Craniometric variation of the Ainu: an assessment of differential gene flow from northeast Asia into northern Japan, Hokkaido

In and after the latest Neolithic period in Japan (approximately B.P. 2,300 years), there were two distinct waves of migration from eastern Asia. One is well known as successive episodes in which indigenous inhabitants of main-island Japan were intruded on by new arrivals with advanced technology, and of a different genetic stock. Another migration of people and culture, identified as the Okhotsk culture, reached the northeastern part of Hokkaido. As opposed to main-island Japan, the morphological continuity from the Neolithic to recent inhabitants in Hokkaido (Ainu) is notable, so that the evidence of admixture easily could have escaped notice. In this study, the effects of gene flow from an outside source on the pattern of among-group variation of Hokkaido Ainu are examined by means of two models. One is the R-matrix model comparing observed and expected craniometric variation for estimating differential external gene flow into a region. The other is a simple simulation model that estimates admixture in a population with two parental populations. The two approaches give similar results. The results suggest the possibility of admixture between the migrants from Northeast Asia, the Okhotsk culture people, and the indigenous inhabitants in Hokkaido during the 5th to 12th centuries A.D., at least in northeastern Hokkaido. Such gene flow may have a certain degree of effect on the genetic structure of recent Ainu. The findings further suggest morphological heterogeneity in Northeast Asia during the Holocene that has relevance for understanding the morphological heterogeneity seen through time in the New World.     

External auditory exostosis in prehistoric Chilean populations: A test of the cold water hypothesis

Over one thousand prehistoric crania (n = 1,149) from northern Chile were analyzed to determine if the presence of external auditory exostosis (EAE) was a type of subsistence-induced pathology, a consequence of habitual fishing i the cold water of the Pacific Ocean, rather than genetically determined. To test this occupational hypothesis, the sample was divided according to chronology, type of economy, site elevation, and sex. The crania came from 43 sites, including the coast, lowland valleys (100–2,000 m), and highlands (2,000 to 4,000 m) with a time frame of 7,000 B.C. to the Inca era (1500 A.D.). There was a significant association between EAE, environment, and sex. The coastal inhabitants had the highest prevalence of EAE with 30.7% (103/336), followed by 2.3% (6/264) for the valley people and 0% (0/549) for highlanders. Coastal and valley men were significantly more affected than their female counterparts. Contrary to expectations, there was nonsignificant association between EAE and economy and/or chronology. In the Arica area, the early Chinchorro fishers, without agriculture, had 27.7% (26/94) EAE, the subsequent agro-pastoralists, 42.7% (32/75), and the late Arican agro-pastoral fishers had 35.6% (36/101) EAE. Apparently, with the advent of agriculture, the coastal Arican populations increased their ocean harvests, rather than decreased them, to gain a surplus in order to trade with nonmaritime groups. Am J Phys Anthropol 103:119–129, 1997. © 1997 Wiley-Liss, Inc.     

Brief communication: physiological stress in the Florida Archaic-enamel hypoplasia and patterns of developmental insult in early North American hunter-gatherers

We examined the prevalence and developmental timing of linear enamel hypoplasias (LEHs) in an early Archaic Floridian population from Windover (8,120-6,980 (14)C years B.P. uncorrected). Using digital images, mandibular and maxillary canines were analyzed for defect prevalence and timing of insults. Although overall prevalence was very weakly correlated with earlier defect timing, there were significant differences in defect prevalence that varied by sex and tooth type. The mean LEH count in male mandibular canines was far higher than in male maxillary canines or in female mandibular or maxillary canines. We examined defect timing as a possible predictor of the sex differences in LEH prevalence. There were no significant sex differences in the developmental timing of the earliest defects in either tooth class. Developmental timing is not responsible for the sex differences seen in defect prevalence in mandibular canines.     

