Reproductive Biology of the Introduced Mayan cichlid, Cichlasoma urophthalmus, Within an Estuarine Mangrove Habitat of Southern Florida

We investigated the reproductive biology of the Mayan cichlid, Cichlasoma urophthalmus, for twenty consecutive months in a southern Florida mangrove creek and compared it to that of available published accounts where this species is native. Mayan cichlid reproduction occurred during a period of the year when physical conditions facilitated the best growth and survival of the young, and was influenced more by changes in water level and salinity than by temperature. Most nests were observed along mangrove shorelines in April. The majority of reproduction and parental care of the young followed in May, and was completed by June when rising water levels flooded shallow habitats and dispersed young-of-year fish. Mayan cichlids in Florida became reproductively mature at a greater size than in native regions, but produced roughly the same number of eggs at a given body mass. The similarity of environmental conditions between southern Florida and areas where Mayan cichlids naturally occur imparts a very favorable reproductive potential for this species in southern Florida, and facilitates their continued presence within the ichthyofauna of the region.     

Victims and Aggressors at School: Teacher,Self, and Peer Perceptions of Psychosocial Functioning

Scholars theorize that engaging young people in organizational governance promotes positive youth development and organizational effectiveness. To explore this prediction, the study discussed here, based on interview data from 16 youth and 24 adult organizational leaders representing 8 organizations, mapped the developmental processes that occur when youth and adults share governance responsibilities. It was found that engaging youth in decision making secured the commitment of young people to their organizational communities, and additionally, contributed positively to youth development. Further, the adult leaders reported that the experience of working with youth had a positive effect on their own development and contributed to the overall efficacy of their organizations. These data indicate that organizational governance may offer a viable context through which youth can be active producers of their own development and of the communities in which they interact. Implications for future research and practice are discussed in light of these findings.     

Biographies for Artistic and Social Intervention: A Youth-Driven Project

This article discusses how biographical materials may be used in youth arts education projects to develop new methodologies and approaches that can stimulate artistic and social intervention in contemporary urban communities, thus changing the field of arts education policy at the community level. Through their creation of Artistic Society Projects, a group of young people from the arts education project Bando à Parte: Youth Cultures, Arts and Social Inclusion (O Teatrão, Coimbra, Portugal) have created a voice that may be used to transform their own communities. The starting points for this transformation are the young peoples’ biographical paths. The influence of youth on education policy may be strategically understood in the context of formal and nonformal school curricula. How can youth use their biographies to develop specific contributions both to change in individual behaviors and to social change in urban communities, influencing arts education policies to instigate action? The exploration of these processes through the work of artistic creation, inspired by collected biographical materials, represents a contribution to ongoing reflection on the issues of memory, identity, youth resistance, and community change in urban settings, influencing the ways in which arts education policy is understood and implemented.     

Delineating genetic relationships among the Maya

By 250 AD, the Classic Maya had become the most advanced civilization within the New World, possessing the only well-developed hieroglyphic writing system of the time and an advanced knowledge of mathematics, astronomy and architecture. Though only ruins of the empire remain, 7.5 million Mayan descendants still occupy areas of Mexico, Guatemala, Belize, El Salvador, and Honduras. Although they inhabit distant and distinct territories, speak more than 28 languages, and have been historically divided by warfare and a city-state-like political system, and they share characteristics such as rituals, artistic, architectural motifs that distinguish them as unequivocally Maya. This study was undertaken to determine whether these similarities among Mayan communities mirror genetic affinities or are merely a reflection of their common culture. Four Mayan populations were investigated (i.e., the K'iche and Kakchikel from Guatemala and the Campeche and Yucatan from Mexico) and compared with previously published populations across 15 autosomal STR loci. As a whole, the Maya emerge as a distinct group within Mesoamerica, indicating that they are more similar to each other than to other Mesoamerican groups. The data suggest that although geographic and political boundaries existed among Mayan communities, genetic exchanges between the different Mayan groups have occurred, supporting theories of extensive trading throughout the empire.     

