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https://www.readbyqxmd.com/read/28426763/individual-based-modelling-of-population-growth-and-diffusion-in-discrete-time
#1
Natalie Tkachenko, John D Weissmann, Wesley P Petersen, George Lake, Christoph P E Zollikofer, Simone Callegari
Individual-based models (IBMs) of human populations capture spatio-temporal dynamics using rules that govern the birth, behavior, and death of individuals. We explore a stochastic IBM of logistic growth-diffusion with constant time steps and independent, simultaneous actions of birth, death, and movement that approaches the Fisher-Kolmogorov model in the continuum limit. This model is well-suited to parallelization on high-performance computers. We explore its emergent properties with analytical approximations and numerical simulations in parameter ranges relevant to human population dynamics and ecology, and reproduce continuous-time results in the limit of small transition probabilities...
2017: PloS One
https://www.readbyqxmd.com/read/28426286/on-the-evolution-of-lactase-persistence-in-humans
#2
Laure Ségurel, Céline Bon
Lactase persistence-the ability of adults to digest the lactose in milk-varies widely in frequency across human populations. This trait represents an adaptation to the domestication of dairying animals and the subsequent consumption of their milk. Five variants are currently known to underlie this phenotype, which is monogenic in Eurasia but mostly polygenic in Africa. Despite being a textbook example of regulatory convergent evolution and gene-culture coevolution, the story of lactase persistence is far from clear: Why are lactase persistence frequencies low in Central Asian herders but high in some African hunter-gatherers?Whywas lactase persistence strongly selected for even though milk processing can reduce the amount of lactose? Are there other factors, outside of an advantage of caloric intake, that contributed to the selective pressure for lactase persistence? It is time to revisit what we know and still do not know about lactase persistence in humans...
April 19, 2017: Annual Review of Genomics and Human Genetics
https://www.readbyqxmd.com/read/28424643/oral-storytelling-as-evidence-of-pedagogy-in-forager-societies
#3
Michelle Scalise Sugiyama
Teaching is reportedly rare in hunter-gatherer societies, raising the question of whether it is a species-typical trait in humans. A problem with past studies is that they tend to conceptualize teaching in terms of Western pedagogical practices. In contrast, this study proceeds from the premise that teaching requires the ostensive manifestation of generalizable knowledge: the teacher must signal intent to share information, indicate the intended recipient, and transmit knowledge that is applicable beyond the present context...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/28407013/dietary-resilience-among-hunter-gatherers-of-tierra-del-fuego-isotopic-evidence-in-a-diachronic-perspective
#4
Mary Anne Tafuri, Atilio Francisco Javier Zangrando, Augusto Tessone, Sayuri Kochi, Jacopo Moggi Cecchi, Fabio Di Vincenzo, Antonio Profico, Giorgio Manzi
The native groups of Patagonia have relied on a hunter-gatherer economy well after the first Europeans and North Americans reached this part of the world. The large exploitation of marine mammals (i.e., seals) by such allochthonous groups has had a strong impact on the local ecology in a way that might have forced the natives to adjust their subsistence strategies. Similarly, the introduction of new foods might have changed local diet. These are the premises of our isotopic-based analysis. There is a large set of paleonutritional investigations through isotopic analysis on Fuegians groups, however a systematic exploration of food practices across time in relation to possible pre- and post-contact changes is still lacking...
