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https://www.readbyqxmd.com/read/28070563/gut-microbiome-of-the-canadian-arctic-inuit
#1
Catherine Girard, Nicolas Tromas, Marc Amyot, B Jesse Shapiro
Diet is a major determinant of community composition in the human gut microbiome, and "traditional" diets have been associated with distinct and highly diverse communities, compared to Western diets. However, most traditional diets studied have been those of agrarians and hunter-gatherers consuming fiber-rich diets. In contrast, the Inuit of the Canadian Arctic have been consuming a traditional diet low in carbohydrates and rich in animal fats and protein for thousands of years. We hypothesized that the Inuit diet and lifestyle would be associated with a distinct microbiome...
January 2017: MSphere
https://www.readbyqxmd.com/read/28063234/hadza-sleep-biology-evidence-for-flexible-sleep-wake-patterns-in-hunter-gatherers
#2
David R Samson, Alyssa N Crittenden, Ibrahim A Mabulla, Audax Z P Mabulla, Charles L Nunn
OBJECTIVES: Cross-cultural sleep research is critical to deciphering whether modern sleep expression is the product of recent selective pressures, or an example of evolutionary mismatch to ancestral sleep ecology. We worked with the Hadza, an equatorial, hunter-gatherer community in Tanzania, to better understand ancestral sleep patterns and to test hypotheses related to sleep segmentation. METHODS: We used actigraphy to analyze sleep-wake patterns in thirty-three volunteers for a total of 393 days...
January 7, 2017: American Journal of Physical Anthropology
https://www.readbyqxmd.com/read/28049708/modeling-human-population-separation-history-using-physically-phased-genomes
#3
Shiya Song, Elzbieta Sliwerska, Sarah Emery, Jeffrey M Kidd
Phased haplotype sequences are a key component in many population genetic analyses since variation in haplotypes reflects the action of recombination, selection, and changes in population size. In humans, haplotypes are typically estimated from unphased sequence or genotyping data using statistical models applied to large reference panels. To assess the importance of correct haplotype phase on population history inference, we performed fosmid pool sequencing and resolved phased haplotypes of five individuals from diverse African populations (including Yoruba, Esan, Gambia, Maasai, and Mende)...
January 2017: Genetics
https://www.readbyqxmd.com/read/28029148/investigating-mitochondrial-dna-relationships-in-neolithic-western-europe-through-serial-coalescent-simulations
#4
Maïté Rivollat, Stéphane Rottier, Christine Couture, Marie-Hélène Pemonge, Fanny Mendisco, Mark G Thomas, Marie-France Deguilloux, Pascale Gerbault
Recent ancient DNA studies on European Neolithic human populations have provided persuasive evidence of a major migration of farmers originating from the Aegean, accompanied by sporadic hunter-gatherer admixture into early Neolithic populations, but increasing toward the Late Neolithic. In this context, ancient mitochondrial DNA data collected from the Neolithic necropolis of Gurgy (Paris Basin, France), the largest mitochondrial DNA sample obtained from a single archeological site for the Early/Middle Neolithic period, indicate little differentiation from farmers associated to both the Danubian and Mediterranean Neolithic migration routes, as well as from Western European hunter-gatherers...
December 28, 2016: European Journal of Human Genetics: EJHG
https://www.readbyqxmd.com/read/28028536/engineered-feature-used-to-enhance-gardening-at-a-3800-year-old-site-on-the-pacific-northwest-coast
#5
Tanja Hoffmann, Natasha Lyons, Debbie Miller, Alejandra Diaz, Amy Homan, Stephanie Huddlestan, Roma Leon
Humans use a variety of deliberate means to modify biologically rich environs in pursuit of resource stability and predictability. Empirical evidence suggests that ancient hunter-gatherer populations engineered ecological niches to enhance the productivity and availability of economically significant resources. An archaeological excavation of a 3800-year-old wetland garden in British Columbia, Canada, provides the first direct evidence of an engineered feature designed to facilitate wild plant food production among mid-to-late Holocene era complex fisher-hunter-gatherers of the Northwest Coast...
December 2016: Science Advances
https://www.readbyqxmd.com/read/27994175/phylogeography-genetic-diversity-and-demographic-history-of-the-iranian-kurdish-groups-based-on-mtdna-sequences
#6
Fatah Zarei, Hassan Rajabi-Maham
Throughout the history of modern humans, the current Kurdish-inhabited area has served as part of a tricontinental crossroad for major human migrations. Also, a significant body of archaeological evidence points to this area as the site of Neolithic transition. To investigate the phylogeography, origins and demographic history, mtDNA D-loop region of individuals representing four Kurdish groups from Iran were analysed. Our data indicated that most of the Kurds mtDNA lineages belong to branches of the haplogroups with the Western Eurasian origin; with small fractions of the Eastern Eurasian and sub-Saharan African lineages...
