bluuebunny/crossref_metadata_2025 huggingface dataset:
On the genetic interrelationships of South African Negroes
Authors: Hitzeroth H. W.
Published: August 2005

This study addresses the comparative genetic interrelationships between South African Negro groups. For this the genetic distances between seven ethnically defined Negro subsamples (total of 998 individuals) based on 24 genetic loci/polymorphisms are calculated by applying standard distance formulae. These computations offer an opportunity to evaluate the different polymorphisms in terms of their effects on the genetic distances. The genetic interrelationships thus computed are illustrated by way of dendrograms and are discussed in terms of their comparative significance. It follows from the findings that the Ndebele, Northern Sotho (Pedi), and Tswana form a closely related subcluster and that the Zulu and Swazi as well as the Venda and Shangana‐Tsonga form two additional, more distant, subclusters. These results are discussed and tentatively interpreted against the background of the reported Khoisan admixture of the populations concerned as well as their ethnological history. The data are also compared to those derived from metric and dermatoglyphic studies. It is concluded that whereas there is some agreement between these categories of variation (genetic, metric, and dermatoglyphic) as far as the comparative evaluation of South African Negro groups is concerned, there also are discrepancies. These conclusions need to be explained in terms of evolutionary mechanisms (such as historic origins, hybridization, natural selection, and genetic drift) in order to obtain a more consistent and comprehensive comparative picture of the physical anthropology of southern African populations.
Dimensional and discrete dental trait asymmetry relationships
Authors: Mayhall John T. , Saunders Shelley R.
Published: August 2005

Inuit (Eskimos) from the Foxe Basin region of the Northwest Territories, Canada, were studied to ascertain the amount of dimensional and morphological asymmetry in their dentitions. The results indicate that dimensional asymmetry does not appear to be greater on either the maxillary or mandibular teeth. Both types of asymmetry show partial conformity to the model of tooth fields with an increasing amount of asymmetry as one goes distally in each tooth group. The morphological asymmetry exception, the mandibular incisors, follows Dahlberg's “Field Concept.” Rank‐order correlations between the amount of dimensional asymmetry and morphological asymmetry reveal no detectable patterns. There appear to be no associations between the presence or absence of morphological asymmetry and the size of the tooth. This lack of association might be explained by differences in developmental timing of tooth dimensions and morphological traits; however, such a hypothesis requires experimental testing. In this population and those for which published results are available, it is practically impossible to overcome the “noise” level and test recent hypotheses regarding random dental asymmetry.
Age determination of the male Os pubis
Authors: Katz Darryl , Suchey Judy Myers
Published: August 2005

An extensive (n = 739) sample of well‐documented male pubic bones was examined for age‐related features. Using the traditional aging methods, Todd's system was found to over‐age and both the Todd and the McKern‐Stewart systems did not account for age variability seen in advanced pubic bone patterns. Based on a 5‐year interobserver error study, certain categories in each system were collapsed because observers could not consistently differentiate between them by morphological pattern. The traditional and the modified versions were then analyzed using linear regression analysis. All approaches perform poorly when the entire sample is used. Truncation strategies to eliminate older individuals result in substantial improvement. The traditional Todd system and its modified form are found to be the best systems. When implementation is considered, a modified Todd six‐phase system is recommended.
A biomechanical analysis of mandibular scaling in old world monkeys
Authors: Bouvier Marianne
Published: August 2005

Scaling of mandibular dimensions in male Old World monkeys was investigated. Mandibular condyle length, width, and area were regressed separately against body mass and mandibular length for a total of 14 species of Cercopithecoids. Scaling of mandibular depth and width against both body mass and mandibular length were also investigated.

When results of regression analysis using the two different independent variables (body mass and mandibular length) were compared, there were significant pattern differences in scaling of cercopithecines versus colobines. Compared to body mass, male cercopithecines had relatively large mandibles (length, width, and depth) and also relatively large condyles (length, width, and area). However, compared to mandibular length, cercopithecines had relatively transversely thin and shallow mandibles and relatively narrow condyles.

It is shown that a “biomechanical” interpretation of mandibular scaling patterns against body mass in Old World monkeys demonstrates only that cercopithecines have prognathic faces, an already well‐known and well‐documented condition. When the biomechanical effects of prognathic faces are controlled for (by scaling against mandibular length), it is shown that cercopithecines possess special adaptations in condyle length while colobines possess special adaptations in condyle width and mandibular depth and width. These results clearly demonstrate the importance of selecting a relevant reference variable in scaling studies where biomechanical interpretations are attempted.
Mandibular symphysis (medial suture) closure in modern Homo sapiens: Preliminary evidence from archaeological populations
Authors: Becker Marshall Joseph
Published: August 2005

Four archaeologically derived populations of human infants provide evidence for age at closure of the mandibular suture. These data suggest fusion by 7–8 months of age, with a range from 6 to 9 months. This provides a useful tool for age identification of the remains of young children recovered from archaeological and other contexts.
Cut marks on the Bodo cranium: A case of prehistoric defleshing
Authors: White Tim D.
Published: August 2005

