Studies on Amerindian dogs, 2: Variation in early peruvian dogs

Remains of dogs have been discovered in Peru for over a hundred years, but relatively little information is available on them. Dating evidence, especially by the radiocarbon method, suggests that the skulls of dogs considered in detail here range from 1030 BC to 1324 AD, with the majority belonging to the past two millennia. Craniometric information is presented on a series of early Peruvian specimens now preserved in Lima and London, representing the majority of material as yet unpublished, and the largest sample so far studied. Additional Peruvian data were also collected from the literature, as well as comparable information on some other Amerindian dog series. It has been possible to indicate that two distinct forms are represented in the Peruvian material.     

Hydrogen isotope systematics of hair: archeological and forensic applications

The hydrogen isotope systematics of hair have been explored and several applications demonstrate the type of information that can be recovered from archeological and forensic hair samples. Experiment with modern hair demonstrate that sources of protein-based hydrogen in keratin are food and water. On the basis of a deuterium-enriched drinking study, it was found that 31% of hydrogen in human hair is derived from ingested water. At least 9% of total hydrogen in human hair is isotopically exchangeable with water or water vapor at 25 °C. Nearly complete exchange occurs in a matter of hours. The δD value of body water is approximately 17±10‰ (n=7) more negative than human hair, although there is much scatter in data for modern hair, which is clearly related to variability of the isotopic composition of ingested food and water. Archeological hair samples were analyzed from (i) a 370 year old Incan mummy sacrificed at 5300 m altitude in Argentina (Geoarchaeology 14 (1999) 27) and (ii) from a Woolly Mammoth from Siberia. High spatial resolution data along the length of hair from the mummy indicate seasonal variations in carbon, nitrogen and hydrogen isotope ratios. No hydrogen isotope anomalies are seen in the youngest hair at the base of the scalp, indicating that the individual probably lived at 1600 m, and spent less than a week at high altitudes before death. The mammoth also preserves a seasonal signal, suggesting hair growth rates of 33 cm/year, faster than human hair, but slower than horse tail hair. The limited isotopic range across seasons for the mammoth is consistent with a north-south migration on the order of 1000 km.     

Landscape bioarchaeology at Pacatnamu,Peru: inferring mobility from δC and δN values of hair

Stable carbon- and nitrogen-isotope ratios were measured for segments along the shafts of hair from eight individuals from the site of Pacatnamu, located in the Jequetepeque Valley on the north coast of Peru. All are from known grave contexts dating from Moche (ca. 450–750 A.D.) to Lambayeque periods (ca. 900–1100 A.D.). The mean δ¹³C and δ¹⁵N values of hair segments from individuals are comparable to those of bone, and demonstrate increased consumption of marine resources in the Lambayeque times relative to the Moche period.     

Isotopic Determination of Seasonality in Diet and Death from Nubian Mummy Hair

Sections of human hair from naturally desiccated Sudanese Nubian mummies representing X-Group (AD 350-550) and Christian (AD 550-1300) periods in the Wadi Halfa area have been analysed for their isotope ratios. Because the carbon in hair represents food intake over the growth period of this tissue, analysis comparing segments taken next to the scalp with those further along the shaft can indicate diet just prior to death as well as any recent shift in food consumption. Modern populations in this area practise seasonal crop scheduling which involves the cultivation of C₃ plants (wheat, barley and most fruits and vegetables) in the winter and the hardier C₄ plants (sorghum and millet) in the summer. Shifting isotopic values along the length of hair strands of the ancient inhabitants of this area demonstrate that this practice has its roots at least as far back as the Initial Phase of Intensive Agriculture. The most common season of death appears to have been summer, the time of greatest climatic, nutritional and physiological stress for both ancient and modern inhabitants.     

