Paleopatología del sacro en cazadores recolectores de Patagonia Austral

El sacro es importante para la estabilidad corporal, la fijación de las extremidades inferiores y la protección de los órganos pélvicos. Este hueso puede verse afectado por patologías de índole congénito, degenerativo o multifactorial. El objetivo del presente estudio es analizar lesiones sacrales en una muestra bien preservada de cazadores-recolectores de Patagonia Austral y la posible influencia de los factores temporo-espaciales y el estilo de vida, con especial atención al momento de contacto nativo-europeo. Se analizaron 56 sacros adultos de ambos sexos fechados en un amplio rango cronológico (5.200 años AP - s. XX), siguiendo la metodología propuesta por Campo (2003, 2015). Las patologías analizadas mostraron que los individuos originarios que habitaron espacios misionales presentaron mayores niveles de prevalencia que sujetos pre-contacto y post-contacto fuera de la misión, excepto en el caso de los nódulos de Schmörl. Los efectos de la edad y el sexo mostraron un patrón similar al observado en otras poblaciones. Se apreció una alta prevalencia de espondilolisis, similar a la observada en Inuits. Debido a la carencia de una metodología estandarizada en la clasificación de la Espina Bífida Oculta -SBO-, este trabajo propone el uso de la propuesta por Kumar y Tubbs (2011).Sacrum is important for body stability, lowerlimbs attachment and pelvic organs protection. This bone could be affected bycongenital, degenerative or multifactorial pathologies. The aim of thepresent study is to analyse sacral lesions in a sample well preserved remainsfrom Southern Patagonian hunter-gatherers and the possible influences oftemporal-spatial and lifestyle variables, with special attention to theNative-European contact effect. Pathological signs from 56 adult sacral bonesfrom both sexes and comprising a wide chronology range (5200 years BP- 20thcentury), were analyzed following the methodology proposed by Campo (2003,2015). Pathologies analysed showed that native individualswho lived at missionary places presented higher lesion prevalence thanpre-contact and post-contact out of mission samples, except for Schmörl nodes. Ageand sex effect showed similar patterns with respect to other populations. Highprevalence of spondylolysis was observed, similarly to Inuit samples.Fil: D'angelo del Campo, Manuel Domingo. Universidad Autónoma de Madrid; EspañaFil: Medialdea, Laura. Universidad Autónoma de Madrid; EspañaFil: García Laborde, Pamela. Universidad Nacional del Centro de la Provincia de Buenos Aires; ArgentinaFil: Salemme, Monica Cira. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; ArgentinaFil: Santiago, Fernando Carlos. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; ArgentinaFil: Campo Martín, Manuel. Universidad Autónoma de Madrid; EspañaFil: González Martín, Armando. Universidad Autónoma de Madrid; EspañaFil: Guichón, Ricardo Anibal. Universidad Nacional del Centro de la Provincia de Buenos Aires; Argentin

Hunter-gatherers, biogeographic barriers and the development of human settlement in Tierra del Fuego

Tierra del Fuego represents the southernmost limit of human settlement in the Americas. While people may have started to arrive there around 10 500 BP, when it was still connected to the mainland, the main wave of occupation occurred 5000 years later, by which time it had become an island. The co-existence in the area of maritime hunter-gatherers(in canoes) with previous terrestrial occupants pre-echoes the culturally distinctive groups encountered by the first European visitors in the sixteenth century. The study also provides a striking example of interaction across challenging natural barriers

Ancient genomes in South Patagonia reveal population movements associated with technological shifts and geography