Cut marks were discovered on the Middle Pleistocene Bodo cranium from Ethiopia. The cut marks most closely resemble experimental damage caused by the application of stone tools to fresh bone. This discovery constitutes the earliest solid evidence for intentional defleshing of a human ancestor and offers new research avenues for the investigation of early hominid mortuary practices.
Socioeconomic status, sex, age, and ethnicity as determinants of body fat distribution for Guatemalan children
Authors: Bogin Barry , Sullivan Timothy
Published: August 2005

The distribution of subcutaneous fat at the triceps and subscapular skinfold sites is described for four groups of children living in Guatemala. These groups are (1) high socioeconomic status (SES) children of Ladino (mixed Spanish and Indian) ancestry, (2) high SES children of European ancestry, (3) low SES Ladino children, and (4) very low SES Indian children. The method of Healy and Tanner (1981) is used, employing regression and principal components analysis of log transformed skinfold values to divide “fatness” into two uncorrelated variables: size (amount of fat) and shape (fat pattern). Significant differences exist between groups in size, with lower SES groups having less fat than higher SES groups. No significant difference in fat pattern exists between the high SES Ladino and high SES European children. Significant differences do exist between the high SES groups and the low SES groups. The relative amount of subscapular fat increases from the high SES Ladinos and high SES Europeans, to the low SES Ladinos, to the very low SES Indians. In the high SES European and high SES Ladino samples, girls have significantly more arm fat than boys. There is no significant difference in fat patterning between boys and girls in the two low SES samples. Finally, the relative amount of subscapular fat tends to increase with age in all four samples. These results indicate that (1) fatness and fat patterning are independent anatomical characteristics, (2) SES influences fat patterning; low SES children of both Ladino and Indian ancestry show greater reductions in arm fat than in trunk fat compared to high SES children, (3) sexual dimorphism in fat patterning is SES dependent; low SES children show no dimorphism, high SES children are dimorphic, (4) ethnic differences in fat patterning are not demonstrable for Ladinos and Europeans of high SES; fat distribution differences between low SES Ladinos and very low SES Indians may be due to ethnic factors, SES differences, or both.
Perinatal mortality at pre‐Columbian Teotihuacan
Authors: Storey Rebecca
Published: August 2005

The skeletal population of 166 individuals from a low‐status apartment compound of the pre‐Columbian city of Teotihuacan contained 52 perinatal individuals. The most perilous time of the lifespan was around birth, as revealed by life table analysis. Femur length was not increasing during the last month of gestation, and individuals were probably shorter somatically at birth than modern standards or historic‐period Arikara skeletal controls. The possibility of intrauterine growth retardation is investigated through paleopathological indicators of prenatal growth arrest. The evidence of prenatal stress and the high rate of mortality at birth seem to indicate that this New World preindustrial urban population faced similar health and nutritional stresses as Old World preindustrial cities.
Prevalence and age at development of enamel hypoplasias in Mexican children
Authors: Goodman Alan H. , Allen Lindsay H. , Hernandez Gabriela P. , Amador Alicia , Arriola Luis V. , Chávez Adolfo , Pelto Gretel H.
Published: August 2005

Enamel hypoplasias, deficiencies in enamel thickness resulting from disturbances during the secretory phase of enamel development, are generally believed to result from nonspecific metabolic and nutritional disruptions. However, data are scarce on the prevalence and chronological distribution of hypoplasias in populations experiencing mild to moderate malnutrition. The purpose of this article is to present baseline data on the prevalences and chronological distributions of enamel hypoplasias, by sex and for all deciduous and permanent anterior teeth, in 300 5 to 15‐year‐old rural Mexican children.

Identification of hypoplasias was aided by comparison to a published standard (Federation Dentaire Internationale: Int. Dent. J. 32(2):159−167, 1982). The location of defects, by transverse sixths of tooth crowns, was used to construct distributions of defects by age at development.

One or more hypoplasias were detected in 46.7% (95% CI= 40.9−52.5%) of children. Among the unworn and completely erupted teeth, the highest prevalence of defects was found on the permanent maxillary central incisors (44.4% with one or more hypoplasias), followed by the permanent maxillary canine (28.0%) and the remaining permanent teeth (26.2 to 22.2%) Only 6.1% of the completely erupted and unworn deciduous teeth were hypoplastic. The prevalence of enamel defects on the permanent teeth was up to tenfold greater than that found in studies of less marginal populations that used the FDI method.