2017: PloS One
https://www.readbyqxmd.com/read/28387361/origin-and-spread-of-human-mitochondrial-dna-haplogroup-u7
#5
Hovhannes Sahakyan, Baharak Hooshiar Kashani, Rakesh Tamang, Alena Kushniarevich, Amirtharaj Francis, Marta D Costa, Ajai Kumar Pathak, Zaruhi Khachatryan, Indu Sharma, Mannis van Oven, Jüri Parik, Hrant Hovhannisyan, Ene Metspalu, Erwan Pennarun, Monika Karmin, Erika Tamm, Kristiina Tambets, Ardeshir Bahmanimehr, Tuuli Reisberg, Maere Reidla, Alessandro Achilli, Anna Olivieri, Francesca Gandini, Ugo A Perego, Nadia Al-Zahery, Massoud Houshmand, Mohammad Hossein Sanati, Pedro Soares, Ekta Rai, Jelena Šarac, Tena Šarić, Varun Sharma, Luisa Pereira, Veronica Fernandes, Viktor Černý, Shirin Farjadian, Deepankar Pratap Singh, Hülya Azakli, Duran Üstek, Natalia Ekomasova Trofimova, Ildus Kutuev, Sergei Litvinov, Marina Bermisheva, Elza K Khusnutdinova, Niraj Rai, Manvendra Singh, Vijay Kumar Singh, Alla G Reddy, Helle-Viivi Tolk, Svjetlana Cvjetan, Lovorka Barac Lauc, Pavao Rudan, Emmanuel N Michalodimitrakis, Nicholas P Anagnou, Kalliopi I Pappa, Maria V Golubenko, Vladimir Orekhov, Svetlana A Borinskaya, Katrin Kaldma, Monica A Schauer, Maya Simionescu, Vladislava Gusar, Elena Grechanina, Periyasamy Govindaraj, Mikhail Voevoda, Larissa Damba, Swarkar Sharma, Lalji Singh, Ornella Semino, Doron M Behar, Levon Yepiskoposyan, Martin B Richards, Mait Metspalu, Toomas Kivisild, Kumarasamy Thangaraj, Phillip Endicott, Gyaneshwer Chaubey, Antonio Torroni, Richard Villems
Human mitochondrial DNA haplogroup U is among the initial maternal founders in Southwest Asia and Europe and one that best indicates matrilineal genetic continuity between late Pleistocene hunter-gatherer groups and present-day populations of Europe. While most haplogroup U subclades are older than 30 thousand years, the comparatively recent coalescence time of the extant variation of haplogroup U7 (~16-19 thousand years ago) suggests that its current distribution is the consequence of more recent dispersal events, despite its wide geographical range across Europe, the Near East and South Asia...
April 7, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28374451/dental-wear-and-age-grading-at-roonka-south-australia
#6
Judith Littleton
OBJECTIVES: In many hunter-gatherer populations, the teeth are used as a third hand or a tool. Much attention has been paid to wear and its relationship to gendered division of labor, but age is also a significant organizing factor in many societies. In this article, I analyze whether the pattern of wear at Roonka, Australia, reflects the age-graded acquisition of tasks. MATERIALS AND METHODS: The remains analyzed come from Roonka and date from c6000 BP to 150 BP...
April 4, 2017: American Journal of Physical Anthropology
https://www.readbyqxmd.com/read/28366199/favorable-ecological-circumstances-promote-life-expectancy-in-chimpanzees-similar-to-that-of-human-hunter-gatherers
#7
Brian M Wood, David P Watts, John C Mitani, Kevin E Langergraber
Demographic data on wild chimpanzees are crucial for understanding the evolution of chimpanzee and hominin life histories, but most data come from populations affected by disease outbreaks and anthropogenic disturbance. We present survivorship data from a relatively undisturbed and exceptionally large community of eastern chimpanzees (Pan troglodytes schweinfurthii) at Ngogo, Kibale National Park, Uganda. We monitored births, deaths, immigrations, and emigrations in the community between 1995 and 2016. Using known and estimated ages, we calculated survivorship curves for the whole community, for males and females separately, and for individuals ≤2 years old when identified...
