Assessing the reliability of criteria used to identify mandibles and mandibular teeth in sheep, Ovis, and goats, Capra

Criteria developed to distinguish between the mandibles and mandibular teeth of sheep and goats are evaluated using modern specimens from the collections of the National Museum of Natural History and the Field Museum of Natural History. Certain teeth prove to be quite reliable in this regard (dP3, P3, P4). Other dental elements, however, are not reliable and should not be used in dental based identifications of these closely related species (dP4, M1, and mandibular bones). Overall, the identification of sheep dentition using these criteria is more reliable than it is for goats. However, the generally greater likelihood of incorrect identification of goat teeth and mandibles means that specimens identified as sheep are likely to contain high proportion of misidentified goats. Both the proportion of remains that can only be classified as ‘Ovis-Capra’ and the proportion of incorrectly identified teeth and mandibular bones varies with age, with identifications of younger and older animals less reliable than those of animals in the 1.5–6 year age range. Reliability of identifications increases when more criteria and more elements are used. Identifications based on whole mandibles with complete tooth rows are quite reliable. However, the proportion of specimens likely to be classified as ‘Ovis-Capra’ also increases in whole mandible identifications, especially in goats. Systematic differences in the proportions of indeterminate and incorrect identifications have a significant impact on species-level dentition-based harvest profiles. Recommendations are made for the use of dentition and long bone based harvest profiles in the study of sheep and goat exploitation strategies.     

An assessment of morphological criteria for discriminating sheep and goat mandibles on a large prehistoric archaeological assemblage (Kerma,Sudan)

This paper presents an assessment of all known dental and mandibular morphological criteria for differentiating sheep (Ovis aries) and goats (Capra hircus) using for the first time an archaeological sample of complete caprine skeletons (90 sheep and 13 goats) from burials at Kerma (Sudan, 3rd and 2nd millennia BC). The species determinations were assessed using cranial and post-cranial morphological criteria. Consequently, the reliability (percentage of correct determination) and efficiency (complementary percentage of intermediate scores i.e. neither sheep nor goat) of 38 individual dental criteria could be fully assessed using a prehistoric homogeneous domesticate population. We demonstrate that, for this sample, individual criteria for lacteal teeth are more reliable for sheep (sheep: 95 ± 3%) than the adult premolars (85 ± 5%) and molars (sheep: 88 ± 2%), whereas for goats premolar criteria were more reliable (83 ± 12%). For efficiency, lacteal dental criteria are better (goat: 97 ± 5%; sheep: 95 ± 3%) than those for premolar (goat: 85 ± 10%; sheep: 79 ± 5%) and molar (goat: 82 ± 6%; sheep: 83 ± 2). We also demonstrated that most isolated teeth can be determined with less than 10% error. However, on average, within specific age classes (0–1 year, 1–4 years and more than 4 years), isolated teeth increased in reliability and decreased in efficiency. The average reliability of the criteria for complete mandibles for each age class for goats and sheep was 100%, when the efficiency was 67, 40 and 50% for goats and over 90% for sheep. This is due to the effect of age on the efficiency of isolated criteria and the poor performance of specific criteria mainly those P3, M1 and M2. We conclude that separate species kill-off profiles are possible. The effect of age on dental criteria would not significantly change the interpretation for specific subsistence strategies focused on one particularly species.     

Distinguishing sheep and goats using dental morphology and stable carbon isotopes in C4 grassland environments

Distinguishing between sheep and goats in C₄ grass environments using new dental morphology criteria and enamel bioapatite stable carbon isotope ratios (δ¹³C) was tested on 35 modern individuals from the Central Rift Valley of Kenya. Two morphological criteria on the second and third lower molars, one of which had been previously partially described by Halstead et al. [Journal of Archaeological Science 29 (2002) 545], were found to be highly reliable in this population. Identification of species using carbon isotope ratios is made possible in some circumstances by differences in the feeding behavior of sheep, which are mainly grazers, and goats, which are mainly browsers. In environments where C₄ grasses predominate, sheep include a higher proportion of C₄ plants in their diet, and thus have higher δ¹³C values than goats. In the present study, the annual range and seasonal variation of carbon isotope ratio of diet of sheep and goats was measured from intra-tooth sequential analysis. Although the ranges of goat and sheep δ¹³C values overlap, those higher than −3.4‰ all belong to sheep; values lower than −5.2‰ all belong to goats. There is no overlap of the mean δ¹³C values by tooth, which range from −11.8‰ to −4.2‰ for goats, and from −3.1‰ to −1.3‰ for sheep. These results suggest that carbon isotope analysis of bone collagen and/or apatite will also distinguish sheep from goats in tropical C₄ grasslands. Application of the δ¹³C criteria to archaeological material must be restricted to C₄-dominated environments, and where potential access to C₃ plants (mobility, foddering) can be assessed. The utility of these morphological and isotopic criteria for differentiating sheep and goat breeds in other regions remains to be evaluated.     