The prevalence of defects in transverse zones suggests a peak frequency of hypoplasias during the second and third years for the permanent teeth, corresponding to the age at weaning in this group. In the deciduous teeth, a smaller peak occurs between 30 and 40 weeks post gestation. The frequency of defects after three years of age is slightly higher in females than males, suggesting a sex difference in access to critical resources.
Principal components analysis of physical growth in savannah baboons
Authors: Glassman David M. , Coelho Anthony M.
Published: August 2005

Morphometric data collected from 118 male and 169 female savannah baboons (Papio cynocephalus anubis) aged between birth and 5.5 years were analyzed to describe the morphology and physical growth of this species. Measurements included weight, crown‐rump length, triceps circumference, and skinfolds at the neck, subscapular, suprailiac, and triceps anatomical sites. Principal components analyses were applied to the data to provide multivariate assessments of morphological patterning among the variables. These analyses resulted in the extraction of two unrotated orthogonal components that accounted for 88% of the overall sample variation. The first component accounted for 77% of the variation and represents an axis of overall body size. The second component represents an axis of shape variation that contrasts body size with fat patterning, and was interpreted as a measure of body leanness. Individual component scores were computed for determining age, gender, and age‐by‐gender interaction effects. Both components were found to be age dependent for both genders. Males and females shared similar age patterning along the two components; however, gender differences did occur in the timing and intensity of the age‐related patterning, particularly with respect to leanness. The multivariate measure of overall body size increased for both genders similarly with advancing age. Age patterning along the leanness component was described as a decrease from birth to 1 year, followed by an increase in leanness in older ages. Females had a delayed and significantly less intense increase in leanness relative to males.
Effects of maternal food restriction during lactation on craniofacial growth in weanling rats
Authors: Pucciarelli Héctor M. , Oyhenart Evelia E.
Published: August 2005

Adult Holtzman rats were submitted during suckling period to a food restriction with or without protein or carbohydrate restoration. Twenty‐one‐day‐old weanling pups were compared with controls of 9, 13, 17, and 21 days of age. Lateral craniofacial roentgenographies were taken. The length in midsagittal plane of each bone and its angle with respect to the vestibular line were measured in males. In females, the brain and the left masseter muscle were weighed, and the muscle/brain ratios (neuromuscular index) were calculated. Food restriction altered skull size and shape. Size changes were due to arrested lengths in all studied skull bones. Shape variation was evident by orthocephalization changes, reflected in angulation changes of bones belonging to the frontoethmofacial (frontal, nasal, and maxillary bones) and to the occipitointerparietal (interparietal bone) complexes. Partial restorations by both protein or carbohydrate supplementation were found. Nutritional stresses during lactation affected orthocephalization through an altered growth ratio between two soft tissues functionally associated to the craniofacial complex: brain and masticatory muscles.
Gene differentiation at the ABO locus in twenty castes and twenty‐two tribes of Andhra Pradesh, India
Authors: Rajanikumari J. , Srikumari C. R.
Published: August 2005

Using gene frequency data for the ABO locus so far available, gene differentiation and gene identity between 20 castes and 22 tribes of Andhra Pradesh were determined. The interpopulation gene diversity is 1.4 and 1.6% of total genic variation in castes and tribes, respectively. Difficulties in interpreting genetic diversity using just one genetic system is discussed.
Stride length and its determinants in humans, early hominids, primates, and mammals
Authors: Reynolds Thomas R.
Published: August 2005

Primate stride lengths during quadrupedal locomotion are very long when compared to those of nonprimate quadrupedal mammals at the speed of trot/gallop transition. These exceptional lengths are a consequence of the relatively long limbs of primates and the large angular excursions of their limbs during quadrupedalism. When quadrupedal primates employ bipedal gaits they exhibit much lower angular excursions. Consequently their bipedal stride lengths do not appear to be exceptional in length when compared to other mammals. Angular excursions of the lower limbs of modern humans are not exceptionally large. However, when running, humans exhibit relatively long periods of flight (i.e., they have low duty factors) when compared to other mammals including primates. Because of these long periods of flight and their relative long lower limbs, humans have running stride lengths that are at the lower end of the range of stride lengths of quadrupedal primates. The stride length of the Laetoli hominid trails are evaluated in this context.
Relationships between growth at the sutures of the rabbit calvarium
Authors: Isberg Per Alberius , Isberg Per‐Erik
Published: August 2005

The present study was designed to elucidate the relationships between growth increments at the cranial vault sutures in rabbits. Thirteen male New Zealand white rabbits were followed regularly from age 31 to 142 days using a roentgen stereophotogrammetric system. Spherical tantalum markers were implanted into the nasal, frontal, and parietal bones, and implant stability was checked at each stereo examination. Problems with instability were encountered only in the nasal bones. Registered growth rates conformed to our previous investigations. High correlations were observed between the following areas; the coronal suture to the frontonasal suture, the first principal component of the neurocranial suture group to the frontonasal suture, and the principal component of the craniofacial suture group to the coronal suture. Remaining relationships demonstrated dispersion to various extents. The findings indicate that there seems to exist a basic mutual dependence between neural and facial skeletal growth, as well as complex covariations between the various sutures of the rabbit calvarium.
Relative reliability of circumferences and skinfolds as measures of body fat distribution
Authors: Mueller William H. , Malina Robert M.
Published: August 2005