Oral health and the postcontact adaptive transition: A contextual reconstruction of diet in Mórrope,Peru

This work explores the effects of European contact on Andean foodways in the Lambayeque Valley Complex, north coast Peru. We test the hypothesis that Spanish colonization negatively impacted indigenous diet. Diachronic relationships of oral health were examined from the dentitions of 203 late‐pre‐Hispanic and 175 colonial‐period Mochica individuals from Mórrope, Lambayeque, to include observations of dental caries, antemortem tooth loss, alveolar inflammation, dental calculus, periodontitis, and dental wear. G‐tests and odds ratio analyses across six age classes indicate a range of statistically significant postcontact increases in dental caries, antemortem tooth loss, and dental calculus prevalence. These findings are associated with ethnohistoric contexts that point to colonial‐era economic reorganization which restricted access to multiple traditional food sources. We infer that oral health changes reflect creative Mochica cultural adjustments to dietary shortfalls through the consumption of a greater proportion of dietary carbohydrates. Simultaneously, independent skeletal indicators of biological stress suggest that these adjustments bore a cost in increased nutritional stress. Oral health appears to have been systematically worse among colonial women. We rule out an underlying biological cause (female fertility variation) and suggest that the establishment of European gender ideologies and divisions of labor possibly exposed colonial Mochica women to a more cariogenic diet. Overall, dietary change in Mórrope appears shaped by local responses to a convergence of colonial Spanish economic agendas, landscape transformation, and social changes during the postcontact transition in northern Peru. These findings also further the understandings of dietary and biocultural histories of the Western Hemisphere. Am J Phys Anthropol 2010. © 2009 Wiley‐Liss, Inc.     

Dimensions of health and social structure in the early intermediate period cemetery at Villa El Salvador, Peru

This paper examines relationships between the social structure of a community and the health of its members, based on analysis of human skeletal remains (N = 64) from Villa El Salvador XII (100 BC-AD 100), a prehistoric cemetery located in the lower Lurín Valley, Peru. The ambiguity of social status as conventionally inferred from archaeological context is among the principal complicating factors in such an inquiry. We use multidimensional scaling of skeletal markers to identify the presence of patterned health-based heterogeneity in our sample, without making a priori assumptions about underlying social structure at Villa El Salvador. This procedure situates every skeleton relative to all others in the sample on the basis of multiple health markers, eliciting health groups. Once recognized, the relevance of those groups to social structure can be evaluated by comparison with a broad range of presumptive archaeological status indicators. We test the hypothesis that the distribution of stress indicators in human skeletons covaries with archaeological indicators of social differentiation. Based on multivariate analysis of skeletal indicators, we conclude that the cemetery at Villa El Salvador was utilized by two social groups with different geographic affinities: one of local coastal origin, and the other probably from the upper Lurín Valley or adjacent higher altitudes. These groups differ in skeletal characteristics related to childhood health, probably reflecting systematic contrasts in the growth environments of the studied individuals. This same division is independently supported by the distribution of cranial deformation, a possible marker of ethnicity. We also document some inequality in the distribution of labor among male individuals, as reflected by the relative advancement of degenerative joint disease, and congruent with differences in the number and quality of associated funerary offerings.     

Intra-population variation in anemia status and its relationship to economic status and self-perceived health in the Mexican Family Life Survey: Implications for bioarchaeology

Recently scholars have advocated for the use of a critical biocultural approach in bioarchaeology, where osteological and dental markers of stress are used to understand the broader biosocial context of past populations. However, the ability to accomplish this task rests on the assumption that ultimate-level environmental stressors and well-being in the past can be reconstructed from the prevalence of pathologies in skeletal collections. Here we test this assumption using anemia prevalence in the Mexican Family Life Survey. Specifically we test three hypotheses: (1) that individuals sharing the same household are more likely to share anemia status; (2) anemia status is a predictor of economic status (a common proxy for broader environmental context); and (3) anemia status is related to self-rated health. Results demonstrate that: anemia status was not commonly shared between household members; there was a significant overlap in economic status between anemic and nonanemic individuals (i.e., anemia poorly predicted economic status) and; while anemia status was associated with self-perceived health, the majority of those who reported poor health were nonanemic while a significant number of those who reported very good health were anemic. We argue that these findings are likely related to variation in individual frailty, which is shaped by biological and cultural risk factors. Therefore, we advocate for greater incorporation of individual frailty into bioarchaeological investigations, and, in effort to overcome some of the difficulties associated with this task, increased use of data from living populations and greater collaboration between bioarchaeologists and human biologists. Am J Phys Anthropol 155:210–220, 2014. © 2014 Wiley Periodicals, Inc.     

