Human Behavioral Ecology Research Articles

Social Services Cooperating with Schools to Enable Community: The Case of two Territories of Southern Italy

ABSTRACT The Program of Intervention for Prevention of Institutionalization (P.I.P.P.I.) is a programme that integrates research, training, and intervention in working with families living in vulnerable situations. It is funded by the Italian Ministry of Welfare and, since 2011, has cumulatively involved roughly 8000 professionals from Social and Health Services and Schools, as well as 4000 children and their families in more than 200 territories across Italy. P.I.P.P.I. focuses on supporting children and families through multi-professional, holistic, and resilience-based interventions, in order to reduce child neglect. Bronfenbrenner’s ecology of human development and its definition of neglect are the rationale for the programme, and discussing the theories on community and community capacity linked with resilience theory, this paper reflects on enabling community as an approach to alleviating social disadvantage and promoting child, family, and community wellbeing and resilience. The cases of two territories in Southern Italy will be presented and reviewed in order to illustrate how the service-school-family relationship was promoted within a resilience community approach. Using information from meetings, focus-groups with professionals, and document reviews, programme implementation will be presented and discussed to explore how the governance of social services and school-based service providers make decisions and organize activities to facilitate participation by children, parents, teachers, and social professionals, enabling more community development. Implications for practice, policy and research are highlighted.

Identificação de deficiências entre crianças indígenas nas aldeias de Dourados/MS

This study aimed to map indigenous children with signs of disabilities, born in Dourados/MS, between 2009 and 2014, and to evaluation visual impairment associated with cerebral palsy in the age group from zero to five years. The research was based on the ecology of human development and in ethnographic principles, relying on the active participation of family members in the application of the Functional Evaluation instruments of the Integrated Vision for Global Development, whose protocols were adapted to the language, culture and indigenous daily life. The mapping surveyed the number and birth conditions of indigenous children, as well as the location of five children with visual impairment and cerebral palsy. In turn, the evaluations of visual functioning and global development made it possible to identify the specific needs arising from the disability situation and reflect on strategies for early intervention, with a view to better learning opportunities in early childhood.

The curious case of bunnies: interpretation of the lagomorph index from Homol’ovi I, Room 733

Applications of lagomorph indices to faunal assemblages in the American Southwest have produced a complex series of hypotheses and explanations for the changing ratio between Sylvilagus (cottontail rabbits) and Lepus (jackrabbits) in the archaeological record. Archaeologists attribute shifts in the lagomorph index (LI) to variation in the natural environment, modification of the landscape by Native Americans, changes in human hunting behaviors, and depression of Lepus populations through differential hunting. Couched within the logic of human behavioral ecology (HBE), LI attempts to connect species representation to environmental change and human decision-making. The varied ecosystems, cultures, and environments of the American Southwest complicate this connection and make some interpretations better suited to different subregions. In this paper, we report results from the analysis of faunal remains from Room 733 at Homol’ovi I, an ancestral Hopi site near Winslow, Arizona. Room 733 dates to the Late Homol’ovi Phase (LHP) 1385–1400 but also includes dates from the Early Homol’ovi Phase (EHP) 1330–1365. We calculate the LI for both phases to evaluate different explanations for shifts in the LI relative to regional moisture patterns. We find that while most explanations for changing LI are interconnected, changing environmental moisture, human hunting behaviors, and depression of Lepus populations do not fully explain the shifting LI. We suggest that human niche construction provides the most satisfactory explanation for changing lagomorph representation in the assemblage from Homol’ovi Room 733.

