Effects of lactation on the time-budgets and foraging patterns of female black howlers (Alouatta pigra).

abstract：:The robustness index (RI) is determined by multiplying dental mesiodistal and buccolingual diameters, and is used to estimate occlusal area. However, because teeth are not rectangular its calculation consistently causes overestimations. Moreover, teeth, in particular molars, are not identically shaped so overestimatio...

journal_title：American journal of physical anthropology

authors： Schmidt C,Ousley S,Schmidt M

更新日期：2011-06-01 00:00:00

abstract：OBJECTIVES:The present study tests the effectiveness of entheseal robusticity (ER) as a potential predictor of adult age-at-death by applying multiple regression models to a large contemporary identified skeletal sample. MATERIALS AND METHODS:ER was recorded for 23 bilateral postcranial entheses on 481 adult individua...

journal_title：American journal of physical anthropology

authors： Milella M,Belcastro MG,Mariotti V,Nikita E

更新日期：2020-09-01 00:00:00

abstract：:Craniofacial variables for modern and prehistoric Japanese were subjected to multivariate analysis to test the relationships of the people of Japan with mainland Asian and Oceanic samples. The modern Japanese are tied to Koreans, Chinese, Southeast Asians, and the Yayoi rice agriculturalists who entered Japan in 300 B...

journal_title：American journal of physical anthropology

authors： Brace CL,Brace ML,Leonard WR

更新日期：1989-01-01 00:00:00

abstract：:Several investigators have questioned the significance of handedness as an explanation of directional forelimb asymmetries, yet little has been done to isolate other explanatory factors. In this investigation, we analyze 61 female and 76 male rhesus macaque skeletons for evidence of age- and/or sex-associated variatio...

journal_title：American journal of physical anthropology

authors： Helmkamp RC,Falk D

更新日期：1990-10-01 00:00:00

abstract：:Morphological measurements were collected from 12 wild and 12 captive mona monkeys (Cercopithecus mona) on the Caribbean island of Grenada. Mona monkeys were introduced to Grenada from Africa approximately 200 to 300 years ago during the slave trade era. Wild monkeys were captured using either 1) a baited treadle-door...

journal_title：American journal of physical anthropology

authors： Glenn ME,Bensen KJ

更新日期：1998-04-01 00:00:00

abstract：:Genetic data consisting of 14 red cell antigen groups and 11 serum and erythrocytic protein marker systems from four Eskimo populations of the Norton Sound area of Alaska are reported. The population structure of these four groups in analyzed both separately and within the larger context by comparison to 15 other circ...

journal_title：American journal of physical anthropology

authors： Crawford MH,Mielke JH,Devor EJ,Dykes DD,Polesky HF

更新日期：1981-06-01 00:00:00

abstract：OBJECTIVES:In recent years, several studies have shown that populations from cold, high-latitude regions tend to have relatively shorter limbs than populations from tropical regions, with most of the difference due to the relative length of the zeugopods (i.e., radius, ulna, tibia, fibula). This pattern has been explai...

journal_title：American journal of physical anthropology

authors： Betti L,Lycett SJ,von Cramon-Taubadel N,Pearson OM

更新日期：2015-09-01 00:00:00

abstract：OBJECTIVES:Differences in dental caries prevalence between males and females is considered a reflection of diet. However, recent syntheses argue that sex-specific variation in dental caries prevalence also reflects changes in the oral cavity attributable to variation in reproductive life histories. This study explores ...

journal_title：American journal of physical anthropology

authors： Kubehl K,Temple DH

更新日期：2020-07-01 00:00:00

abstract：OBJECTIVES:The objectives of this study are to describe genetic correlations between dental dimensions in a platyrrhine primate, to assess whether the brown-mantled tamarin dentition exhibits genetic modularity by tooth type, and to discuss the relationship between body size reduction and the genetic architecture of de...

journal_title：American journal of physical anthropology

authors： Hardin AM

更新日期：2019-07-01 00:00:00

abstract：:We documented the spacing and distribution of perikymata on the buccal enamel surface of fossil hominin anterior teeth with reference to a sample of modern human and modern great ape teeth. A sample of 27 anterior teeth attributed to Australopithecus (5 to A. afarensis, 22 to A. africanus) and of 33 attributed to Para...