Morphological distinctions between the mandibular teeth of young sheep, Ovis, and goats, Capra

Morphological distinctions between the mandibular teeth of young sheep (Ovis) and goats (Capra) are described, and their value in the study of bone samples from archaeological sites is briefly discussed.     

An exploration of character traits and linear measurements for sexing mountain gazelle (Gazella gazella) skeletons

The skeletal elements of mountain gazelle (Gazella gazella) have proven difficult to sex with statistical confidence due to wide overlap in the body size of the two sexes. We studied a sample of 53 modern mountain gazelle skeletons to determine which character traits and metric measurements best predict sex. The success of the character traits was determined using blind tests while the metrics were examined using discriminant function analysis. The most useful elements include the previously identified horn core, pubis and atlas, but also some new bone portions that preserve well in the archaeological record (e.g., distal tibia, distal metacarpal and metatarsal, and second phalanx). Surprisingly, two elements commonly used in sexing analyses (distal humerus and astragalus) were not among the most effective elements. Although cutting points and discriminant functions for sexing gazelle bone portions are presented here, they do not account for potential body size change and thus are not suited for direct application to archaeological assemblages. Instead, we provide guidelines for application to archaeological gazelle assemblages, most importantly a regression analysis that considers the sex ratios obtained from multiple measurements to predict the sex ratio of archaeological gazelle populations.     

Dental Microwear and Diet in Domestic Sheep (Ovis aries) and Goats (Capra Hircus): Distinguishing Grazing and Fodder-fed Ovicaprids using a Quantitative Analytical Approach

In recent years, dental microwear analysis has attracted considerable interest as a potential method for reconstructing ancient diet. This article presents results from research exploring the potential of dental microwear analysis in the reconstruction of domestic ungulate diet through the quantitative analysis of diet-microwear relationships in modern grazing and fodder-fed sheep and goats. Diet-related microwear patterning is identified in the modern populations examined and it is concluded that with investigation of a wider range of modern diets, dental microwear analysis will emerge as a valuable and insightful approach for the investigation of diet in ancient livestock.     

Dental Remains from the Middle Paleolithic Layers of Altai Cave Sites*

Two Middle Paleolithic cave sites in the Altai – Okladnikov and Chagyrskaya – have yielded dental remains (mostly isolated teeth) of individuals of various ages. A newly discovered mandibular fragment with teeth from Chagyrskaya Cave reveals a Neanderthal trait combination: anterior fossa and epicristid (midtrigonid crest) on molars, metaconid and crest on premolars. The totality of dental traits support the conclusion previously drawn on the basis of postcranial characters: Altai Neanderthals appear to be intermediate between other Eurasian Neanderthals and anatomically modern humans.     

Prediction Models for Age‐at‐Death Estimates for Calves,Using Unfused Epiphyses and Diaphyses

For cattle (Bos taurus), age estimations using dental criteria before the eruption of the first molar (3–8 months) have large error margins. This hampers archaeozoological investigation into perinatal mortality or the putative slaughtering of very young calves for milk exploitation. Previous ageing methods for subjuveniles have focused on the length of unfused bones, but it is rarely possible to use them because they are restricted to foetuses and because of the fragmentation of bones. This paper presents new age prediction models based on length, breadth and depth of post cranial bones produced from a dataset of modern calves (n = 27). This reference collection was compiled from material of known age at death, sex and breed from collections in Britain, France, Germany and Switzerland. Linear regression models were constructed using the modern data for age prediction, and these models were then successfully tested and assessed using a Middle Neolithic assemblage of complete calves' skeletons from Bourguignon‐Lès‐Morey, France. From the assessment, the astragalus and metapodials were determined to be the most reliable bones, and the femur was the worst. Measurements of the epiphyseal and distal elements and depth measurements were the most reliable. For ages before 12 months, these models can provide ±1 month age estimates. Copyright © 2013 John Wiley & Sons, Ltd.     

Ages of epiphyseal closure in feral and domestic goats and ages of dental eruption

The bones of 53 goats of known age, sex, and breed were examined to determine the ages of epiphyseal closure, and the mandibles of 36 of them were examined for ages of dental eruption. The ages of epiphyseal closure varied greatly according to the sex and breed of the animal, feral goats being about a year behind domestic goats, and castrate males being anything up to 4 years behind females. In all goats, maturation is much later than in the modern sheep. Ages of dental eruption agreed with earlier findings on the live animal and showed no similar discrepancies.     