Deglacial landscapes and the Late Upper Palaeolithic of Switzerland

The presence of people in Switzerland in recently deglaciated landscapes after the Last Glacial Maximum represents human utilisation of newly available environments. Understanding these landscapes and the resources available to the people who exploited them is key to understanding not only Late Upper Palaeolithic settlement in Switzerland, but more broadly human behavioural ecology in newly inhabited environmental settings. By applying bone collagen stable isotope analysis (δ13C, δ15N and δ34S) to faunal remains from Late Upper Palaeolithic localities in Switzerland, we investigate animal ecology and environmental conditions during periods of human occupation. High and relatively uniform δ34S values indicate that landscapes north of the Jura Mountains provided comparatively stable environmental conditions, while lower and more variable δ34S values on the Swiss Plateau suggest a dynamic landscape with diverse hydrological and pedological conditions, potentially linked to regionally different patterns of permafrost thaw. This contrasts with the archaeological record that appears relatively uniform between the two regions, suggesting people were employing similar subsistence behaviours across a range of environmental settings. The pattern of change in δ15N across the deglacial period appears consistent between areas that remained ice-free throughout the LGM and those that were glaciated. Most notable is a period of exclusively low δ15N values between 15,200 and 14,800 cal. BP, which could relate a regional expansion of floral biomass in response to environmental change.

What Do Mothers Experiencing Poverty Need to Support Their Young Children? Parent, School, and Policy Perspectives

Parents experiencing poverty are rarely consulted about their needs when it comes to supporting the development, well-being, and education of their young children. Furthermore, they are often overlooked as experts on their own needs by actors in positions of power and excluded from spaces and processes that aim to create resources, programs, and policies to support families of young children. Using an ecological systems framework (Bronfenbrenner in: The ecology of human development: experiments by nature and design. Harvard University Press, Cambridge, 1979), we conducted a qualitative interview study of mothers’ needs in a school community in Central Texas as perceived by multiple community members, including mothers themselves, teachers, school administrators, district leaders, and policymakers (n = 14). The findings show that the three mothers felt they needed more money, time, opportunities for self-care, and validation to support their young children in the ways they would like to. Actors in positions of power (teachers, school administrators, district leaders, and policymakers) however, primarily discussed mothers’ needs for education, training, and models of parenting. To a lesser extent, actors in positions of power also discussed needs that partially reflected those expressed by mothers, including a need for higher wages and more money, childcare to free up time, and emotional support or social capital to provide validation of mothers’ parenting. We discuss the importance of understanding mothers’ needs as they are expressed by mothers themselves, the danger of framing support for parents experiencing poverty using a banking model of education (Freire in: Pedagogy of the oppressed: 30th anniversary edition. Continuum, New York, 2000), and areas of alignment from which we can build towards dialogic understanding and collaboration.

Exploring Sea Country through high-resolution 3D seismic imaging of Australia’s NW shelf: Resolving early coastal landscapes and preservation of underwater cultural heritage

Almost 2 million square km of Australia’s continental shelf was flooded following the termination of the last glacial maximum, and with it the cultural heritage of the first arrival and coastal occupation of Australia beginning some 65,000 years ago. In order to prospect for this missing cultural record, we must first identify submerged coastal landscapes and landforms that likely provided favourable environments for occupation and resource use. However, this task is challenged by the sheer size of the Australian continental margin. To help address this, we use industry 3D seismic datasets, that cover vast areas of Australia’s continental shelf, to map seafloor bathymetry at high resolution (10–25 m). Our study focuses an area of 6500 square km on the mid/outer shelf regions proximal to Barrow Island. The 3D seismic bathymetry revealed a highly complex and geomorphically mature coastal landscape preserved at depths of 70–75 m below sea level, including coastal barrier dunes, lagoonal systems, tidal flats and estuarine channels. Based on the depth of the submerged shorelines and reconstructed sea level curves, the age range of these coastal landforms is constrained to Marine Isotope Stage 3 (57–29 ka), which overlaps with the known onset of occupation at Barrow Island and the wider Carnarvon bioregion and the adjacent Pilbara. Such feature preservation has significant geoheritage value, but also allows for human behavioural ecology modelling and provides targets for future dating and site survey.