journal_title：American journal of physical anthropology

authors： Dean MC,Reid DJ

更新日期：2001-11-01 00:00:00

abstract：:In the present study the frequency of the simian crease among 57 Down patients is compared to the corresponding figures of related and unrelated individuals. A study of the correlation with the dermatoglyphic patterns of the thenar and hypothenar areas is presented, the palm print classification being carried out acco...

journal_title：American journal of physical anthropology

authors： Rignell A

更新日期：1987-03-01 00:00:00

abstract：:Gene and haplotype frequencies for HLA-A and HLA-B antigens were determined in Milwaukee blood donors of German and Polish descent. Gene frequencies for A25 and B18 were significantly higher in Poles than in Germans. Significant gametic associations were noted for A1-B8, A29-B12 and AW30-B13 in both populations. Gamet...

journal_title：American journal of physical anthropology

authors： Stevenson JC,Duquesnoy RJ

更新日期：1978-01-01 00:00:00

abstract：:The methods used to study human growth and development (auxology) have not previously been applied within the setting of hominin maturation (ontogeny). Ontogeny is defined here as the pattern of biological change into an adult form, both at the individual and species level. The hominin fossil record has a lack of reco...

journal_title：American journal of physical anthropology

authors： Bolter DR,Cameron N

更新日期：2020-10-01 00:00:00

abstract：:A number of living primates feed part-year on seemingly hard food objects as a fallback. We ask here how hardness can be quantified and how this can help understand primate feeding ecology. We report a simple indentation methodology for quantifying hardness, elastic modulus, and toughness in the sense that materials s...

journal_title：American journal of physical anthropology

authors： Lucas PW,Constantino PJ,Chalk J,Ziscovici C,Wright BW,Fragaszy DM,Hill DA,Lee JJ,Chai H,Darvell BW,Lee PK,Yuen TD

更新日期：2009-12-01 00:00:00

abstract：:Two sequences of nucleotides are homologous if they are descended through a chain of replication from a common precursor molecule. Since organs are not copies or transcriptions of organs, the concept of morphological homology has no such simple and unambiguous definition. The theoretical vagueness of morphological hom...

journal_title：American journal of physical anthropology

authors： Cartmill M

更新日期：1994-05-01 00:00:00

abstract：:Bone samples from a Middle Bronze Age (ca., 1600-1300 BC) site were prepared for histological analysis. Preliminary results suggested that components of bone marrow remained preserved. To verify these findings and optimize the sample preparation procedure, we conducted experiments varying the type of acid used to deca...

journal_title：American journal of physical anthropology

authors： Setzer TJ,Sundell IB,Dibbley SK,Les C

更新日期：2013-12-01 00:00:00

abstract：:This study examines the appearance of the secondary ossification centers in the lower arms, wrists, lower legs, and ankles of a cross-sectional sample of 20 infant orangutans and chimpanzees (15 of known age). The number of tarsal and carpal centers is analyzed relative to the degree of M1 development and the weight o...

journal_title：American journal of physical anthropology

authors： Winkler LA

更新日期：1996-01-01 00:00:00

abstract：:Members of the Cercocebus-Mandrillus clade are united by several morphological features, including expanded premolars which are argued to be associated with a preponderance of hard objects in the diet. We test the association between premolar expansion and hard object feeding by examining how different dental regions ...

journal_title：American journal of physical anthropology

authors： McGraw WS,Vick AE,Daegling DJ

更新日期：2011-01-01 00:00:00

abstract：:Museum curators and living communities are sometimes reluctant to permit ancient DNA (aDNA) studies of human skeletal remains because the extraction of aDNA usually requires the destruction of at least some skeletal material. Whether these views stem from a desire to conserve precious materials or an objection to dest...

journal_title：American journal of physical anthropology

authors： Bolnick DA,Bonine HM,Mata-Míguez J,Kemp BM,Snow MH,LeBlanc SA

更新日期：2012-02-01 00:00:00

abstract：:Excessive central fat in children and adolescents is a risk factor for cardiovascular and metabolic disorders. This study aimed to compare the body fat distribution patterns of children and adolescents in Abeokuta, Nigeria with international reference standards. Five hundred seventy children aged 5 to 19 years were se...

