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In this work we uncovered a well-supported pattern of the demographic change in the populations from South-Central Andes and Patagonia, obtained on the basis of different data and quantitative approaches, which suggests that the incorporation of domestic resources was paramount for the demographic expansion of these populations during the Holocene.

the first settlers of Patagonia and several extinct species: Hemiauchenia cf. paradoxa, Lama gracilis, Panthera onca mesembrina, Hippidion saldiasi, Megatherium americanum cf. and Arctotheirum sp. Present fauna such as Lama guanicoe, Rhea sp., Lycalopex griseus and Lycalopex sp. is also contemporary. All the information points to the fact that southern Patagonia had paleoenvironmental diversity, plurality of sites and different use patterns of wildlife during the Pleistocene-Holocene transition. The use and consumption of the three species of camelids and the survival of Hippidion saldiasi in specific environments of the plateau is also highlighted. These issues are discussed taking into account available information relating to the early human occupation of the Southern Cone, as part of a growing methodological improvement that seeks to integrate different research avenues.

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Este trabajo busca generar un aporte al conocimiento de la dinámica poblacional de cazadores, en Patagonia meridional, durante el Holoceno medio y tardío en el marco de condiciones climáticas altamente fluctuantes. Para este fin se analizaron distintas líneas de evidencias arqueológicas provenientes de diferentes ambientes del centro-oeste de la provincia de Santa Cruz, Argentina. Se identificó una interesante variabilidad del registro arqueológico, en estrecha relación con las modificaciones ambientales registradas en el Holoceno.Palabras claves: Patagonia, cazadores-recolectores, Holoceno.this article seeks to generate a contribution to the knowledge of the peopling dynamics of hunters in southern Patagonia during the middle and late holocene within fluctuating climatic conditions. in order to do this, different archaeological evidences were analyzed from diverse environments in Santa cruz province (Argentina). An interesting variability in the archaeological record was identified, in close relation with the environmental modifications registered in the holocene.

Paleoparasitological examination provides information of parasite-host associations in the past, shedding light on the geographical origin of some parasites, on the possible dispersal routes and on some of the processes that modelled the parasitic communities. The aim of the present study was to examine parasite remains present in camelid coprolites collected from the archaeological site Alero Destacamento Guardaparque, Patagonia and to discuss the paleoparasitological findings in a biogeographical and paleoecological context. Coprolites were collected from different stratified layers dating from middle to late Holocene, a period covering approximately 7000 years. Paleoparasitological examination revealed the presence of eggs attributed to Lamanema chavezi or Nematodirus lamae, Nematodirus spathiger, Dictyocaulus sp., eggs of two unidentified capillariids, Strongylus-type eggs and oocysts of Eimeria macusaniensis. Enteric parasites of camelids had not changed significantly during the Holocene up to the entry of introduced livestock, although environmental conditions fluctuated greatly throughout this period, indicating the stability of these associations over time. This is the first finding of N. spathiger and Dictyocaulus sp. in paleoparasitological record and their presence are associated with the interaction of camelids with introduced livestock, which likely allowed parasite host switching. In the present study, the zoonotic importance of parasites of camelids is also discussed.