Metapodial asymmetry in draft cattle

Traction work by oxen has been well documented in various pictorial and written sources throughout human history. Analysis of metapodial dimensions has been carried out with the aim of quantifying asymmetry related to sexual dimorphism, body size and possibly heavy duty traction work. A modern reference sample of 103 animals from Hungary and Rumania has been used for this purpose. Bone measurements were correlated with bone density and morphological characteristics in order to make the results applicable for the identification of remains from draft cattle in archaeozoological assemblages. Asymmetry is more pronounced in the thoracic extremity and metacarpals of older or heavier animals, sometimes showing excessive widening of the third, medial ray within the fused bone. Relative broadening is also intensive in the distal end of medial metatarsals of cows and oxen. The bone mineral content of the medial carpal region attains mature density first. The weight of phalanges increases for a longer time in the laterally located toes.     

Metrical discrimination between mandibular first and second molars in domestic cattle

The difficulty of distinguishing between loose first and second mandibular molars of domestic cattle (BOS taurus) from archaeological sites is well known. This paper proposes cervical length as a discriminatory measurement. The possibility that cervical measurements of first and second mandibular molars may be sexually dimorphic is also explored.     

The conundrum of castration in the archaeological record: An interpretation of Roman cattle horn-cores from Chelmsford,Essex

Current methods of sexing archaeological cattle bones, in particular the metapodials, are based upon past research into contemporary breeds and this work embraces a limited sample size, spread across a vast geographical area. Although the separation of cows and bulls is not in question, there appears a great deal of subjectivity in the literature concerning the identification of castrated beasts. Living bone is in a dynamic state of equilibrium with the rest of the body and responds to increased loading, that is, an increase in weight of the beast or stress/strain through strenuous movement, by remodelling. If cows and oxen are performing the same work, as for example in ploughing, then loading on the bones will be similar. These bones will thus respond by remodelling in corresponding fashion, and hence any morphological and metrical distinctions will be clouded. Horn-cores are less subject to these constraints, although in some cultures there may be loading on these bones, for example through attaching the harness to the horns for ploughing. The Chelmsford cattle horn-cores constitute waste from some industrial activity and it is argued in the text that horn-working is the most likely candidate, together with possibly tanning. Sexing of the bones strongly indicated male animals, with few females being present. A procedure for detecting castrated cattle (oxen) is presented, the results of which suggest an equivalent ratio of oxen to bulls.     

Problems and pitfalls in the diagnosis of linear enamel hypoplasia in cheek teeth of cattle

Prevalence and intensity of enamel hypoplasia have been used as markers of generalized physiological stress during dental development in a wide range of mammalian taxa. We studied cattle (Bos taurus) cheek teeth exhibiting morphological characteristics that are of relevance to the diagnosis of enamel hypoplasia in this and other bovid species. These characteristics were multiple, more or less horizontally arranged (waveform) lines or grooves in the cementum of the tooth crown and the adjacent root area, leading to an imbricated appearance of the cementum. On macroscopic examination of tooth surfaces, these lines resembled linear enamel hypoplasia (LEH). Microscopic analysis of tooth sections, however, revealed that the lines occurred in the cementum only, and that the underlying enamel did not exhibit morphological irregularities. In cheek teeth of older cattle, a thick cementum layer is regularly found in the cervical crown portion and the adjacent root area. Apposition of this cementum is related to the uplifting of the teeth from their alveoli, a process that compensates for the shortening of the tooth crowns due to occlusal wear. In the studied specimens, a pronounced periodic nature of tooth uplifting and the related deposition of cementum is the likely cause for the observed imbricated appearance of the cementum. While this phenomenon may be misinterpreted as representing a case of LEH, presence of enamel hypoplasia in bovid teeth may be overlooked when the defects become filled with coronal cementum and are therefore not apparent on external inspection. This was the case in one of the cattle teeth analyzed by us, in which the hypoplastic enamel defects were, however, clearly discernible in ground sections. Microscopic analysis of tooth sections is recommended for recording of LEH in bovid teeth in cases where macroscopic examination of tooth surfaces alone does not produce unequivocal results.     

Trends in pig product processing at British Neolithic Grooved Ware sites traced through organic residues in potsherds

Gas chromatography (GC), GC-mass spectrometry (GC-MS) and GC-combustion-isotope ratio MS (GC-C-IRMS) analyses of absorbed and surface lipid residues preserved in potsherds were used to explore the extent of pig product processing exploitation in the later British Neolithic Grooved Ware tradition. Assessments were made regarding whether porcine lipids were associated with specific Grooved Ware traits, i.e. decoration, substyle, geographical area and type of site. Two hundred and twenty-two Grooved Ware potsherds were analysed, 70% of which contained lipid concentrations considered significant (>5 μg g⁻¹). All the lipid residues were dominated by animal fats, although plant and beeswax were also detected in a small number of extracts. δ¹³C values of the major fatty acid components of degraded animal fats (C_16:0 and C_18:0) were determined for 126 extracts and used to assign ruminant or porcine origins to the residues; 16% of these were found to have a predominantly porcine isotope signature. Statistical associations with pig exploitation were shown to exist with substyle, geographical area and site type, whereas, no relationship was seen between decoration and the type of commodity processed. Intact triacylglycerols were preserved in 19% of the sherds; half of these had distributions consistent with the identifications based on δ¹³C values, the remainder differed either due to the presence of mixed commodities or because lower molecular weight homologues had been lost due to degradation. In addition to the detection of pig exploitation, results from lipid residue analysis showed a good correlation with faunal assemblages, suggesting that stable isotope analysis may be used as a proxy for animal exploitation at sites where bones have not survived.     