journal_title：American journal of physical anthropology

authors： Senbanjo IO,Oshikoya KA,Olutekunbi OA,Njokanma OF

更新日期：2013-04-01 00:00:00

abstract：:Archaeological and ethnohistorical documents suggest that the Chachapoya region was inhabited by a number of distinct sociopolitical groups that only united in the face of their common enemy, the Inka. The purpose of this research is to quantify the amount of internal genetic differentiation and levels of extraregiona...

journal_title：American journal of physical anthropology

authors： Nystrom KC

更新日期：2006-11-01 00:00:00

abstract：:The relationship between psychological stress and reduced fecundity has been a matter of speculation and investigation for decades. Most previous studies have been compromised, however, by a number of problems including ambiguous direction of causation, poorly operationalized variables, and the confounding of psycholo...

journal_title：American journal of physical anthropology

authors： Ellison PT,Lipson SF,Jasienska G,Ellison PL

更新日期：2007-12-01 00:00:00

abstract：:Data on orangutans (Pongo pygmaeus abelii) living in a Sumatran swamp forest yield an estimated median interbirth interval of at least 8 years, concurring with findings from other sites. This longest known mammalian interbirth interval appears due to maternal amenorrhea during the long exclusive dependence of the offs...

journal_title：American journal of physical anthropology

authors： van Noordwijk MA,van Schaik CP

更新日期：2005-05-01 00:00:00

abstract：:Bilateral correlations are higher and bilateral variances within individuals smaller in the samples of inbred individuals than in matched control groups of the same sex for pattern intensities on fingers in four series of data and also for pattern intensities on palms, toes, and soles and the palmer main line indices ...

journal_title：American journal of physical anthropology

authors： Mukherjee A

更新日期：1990-01-01 00:00:00

abstract：OBJECTIVES:European ancestry in many populations in Latin America at autosomal loci is often higher than that from X-linked loci indicating more European male ancestry and more Amerindian female ancestry. Generally, this has been attributed to more European male gene flow but could also result from an advantage to Euro...

journal_title：American journal of physical anthropology

authors： Hedrick PW

更新日期：2017-07-01 00:00:00

abstract：OBJECTIVES:The appearance of external auditory exostoses archaeologically has been attributed to aquatic activities in middle latitudes. However, recent clinical research implicates low sea surface temperatures, especially below a threshold of 19°C, as a stronger predictor of ear exostosis development than latitude. He...

journal_title：American journal of physical anthropology

authors： Smith-Guzmán NE,Cooke RG

更新日期：2019-03-01 00:00:00

abstract：:The mummification methods of an ancient maritime population on the northern coast of Chile are reviewed and the findings in an additional seven individuals are reported. Members of this cultural group, Chinchorro, practiced a selective, elaborate form of artificial mummification which persisted more than 4,000 years. ...

journal_title：American journal of physical anthropology

authors： Aufderheide AC,Muñoz I,Arriaza B

更新日期：1993-06-01 00:00:00

abstract：:A total of 495 individuals from five different Argentinian tribes was examined for variation in 23 blood group and protein genetic systems, and the results were integrated with previous data on some of these systems. These tribes generally present RH * R1, PGM1 * 1, and ACP * A frequencies lower and RH * R2, ESD * 1, ...

journal_title：American journal of physical anthropology

authors： Goicoechea AS,Carnese FR,Dejean C,Avena SA,Weimer TA,Franco MH,Callegari-Jacques SM,Estalote AC,Simões ML,Palatnik M,Salzano FM

更新日期：2001-06-01 00:00:00

abstract：OBJECTIVES:The degree of expression of sulcal patterns on endocasts of nonhuman primates has been shown to depend primarily on species (brain size) and age of the individual. It has been suggested that brain details on endocasts are reproduced better in juvenile than adult primates. Here, we investigated age-related ch...

journal_title：American journal of physical anthropology

authors： Van Minh N,Hamada Y

更新日期：2017-06-01 00:00:00

abstract：:Mexican Americans are a numerous and fast growing ethnic population in the United States. Yet little is known about their genetic structure. Since they are a hybrid, it is of interest to identify their parental populations and to estimate the relative contributions of these groups. This information is relevant to hist...

journal_title：American journal of physical anthropology

authors： Long JC,Williams RC,McAuley JE,Medis R,Partel R,Tregellas WM,South SF,Rea AE,McCormick SB,Iwaniec U

更新日期：1991-02-01 00:00:00