Identification of psychoactive alkaloids in ancient Andean human hair by gas chromatography/mass spectrometry

Various ethnographic sources have demonstrated the symbolic and ritualistic importance of psychoactive plants in Native American societies. The social milieu of these mind- altering plants appears to be ancient. Archaeological evidence during the Tiwanaku empire expansion along the Atacama Desert of Chile, circa 500–1000 A.D., shows the presence of highly decorated snuffing tablets and tubes as grave goods. The preservation of mummified human bodies in the Azapa Valley, northern Chile, provided an opportunity to test the exact nature of the psychoactive plants used in this region. Using gas chromatography/mass spectrometry (GC–MS), here we show that ancient Andean populations from northern Chile consumed Banisteriopsis, a vine that contains harmine. This is the first direct archaeological evidence of hallucinogenic and medicinal ethnographic practices. Interestingly enough, this rainforest plant does not grow along the Atacama coast, thus our findings suggest extensive plant trade networks in antiquity as far as the Amazon.     

Flax look‐alikes: Pitfalls of ancient plant fibre identification

Plant fibres have been used since ancient times in numerous applications ranging from nets and basketry to textiles for clothing. A proper identification of plant fibre remains in archaeological excavations provides important information about resource exploitation and agriculture. In order to identify plant fibres, a series of fibre features—cross‐section diameter, lumen diameter, dislocations (nodes), cross markings, cross‐section shape and lumen shape—have been defined and characteristic traits of these features for different fibre types established. How suitable these traits really are for fibre identification has been a matter of debate. To resolve this issue, we have performed a systematic investigation of typical textile bast fibres: flax, nettle and hemp. We have investigated cross‐section diameter, lumen diameter, dislocations (nodes) and cross markings using standard compound, white light transmission microscopy. Our investigations show that all the traits that are considered characteristic for one type of plant fibre can also, on occasion, be found in other types. This demonstrates that an investigation of the traits listed above is not sufficient to ensure a correct identification of the plant fibre material; in particular, when only a small amount of material is available. This is often the case in archaeological excavations.     

Dietary shifting in the Nasca Region as inferred from the carbon- and nitrogen-isotope compositions of archaeological hair and bone

The topography of the Andean Region results in short travelling distances among ecologically distinct production zones. As such, it is possible to infer relative changes in residence based on the spatial variability in the isotopic composition of food resources. Here, we determine long-term diet through carbon- and nitrogen-isotope analysis of bone collagen for twenty-nine individuals from Cahuachi, an important ceremonial centre in the Nasca Region. We also reconstruct the temporal sequence of change in dietary isotopic compositions along hair samples for seventeen individuals buried at Cahuachi and the neighbouring site of Huaca del Loro.     

Is It Hop? Identifying Hop Fibres in a European Historical Context

Hop (Humulus lupulus L.) is an ancient perennial crop plant, native to the Northern Hemisphere. The archaeological evidence dates back to at least the sixth century ad in Europe. Hop has been used for beer brewing, in sleeping draughts, as bedding and for antibacterial purposes. Less known is that hop fibres have also been used for textiles and paper. However, it is difficult to distinguish hop from other bast fibres. Here, we present a set of fibre features, which, when found together in an archaeological/historical material within a European context, provide a strong indication that the fibres are hop.     

Assessing individual systemic stress through cortisol analysis of archaeological hair

As a product of physiological status and the social and physical environments, stress has significant impact on health and well-being in both ancient and contemporary societies. In bioarchaeological research, stress is characterized using an array of skeletal indicators that record stressful periods during childhood and adulthood. In modern clinical research, exposure to stress can be assessed using systemic cortisol levels that have been shown to fluctuate in response to experienced stress. Analysis of cortisol levels in archaeological hair should enable assessment of stress during a short, but critical, period of an individual's life. For this pilot study, we selected hair samples from ten individuals from five different archaeological sites in Peru, and analyzed them in segments to determine cortisol levels. These data demonstrate that it is possible to observe biogenic patterns of cortisol production, and that individual experiences of stress can be reconstructed for the period of time represented by each hair sample. Analysis of cortisol levels in hair has the potential to be a valuable short-term dynamic stress indicator that will complement paleopathological and biochemical studies of health and stress, and permit the reconstruction of increasingly detailed life histories.