Archaeological research documents major technological shifts among people who have lived in the southern tip of South America (South Patagonia) during the last thirteen millennia, including the development of marine-based economies and changes in tools and raw materials. It has been proposed that movements of people spreading culture and technology propelled some of these shifts, but these hypotheses have not been tested with ancient DNA. Here we report genome-wide data from 20 ancient individuals, and co-analyze it with previously reported data. We reveal that immigration does not explain the appearance of marine adaptations in South Patagonia. We describe partial genetic continuity since ~6600 BP and two later gene flows correlated with technological changes: one between 4700–2000 BP that affected primarily marine-based groups, and a later one impacting all <2000 BP groups. From ~2200–1200 BP, mixture among neighbors resulted in a cline correlated to geographic ordering along the coast.Fil: Nakatsuka, Nathan. Harvard Medical School; Estados UnidosFil: Luisi, Pierre. Universidad Nacional de Córdoba. Facultad de Filosofía y Humanidades; ArgentinaFil: Motti, Josefina María Brenda. Universidad Nacional del Centro de la Provincia de Buenos Aires; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Salemme, Monica Cira. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina. Universidad Nacional de Tierra del Fuego; ArgentinaFil: Santiago, Fernando Carlos. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; ArgentinaFil: D'angelo del Campo, Manuel Domingo. Universidad Nacional del Centro de la Provincia de Buenos Aires. Facultad de Ciencias Sociales. Grupo de Estudios Interdisciplinarios sobre Poblaciones Humanas de Patagonia Austral; Argentina. Universidad Autónoma de Madrid; EspañaFil: Vecchi, Rodrigo Javier. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional del Sur; ArgentinaFil: Espinosa Parrilla, Yolanda. Consejo Superior de Investigaciones Científicas; EspañaFil: Prieto, Alfredo. Universidad de Magallanes; ChileFil: Adamski, Nicole. Harvard Medical School; Estados UnidosFil: Lawson, Ann Marie. Harvard Medical School; Estados UnidosFil: Harper, Thomas K.. University of Pennsylvania; Estados UnidosFil: Culleton, Brendan J.. University of Pennsylvania; Estados UnidosFil: Kennett, Douglas J.. University of California; Estados UnidosFil: Lalueza Fox, Carles. Consejo Superior de Investigaciones Científicas; EspañaFil: Mallick, Swapan. Harvard Medical School; Estados UnidosFil: Rohland, Nadin. Harvard Medical School; Estados UnidosFil: Guichón, Ricardo A.. Universidad Nacional del Centro de la Provincia de Buenos Aires; ArgentinaFil: Cabana, Graciela S.. University of Tennessee; Estados UnidosFil: Nores, Rodrigo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Antropología de Córdoba. Universidad Nacional de Córdoba. Facultad de Filosofía y Humanidades. Instituto de Antropología de Córdoba; ArgentinaFil: Reich, David. Harvard Medical School. Department Of Medicine; Estados Unido

Restos humanos en el norte de Tierra del Fuego: Aspectos contextuales, dietarios y paleopatológicos Human remains in northern Tierra del Fuego : context, diet and paleopathology

Una serie de excavaciones realizadas entre los años 2000 y 2007 en la costa atlántica de Tierra del Fuego, en su mayoría de rescate, permitieron recuperar 11 esqueletos humanos en ocho sitios en contextos mortuorios de apariencia diversa. Se presenta y discute aquí la información referida a la distribución de este registro, considerando el tipo de entierro, los procesos posdepositacionales que probablemente actuaron sobre el registro bioarqueológico, las características paleopatológicas y los análisis cronológicos e isotópicos para abordar tipos de dieta. En una escala regional, se incorpora nueva información bioarqueológica para un sector de la costa de Tierra del Fuego para la cual se contaba con escasa información, y en escala suprarregional se aporta a las interpretaciones de distintos aspectos bioculturales de las poblaciones humanas que habitaron el sur de Patagonia durante el Holoceno.Archaeological excavations, most of them rescues, carried out between 2000 and 2007 at eight pre-Hispanic sites along the Atlantic coast of Tierra del Fuego produced 11 human skeletons from burials of different types. This paper discusses burial type, distribution and post-depositional processes, as well as the paleopathologic, chronological and isotopic skeletal analyses that reveal dietary patterns. On a regional scale, these new bioanthropological data add to knowledge of an area of Tierra del Fuego that is in desperate need of further research. On a supra-regional scale, the results support previous interpretations of the biocultural diversity found in the human groups that inhabited southern Patagonia during the Holocene

On probable fusion mechanism in a Mather-Type plasma focus

An experimental study on plasma focus fusion mechanisms is presented in this paper. Simple diagnostic techniques such as current derivative, voltage, and time-integrated neutron detectors are used. This paper allow us to obtain information and fusion mechanisms present in a medium energy plasma focus [ Auto Confined (PACO), 2 kJ, 31 kV, and T = 2,9µs ]. La current sheet (CS) inductance is calculated through the anode voltage and current derivative signals, for some 80 shots performed within the pressure range 0.8-2.1 mbar of deuterium. It is concluded that the CS inductance is consistent with the behavior of a unique plasma sheet moving between two coaxial electrodes. From the information collected, it is concluded that the main fusion mechanism in this device is the beam-target one.Fil: Bruzzone, Horacio Abel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata; Argentina. Universidad Nacional de Mar del Plata; ArgentinaFil: Barbaglia, Mario Oscar. Universidad Nacional del Centro de la Provincia de Buenos Aires. Facultad de Ciencias Exactas. Instituto de Física Arroyo Seco; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Acuña, Hugo Néstor. Universidad Nacional de Mar del Plata; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata; ArgentinaFil: Milanese, Maria Magdalena. Universidad Nacional del Centro de la Provincia de Buenos Aires. Facultad de Ciencias Exactas. Instituto de Física Arroyo Seco; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Moroso, Roberto Luis. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional del Centro de la Provincia de Buenos Aires. Facultad de Ciencias Exactas. Instituto de Física Arroyo Seco; ArgentinaFil: Guichón, Santiago. Universidad Nacional del Centro de la Provincia de Buenos Aires. Facultad de Ciencias Exactas. Instituto de Física Arroyo Seco; Argentin