A DNA test for sex identification in cattle confirms osteometric results

It is of vital importance to be able to sex identify cattle remains to understand the strategies and importance of cattle husbandry in an ancient society. This is usually done from osteoarchaeological assemblages and often relies on measurements of metapodials. The breadth measurement of the distal trochlea is considered an easy way to identify the sex. Bones from males appears to be easily distinguishable from female counterparts, although it has been complicated to find an external control for the morphological results. Here we investigate the reliability of these particular morphometrics for sex identifying cattle bones with molecular genetics. We use a sex discriminating single nucleotide polymorphism in the ZFXY gene and we apply it to DNA from the bones. To keep the fragment size short and suitable for ancient DNA we base the test on a SNP. The test confirms the osteological sex identification in all cases were DNA could be retrieved. This molecular method can also be used when no fragments suitable for osteological sex identification can be found or when the measurements are non-conclusive.     

Morphological changes in domestic cattle in Gaul,from the second century BC to the fifth century AD: diversity of herds in the Seine valley (France) and northern Gaul

In Western Europe the transition from the Iron Age to the Roman period is the scene of a rapid economic and agro-pastoral evolution characterized in particular by a modification in the shape of the cattle. Understanding this phenomenon, its implementation mechanisms and development dynamics represents a major challenge in archaeozoology. In our study a local and regional approach of the evolution in cattle morphology is carried out first on the scale of the middle Seine valley, then of the northern Gaul. Its purpose is to observe and compare the evolution rates in domestic cattle between Middle La Tène and the fifth century AD, and with the help of a tight chronological and geographical grid, to estimate to what extent the shape of the cattle has been influenced by the indigenous cultures, the Roman economic pattern or even the environment. This osteometrical study is based on the Log Size Index method and on a measurement corpus of 12,969 bones collected on sites located on 117 communes in France (for most of them), Belgium, the Netherlands and Switzerland. The results we obtained show local specificities in terms of breeding methods and animal morphologies, observed on a very fine scale and taking place long before the Conquest. Moreover the growth patterns of the various herds happen to be different and to evolve under the impetus of the developing Roman economic pattern. This work thus points out an essential aspect of the agro-pastoral turmoil that took place in Gaul at the turning point of our era. The Roman pattern is not the cause of the morphological changes of the cattle, nor of the diversity in cattle shapes in Gaul, but it provokes a reshaping of the agricultural systems and a redefining of the breeding strategies which boost and completely change the cattle growth patterns.     

Changes in survival of cattle (Bos taurus) during Medieval times in two Norwegian cities

Abstract

Bones (diaphyses) have epiphyses that fuse at a given age. This indicates if the animal was older or younger than the age of fusion for that specific epiphysis at death. In this short contribution, we present a new methodology to calculate survival/mortality of cattle on the basis of epiphysial fusion. We used cattle bones, excavated in two Norwegian cities, Oslo and Trondheim, to calculate survival and changes in mortality for cattle during the period from AD1000 to AD1624. This is based on standard logistic regression models, using a complementary log–log link and the log of age of fusion of the epiphyses as independent variable, an approach recognised as a ‘Weibull-model for current-status-data’. Mortality of cattle was higher in the city of Trondheim than in Oslo. For both cities the mortality of cattle decreased, and the life-span increased, during the period from the AD1000 until AD1350. In Oslo, mortality after 1350 was similar to that between 1150 and 1250, while in Trondheim, it was similar to the mortality in the period from 1250 to 1350. We have shown that mortality curves can be calculated using epiphysial fusion data, and using this approach have demonstrated a change in cattle mortality which corresponds to significant historic events during the medieval period.     

Cattle in the West African savanna: evidence from 1st millennium CE Kirikongo, Burkina Faso

The West African sahel and savanna are today home to diverse cattle breeds derived from complex social, political and environmental processes over at least the past four thousand years. Current evidence from the sahel and its floodplains indicates multiple sizes of cattle over time that may correspond to modern breeds. However, little is known about the cattle further south in the savanna, such as the West African Shorthorn. These humpless cattle are well adapted to the environmental conditions of more humid zones, including their significant resistance to trypanosomiasis, or sleeping sickness. In this paper I present new archaeozoological data from the Iron Age village of Kirikongo, Burkina Faso (100-1700 CE) that indicate the presence of small cattle in the 1st millennium CE similar in size to West African Shorthorn. These results are contextualized through comparisons with other archaeological sites and environmental data in Central West Africa, suggesting that small cattle are generally associated with the savanna environment over time, and their distributions may have oscillated with climatic changes. Lastly, interregional processes are assessed given Kirikongo’s evidence for small savanna cattle in western Burkina Faso and their subsequent adoption in the Inland Niger Delta of Mali.