April 2017: Journal of Human Evolution
https://www.readbyqxmd.com/read/28362000/emergence-and-evolution-of-cooperation-under-resource-pressure
#8
María Pereda, Débora Zurro, José I Santos, Ivan Briz I Godino, Myrian Álvarez, Jorge Caro, José M Galán
We study the influence that resource availability has on cooperation in the context of hunter-gatherer societies. This paper proposes a model based on archaeological and ethnographic research on resource stress episodes, which exposes three different cooperative regimes according to the relationship between resource availability in the environment and population size. The most interesting regime represents moderate survival stress in which individuals coordinate in an evolutionary way to increase the probabilities of survival and reduce the risk of failing to meet the minimum needs for survival...
March 31, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28355257/lithic-technological-responses-to-late-pleistocene-glacial-cycling-at-pinnacle-point-site-5-6-south-africa
#9
Jayne Wilkins, Kyle S Brown, Simen Oestmo, Telmo Pereira, Kathryn L Ranhorn, Benjamin J Schoville, Curtis W Marean
There are multiple hypotheses for human responses to glacial cycling in the Late Pleistocene, including changes in population size, interconnectedness, and mobility. Lithic technological analysis informs us of human responses to environmental change because lithic assemblage characteristics are a reflection of raw material transport, reduction, and discard behaviors that depend on hunter-gatherer social and economic decisions. Pinnacle Point Site 5-6 (PP5-6), Western Cape, South Africa is an ideal locality for examining the influence of glacial cycling on early modern human behaviors because it preserves a long sequence spanning marine isotope stages (MIS) 5, 4, and 3 and is associated with robust records of paleoenvironmental change...
2017: PloS One
https://www.readbyqxmd.com/read/28355249/barley-hordeum-vulgare-in-the-okhotsk-culture-5th-10th-century-ad-of-northern-japan-and-the-role-of-cultivated-plants-in-hunter-gatherer-economies
#10
Christian Leipe, Elena A Sergusheva, Stefanie Müller, Robert N Spengler, Tomasz Goslar, Hirofumi Kato, Mayke Wagner, Andrzej W Weber, Pavel E Tarasov
This paper discusses archaeobotanical remains of naked barley recovered from the Okhotsk cultural layers of the Hamanaka 2 archaeological site on Rebun Island, northern Japan. Calibrated ages (68% confidence interval) of the directly dated barley remains suggest that the crop was used at the site ca. 440-890 cal yr AD. Together with the finds from the Oumu site (north-eastern Hokkaido Island), the recovered seed assemblage marks the oldest well-documented evidence for the use of barley in the Hokkaido Region...
2017: PloS One
https://www.readbyqxmd.com/read/28348225/origins-of-house-mice-in-ecological-niches-created-by-settled-hunter-gatherers-in-the-levant-15-000-y-ago
#11
Lior Weissbrod, Fiona B Marshall, François R Valla, Hamoudi Khalaily, Guy Bar-Oz, Jean-Christophe Auffray, Jean-Denis Vigne, Thomas Cucchi
Reductions in hunter-gatherer mobility during the Late Pleistocene influenced settlement ecologies, altered human relations with animal communities, and played a pivotal role in domestication. The influence of variability in human mobility on selection dynamics and ecological interactions in human settlements has not been extensively explored, however. This study of mice in modern African villages and changing mice molar shapes in a 200,000-y-long sequence from the Levant demonstrates competitive advantages for commensal mice in long-term settlements...
March 27, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28345756/the-dawn-of-dentistry-in-the-late-upper-paleolithic-an-early-case-of-pathological-intervention-at-riparo-fredian
#12
Gregorio Oxilia, Flavia Fiorillo, Francesco Boschin, Elisabetta Boaretto, Salvatore A Apicella, Chiara Matteucci, Daniele Panetta, Rossella Pistocchi, Franca Guerrini, Cristiana Margherita, Massimo Andretta, Rita Sorrentino, Giovanni Boschian, Simona Arrighi, Irene Dori, Giuseppe Mancuso, Jacopo Crezzini, Alessandro Riga, Maria C Serrangeli, Antonino Vazzana, Piero A Salvadori, Mariangela Vandini, Carlo Tozzi, Adriana Moroni, Robin N M Feeney, John C Willman, Jacopo Moggi-Cecchi, Stefano Benazzi
OBJECTIVES: Early evidence for the treatment of dental pathology is found primarily among food-producing societies associated with high levels of oral pathology. However, some Late Pleistocene hunter-gatherers show extensive oral pathology, suggesting that experimentation with therapeutic dental interventions may have greater antiquity. Here, we report the second earliest probable evidence for dentistry in a Late Upper Paleolithic hunter-gatherer recovered from Riparo Fredian (Tuscany, Italy)...