A European project on health problems, mental disorders and cross-cultural aspects of developing effective rehabilitation procedures for refugee and immigrant youth

The project is an international comparative study on risk and protective factors of adolescent health and well-being, with particular focus on youth with immigrant (or refugee) experience. This is a comprehensive study on the quality of life and health outcomes of adolescent youth that looks at group-specific differences within different socio-cultural contexts across six European countries, including those of post-conflict communities. The research project combines both quantitative and qualitative methods, using a common set up across all countries involved with the goal of collecting data on 3500 adolescents that are strictly comparable to allow cross-country analyses. It is particularly aimed at increasing the understanding of acculturation processes of a particularly sensitive population of adolescent refugees and immigrants and of the influence that the interaction of contextual and developmental factors has on their mental health and psychological well-being. in COll. Antropol. 27 (2003) 2: 431–438     

Is Maternal Marriage Beneficial for Low-Income Adolescents?

The present study investigated the association of mothers' marriage and changes in young adolescents' cognitive and socioemotional development and changes in family processes. Analyses employed longitudinal data from the Three-City Study to track maternal partnerships for 860 low-income adolescents (10–14 years-old in Wave 1) across a 16 month period. No short-term benefits or risks emerged for youth when mothers entered marriage, with few changes in family or maternal functioning linked with marriage formation as well. In contrast, adolescents in stably married families experienced improved academic, behavioral, and psychological well-being compared to youth in stable cohabiting or single-parent families. Stable marriage was similarly linked to improvements across multiple domains of home and mothers' functioning. These patterns were not moderated by the male partner's identity (biological father or stepfather). Results support the benefits of stable marriage on youth development, but suggest that policies supporting movements into new marriages may not result in improved adolescent or family functioning, at least in the short term.     

Updating Images of South Sudan

In this essay, I compare and contrast two recent films that update the anthropological record on what has become of Nuer and Dinka people of southern Sudan by documenting their resettlement in the United States as refugees. Lost Boys of Sudan and A Great Wonder: Lost Children of Sudan Resettling in America trace the displacement of Sudanese youth by the civil war and their adaptation to U.S. life. Both films provide an alternative way of viewing these youth that challenges the "uprooted" and "denuded" refugee stereotype. By examining Nuer and Dinka within a refugee migration framework, these films engage broader theoretical questions about the tension between refugees as victims of larger structural events beyond their control and their adaptive strategies in negotiating complex and shifting circumstances.     

An insular record of the Mayan cichlid Mayaheros urophthalmus (Günther, 1862) (Cichliformes: Cichlidae) on an island 70 km offshore in the Honduran Caribbean

Here we report the first record of the Mayan cichlid, Mayaheros urophthalmus, occurring on an offshore island 70 km from the mainland, the most distant record from the mainland to date. Specimens were collected during several ichthyological surveys on the island of Guanaja, Honduras in November 2019. Mayan cichlids are euryhaline fishes that perform very well in fresh, brackish and marine waters. It has been hypothesized that their high tolerance to salinity and potential of using costal waterways has facilitated the colonization and expansion of M. urophthalmus.     

Adolescent Characteristics by Type of Long-Term Aim in Life

Surveys were administered to adolescents (N = 144) to determine if young people varied based on the type of long-term aims they held. Using cluster analysis, four groups emerged from the data: youth without clear long-term aims, youth with self-oriented long-term aims, youth with other-oriented long-term aims, and youth with both self- and other-oriented long-term aims. The latter two clusters represent potentially purposeful youth and the self-oriented cluster represents youth with meaning in their lives. Therefore, the authors were able to compare potentially purposeful youth to youth with meaning and to youth with neither purpose nor meaning in their lives. Youth with other-oriented long-term aims were more likely to be searching for a purpose, to have identified a purpose, to report higher levels of life satisfaction, and to score higher on openness. Implications for understanding the purpose construct and for fostering purpose among adolescents are addressed.     