The ecology of CLIL teachers in Austria – an ecological perspective on CLIL teachers’ wellbeing

ABSTRACT In this article, we will report on an exploratory, qualitative study investigating the professional subjective wellbeing (SWB) of secondary school Content and Language Integrated Learning (CLIL) teachers in Austria from an ecological perspective. The aim is to better understand how the SWB of these teachers is shaped by different levels of their ecology. The implementation and teaching of CLIL is a multifaceted, dynamic process that cannot be viewed in isolation from a multitude of interrelated factors which directly shape teacher SWB. For this reason, we analyze CLIL teachers’ wellbeing, based on Bronfenbrenner’s ecological systems theory ([2009]. Ecology of Human Development. Cambridge: Harvard University Press.). The model was developed based on the analysis of data generated through a series of semi-structured interviews with 16 Austrian teachers, who report on their experiences and perspectives of teaching CLIL. The findings cast light on how CLIL teacher SWB is shaped by a variety of interlacing factors, such as national and institutional policy, societal feedback, student-teacher relationships, and personal conviction. The article concludes with a discussion of the implications of these findings for CLIL teachers, both personally and professionally, as well as education policy-makers.

Satellite-based remote sensing rapidly reveals extensive record of Holocene coastal settlement on Madagascar

Despite decades of archaeological research, roughly 75% of Madagascar's land area remains archaeologically unexplored and the oldest sites on the island are difficult to locate, as they contain the ephemeral remains of mobile hunter/forager campsites. The known archaeological record is therefore biased toward later sites, especially sites dating to the second millennium AD, following the expansion of Indian Ocean trading networks. Systematic archaeological investigations are required to address these biases in the known archaeological record and clarify the island's early human history, but funding limitations, logistical and time constraints in surveying large areas and a relatively small number of active field archaeologists present substantial barriers to expansive areal survey coverage. Using theoretical models derived from human behavioral ecology (i.e., ideal free distribution, optimal foraging theory) in conjunction with freely available remote sensing data, we illustrate how archaeological survey of Madagascar's landscapes can be rapidly expanded, more effectively target early archaeological deposits, and address questions about the island's settlement. This study illustrates the potential for theoretically-driven satellite-based remote sensing analysis to improve our understanding of the archaeological record of the world's fourth largest island.

Return rates from plant foraging on the Cape south coast: Understanding early human economies

The Cape south coast of South Africa has attracted significant archaeological research because it hosts the earliest evidence of human cultural and material complexity. Furthermore, the now-submerged Palaeo-Agulhas Plain provided habitat and resources for humans during the emergence of modern behavioural traits. Using a human behavioural ecology approach—optimal foraging theory—we sought to understand how this region’s flora may have contributed to the existence of early humans along the Cape south coast. We conducted monthly plant food foraging excursions over a two-year period in the seven main vegetation types that occur within the study area. Two (rarely three) local inhabitants harvested indigenous edible plant parts in 30-min foraging bouts. A total of sixty-eight participants (of Khoe-San descent), with knowledge on edible indigenous flora, contributed to 451 bouts. This study thus provides the largest published actualistic dataset on plant foraging returns. Without any prior knowledge of spatial resource density, the foragers harvested a total of 90 different edible species and obtained an overall mean (±SD) hourly return of 0.66 ± 0.45 kg/h or 141 ± 221 kcal/h. Apart from renosterveld, where winter returns were higher compared to summer, all other vegetation types showed no seasonal difference in return rates. Plants, therefore, most likely played an important role as fall-back or reliable staple food in the Cape south coast. Edible resources were unevenly distributed spatially, with calorific returns ranging from 0 to 2079 kcal/h, with fewer — but productive — high-density areas or “hotspots”. Sand fynbos (246 ± 307 kcal/h) and dune fynbos-thicket mosaic (214 ± 303 kcal/h) yielded significantly higher returns than other vegetation types (except for riparian). Prior knowledge of such hotspots, both within and amongst vegetation types, would have offered a significant foraging advantage. Finally, we provide the first quantified evidence that forager-extracted plant returns are significantly higher—nearly three times higher—in recently burnt sand and limestone fynbos vegetation. This supports Deacon’s hypothesis that hunter-gatherers could have improved their return rates by purposely burning Cape vegetation (i.e. “fire-stick farming”) to give them access to temporally abundant geophyte "hotspots". We also demonstrate the current challenges when comparing plant return rates across different studies and discuss the benefits of using participants that are not full-time hunter gatherers.