March 27, 2017: American Journal of Physical Anthropology
https://www.readbyqxmd.com/read/28342040/ancient-parasites-from-endemic-deer-from-cueva-parque-diana-archeological-site-patagonia-argentina
#13
María Ornela Beltrame, Eleonor Tietze, Alberto Enrique Pérez, Agustín Bellusci, Norma Haydée Sardella
The narrow Andean-Patagonian temperate rainforest strip in the west of southern South America is inhabited by two endemic species of cervids, the southern pudu (Pudu puda) and the huemul (Hippocamelus bisulcus), both cataloged as near threatened and threatened species, respectively. One of the possible causes of their declined number is the susceptibility to livestock diseases. Significant zooarchaeological records of both deer have been found throughout the Holocene from Patagonia. The present contribution reports the first paleoparasitological results obtained from coprolites of endemic deer from the archeological site "Cueva Parque Diana," Neuquén Province, Argentina, and discusses the possible diseases found in ancient times...
March 24, 2017: Parasitology Research
https://www.readbyqxmd.com/read/28332189/technical-intelligence-and-culture-nut-cracking-in-humans-and-chimpanzees
#14
Christophe Boesch, Daša Bombjaková, Adam Boyette, Amelia Meier
OBJECTIVES: According to the technical intelligence hypothesis, humans are superior to all other animal species in understanding and using tools. However, the vast majority of comparative studies between humans and chimpanzees, both proficient tool users, have not controlled for the effects of age, prior knowledge, past experience, rearing conditions, or differences in experimental procedures. We tested whether humans are superior to chimpanzees in selecting better tools, using them more dexteriously, achieving higher performance and gaining access to more resource as predicted under the technical intelligence hypothesis...
March 23, 2017: American Journal of Physical Anthropology
https://www.readbyqxmd.com/read/28317553/dietary-reconstruction-of-the-el-sidr%C3%A3-n-neandertal-familial-group%C3%A2-spain-in-the-context-of-other-neandertal-and-modern-hunter-gatherer-groups-a-molar-microwear-texture-analysis
#15
Almudena Estalrrich, Sireen El Zaatari, Antonio Rosas
Here, we present the analysis of occlusal molar microwear textures of eight individuals from the El Sidrón Neandertal group (Spain). The aims of the study were: 1) to document potential age-, sex-, and maternal lineage-related differences in diet within a Neandertal familial group, and 2) to place the diet of El Sidrón individuals in the context of those of other Neandertal groups. This study also offers an interpretation of the diet of the El Sidrón Neandertals by comparing their microwear signatures to those of recent hunter-gatherer populations with diverse but known diets...
March 2017: Journal of Human Evolution
https://www.readbyqxmd.com/read/28302420/a-cryptic-mitochondrial-dna-link-between-north-european-and-west-african-dogs
#16
Adeniyi C Adeola, Sheila C Ommeh, Jiao-Jiao Song, S Charles Olaogun, Oscar J Sanke, Ting-Ting Yin, Guo-Dong Wang, Shi-Fang Wu, Zhong-Yin Zhou, Jacqueline K Lichoti, Bernard R Agwanda, Philip M Dawuda, Robert W Murphy, Min-Sheng Peng, Ya-Ping Zhang
Domestic dogs have an ancient origin and a long history in Africa. Nevertheless, the timing and sources of their introduction into Africa remain enigmatic. Herein, we analyse variation in mitochondrial DNA (mtDNA) D-loop sequences from 345 Nigerian and 37 Kenyan village dogs plus 1530 published sequences of dogs from other parts of Africa, Europe and West Asia. All Kenyan dogs can be assigned to one of three haplogroups (matrilines; clades): A, B, and C, while Nigerian dogs can be assigned to one of four haplogroups A, B, C, and D...