A radiological and histological investigation into the mummification of cats from Ancient Egypt

An examination has been carried out on a series of wrapped mummified cats from Ancient Egypt that are held in the British Museum (Natural History). The cats, which were unprovenanced and undated, were presented by Sir Flinders Petrie at the beginning of this century, but they were not registered in the collections and have never been described. Radiocarbon dates have now been obtained for two of the cats and radiographs have been taken of each one to establish its identification and age at death. Attempts were made to reconstitute the skin tissue and samples of hair were studied by electron microscopy.     

Study and restudy of curated skeletal collections in bioarchaeology: A perspective on the UK and the implications for future curation of human remains

This paper considers the bioarchaeological study and restudy of human skeletal remains in museums and other institutions that curate human remains from archaeological sites. Papers published from 1990 to 2009 in the Journal of Archaeological Science, Journal of Paleopathology, American Journal of Physical Anthropology and International Journal of Osteoarchaeology were considered and contributions dealing with skeletal remains from UK archaeological sites were assessed. There were 258 papers published that matched these criteria and 352 instances when a skeletal collection had been analysed. Seventy‐nine per cent of the papers were based on skeletal samples curated in five geographic areas, London, Bradford, Portsmouth, Canterbury and York; the two sites that were most used were those of Wharram Percy, North Yorkshire, curated in Portmouth at English Heritage, and Christ Church, Spitalfields, curated at the Natural History Museum, London. Reasons for this concentration of research are suggested. It is recommended that the ‘use load’ should be better and more evenly spread around skeletal samples in other geographic areas of the UK in order that knowledge is not limited just to a few skeletal collections, and that a centralised database of skeletal collections curated by different institutions would contribute to this aim. Copyright © 2010 John Wiley & Sons, Ltd.     

A cohort of trees,photographs, scientists,an artist and a curator: the collaborative study of environmental change

ABSTRACT

I explore how a historic image archive can be re-worked through collaborative artistic-scientific practice, and how photography can be ‘re-performed’ as a strategy to observe an environmental change. The focus is on a project by the photographer Chrystel Lebas, who between 2011 and 2017 worked in collaboration with botanists from the Natural History Museum, London. The collaborators used historic and contemporary photographs for seasonal observations in the field. Their specific interest was in the potential for using historic visual ecological records to investigate environmental change as observed now.

The paper explores the hybridization of technical, aesthetic and embodied knowledge, the application of montage and the tacit creation of a visual framework for observation. It draws attention to the potential inflexibility in interpretation inherent in the accepted systematic practice of placing ecological records within a herbarium in a natural history collection. Secondly, it illustrates the neglected potential of photographic collections within scientific research.     

FOUNDATIONS OF THE CADES POND CULTURE IN NORTH-CENTRAL FLORIDA: THE RIVER STYX SITE (8AL458)

The River Styx site was an important Middle Woodland ceremonial center in north-central Florida that included a horseshoe-shaped earthen embankment, a burial mound containing only cremations, and diverse nonlocal artifacts. The site was recorded more than forty years ago but a report was never written. This article presents a summary of excavation results at River Styx and analysis of the pottery assemblage based on archived notes and collections at the Florida Museum of Natural History. From the pottery assemblage, 24 vessel lots, consisting of mostly partially reconstructed vessels, are described in terms of form, surface treatment, and mineralogical constituents characterized by petrographic analysis. The provenance of each vessel is inferred, and more than half of the analyzed assemblage is judged to be nonlocal.     

The frequency and distribution of dental caries and tooth wear in a Byzantine population of Sa'ad,Jordan

The aim of this study was to determine the frequency, distribution and extent of dental caries and tooth wear in a Byzantine population in Sa'ad, to compare these with modern Jordanians, and to draw inferences about their lifestyle. Dental caries and tooth wear were examined in 1159 permanent teeth using direct vision and dental explorer. The location and extent of the lesions were recorded and evaluated according to defined criteria. The overall caries prevalence was 16.8% (n = 1159). Most of the carious lesions (13. 9%, n = 1159) were present in the tooth crown, on occlusal or proximal surfaces; 2.9% of teeth displayed root caries alone. The upper and lower central incisors exhibited the lowest coronal caries frequency, while molars showed the highest frequency. Attrition with moderate dentine exposure was evident in most teeth. Some teeth (9.8%) demonstrated oblique abrasion and 9 (0.78%) teeth exhibited cupped occlusal surfaces. The prevalence of caries was within the range reported for other Byzantine populations and lower than that of modern Jordanians. The attrition seen in most teeth and the cupped occlusal surfaces might be due to eating abrasive food, drinking wine or acidic beverages. Oblique abrasion on the facial and palatal surfaces reflects their business or craft, such as basket making and leather processing. Copyright © 2008 John Wiley & Sons, Ltd.     

