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espanolPresentamos los resultados del analisis de isotopos estables en la fraccion organica (δ13Cco y δ15N) e inorganica (δ13Cap) del registro oseo o dental de 22 individuos subadultos humanos hallados en el sitio arqueologico Los Amarillos (Periodo de Desarrollos Regionales e Inca, provincia de Jujuy). Para el analisis isotopico se consideraron los estudios longitudinales en poblaciones actuales, los cuales han mostrado que durante los primeros meses de vida se detectan valores isotopicos afectados por el amamantamiento. Estos estudios requieren acotar al maximo los rangos etarios de los individuos bajo analisis, lo cual, muchas veces es dificultoso dados los multiples procesos tafonomicos que pueden fragmentar la muestra, asi como tambien por los limites que presentan los metodos analiticos disponibles. No obstante, se ha podido inferir una edad de destete temprana, lo cual habria favorecido la disminucion de los intervalos entre nacimientos, proceso acorde con el aumento demografico propuesto para el periodo cronologico asociado a la ocupacion del sitio arqueologico. EnglishWe show the results of stable isotope analysis of the organic (δ13Cco y δ15N) and inorganic (δ13Cap) fractions of bone or dental remains of 22 sub-adult human individuals found in Los Amarillos archaeological site (Regional Development and Inca periods, province of Jujuy). For reference, longitudinal studies in current populations were considered, which showed that during the first months of life isotope composition values are affected by breastfeeding. These studies require that the age ranges of the individuals under analysis should be set with utmost precision, which is often difficult given the multiple taphonomic processes that may have fragmented the sample, as well as the limits of the analytical methods available. However, our results suggest that the sub-adult individuals analysed were weaned at a very early age, which could have favoured decreasing birth intervals. This evidence provides support to an earlier proposition that a demographic increase took place during the period of occupation of Los Amarillos.

Análisis de isótopos estables en individuos subadultos del sitio arqueológico Los Amarillos (Quebrada de Humahuaca, Jujuy)