The question has arisen whether patterns of body fat distribution can be identified by body circumferences, a method which is said to be more reliable and simpler than skinfold thickness or like measures of subcutaneous fat (Ashwell et al., Int. J. Obes. 6:143–152, 1982). Here we address the question of whether body circumferences are inherently more reliable than skinfold thicknesses in 77 intra‐ and 224 interexaminer replicates from the Health Examination Survey of 12 to 17‐year‐olds in the U.S.A. Reliability of six body circumferences (0.96) was significantly (P <.01) higher than that of skinfold thicknesses at five sites (0.91), suggesting that circumferences are a more reliable method. However, the reliability of skinfolds is still high, and skinfolds may be used in studies which focus on preadults or other groups in which the validity of circumferences as measures of body fat distribution is unknown.
Upper pleistocene fossil hominids from Sri Lanka
Authors: Kennedy Kenneth A. R. , Deraniyagala Siran U. , Roertgen William J. , Chiment John , Disotell Todd
Published: August 2005

Between 1978 and 1983 hominid skeletal remains were collected from the cave sites of Batadomba lena and Beli lena Kitulgala in Sri Lanka (formerly Ceylon). These are the most ancient specimens of anatomically modern Homo sapiens found thus far in South Asia, radiocarbon dates placing them in the Upper Pleistocene. Morphometric analysis of the remains of some 38 individuals from the two sites indicates that these populations were characterized by medium stature, moderate to pronounced cranial and postcranial robusticity, medium‐size permanent tooth crown measurements, prognathic alveolar facial proportions, and low incidence of osseous and dental pathological conditions. Comparisons of these ancient Sri Lankans with other prehistoric skeletal series from South Asia and elsewhere support the hypothesis that muscular‐skeletal robusticity was a significant physical adaptation of earlier hunting‐foraging populations. A trend towards reduction of sexual dimorphism and development of more gracile body form and smaller teeth appears to have accelerated with the socioeconomic transition to food‐production strategies involving agriculture and pastoralism and refinement of technologies for food procurement and preparation, as documented by morphometric studies of later prehistoric inhabitants of South Asia.
Hominid footprints at laetoli: Facts and interpretations
Authors: White Tim D. , Suwa Gen
Published: August 2005

The history of discovery and interpretation of primate footprints at the site of Laetoli in northern Tanzania is reviewed. An analysis of the geological context of these tracks is provided. The hominid tracks in Tuff 7 at Site G in the Garusi River Valley demonstrate bipedality at a mid‐Pliocene datum. Comparison of these tracks and the Hadar hominid foot fossils by Tuttle has led him to conclude that Australopithecus afarensis did not make the Tanzanian prints and that a more derived form of hominid is therefore indicated at Laetoli. An alternative interpretation has been offered by Stern and Susman who posit a conforming “transitional morphology” in both the Tanzanian prints and the Ethiopian bones. The present study examines both hypotheses and shows that neither is likely to be entirely correct. To illustrate this point, a reconstruction of the foot skeleton of a female A. afarensis is undertaken, and the results are compared to the Laetoli tracks. We conclude that A. afarensis represents the best candidate for the maker of the Laetoli hominid trails.
The effect of geochemical factors on prevalences of dental diseases for prehistoric inhabitants of the state of Missouri
Authors: Hildebolt Charles F. , Molnar Stephen , Elvin‐Lewis Memory , McKee Jeffrey K.
Published: August 2005

In previous epidemiological studies, it has been suggested that geochemical factors besides fluoride may affect the prevalences of dental diseases. Our objective in this study was to determine whether the prevalences of periodontal diseases, coronal caries, and root caries for prehistoric inhabitants vary between geochemical regions of the state of Missouri. Burial sites were located on unique maps that depict geochemical variation among regions of the state. Data on dental caries and alveolar bone loss were gathered from 179 of the best preserved skeletal remains of the Late Woodland (A.D. 400–900) and Mississippian (A.D. 900–1700) periods. Mean caries scores and proportions of individuals with caries were calculated for these geochemical regions. Average alveolar bone loss was regressed on age for the individuals of these regions. Significant differences in caries and bone loss were found between several regions. These differences cannot be adequately explained by fluoride concentrations or by diet. It is suggested that geochemical factors, in addition to fluoride, may have affected the prevalences of dental diseases.
Immunoglobulin (GM and KM) allotypes in the Sikh population of India
Authors: Field L. Leigh , Surje Sira , Ray Ajit K.
Published: August 2005