Sedentism and Settlement in Native California: Research Progress and Prospects

ABSTRACTThe ethnographic literature of California has long attributed some measure of reduced mobility to nearly all of its Native societies, but methods for determining this measure for any given group have greatly varied. Treatment of sedentism in the archaeological literature has been approached from multiple theoretical perspectives, including those derived from cultural evolution, cultural ecology, human behavioral ecology, and neo-Marxism. Here we provide a brief review of the history of treatment regarding the issue of sedentism in California archaeology, beginning with an overview of general theory on hunter-gatherer sedentism in anthropological literature, followed by a review of selected California ethnographic accounts, and regional models. We conclude with recent and encouraging findings from newer analytical studies and offer recommendations to researchers for making progress in future studies on this topic.

Lithic economy and prehistoric human behavioral ecology viewed from southern Jordan

A lithic sourcing study coupled with analyses of lithic reduction strategies and settlement- procurement patterns of Middle Paleolithic (Late Levantine Mousterian) and Early Neolithic (Late Middle PPNB) occupations revealed intertwined factors that shaped the different lithic provisioning strategies of the prehistoric groups. The accessibility and morphometrics of lithic sources, the techniques guiding the reduction process, economizing measures conditioned by elements of Optimal Foraging Theory and the settlement-procurement patterns of the consuming groups were important factors modeling the different lithic provisioning strategies. The interrelationship of these factors traces the complex process of lithic procurement and places it more fully within the context of human behavioral ecology.

Ecological economics for humanity’s plague phase

The human enterprise is in potentially disastrous ‘overshoot’, exploiting the ecosphere beyond ecosystems’ regenerative capacity and filling natural waste sinks to overflowing. Economic behavior that was once ‘rational’ has become maladaptive. This situation is the inevitable outcome of humanity’s natural expansionist tendencies reinforced by ecologically vacuous growth-oriented ‘neoliberal’ economic theory. The world needs a more ecologically-informed economics yet, despite its self-description, contemporary ‘ecological economics’ does not adequately reflect key elements of human evolutionary and behavioral ecology. How should the discipline develop? This paper briefly considers some of the missing pieces that are particularly relevant to humanity’s econo-ecological predicament: competitive displacement of non-human species through habitat and resource appropriation; humans as exemplars of the maximum power principle; the implications of ‘far-from-equilibrium’ thermodynamics; and evidence that H. sapiens is in the plague phase of a global population cycle. I then describe some of motivational and cognitive roots of crisis denial that extend even into the 2015 Paris climate accord. The paper concludes with: a) a list of principles for ecological economics consistent with the analysis and; b) a minimal set of policy actions necessary for the global community to achieve a more equitable steady-state economy and stable population within the biocapacity of nature.

Repeatable glucocorticoid expression is associated with behavioural syndromes in males but not females in a wild primate.

Behavioural syndromes are a well-established phenomenon in human and non-human animal behavioural ecology. However, the mechanisms that lead to correlations among behaviours and individual consistency in their expression at the apparent expense of behavioural plasticity remain unclear. The ‘state-dependent' hypothesis posits that inter-individual variation in behaviour arises from inter-individual variation in state and that the relative stability of these states within an individual leads to consistency of behaviour. The endocrine stress response, in part mediated by glucocorticoids (GCs), is a proposed behavioural syndrome-associated state as GC levels are linked to an individual's behavioural responses to stressors. In this study, in wild Barbary macaques (Macaca sylvanus), consistent inter-individual differences were observed in both sexes for GC activity (faecal glucocorticoid, fGC concentrations), but not GC variation (coefficient of variation in fGC concentrations). The expression of the behavioural syndrome ‘Excitability' (characterized by the frequencies of brief affiliation or aggressive interactions) was related to GC activity in males but not in females; more ‘excitable' males had lower GC activity. There was no relationship in females between any of the behavioural syndromes and GC activity, nor in either sex with GC variation. The negative relationship between GC activity and Excitability in males provides some support for GC expression as a behavioural syndrome-generating state under the state-dependent framework. The absence of this relationship in females highlights that state-behavioural syndrome associations may not be generalizable within a species and that broader sex differences in state need to be considered for understanding the emergence and maintenance of behavioural syndromes.