Health and disease: Exploring the relation between parasitic infections,child nutrition status,and markets

Research in bioarchaeology and among living people provides insight into the biological and biocultural consequences of subsistence, political, and economic transitions. Central to this effort is examining infectious disease, such as diarrheal disease, respiratory infections, and parasitic infections because they are an important source of nutritional and energetic stress in both past and current groups. Although infection may not always result in overt disease, frequent exposure results in biological stress with a negative effect on child growth and, by extension, health. The goal of this article is to examine the association between a common class of infectious disease, soil-transmitted helminth worms, and nutritional status among youth living in communities that vary with respect to their distance from a commercial center. In 2007, anthropometric measurements and parasitological surveys were collected for 338 2–14-year-old children and adolescents living in lowland Bolivia as part of the Tsimane' Amazonian Panel Study. Associations between the presence of helminth infections and markers of both short- and long-term nutritional status were overall weak. Youth living in communities distant from the commercial center were more likely to be positive for multiple parasite species than youth in near communities, but youth in mid-distance communities had lower infection rates. This article demonstrates the challenge of identifying associations between nutritional and disease stress when individual and household factors are nested in a larger context of socioeconomic and environmental change. Increased collaboration between bioarchaeology and human biology should continue to examine the connections between stress and disease across time. Am J Phys Anthropol 155:221–228, 2014. © 2014 Wiley Periodicals, Inc.     

Bazar,Big Kites and Other Boys' Things: Distinctions of Gender and Tradition in Balinese Youth Culture

Balinese society is undergoing rapid change, but remains discursively situated in a ‘timeless’ ethos of cultural tradition. This tension can be observed in relation to the cultural activities of the island's young people, particularly the young men. The staging of bazar (neighbourhood fundraising parties), the making of ogoh‐ogoh (giant papier‐mâché effigies to mark Nyepi, the Balinese New Year) and the competitive flying of oversize kites are–despite their sometimes contentious reception from older generations—popularly dubbed as ‘traditional’ expressions of Balinese youth culture. This recourse to tradition must be viewed in relation to two pervasive discourses: that of adat (customary law) and ajeg (a new protectionist ethos in the discourse on Balinese cultural identity). This paper argues that in contemporary urban Bali, male youth culture finds its most visible expressions in relation to the abiding standards of established public ritual and the equally abiding gender divisions that serve to guarantee the reproduction of ‘traditional’ social life. Rather than fighting aggressively against the grown‐up norm, these expressions replicate the public culture of the adult world—while drawing on global and national youth styles—and strive towards the expression of a specifically ‘Balinese’ youth culture.     

A European project on health problems, mental disorders and cross-cultural aspects of developing effective rehabilitation procedures for refugee and immigrant youth

The present paper describes the conceptual framework, rationale and methods of an international comparative study on risk and protective factors of adolescent health and well-being, with particular focus on youth with immigrant (or refugee) experience. This is a comprehensive study on the quality of life and health outcomes of adolescent youth that looks at group-specific differences within different socio-cultural contexts across six European countries, including those of post-conflict communities. The research project combines both quantitative and qualitative methods, using a common set-up across all countries involved with the goal of collecting data on 3,500 adolescents that are strictly comparable to allow cross-country analyses. It is particularly aimed at increasing the understanding of acculturation processes of a particularly sensitive population of adolescent refugees and immigrants and of the influence that the interaction of contextual and developmental factors has on their mental health and psychological well-being.     

Midgut fungal and bacterial microbiota of Aedes triseriatus and Aedes japonicus shift in response to La Crosse virus infection

Understanding how midgut microbial communities of field‐collected mosquitoes interact with pathogens is critical for controlling vector infection and disease. We used 16S rRNA and internal transcribed spacer sequencing to characterize the midgut bacterial and fungal communities of adult females of Aedes triseriatus and Aedes japonicus collected as pupae in tree holes, plastic bins and waste tires and their response to La Crosse virus (LACV) infection. For both mosquito species and across all habitat and virus treatments, a total of 62 bacterial operational taxonomic units (OTUs) from six phyla and 21 fungal OTUs from two phyla were identified. The majority of bacterial (92%) and fungal (71%) OTUs were shared between the mosquito species; however, several OTUs were unique to each species. Bacterial and fungal communities of individuals that took either infectious or noninfectious bloodmeals were less diverse and more homogeneous compared to those of newly emerged adults. Interestingly, LACV‐infected A. triseriatus and A. japonicus had higher bacterial richness and lower fungal richness compared to individuals that took a noninfectious bloodmeal, suggesting that viral infection was associated with an increase in bacterial OTUs and a decrease in fungal OTUs. For both mosquito species, several OTUs were identified that had both high fidelity and specificity to mosquito midguts that were infected with LACV. Overall, these findings demonstrate that bacterial and fungal communities that reside in mosquito midguts respond to host diet and viral infection and could play a role in modulating vector susceptibility to LACV.     