The populations of India are genetically diverse, both within and between geographic regions; immunoglobulin (GM) allotypes provide important information on genetic differences between populations, since the frequencies of combinations of allotypes (termed “haplotypes”) vary dramatically among ethnic groups. As part of a project to assess genetic diversity among defined Indian populations, we have examined eight GM allotypes in a sample of 101 unrelated Sikhs who have migrated to Toronto, Canada: Glm(1, 2, 3, 17) and G3m (5, 15, 16, 21). Sikhs are a religious group that arose in the Punjab about 1500 A.D.; most of the original converts are believed to have been middle to upper‐middle caste Hindus. Gm allotyping showed that six Gm haplotypes occurred at polymorphic frequencies (>0.01) in Sikhs: Gm3;5, Gm1,17;21, Gm1,2,17;21, Gm1,17;5, Gm1,17;15,16, and Gm1,3;5. These haplotypes have all been previously reported in Indian populations. The frequencies of the first four haplotypes resembled the published frequencies for lower‐caste Hindus of NW India more than upper‐caste Hindus. However, the last two haplotypes have been found only in upper‐caste Hindus. The frequency of one of these, Gm1,17;15,16 was higher in Sikhs (0.09) than has been reported in any Indian population with the exception of Parsis (who are descended from Iranians). We speculate that the high frequency of this haplotype may have been characteristic of some of the Hindu castes in the Punjab from which Sikhs are descended.
Evolution of the ischial spine and of the pelvic floor in the hominoidea
Authors: Abitbol M. Maurice
Published: August 2005

Study of the pelvis in 143 different mammals reveals that in quadrupeds the ischial spines are barely noticeable and are located posteriorly near the sacrum. In humans, the ischial spines are prominent and more anteriorly located. As a consequence of their position and size, the ischial spines in humans become an obstacle to parturition. Herein a theory is proposed to account for what appears to be an incongruous development and orientation of the ischial spines in humans. The pelvic diaphragm is a vertical pelvic “wall” in tailed mammals and is composed of muscles involved mostly with the motion of the tail. In humans, the muscles of the pelvic diaphragm have a very different anatomical orientation. They form a horizontal pelvic “floor,” and their functions are first to support the abdominopelvic organs and resist intra‐abdominal pressure that is exerted from above, and second, as levator ani, to control the anal sphincter. In humans the muscles and fascias of the pelvic diaphragm are inserted on the ischial spines either directly or indirectly through the sacrospinous ligament and the tendinous arch of the pelvic fascia. The result is a medial pull on the ischial spines to produce a more rigid and narrower pelvic floor. An inconstant ossification center for the ischial spines make them more prominent. The backward tilt of the sacrum placed the bispinal line in a diameter position. Pongids and even fossil hominids occupy an intermediate postion between tailed mammals and Homo sapiens. The present form of the pelvis in Homo sapiens may be determined by a significant genetic component but may also be partly acquired during childhood and adolescence.
A note on the presence of blood groups A and B in pre‐Columbian South America
Authors: Llop Elena , Rothhammer Francisco
Published: August 2005

The results of ABO typing in Chilean mummies, a review of published South American paleoserological studies and a systematic discrepancy of admixture estimates based on ABO and Gm genes support the hypothesis that Andean pre‐Columbian populations possessed the A (and perhaps the B) gene in small frequencies.
Genetic variation within a linguistic group: Apalai‐Wayana and other Carib tribes
Authors: Salzano F. M. , Black F. L. , Callegari‐Jacques S. M. , Santos S. E. B. , Weimer T. A. , Mestriner M. A. , Pandey J. P. , Hutz M. H. , Rieger T. T.
Published: August 2005

A total of 136 individuals were studied in relation to 31 genetic systems, and the results were compared with South American Indian averages and previous surveys on the Wayana of French Guiana and Surinam. The information was afterwards integrated with data from other Carib groups, and two types of genetic distances (Nei's and Edwards') were calculated a) between five groups, considering ten systems; and b) between nine groups, using five systems. The two measures of genetic distances correlated well (Spearman's correlation coefficient around 0.70), and there was good agreement between the geographical and genetic distances. All analyses indicated a peripheral position for the Apalai‐Wayana and their distinctiveness from the Wayana of French Guiana and Surinam, suggesting that intertribal fusions may play an important role in the genetic differentiation of these populations.
Enlarged occlusal surfaces on first molars due to severe attrition and hypercementosis: Examples from prehistoric coastal populations of Texas
Authors: Comuzzie Anthony G. , Steele D. Gentry
Published: August 2005

During an examination of prehistoric samples from the Texas coast, individuals consistently exhibited a suite of traits on the first molars that included severe wear, hypercementosis, and resorption of the buccal margin of the alveolus. The occlusal surface of the tooth was worn below the cervical margin, with the subsequent incorporation of the buccal surface of the buccal roots into the occlusal plane. This expanded occlusal surface, which extends the buccal surface beyond the normal edge of the tooth, is composed of a combination of original enamel, secondary dentin, and cementum. There is a marked rounding of the buccal aspect of the occlusal surface. These conditions were noted in both maxillary and mandibular first molars. The resorption of alveolar bone surrounding the buccal roots resembles resorption associated with periodontal infection and is thought to be the result of severe levels of stress being applied to this portion of the dentition.
Three‐dimensional analysis of the maxillary first molar crowns of Canadian Inuit
Authors: Mayhall John T. , Kanazawa Eisaku
Published: August 2005

