Variación de la dieta del mamut de las praderas de Laguna de las Cruces, San Luis Potosí, México

Pérez-Crespo, Víctor Adrián; Arroyo-Cabrales, Joaquín; Benammi, Mouloud; Polaco, Oscar J.; Santos-Moreno, Antonio; Morales-Puente, Pedro; Cienfuegos-Alvarado, Edith; Otero, Francisco J.
September 2013
Boletín de la Sociedad Geológica Mexicana;2013, Vol. 65 Issue 3, p573
Academic Journal
Using biogeochemical techniques based on 13C/12C and 18O/16O relationships in dental enamel, it was inferred if the diets of four Columbian mammoths (Mammuthus columbi) from Laguna de las Cruces (Salinas, San Luis Potosí, México) changed or were similar in time as a response to temperature variations. The results show that the diet of individual DP-1975 kept unchanged, whereas for mammoths DP-1976 and DP-1978 there was a small tendency for eating more C3 plants than C4 plants, possibly due to decreased temperatures, as shown by δ18O values. However, the isotopic carbon values of mammoth DP-1979 show that the specimen was first a mixed feeder C3/C4 and later ate mostly C4 plants, probably due to an increase in the temperature. Furthermore comparisons made between δ13C and δ18O values at the population level show that the two young mammoths, with 18 and 20 years old, are different from the two adults, which seem to be 43 and 47 years old respectively. Such differences may be due to different feed behaviors among young and adult, although it could also indicate that the individuals came from different areas.


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