Dance and early childhood cognition: The Isadora Effect

ABSTRACT

This article proposes the existence of an Isadora Effect: the propositions that motor development plays a primal role in brain development, and the first understanding of symbolic meaning among young children occurs from an understanding of movement and gesture. Anecdotal evidence for the past few decades has demonstrated that dance education and the early use of symbolic movement greatly enhance cognitive development in young children. The author presents (a) background and historical information about dance in early childhood in the United States; (b) research in which physical, emotional, and social development has served the backbone for rationalizing inclusion of dance in early education; (c) The Isadora Effect in early childhood dance education and its relationship to cognitive development, brain development, and intelligence; (d) the 21st Century Skills in relation to early childhood development and dance education; and (e) early childhood dance education and the National Core Arts Standards. The author makes three recommendations for improving the development of American youth relative to early childhood dance education: increased inclusion of creative movement and dance in early childhood curricula, scientific study by the pediatric and neurological communities to investigate effects of motor development and early symbolic movement on brain development and cognitive growth, and ways dance educators can communicate with policy makers about the kinds of support needed to make the first two recommendations a reality.     

Comparing Alternate Approaches to Calculating Reliability for Dichotomous Data: The Sample Case of Adolescent Selection,Optimization, and Compensation

With the growing interest in the development of purpose in youth, one important role that requires attention is the school teacher. The current article explores student perceptions of the role teachers can play in fostering purpose in their students in the mid- and late adolescent years, and the teacher competencies that facilitate purpose development. The present investigation posits and tests a structural model in which student perceptions of teacher support predicts youth purpose, mediated by student perceptions of teacher competencies; in turn, youth purpose predicts broader positive youth development. Two samples of demographically diverse young people ages 13–18 were surveyed in the United States (n = 381) and Finland (n = 336). Results showed support for the role of teachers in fostering purpose, and provided evidence for the hypothesized model with some cross-cultural differences. Implications of these findings for developing purpose in schools are discussed.     

Intraspecific and intergenerational differences in plant–soil feedbacks

Interactions between plant and soil communities are known to play an integral role in shaping ecosystems. Plants influence the composition of soil communities and soil communities in turn influence plant performance. Such a plant–soil feedback may incur selection pressure on plants and the associating soil community. However, the evolutionary consequences of these above–belowground feedback interactions remain largely speculative. Here we assess whether plant–soil feedback effects differ between intraspecific plant populations and between generations within the same plant population. We used two populations of Trifolium pratense and assessed their performance when grown in association with their home versus away soil biota. Both populations were colonized by distinct microbial communities and performed better with their own home soil communities than with the soil community from the other intraspecific population, demonstrating intraspecific positive feedback effects of home soil. In one of the two populations, we found that plant performance and the root associated microbiota community differed between parental and progeny plants when inoculated with their own home soil. Differences in root associated community characteristics could explain more than 80% of the variation in performance among the progeny and parental plants. Our results highlight that intraspecific differences in both plant and associated soil communities shape plant–soil feedback effects, and consequently indicate that plant–soil feedback can influence the direction of selection between intraspecific plant populations.     

Homing ability of young lemon sharks, <Emphasis Type="Italic">Negaprion brevirostris</Emphasis>

Synopsis We carried out the first experimental study testing an elasmobranchs ability to return home. We displaced juvenile lemon sharks,Negaprion brevirostris, 4–16 km from their observed home ranges at Bimini Islands, Bahamas during daylight and at night. We tracked all sharks except one back to the Bimini Islands and most returned to their home ranges observed before displacement. Even sharks displaced to a site closer to another island with suitable habitat for young lemon sharks returned to their home ranges at Bimini Islands. Sharks displayed a preferred compass direction (PCD) toward the east as their first swimming direction after release, suggesting an innate sense of direction. This bearing was followed shortly afterwards by a home-oriented direction. Swimming speeds prior to reaching shore were approximately twice as fast than the usual cruising speed reported for juvenile lemon sharks. The return of young (0–2 years), inexperienced sharks to their original home range indicate high site fidelity and an ability to home.     