Technical note: comparison of the Maresh reference data with the who international standard for normal growth in healthy children

The Maresh reference data on stature and long bone lengths in a sample of healthy middle-class children from Denver, Colorado [Maresh: Am J Dis Child 66 (1943) 227-257; Maresh: Am J Dis Child 89 (1955) 725-742; Maresh: Human growth and development (1970) p 155-200], have been used extensively by biological anthropologists to estimate juvenile age and body size using skeletal elements and to assess growth in skeletal series from different ethnic populations or archaeological cultural groups. How well these data reflect the potentially diverse growth patterns of healthy human populations from different geographic areas is unknown. Similarly, the efficacy of using the Maresh reference data to estimate stunting prevalence in prehistoric populations is unknown. This report presents the results from a comparison of the Maresh data on supine length and standing height to the World Health Organization (WHO) international child growth standard. The WHO growth standard is meant to depict typical human growth under optimal conditions and can be used to assess children worldwide, regardless of ethnicity and socioeconomic status. The results from this comparison indicate that although the Maresh reference data generally conform to the WHO standard, reflecting a normal human growth pattern, and therefore serve as a suitable reference for comparative studies of growth patterns, these reference data are not suitable for estimating stunting prevalence.     

Regional Maritime Regime Building: Prospects in Northeast and Southeast Asia

Maritime issues are rising to the forefront of Asian security concerns. But maritime management regimes can constrain conflict and create confidence in co-operation. Such regimes can define the range of permissible state behavior and resolve dilemmas stemming from the sharing of common resources. Regimes originate through imposition, spontaneous processes, or negotiation and are supplied when there is sufficient demand for the functions they perform. Integrative forces that support regime formation are the existence of other international arrangements in the region; ethnic, cultural, or historical interstate relationships; and clear indications of benefits to be gained. Often a shock or crisis enhances regime formation or its robustness. Disintegrative forces include political or territorial differences, competition for leadership, and opposition to regionalism. In regional co-operation on maritime issues, Southeast Asia is clearly more advanced than Northeast Asia. However, the absence of robust multilateral maritime regimes in Asia reflects state perceptions that the costs outweigh the benefits. The primacy of dis-integrative factors argues strongly for an ad hoc, issue-specific, evolutionary process for multilateral maritime regime building in Asia.     

大学生口腔保健知识态度行为调查与研究

目的:评价大学生口腔保健知识、态度、行为情况,为实施口腔健康指导计划提供基线资料。方法:采用随机抽样的方法,对314名青岛大学新生进行了口腔保健知识、态度、行为的问卷调查;其中男生151名,占总数的48%,女生163名,占总数的52%。结果:大学生对龋病知识的知晓率高,但牙周知识及牙周状况差。大学生认为定时拜访牙医有助于口腔疾病预防,口腔健康与全身健康密切相关,但约一半学生害怕就医或推迟就医。只有55.7%的大学生一天刷牙两次,25.5%的大学生没有接受过专业刷牙指导。在口腔保健知识、态度及行为方面,女生优于男生。结论:大学生缺乏牙周方面基础口腔保健知识,缺少专业的口腔卫生指导。结构合理的口腔健康教育系统亟需实施。     

Extending the Boundaries,Bridging the Gaps: Crafting Mental Health: Culture,Race, and Ethnicity,a Supplement to the Surgeon General's Report on Mental Health

The August 2001 issuance of Mental Health: Culture, Race, and Ethnicity--A Supplement to Mental Health: A Report of the Surgeon General, represents a landmark in the dialogue--political and scientific--regarding health disparities in the United States. This paper offers a critical appraisal of the process and structure of generating these reports, paying particular attention to issues that marked serious epistemological tensions among the participants. These issues revolved around the relative emphasis placed on (1) mental illness and mental health; (2) risk, etiology, and treatment versus prevention and promotion; (3) large-scale, population-based surveys and randomized clinical trials as the standard bearers of scientific evidence; (4) variation related to gender, social class, and culture; (5) ethnicity and culture as dispositional variables or individual glosses as opposed to dynamic, collective phenomena; and (6) the historical forces that shaped the contemporary context for much of this discussion. It describes the sometimes subtle, other times stark differences in assumptions and experience that sprang from disciplinary orientations, investigative methods, institutional affiliations, and personal histories and agendas.     