Temporomandibular joint osteoarthritis in human ancient skeletal remains from Late Holocene in southern Patagonia

Low prevalence of caries, high stages of dental attrition (DA), and moderate frequency of antemortem tooth loss (AMTL) were found in skeletal remains of hunter-gatherers from southern Patagonia. However, osteoarthritis (OA) of temporomandibular joint (TMJ), possible related to oral health, has not been studied so far. The influence of hunter-gatherer living conditions on the development of TMJ-OA was scarcely evaluated, and analyses of degenerative changes of TMJ in nonindustrialized groups are needed. The aim of this study is to analyse the association between degenerative changes of TMJ, oral disease, and palaeodietary patterns in skeletal remains of hunter-gatherers from southern Patagonia. Degenerative changes of TMJ were recorded in 25 adult skulls of both sexes. Eburnation of articular eminence and/or mandibular condyle was considered as pathognomonic of OA. In the absence of eburnation, OA was diagnosed when two or more of the following lesions were identified: (a) new bone formation on joint surface, (b) new bone formation of joint margins, (c) porosity on the joint surface, and (d) modification of joint contour. In the studied skeletons, it was found that OA prevalence is 28%, similar to those observed in other hunter-gatherer populations elsewhere. TMJ-OA is mostly related to AMTL and older age, but no relation was found with caries and DA, sex, region, dietary patterns, and chronology. However, consumption of terrestrial resources in the diet cannot be discarded as a related factor. Further studies are necessary to explore the morphological variability of the mandible and its possible relationship with different diets and dental pathologies in these populations.Fil: Suby, Jorge Alejandro. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tandil. Investigaciones Arqueológicas y Paleontológicas del Cuaternario Pampeano. Universidad Nacional del Centro de la Provincia de Buenos Aires. Investigaciones Arqueológicas y Paleontológicas del Cuaternario Pampeano; ArgentinaFil: Giberto, Diego Agustin. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; Argentin

NEOTROPICAL ALIEN MAMMALS: a data set of occurrence and abundance of alien mammals in the Neotropics

Biological invasion is one of the main threats to native biodiversity. For a species to become invasive, it must be voluntarily or involuntarily introduced by humans into a nonnative habitat. Mammals were among first taxa to be introduced worldwide for game, meat, and labor, yet the number of species introduced in the Neotropics remains unknown. In this data set, we make available occurrence and abundance data on mammal species that (1) transposed a geographical barrier and (2) were voluntarily or involuntarily introduced by humans into the Neotropics. Our data set is composed of 73,738 historical and current georeferenced records on alien mammal species of which around 96% correspond to occurrence data on 77 species belonging to eight orders and 26 families. Data cover 26 continental countries in the Neotropics, ranging from Mexico and its frontier regions (southern Florida and coastal-central Florida in the southeast United States) to Argentina, Paraguay, Chile, and Uruguay, and the 13 countries of Caribbean islands. Our data set also includes neotropical species (e.g., Callithrix sp., Myocastor coypus, Nasua nasua) considered alien in particular areas of Neotropics. The most numerous species in terms of records are from Bos sp. (n = 37,782), Sus scrofa (n = 6,730), and Canis familiaris (n = 10,084); 17 species were represented by only one record (e.g., Syncerus caffer, Cervus timorensis, Cervus unicolor, Canis latrans). Primates have the highest number of species in the data set (n = 20 species), partly because of uncertainties regarding taxonomic identification of the genera Callithrix, which includes the species Callithrix aurita, Callithrix flaviceps, Callithrix geoffroyi, Callithrix jacchus, Callithrix kuhlii, Callithrix penicillata, and their hybrids. This unique data set will be a valuable source of information on invasion risk assessments, biodiversity redistribution and conservation-related research. There are no copyright restrictions. Please cite this data paper when using the data in publications. We also request that researchers and teachers inform us on how they are using the data