The maxillary first molar crowns of 48 male and 38 female Canadian Inuit (Eskimos) were analyzed three‐dimensionally by using moiré contourography methods. Cusp heights were significantly higher in males while the mesial and distal marginal ridges were more proximally placed in males. The metacone and the oblique ridge appeared to be better developed in the males. Comparison of the present results with published results for Dutch and Japanese indicated that the Japanese and Inuit had lower cusps that were more widely spaced than the Dutch. Correlation coefficients suggest that height measurements were positively correlated as were linear measurements. However, there were few significant correlations between height and linear determinations, suggesting that the development of the “width” of a crown is nearly independent of the development of the height of the cusps and crown.
Evolution of human serial pairbonding
Authors: Fisher Helen E.
Published: August 2005

Data on divorce taken for all available years between 1947 and 1981 from the Demographic Yearbooks of the United Nations on 58 peoples illustrate that divorce has a consistent pattern. Divorces exhibit a skewed distribution, characterized by the occurrence of the mode early in marriage (with a divorce peak on or around the fourth year) and a gradual, long‐tailed decline following this peak. Divorce risk peaks in age category 25–29 for males and age categories 20–24 and 25–29 for females, the height of reproductive and parenting years, and divorce counts peak among couples with two or fewer children. These properties of divorce are unrelated to divorce rate; they occur in societies with both high and low divorce rates. Data on available horticultural and gathering/hunting societies illustrate that divorce also peaks among young couples early in marriage. Remarriage by divorced and widowed individuals of reproductive age is also common cross‐culturally.

It is proposed that the above four‐year modal marriage duration among couples of reproductive age who divorce reflects a hominid reproductive strategy that probably evolved some time after the appearance of Homo in response to increased female “reproductive burden” and functioned to ensure the survival of the hominid infant through weaning. Serial pairbonding during the female's reproductive years had ancestral adaptive advantages, producing the modern cross‐cultural pattern of serial pairbonding.
The spread of exclusive mating in a chacma baboon population
Authors: Anderson Connie M.
Published: August 2005

Mating has progressively tended toward pair bonding in a chacma baboon (Papio cynocephalus ursinus) population during eight years of study. Both males and females have been mating with a smaller and smaller percentage of the potential mates available to them. Troop subdivision during the dry winter in the absence of predation was the original cause of mating limitation, but most members of winter subtroops only rarely mated with adults who had not belonged to the same winter subtroop during the summers as well. Following reintroduction of potential predation, both subtroop size and frequency decreased, but mating did not become less exclusive.
Engis: Preparation damage, not ancient cutmarks
Authors: White Tim D. , Toth Nicholas
Published: August 2005

Scratches found on the Engis 2 cranium have been described as perimortem and interpreted as intentional scalping marks by Russell and LeMort (Am. J. Phys. Anthropol. 69:317–323, 1986). These marks are described and compared to damage on other fossil hominids. The Engis marks have been misinterpreted. These marks are sandpaper striae formed during restoration of the vault, moulding striae formed when mold part lines were incised into the fossil and profiling striae formed when craniograms were made with sharp steel instrument tips. None of them have anything to do with prehistoric behavior.
Genetic differentiation among some endogamous populations of Andhra Pradesh, India
Authors: Char K. Sampath Narasimha , Lakshmi P. , Gopalam K. B. , Sastry J. Gowrinatha , Rao P. R.
Published: August 2005

Endogamous populations belonging to Brahmin, Vysya, Mala, and Madiga castes of Andhra Pradesh, South India, were investigated for certain red cell enzyme and serum protein genetic markers. Frequency values were statistically analyzed to assess genetic variation among the populations. Average heterozygosity of ten loci and genetic diversity within and between the populations were calculated by using the methods of Nei. Nei's index was used to calculate genetic distances between the pairs of populations. A dendrogram was drawn adapting the modified unweighted pair group method suggested by Li, which agreed with the history of the populations.
The anterior buccal mandibular depressions: Ontogeny and phylogeny
Authors: Arensburg B. , Kaffe I. , Littner M. M.
Published: August 2005

The frequency of an anterior buccal depression in the mandible (ABMD), or a mental fossa, is reported on 970 human mandibles of various groups and different ages, as well as in 38 mandibles of nonhuman primates. The ontogenetic and phylogenetic significance of the results relevant to development of a chin in Homo sapiens is discussed. The ABMD is also compared with the occurrence of a lingual mandibular depression.
The effect of a pattern in palmar interdigital II on a‐b ridge count in black and white down syndrome cases and controls
Authors: Davee Margaret Anne , Reed Terry , Plato Chris C.
Published: August 2005