Vietnamese pre-schoolers’ tablet use and early childhood learning: an ecological investigation

ABSTRACTAs Vietnam’s economic growth and consumer demands continue to accelerate, more Vietnamese families are now able to acquire portable touchscreen devices such as iPads. Previous research has shown that the use of touchscreen devices can benefit pre-schoolers’ learning, especially within school and home settings. However, little is known about the broader sociocultural environment within which such technology adoption by families with pre-schoolers takes place, especially in the Global South. Guided by Bronfenbrenner’s ecology of human development, this research investigates the ecology of tablet use and early childhood learning by pre-schoolers in Vietnam through an ethnographic investigation of 42 mother-child dyads. We found that Vietnamese pre-schoolers’ tablet use for the purpose of early childhood learning was initiated, sustained or even enforced by their parents. Vietnamese mothers strongly regard tablets as learning tools that give their children a distinct edge in educational achievement. However, such enthusiastic appropriation of the tablets was not matched by the mothers’ concomitant understanding of the benefits and risks of touchscreen devices for children, nor the availability of social scaffolding structures for the parents.

Recent origin and evolution of obesity-income correlation across the United States

From a gene-culture evolutionary perspective, the recent rise in obesity rates around the Developed world is unprecedented; perhaps the most rapid population-scale shift in human phenotype ever to occur. Focusing on the recent rise of obesity and diabetes in the United States, we consider the predictions of human behavioral ecology (HBE) versus the predictions of social learning (SL) of obesity through cultural traditions and/or peer–to–peer influence. To isolate differences that might discriminate these different models, we first explore temporal and geographic trends in the inverse correlation between household income and obesity and diabetes rates in the U.S. Whereas by 2015 these inverse correlations were strong, these correlations were non-existent as recently as 1990. The inverse correlations have evolved steadily over recent decades, and we present equations for their time evolution since 1990. We then explore evidence for a “social multiplier” effect at county scale over a ten-year period, as well as a social diffusion pattern at state scale over a 26–year period. We conclude that these patterns support HBE and SL as factors driving obesity, with HBE explaining ultimate causation. As a specific “ecological” driver for this human behavior, we speculate that refined sugar in processed foods may be a prime driver of increasing obesity and diabetes.

The evolutionary anthropology of political leadership

Existing approaches within leadership studies often share a bias towards industrialized societies and lack broader cross-cultural and ethological reference. Meanwhile, cross-cultural and evolutionary approaches within anthropology are actively working to unify research on leadership and followership across the biological and social sciences. This review provides a novel and thorough view of political leadership as investigated by evolutionary anthropologists and highlights the benefits of incorporating findings from the evolutionary social sciences into leadership studies generally. We introduce the anthropological approach to leadership; describe evolutionary anthropology, its subdisciplines (including primatology, paleoanthropology, paleogenetics, human behavioral ecology, and gene-culture coevolution), and its complementary disciplines (particularly evolutionary psychology); review leadership and hierarchy in nonhumans, including our extinct hominid ancestors; review female leadership and sex-differences; and, primarily, discuss the relationships between evolution, ecology, and culture as they relate to the observed patterns of political leadership and followership across human societies. Through evolutionary anthropology's diverse toolkit, a deeper insight into the evolution and cross-cultural patterning of leadership is realized.