A guide for the distinction of species, sex and body side in bones of sheep and goat

Morphological criteria are described that were found to be the most successful for distinguishing between skeletal fragments of adult sheep (Ovis) and goats (Capra) in the Western European, early medieval sites of Haithabu and Oldenburg in Holstein. It is emphasized that a sufficiently large sample should be observed. In addition, methods are given for distinguishing sex in the pelvis, and body side in distal metacarpus and metatarsus ends.     

Injuries to the skeleton due to prolonged activity in hand-to-hand combat

Two complete skeletons from the Hamman-Todd collection of the Cleveland Museum of Natural History (CMNH) show a suite of pathological lesions that suggest the individuals had been involved in boxing or other hand-to-hand combat. These lesions were studied and compared with medical and autopsy records. The aims of the research were to estimate the accumulated damage to the bones over time, to characterize the different types of the damage, and to establish criteria for hand-to-hand combat or violence for archaeological material. Our inspections showed that besides the muscle markings developed and the numerous healed fractures that are expected when someone is involved in such activities, other types of lesion are present that are helpful for a proper differential diagnosis. These are: degenerative changes at the lesser tuberosity of the humerus; focal necrotic changes/bone growth on the trochlea of the humerus; necrotic changes on the distal head of the ulna; bony patches on upper limb bones only; secondary centres of ossification failing to fuse (mainly in vertebrae and acromion); a huge conoid tubercle on the clavicle; bony spurs on the distal articular head of the metacarpals; necrotic changes on the femoral head next to the fovea and on the roof of the acetabulum; and a developed bony ridge for the attachment of the iliotrochanteric ligament. Finally, we propose a set of criteria that will help to identify people in archaeological material who were involved in hand-to-hand combat.     

Reference codes for wear states in the mandibular cheek teeth of sheep and goats

Reference codes are described for wear states in the mandibular cheek teeth of sheep and goats.     

Reconstruction of Caprine Management and Landscape Use Through Dental Microwear Analysis: The Case of the Iron Age Site of El Turó de la Font de la Canya (Barcelona,Spain)

This paper presents the results of a pilot study using dental microwear analysis on 23 sheep and goat teeth dated to the 6th century BC from the Iron Age site of El Turó Font de la Canya (Barcelona, Spain). This study aimed to reconstruct livestock management practices and landscape use. The dental microwear pattern indicates that sheep and goats could have been grazing in the same area where vegetation was composed of shrubs, bushes and non-graminaceous plants on an eroded landscape, although additional supplies of fodder cannot be excluded. This scenario is compatible with the archaeological and palaeoenvironmental data which suggest a possibly increased territoriality, land degradation and an increase of woodland clearance during Iron Age in the North-east of the Iberian Peninsula. Furthermore, we applied two recent microwear approaches which provide more information about mortality events and the possibility of distinguishing between an intensive and extensive management. This paper demonstrates how this method can be used to better understand animal husbandry practices and landscape use in Late Prehistory.     

Sample-specific (universal) metric approaches for determining the sex of immature human skeletal remains using permanent tooth dimensions

In this paper, three approaches for developing sample-specific sex determination methods of immature skeletal remains based on permanent tooth dimensions are proposed and tested using a sample of identified skeletons. The sample comprises adult and subadult individuals selected from the Lisbon documented skeletal collection, housed at the National Museum of Natural History in Lisbon, Portugal. Faciolingual and mesiodistal diameters were the tooth dimensions utilized. In the first approach, sex-specific logistic regression formulae based on adult tooth dimensions are developed and then used to determine the sex of the subadult sample. The second and third approaches are based on the sectioning point procedure, which uses the overall mean of a measurement (tooth diameter) collected from the sample as the discriminant criteria for determining the sex of the individuals in that sample. While in the second approach the adult overall mean of each dimension is used as the discriminant criteria for determining the sex of the subadults, in the third approach it is the subadult overall mean of each dimension that comprises the discriminant criteria that is applied back to the subadults for determining sex. Results show that the canines are the teeth with the highest sexual dimorphism and methods of sex determination based on canine dimensions provide correct allocation accuracies between 58.8% and 100% depending on the diameter and the approach that is being used. Canine faciolingual dimensions provide the best overall results. Combinations of measurements from the same and different teeth do not increase significantly the accuracy of the methods and approaches. Some of the problems of subadult sex determination methods based on adult tooth dimensions result from differing levels of sexual dimorphism between the adult and subadult segment of the sample. Mortality or cultural bias may increase or decrease the sexual dimorphism of the subadults compared to the adults. Small subadult samples utilized in this study may also raise questions regarding the accuracy of the three different sample-specific approaches. However, high consistency of results using the canine and different approaches, suggests that adult and subadult canine dimensions can be reliable sex discriminators of immature skeletal remains in archaeological samples. The major advantage of the approaches presented here is that they can be used to derive sample-specific methods and, therefore, eliminate the problem of applying morphological or metric methods to individuals originating from a population that differs from the one that contributed to the development of the method.