Trauma and violence in the Wari empire of the Peruvian Andes: warfare, raids, and ritual fights

This study examines bioarchaeological evidence for violence during the period of Wari imperialism in the Peruvian Andes through analysis of skeletal trauma from three populations dating to AD 650-800. The samples are from contemporaneous archaeological sites: Conchopata, a Wari heartland site in central highland Peru; Beringa, a community of commoners in the Majes valley of the southern Wari hinterland; and La Real, a high status mortuary site, also in the Majes valley. Given the expansionist nature of Wari and its military-related iconography and weaponry, it is hypothesized that Wari imperialism was concomitant with greater levels of violence relative to other prehispanic groups in the Andes. It is also hypothesized that differential articulation with the Wari empire (e.g., heartland vs. hinterland groups) affected the frequency and patterning of trauma. Results show that cranial trauma frequency of the three Wari era samples is significantly greater than several other Andean skeletal populations. This suggests that Wari rule was associated with high levels of violence, though it may not have always been related to militarism. The three adult samples show similar frequencies of cranial trauma (Conchopata = 26%; Beringa = 33%; La Real = 31%). This may suggest that differential positioning in the Wari empire had little effect on exposure to violence. Sex-based differences in cranial trauma frequencies are present only at La Real, but wound patterning differs between the sexes: females display more wounds on the posterior of the cranium, while males show more on the anterior. These data suggest that Wari rule may have contributed to violence.     

不同气候适应类型果蝇体色黑化可塑性的适应性变化(英文)

变温昆虫果蝇Drosophila深受热选择（即遗传效应）或表型诱导效应（即可塑性）的影响。表型可塑性是不同生物进行适应的有效方法, 但是它在不同的果蝇种中较少受到关注。 我们分析了不同发育温度范围和地理分布的果蝇的黑化反应模式。嗜凤梨果蝇D. ananassae 和蒲桃果蝇D. jambulina 对低温敏感, 这些物种可在18~32℃下饲育。相反, D. nepalensis 为耐冷且对热敏感的物种, 可在12~25℃下饲育。世界广为分布的黑腹果蝇D. melanogaster的温度范围宽（13~31℃）, 该物种前3个腹节和后3个腹节的黑化反应模式未见明显差异。D. nepalensis的全部6个腹节（第2~7节）均具有高度的可塑性。不过, 黑腹果蝇D. melanogaster只有后3个腹节具有可塑性。相反, 热带物种嗜凤梨果蝇D. ananassae 的所有腹节均不具有可塑性。世界广为分布的黑腹果蝇, 即使来自冷得多的气候环境, 其体色也不加深, 与D. nepalensis中观察到的体色接近。本研究的目的旨在认识引起体色的形态多样性的过程以及果蝇对不同地理区域的适应性。最后, 将体色黑化与物种系统发育谱系的比较表明, 在不同的演化谱系中不断发生遗传多态性或表型可塑性两种不同模式的适应。     

Coral in Alaska: distribution,abundance, and species associations

To help identify fishery management actions that minimize the adverse impacts of fishing activities on corals in Alaska, the distribution and abundance of corals were analyzed based on trawl survey data collected during 1975–1998. We also examined the species of commercially managed fish that are associated with coral. Soft corals, primarily Gersemia sp. (=Eunephthya sp.), were the most frequently encountered corals in the Bering Sea. In the Aleutian Islands gorgonian corals, primarily in the genera Callogorgia, Primnoa, Paragorgia, Thouarella, and Arthrogorgia were the most common corals. In the Gulf of Alaska, gorgonian corals, primarily in the genera Callogorgia and Primnoa, and cup corals, primarily `Scleractinia unidentified', occurred most frequently. The Aleutian Islands area appears to have the highest abundance and diversity of corals. Some fish groups are associated with particular types of coral. Rockfish (Sebastes spp. and Sebastolobus alascanus) and Atka mackerel (Pleurogrammus monopterygius) were the most common fish captured with gorgonian, cup, and hydrocorals, whereas flatfish and gadids were the most common fish captured with soft corals.