December 2016: Journal of Genetics
https://www.readbyqxmd.com/read/27991880/earliest-direct-evidence-of-plant-processing-in-prehistoric-saharan-pottery
#7
Julie Dunne, Anna Maria Mercuri, Richard P Evershed, Silvia Bruni, Savino di Lernia
The invention of thermally resistant ceramic cooking vessels around 15,000 years ago was a major advance in human diet and nutrition(1-3), opening up new food groups and preparation techniques. Previous investigations of lipid biomarkers contained in food residues have routinely demonstrated the importance of prehistoric cooking pots for the processing of animal products across the world(4). Remarkably, however, direct evidence for plant processing in prehistoric pottery has not been forthcoming, despite the potential to cook otherwise unpalatable or even toxic plants(2,5)...
December 19, 2016: Nature Plants
https://www.readbyqxmd.com/read/27966200/review-of-demography-and-evolutionary-ecology-of-hadza-hunter-gatherers-by-nicholas-blurton-jones-cambridge-university-press-2016
#8
Monique Borgerhoff Mulder
No abstract text is available yet for this article.
December 13, 2016: Human Nature: An Interdisciplinary Biosocial Perspective
https://www.readbyqxmd.com/read/27965293/reconstructing-genetic-history-of-siberian-and-northeastern-european-populations
#9
Emily H M Wong, Andrey Khrunin, Larissa Nichols, Dmitry Pushkarev, Denis Khokhrin, Dmitry Verbenko, Oleg Evgrafov, James Knowles, John Novembre, Svetlana Limborska, Anton Valouev
Siberia and Northwestern Russia are home to over 40 culturally and linguistically diverse indigenous ethnic groups, yet genetic variation and histories of peoples from this region are largely uncharacterized. We present deep whole-genome sequencing data (∼38×) from 28 individuals belonging to 14 distinct indigenous populations from that region. We combined these data sets with additional 32 modern-day and 46 ancient human genomes to reconstruct genetic histories of several indigenous Northern Eurasian populations...
January 2017: Genome Research
https://www.readbyqxmd.com/read/27960261/a-concise-history-of-mycotoxin-research
#10
John I Pitt, J David Miller
Toxigenic fungi and mycotoxins entered human food supplies about the time when mankind first began to cultivate crops and to store them from one season to the next, perhaps 10,000 years ago. The storage of cereals probably initiated the transition by mankind from hunter-gatherer to cultivator, at the same time providing a vast new ecological niche for fungi pathogenic on grain crops or saprophytic on harvested grain, many of which produced mycotoxins. Grains have always been the major source of mycotoxins in the diet of man and his domestic animals...
December 27, 2016: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/27902716/large-scale-anthropogenic-reduction-of-forest-cover-in-last-glacial-maximum-europe
#11
Jed O Kaplan, Mirjam Pfeiffer, Jan C A Kolen, Basil A S Davis
Reconstructions of the vegetation of Europe during the Last Glacial Maximum (LGM) are an enigma. Pollen-based analyses have suggested that Europe was largely covered by steppe and tundra, and forests persisted only in small refugia. Climate-vegetation model simulations on the other hand have consistently suggested that broad areas of Europe would have been suitable for forest, even in the depths of the last glaciation. Here we reconcile models with data by demonstrating that the highly mobile groups of hunter-gatherers that inhabited Europe at the LGM could have substantially reduced forest cover through the ignition of wildfires...
2016: PloS One
https://www.readbyqxmd.com/read/27900469/holocene-changes-in-the-trophic-ecology-of-an-apex-marine-predator-in-the-south-atlantic-ocean
#12
Damián G Vales, Luis Cardona, Atilio F Zangrando, Florencia Borella, Fabiana Saporiti, R Natalie P Goodall, Larissa Rosa de Oliveira, Enrique A Crespo
Predators may modify their diets as a result of both anthropogenic and natural environmental changes. Stable isotope ratios of nitrogen and carbon in bone collagen have been used to reconstruct the foraging ecology of South American fur seals (Arctocephalus australis) in the southwestern South Atlantic Ocean since the Middle Holocene, a region inhabited by hunter-gatherers by millennia and modified by two centuries of whaling, sealing and fishing. Results suggest that the isotopic niche of fur seals from Patagonia has not changed over the last two millennia (average for the period: δ(13)C2200-0BP = -13...
November 29, 2016: Oecologia
https://www.readbyqxmd.com/read/27891602/cannabimimetic-phytochemicals-in-the-diet-an-evolutionary-link-to-food-selection-and-metabolic-stress-adaptation
#13
REVIEW
Jürg Gertsch
The endocannabinoid system (ECS) is a major lipid signalling network that plays important pro-homeostatic (allostatic) roles not only in the nervous system but also in peripheral organs. There is increasing evidence that there is a dietary component in the modulation of the ECS. Cannabinoid receptors in hominids co-evolved with diet, and the ECS constitutes a feedback loop for food selection and energy metabolism. Here, it is postulated that the mismatch of ancient lipid genes of hunter-gatherers and pastoralists with the high-carbohydrate diet introduced by agriculture could be compensated for via dietary modulation of the ECS...
