| Summary: | Lase Induced Brakdown Spectroscopy (LIBS) and Laser Ablation Inductively Coupled Plasma Mass Spectrometry (LA-ICP-MS) were utilized for microspatian nallyses of a fossil bear (Ursus arctos) tooth dentine. The distribution of selected trace elemnts (Sr, Ba, Fe) was measured on a 26 mm x 15 mm large and 3 mm thick transversal cross section of canine tooth, The Na and Mg content together with the distribution of matrix elemnts (Ca, P) was aslo monitored within this area. It is shown that LIBS, similarly to LA-ICP-MS can be successfully utilized for fast, spatially-resolved analysis of fossi teeth samples. Rate of Sr and Ca, Sr and Ba tracers were recognized and it is possible to say, thet these elemnts are changing its concentration in according to the seasonal increments of dentine. The concetration is lower in winter, when the bear is in his hibernation, contrary to summe, which is affuent for its substances. Secondly,concentration of Sr. shows us a seasonal migration between the place of hibernating and territory where bear searched for feed. From measurement of concentrations it is possible to claim, that the bear was hunted in his season of searching for feed, when he was ensuring his fat reserfe for winter. From archaeological pint of iew, on the base of these measurements it was possible to reconstract the ehtology of the fossil brown bear, i.e the nutrition, health and migration. Miriam Nývltová Fišáková . [et al.]. Obsahuje seznam literatury
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