Between Myth and Madness: The Premigration Dream of Leaving Among Young Somali Refugees

Many young Somali refugees experience long premigration waits and a poorly delimited transition period in a succession of countries before reaching their final destination. During this difficult passage, a myth dealing with departure and exodus is collectively constructed, and it serves as a dynamic, mobilizing dream that orients individual strategies. This substitution of 'dream travel' for real travel during the transition period, especially if it is prolonged, may cause Somali youths to lose contact with reality and eventually to slide into madness. The authors' approach is based on three assumptions: (a) that pastoralism predisposes the Somali to value travel as a way of maturing, (b) that age-based peer groups create special migratory dynamics, and (c) that an ethic of solidarity involves many people in the adventure of a migrant youth. When trapped in an indefinite transition period, young men share khat-chewing sessions during which they relate success stories and dreams of leaving. Many grow frustrated with the delay, and if their departure plans fall through, the 'dream trip' often becomes 'dream madness.' Actual cases illustrate how some young Somali get lost in their dreams. A young Somali's vulnerability is heightened when he extricates himself from the system of reciprocal obligations or when the liminal stage ends with the mourning of the impossible dream. In the universe of madness visited by some young Somali migrants, the boundaries between the real and the imaginary are poorly marked. The paper is based on fieldwork carried out in the Horn of Africa and in Canada, interviews with Somali immigrants and members of the community, and clinical psychiatric data collected in Montreal.     

Can the Introduction of Modern Crop Varieties in their Centre of Origin Affect Local Ecological Knowledge? A Case Study of Papaya in the Yucatan Peninsula

The effect on local ecological knowledge (LEK) of introducing modern crop varieties in their centre of origin has been generally overlooked. LEK of the reproductive ecology of cultivated and wild papaya was assessed in a Mayan community using questionnaires, in-depth interviews, and participant observation. Although the Maya have managed the wild variety of papaya for several centuries, there was more LEK of the recently introduced maradol variety. Most informants were unable to differentiate male and female plants, likely because the most common variety (maradol) in contemporary home gardens is typically hermaphroditic. Informants also mentioned that, in the past, sexual expression was manipulated. We conclude that the introduction of the maradol variety has contributed to the erosion of LEK of the reproductive ecology of papaya.     

Are Child Eating Patterns Being Transformed Globally?

Objective: To examine the extent to which child dietary patterns and trends are changing globally. Research Methods and Procedures: Diets of children 2 to 19 years of age were studied with nationally representative data from Russia and the United States, nationwide data from China, and regional data from metropolitan Cebu, Philippines. Twenty‐four‐hour dietary recalls were examined at several points in time to examine trends in calories consumed away from home, snacking behavior, and soft drink and modern fast food consumption. Urban—rural trends were compared. Results: U.S. and Cebu youth consume more than one‐third of their daily calories and a higher proportion of snack calories from foods prepared away from home. In contrast, away from home food consumption is minimal in Chinese and Russian children. U.S. and Cebu youth consume about one‐fifth of their total daily energy from snacks, but snacks provide a much lower proportion of energy in Russia (～16%) and China (where snacks provide only ～1% of energy). Fast food plays a much more dominant role in the American diet (～20% of energy vs. 2% to 7% in the other countries), but as yet does not contribute substantially to children's diets in the other countries. Urban—rural differences were found to be important, but narrowing over time, for China and Cebu, whereas they are widening for Russia. Discussion: This research suggests that globalization of the fast food and other modern food sectors is beginning to affect child eating patterns in several countries undergoing nutrition transition. However, the contribution of fast food and soft drinks to the diet of children remains relatively small in China, Russia, and Cebu, Philippines, relative to the United States.