An unconfirmed study by Fang (Ph.D. thesis, Univ. of London, 1950) in Britain showed that individuals with Down syndrome had lower total a‐b ridge counts in palmar Interdigital area II (ID II) than a group of controls. This study compares 603 white Down syndrome cases and 93 black Down syndrome cases with 668 white and 402 black controls. Our results confirm those of Fang in that the Down syndrome cases in both racial groups had lower total a‐b ridge counts than their respective controls. In addition, the black controls and Down syndrome cases had lower a‐b ridge counts than their white counterparts. The mean a‐b ridge count was significantly lower in individuals with a pattern in ID II compared to individuals without a pattern in ID II in both the Down syndrome and control groups. Some of the lower a‐b ridge counts in the Down syndrome samples can be accounted for by the fact that there is an increased frequency of a pattern in ID II in Down syndrome cases. Both Down syndrome and normal individuals who had a pattern unilaterally had a lower than expected a‐b ridge count on the contralateral hand that did not have a pattern. There was a tendency also for increased asymmetry in Down syndrome cases with a pattern in ID II.
Ethnoarchaeology among the Efe pygmies, Zaire: Spatial organization of campsites
Authors: Fisher John W. , Strickland Helen C.
Published: August 2005

This paper examines the physical structure of present‐day Efe Pygmy campsites through study of the relationships between behavior patterns and their material residues. Campsites consist of five main components: the perimeter, huts, fireplaces, trash heaps, and the central open area enclosed within the arrangement of huts. Most campsite activities are performed within the perimeter, and exterior fireplaces associated with huts are the focus of a variety of daily activities. Refuse is regularly discarded onto trash heaps. Hut size does not correlate with either the number of occupants or their stature. Site population can be estimated using a count of huts, although reoccupation of a recently abandoned camp or a family's moving from one hut to a new one during a single occupation can inflate the count of huts relative to the number of families that lived at the camp at any one time. The spatial organization of campsites is influenced by environment, physical factors (such as human body size), and sociocultural phenomena.
Significance of the social relationships of Efe Pygmy men in the Ituri forest, Zaire
Authors: Bailey Robert C. , Aunger Robert
Published: August 2005

Efe Pygmies in northeast Zaire exhibit features of social organization (small group size, flexible but predominantly patrilocal residence, close relations with kin, and pair bonds) that are common to many hunting and gathering societies. This study uses methods commonly employed in studies of nonhuman primates to investigate the associations of Efe men with other individuals as a function of their age, sex, and kinship, and it tests the hypothesis that Efe are patrilocal because hunting efficiency is improved by hunting with male relatives.

The analyses of 376 hours of focal behavior observations on 16 Efe men and observations of 71 cooperative group hunts show that the majority of associations between Efe men were with other adult men. Men associated preferentially with kin over nonkin, and they associated with close kin more than with distant kin. Men's close relationships (what we call “Companionships” sensu Smuts' “Friendships” in baboons) were predominantly with other adult men, but each man who cohabited with a woman had his strongest Companionship by far with that woman. Neither the efficiency of hunts nor the hunting success of individual men were found to be related to the degree of relatedness of hunters nor the proportion of relatives on the hunt. Alternative hypotheses concerning the functional significance of patrilocality and male kin groups are considered. We conclude that strong affiliative bonds between male kin and between males and females may arise as much from the need for strong allies in the face of competitive social situations as from economic or ecological necessity.
Nutritional status of Efe pygmies and Lese horticulturists
Authors: Dietz William H. , Marino Bruno , Peacock Nadine R. , Bailey Robert C.
Published: August 2005

We assessed the nutritional status of 90 pygmies (Efe) and 211 members of a neighboring horticultural Lese in the Ituri forest in northeast Zaire. Clinical signs of iron and iodine deficiency were highly prevalent, but the frequency of these and other clinical signs of nutritional deficiency did not differ between the two groups. Infectious diseases such as yaws, cellulitis, and filiariasis were common.

Absolute heights and weights of both Efe males and females aged 2–18 years were less than the 5th percentile of the National Center for Health Statistics standards. Weights for height of both groups were within the normal range. Weights and heights, expressed as percentages of the 50th percentile for age and sex, were significantly lower (P < .001) in Efe males and females than among Lese males and females, but weights for height did not differ significantly. Z‐Scores of height and weight were also significantly lower in Efe males and females than among their Lese counterparts. The differences in weight and height, expressed either as a percentage of the 50th percentile or as Z‐scores, were most apparent in older adolescents and persisted among adults. The normal weight for height among both populations indicated that acute undernutrition did not exist at the time of the survey. Despite comparable levels of adult fatness, measured by triceps skinfold thickness, heights of Efe males and females were lower than those of the Lese. These observations support the hypothesis that genetic differences account for the short stature of the Ituri pygmy. However, because the environments shared by the two groups are not identical and because other practices differ, nutritional effects cannot be excluded.
Ecology and affective behavior: Selected results from a quantitative study among Efe foragers of northeast Zaire
Authors: De Zalduondo Barbara O.
Published: August 2005