A multilevel approach to understanding student and teacher perceptions of classroom support during early adolescence

Supportive classroom environments are associated with improved student outcomes, particularly during early adolescence (ages 10–14 years). Applying Bronfenbrenner’s ecological systems theory to further investigate the microsystem of the school (Bronfenbrenner and Morris in The ecology of human development, Harvard University Press, Boston, 1998), we examined how student and teacher perceptions of classroom support relate to one another and identified which ecological characteristics impact student and teacher perceptions of support. Using data from 35 grade 5–6 classrooms, we examined parallel models of students’ and teachers’ perceptions of classroom support as a function of individual-, classroom- and school-level characteristics. Students’ perceptions varied substantially between students in the same classroom, and differences between schools accounted for important variability in students’ perceptions. In contrast, teachers’ perceptions showed no between-school variability; all variability in teachers’ perceptions could be attributed to varying experiences of teachers in the same school. Additionally, students’ perceptions of support were significantly and positively associated with teachers’ perceptions of support. Taken together, results suggest that educational interventions targeting classroom processes should be enacted at the school level and assessed by both teacher and student in an attempt to capture the breadth of perceptions and optimise outcomes among early adolescents.

Hunter-gatherer diets and human behavioral evolution

Human behavior and physiology evolved under conditions vastly different from those which most humans inhabit today. This paper summarizes long-term dietary studies conducted on contemporary hunter-gatherer populations (sometimes referred to as foragers). Selected studies for the most part that use evolutionary theoretical perspectives and data collection methods derived from the academic field of human behavioral ecology, which derives relatively recently from the fields of evolutionary biology, ethology, population biology and ecological anthropology. I demonstrate how this body of research illuminates ancestral patterns of food production, consumption and sharing, infant feeding, and juvenile subsistence contributions in hunter-gatherer economies. Insights from hunter-gatherer studies are then briefly discussed within the context of better-studied human populations that are Westernized, Educated, Industrialized, Rich, and Democratic (WEIRD).

Male aggressiveness as intrasexual contest competition in a cross-cultural sample

Sexual selection favors traits that increase mating and, thus, reproductive success. Some scholars have suggested that intrasexual selection driven by contest competition has shaped human male aggression. If this is the case, one testable hypothesis is that beliefs and behavior related to male aggression should be more prevalent in societies where the intensity and strength of sexual selection is higher. Measured by factors such as (a) the presence and scope of polygyny; (b) the number of same-sex competitors relative to potential mates, and (c) the amount of effort males are available to allocate to mating. Using Bayesian item response models with imputation and data from 78 societies in the Standard Cross-Cultural Sample, we found robust support for this hypothesis when using variables related to male aggression. We ruled out some potential alternative explanations by controlling for geographic region and confounding variables such as political complexity and warfare. Intersexual selection or mate attraction has been well studied in both evolutionary psychology and human behavioral ecology. Intrasexual selection or competition between members of the same sex for mates has been investigated much less. Of the current studies, there is still a divide in the literature as to whether intrasexual selection could have shaped human male aggression. For this reason, we tested the idea with data from a wide range of societies, the first systematic cross-cultural study to do so. Our results suggest that factors affecting the intensity of competition for mates led to the evolution of beliefs and behavior related to male aggression in small-scale human societies. This provides support for the hypothesis that intrasexual selection has been a driving force in shaping human male aggression.

Evolutionary demography of age at last birth: integrating approaches from human behavioural ecology and cultural evolution.

Cultural evolutionary theory and human behavioural ecology offer different, but compatible approaches to understanding human demographic behaviour. For much of their 30 history, these approaches have been deployed in parallel, with few explicit attempts to integrate them empirically. In this paper, we test hypotheses drawn from both approaches to explore how reproductive behaviour responds to cultural changes among Mosuo agriculturalists of China. Specifically, we focus on how age at last birth (ALB) varies in association with temporal shifts in fertility policies, spatial variation and kinship ecologies. We interpret temporal declines in ALB as plausibly consistent with demographic front-loading of reproduction in light of fertility constraints and later ages at last birth in matrilineal populations relative to patrilineal ones as consistent with greater household cooperation for reproductive purposes in the former. We find little evidence suggesting specific transmission pathways for the spread of norms regulating ALB, but emphasize that the rapid pace of change strongly suggests that learning processes were involved in the general decline in ALB over time. The different predictions of models we employ belie their considerable overlap and the potential for a synthetic approach to generate more refined tests of evolutionary hypotheses of demographic behaviour.This article is part of the theme issue ‘Bridging cultural gaps: interdisciplinary studies in human cultural evolution’.