality has the potential to yield important insights into population bottlenecks. Despite important advancements in tracking techniques, the specifics of mortality events in anadromous salmonids during their initial migration to sea remains somewhat elusive. Here, we develop a framework combining spatial and temporal detections of smolt riverine migration from two tracking techniques, which enable inferences to be made about mortality locations, causes, and rates. We embed this framework into a fine-scale behaviour study of migration and social structure. In this study, we demonstrate that during their initial riverine transitional phase, smolts were particularly vulnerable to predators. Specifically, avian predation appeared to be the main cause of mortality (42%), although piscine predation events were not trivial (14%). Our results suggested some direct and indirect tagging-induced mortality (e.g., through increased predation vulnerability), which highlights the importance of determining tagging mortality in a telemetry study to ensure adequate interpretation of migration success. There is evidence that predation induced selection on smolt morphology. Unsuccessful river salmon migrants with a phenotype comprising a shorter head and jaw and smaller eye had a higher probability of mortality in the later parts of riverine migration where avian and aquatic predation mortality dominated. In contrast, mortality earlier in river migration was independent of phenotype, most likely a result of tagging effects. Successfully river migrants were found to be interacting with each other, often in a pair or as a trio, indicating that a few individuals of Atlantic salmon and sea trout formed notable intra- and interspecific social associations. However, the heterogeneity of the social associations of successful migrants did not support the assumption that social network features attributed any clear specific benefits of reduced predation risk. Overall, by estimating migration loss and its variability, our study framework should help to guide management actions to mitigate the widespread population declines these species are currently facing.

Differences in social-space–time behaviour of two red deer herds (Cervus elaphus)

Social-space–time-behaviour has developed very differently (e.g. a, loner, a herd, a pack) in the animal kingdom and depends on many different factors, like food availability, competition, predator avoidance or disturbances. It is known, that red deer are differently distributed in human disturbed areas compared to areas with less anthropogenic influences. But knowledge about the potential influence of human presence on social associations and interactions is rare, albeit differences may result in changing impacts on the environment, such as habitat utilization and feeding damage. Therefore, we investigated differences in the space use and social association of red deer. We studied two radio-collared herds of non-migratory populations in two study areas, which were comparable in landscape structure and vegetation structure, but differed in accessibility for visitors and the extent of their presence. Between the two study sites we compared the home range size, the differences in the extent of home range overlap within each study site and the space–time association (Jacobs Index) of individuals. Additionally, we present data on seasonal variations of home range sizes and social association all year round. In order to compare human activity in the study sites, we used the data from our long-term camera trap monitoring. The herd in the area with more human activity had significantly smaller home ranges and had greater year-round social associations in almost all seasons, except summer. We assume that smaller home ranges and higher association between animals may result in a higher feeding pressure on plants and a patchier utilization in areas with higher disturbances.

Algorithm and Implementation of Human Following Co-bot using 2D LiDAR

Co-bots - collaborative robots are designed to interact directly with humans in close proximity. Some human-robot collaborative applications like surveillance, clinical services, media outlets, defense, and social associations, may require an autonomous robot to have the ability to distinguish and track a person and to follow him around. Smart suitcases and smart trolleys are practical applications of human detection and following co-bots. Initially seen as a special case of object tracking, the task of person following with autonomous robots before long turned into a challenging task of its own especially when using a short-range sensor like laser range scanner. Therefore, we have proposed and implemented an effective algorithm forintelligent detection, tracking, and following a specified target person. The decision is being made by the control unit based on the information obtained from 2D LIDAR mounted at knee height, hence, enabling the mobile co-bot to follow the target in a dynamic environment without any collision.

Companions and Casual Acquaintances: The Nature of Associations Among Bull Sharks at a Shark Feeding Site in Fiji

Provisioning activities in wildlife tourism often lead to short-term animal aggregations during the feeding events. However, the presence of groups does not necessarily mean that individuals interact among each other and form social networks. At the Shark Reef Marine Reserve in Fiji, several dozen bull sharks (Carcharhinus leucas) regularly visit a site, where direct feeding is conducted during tourism driven shark dives. On 3,063 shark feeding dives between 2003 and 2016, we visually confirmed the presence of 91 individual bull sharks based on external and long-lasting identification markings. We measured the intensity of associations between pairs of individuals by calculating the Simple Ratio Index (SRI) and calculated Generalized Affiliation Indices (GAIs) to distinguish true associations between dyads from structural predictor factors. Although the resulting mean SRIs were low, ranging from 0.01 to 0.12 (SRImean = 0.06; mean SRImax = 0.21), preferred long-term companionships were observed between individuals. Avoidances were also observed within pairs of individuals during the second half of the study. The best fitting model describing the temporal association patterns of bull sharks revealed a social structure which is characterized by preferred companionships and casual acquaintances. Our results suggest that the aggregation resulting from direct feeding has served to facilitate the development of social associations.