March 20, 2017: Journal of Genetics and Genomics, Yi Chuan Xue Bao
https://www.readbyqxmd.com/read/28302068/late-danubian-mitochondrial-genomes-shed-light-into-the-neolithisation-of-central-europe-in-the-5-th-millennium-bc
#17
Maciej Chyleński, Anna Juras, Edvard Ehler, Helena Malmström, Janusz Piontek, Mattias Jakobsson, Arkadiusz Marciniak, Miroslawa Dabert
BACKGROUND: Recent aDNA studies are progressively focusing on various Neolithic and Hunter - Gatherer (HG) populations, providing arguments in favor of major migrations accompanying European Neolithisation. The major focus was so far on the Linear Pottery Culture (LBK), which introduced the Neolithic way of life in Central Europe in the second half of 6th millennium BC. It is widely agreed that people of this culture were genetically different from local HGs and no genetic exchange is seen between the two groups...
March 16, 2017: BMC Evolutionary Biology
https://www.readbyqxmd.com/read/28296885/oral-health-in-transition-the-hadza-foragers-of-tanzania
#18
Alyssa N Crittenden, John Sorrentino, Sheniz A Moonie, Mika Peterson, Audax Mabulla, Peter S Ungar
Conventional wisdom holds that a decline in oral health accompanies the transition from hunting and gathering to agriculture, given increased consumption of carbohydrates. This widely touted example of the mismatch between our biology and modern lifestyle has been intuited largely from the bioarchaeological record of the Neolithic Revolution in the New World. Recent studies of other populations have, however, challenged the universality of this assertion. Here, we present the first comprehensive study of oral health among a living population in transition from the bush to village life, the Hadza hunter-gatherers of Tanzania, to test the hypothesis that the shift from foraging to farming, or agricultural intensification, inevitably leads to increased periodontal disease, caries, and orthodontic disorders...
2017: PloS One
https://www.readbyqxmd.com/read/28282382/population-genetic-analysis-of-the-darc-locus-duffy-reveals-adaptation-from-standing-variation-associated-with-malaria-resistance-in-humans
#19
Kimberly F McManus, Angela M Taravella, Brenna M Henn, Carlos D Bustamante, Martin Sikora, Omar E Cornejo
The human DARC (Duffy antigen receptor for chemokines) gene encodes a membrane-bound chemokine receptor crucial for the infection of red blood cells by Plasmodium vivax, a major causative agent of malaria. Of the three major allelic classes segregating in human populations, the FY*O allele has been shown to protect against P. vivax infection and is at near fixation in sub-Saharan Africa, while FY*B and FY*A are common in Europe and Asia, respectively. Due to the combination of strong geographic differentiation and association with malaria resistance, DARC is considered a canonical example of positive selection in humans...
March 2017: PLoS Genetics
https://www.readbyqxmd.com/read/28273114/large-scale-effects-of-migration-and-conflict-in-pre-agricultural-groups-insights-from-a-dynamic-model
#20
Francesco Gargano, Lucia Tamburino, Fabio Bagarello, Giangiacomo Bravo
The debate on the causes of conflict in human societies has deep roots. In particular, the extent of conflict in hunter-gatherer groups remains unclear. Some authors suggest that large-scale violence only arose with the spreading of agriculture and the building of complex societies. To shed light on this issue, we developed a model based on operatorial techniques simulating population-resource dynamics within a two-dimensional lattice, with humans and natural resources interacting in each cell of the lattice...
2017: PloS One
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