This paper reports selected results of a quantitative study of the affective behaviour of the Efe, exchange‐dependent hunter‐gatherers of the Ituri forest in northeastern Zaire. Measures of the amount and kind of affective display were based on systematic, direct observation of the routine behavior of three Efe bands in residential settings (camps), using a new technique to characterize affect‐laden behavior according to nonlinguistic information conveyed in the voice. Resulting data provide a direct measure of the affective milieu of a foraging people, providing an objective indicator of the subjective impact of social and ecological conditions, which are thought to affect quality of life. In this paper, measures of “camp mood” are used to explore the psychosocial impact of a 3‐month period of acute food shortage that occurred in the Ituri Project study area in 1983. Contrary to expectation, rates of behaviors conveying pleasure did not exhibit significant change, whereas a 44% increase in expressions of displeasure and a 17% drop in use of complaint tones were observed during the period of hunger. This and other findings support the view that systematic, direct observation in natural habitats can increase our understanding, both of the functions of affective behavior, and of the affective dimension of quality of life.
Prehistoric “fish‐eaters” along the eastern Arabian coasts: Dental variation, morphology, and oral health in the Ra's al‐Hamra community (Qurum, Sultanate of Oman, 5th–4th millennia BC)
Authors: Macchiarelli Roberto
Published: August 2005

The Ra's al‐Hamra prehistoric fishermen lived in isolation on the Qurum rocky promontorium in Oman during the 5th–4th millennia BC. To date, they represent the most ancient and numerous human fossil group excavated from the Arabian peninsula. Like other contemporaneous archaeologically documented small communities along the desert Arabian coasts, they intensively exploited ocean resources and collected molluscs from nearby mangrove swamps. The present study analyzes aspects of dental anthropology (including crown variation, morphology, dental wear, and oral health), in 600 permanent teeth from 49 individuals of both sexes excavated at the Mesolithic RH5‐site by the Italian Archaeological Mission in Oman from 1981 to 1985. In association with a general low degree of morphometric variation, the Ra's al‐Hamra dental crowns show low sexual dimorphism and are consistently reduced in size. These features are unexpected in a preagricultural population, especially when these data are compared to other eastern African and near Middle Eastern prehistoric populations. These data are discussed within the general context of human dental structural reduction occurring during the post‐Pleistocene and are interpreted according to the “increasing population density effect” model. There are other significant differences that characterize the Ra's al‐Hamra dentitions with respect to both eastern and western prehistoric human groups. The frequency of numerous nonmetric crown traits supports the hypothesis that a microdifferentiation phenomenon occurred in this marginal area. The preliminary skeletal analysis and the palaeodemographic profile show that the Omani prehistoric fishermen were affected by genetic isolation and inbreeding as well as strong environmental stress. Because of the grit assimilated with dried fish and the high shellfish consumption, dental wear was extreme in all age groups at Ra's al‐Hamra and occasionally was responsible for serious hematogenously spread infections. In spite of the great anthropological importance of ancient Arabian populations, very few studies on skeletal and dental samples have been completed. The present paper offers an odontological data set for future comparative research in the area.
On the differences between two pelvises of Mousterian context from the Qafzeh and Kebara caves, Israel
Authors: Rak Yoel
Published: August 2005

Two pelvises from a similar archaeological context have been discovered in recent years in two different caves in Israel. The pelvis from the Qafzeh cave (Qafzeh 9) was dated by means of thermoluminescence at approximately 95 kyr BP. All available measurement values, the most significant being those of the diagnostic obturator region, fall within those of the modern range. The other pelvis emanates from the Kebara cave and differs fundamentally from modern pelvises and from the Qafzeh specimen, although the Kebara pelvis is 30,000 years younger than the latter. As in other remains of Neandertal pelvises, the superior public ramus of the Kebara hominid is extremely long and slender and exhibits a cross section unlike that of modern humans. The absolute height of the obturator region is very small. It is these measurements and proportions that set the Kebara pelvis apart from both modern pelvises and the specimen from Qafzeh. The morphological differences and the chronological relationship between the two fossil pelvises support the concept of two distinct evolutionary lineages for these hominids.
Longevity factor in hominoid social organization
Authors: Stephens M. E.
Published: August 2005

In most primate groups emigration of the maturing young of one or the other sex tends to serve as an incest avoidance mechanism. Among most primate species it is the males who change groups. This supports the theory that, in terms of reproductive success, males should compete for mates and females should compete for resources. In hominoids the combination of increased longevity and greater female discrimination in mate selection seems responsible for female emigration. This may relate to the high frequency of patrilocality and male control of resources among human groups.
Diversity of palmar pattern ridge counts in Iranian populations
Authors: Sharif Kamali M. , Mavalwala Jamshed
Published: August 2005

We analyzed bilateral palmar prints of 3,158 individuals from 13 Iranian populations of diverse origins for palmar pattern ridge counts. Right palms did not show greater counts than the left in the majority of the populations studied. Highly significant interpopulational variation was observed for most palmar areas of both males and females. Dendrograms of males and combined sexes showed a good fit with the ethnohistoric background of the populations studied. The results thus demonstrate variation in the palmar pattern ridge counts of populations of diverse origins and may be used as a good measure of population distance.