November 27, 2016: British Journal of Pharmacology
https://www.readbyqxmd.com/read/27886812/foraging-potential-of-underground-storage-organ-plants-in-the-southern-cape-south-africa
#14
Elzanne Singels, Alastair J Potts, Richard M Cowling, Curtis W Marean, Jan De Vynck, Karen J Esler
Underground storage organs (USOs) serve as a staple source of carbohydrates for many hunter-gatherer societies and they feature prominently in discussions of diets of early modern humans. While the way of life of hunter-gatherers in South Africa's Cape no longer exists, there is extensive ethnographic, historical, and archaeological evidence of hunter-gatherers' use of USOs. This is to be expected, given that the Cape supports the largest concentration of plant species with USOs globally. The southern Cape is the location of several Middle Stone Age sites that are highly significant to research on the origins of behaviourally modern humans, and this provided the context for our research...
December 2016: Journal of Human Evolution
https://www.readbyqxmd.com/read/27880839/composite-sickles-and-cereal-harvesting-methods-at-23-000-years-old-ohalo-ii-israel
#15
Iris Groman-Yaroslavski, Ehud Weiss, Dani Nadel
Use-wear analysis of five glossed flint blades found at Ohalo II, a 23,000-years-old fisher-hunter-gatherers' camp on the shore of the Sea of Galilee, Northern Israel, provides the earliest evidence for the use of composite cereal harvesting tools. The wear traces indicate that tools were used for harvesting near-ripe semi-green wild cereals, shortly before grains are ripe and disperse naturally. The studied tools were not used intensively, and they reflect two harvesting modes: flint knives held by hand and inserts hafted in a handle...
2016: PloS One
https://www.readbyqxmd.com/read/27821432/inferring-heterozygosity-from-ancient-and-low-coverage-genomes
#16
Athanasios Kousathanas, Christoph Leuenberger, Vivian Link, Christian Sell, Joachim Burger, Daniel Wegmann
While genetic diversity can be quantified accurately from high coverage sequencing data, it is often desirable to obtain such estimates from data with low coverage, either to save costs or because of low DNA quality, as is observed for ancient samples. Here, we introduce a method to accurately infer heterozygosity probabilistically from sequences with average coverage [Formula: see text] of a single individual. The method relaxes the infinite sites assumption of previous methods, does not require a reference sequence, except for the initial alignment of the sequencing data, and takes into account both variable sequencing errors and potential postmortem damage...
January 2017: Genetics
https://www.readbyqxmd.com/read/27790997/resource-scarcity-drives-lethal-aggression-among-prehistoric-hunter-gatherers-in-central-california
#17
Mark W Allen, Robert Lawrence Bettinger, Brian F Codding, Terry L Jones, Al W Schwitalla
The origin of human violence and warfare is controversial, and some scholars contend that intergroup conflict was rare until the emergence of sedentary foraging and complex sociopolitical organization, whereas others assert that violence was common and of considerable antiquity among small-scale societies. Here we consider two alternative explanations for the evolution of human violence: (i) individuals resort to violence when benefits outweigh potential costs, which is likely in resource poor environments, or (ii) participation in violence increases when there is coercion from leaders in complex societies leading to group level benefits...
October 25, 2016: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/27783683/site-formation-processes-and-hunter-gatherers-use-of-space-in-a-tropical-environment-a-geo-ethnoarchaeological-approach-from-south-india
#18
David E Friesem, Noa Lavi, Marco Madella, P Ajithprasad, Charles French
Hunter-gatherer societies have distinct social perceptions and practices which are expressed in unique use of space and material deposition patterns. However, the identification of archaeological evidence associated with hunter-gatherer activity is often challenging, especially in tropical environments such as rainforests. We present an integrated study combining ethnoarchaeology and geoarchaeology in order to study archaeological site formation processes related to hunter-gatherers' ways of living in tropical forests...
2016: PloS One
https://www.readbyqxmd.com/read/27783225/odor-color-associations-differ-with-verbal-descriptors-for-odors-a-comparison-of-three-linguistically-diverse-groups
#19
Josje M de Valk, Ewelina Wnuk, John L A Huisman, Asifa Majid
People appear to have systematic associations between odors and colors. Previous research has emphasized the perceptual nature of these associations, but little attention has been paid to what role language might play. It is possible odor-color associations arise through a process of labeling; that is, participants select a descriptor for an odor and then choose a color accordingly (e.g., banana odor → "banana" label → yellow). If correct, this would predict odor-color associations would differ as odor descriptions differ...
October 25, 2016: Psychonomic Bulletin & Review
https://www.readbyqxmd.com/read/27772897/the-aboriginal-hunter-gatherer-lifestyle-lessons-for-chronic-disease-prevention
#20
Kerin O'Dea
No abstract text is available yet for this article.
February 2016: Pathology
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