Pleistocene Walrus on the Pechora River: Mineralogical and Geochemical Data and Paleoecological Reconstructions.

Q3 Agricultural and Biological Sciences
V I Silaev, I V Smoleva, V N Filippov, S N Shanina, A F Khazov, B A Makeev, D V Kiseleva, A K Fokina, J van der Plicht
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引用次数: 0

Abstract

Fragments of the left tusk were studied in a Pleistocene walrus whose fossil remains were found on the bank of the Pechora River in 2009. The analyses covered granulometric, chemical, and normative-mineral composition of grounds surrounding the bones; thermal properties and chemical and trace element compositions of the tusk; X-ray diffraction parameters and chemical composition of bone bioapatite; macrostructure and elemental and amino acid compositions of bone organic matter; carbon and oxygen isotopic compositions of bioapatite; and carbon and nitrogen isotope compositions of bone collagen. Bioapatite showed moderately isotopically light carbon, which is characteristic of extracave fossil bones of Pleistocene animals, and isotopically heavy oxygen, which is typical of seawater bicarbonate. The isotopic data obtained for the organic matter of the Pechora walrus correlated with similar characteristics of marine animals, but suggest a fish diet rather than a mollusk diet, which is typical of modern walruses. The finding indicates that the habitat and diet of the Pechora walrus were unusual for marine predators.

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来源期刊
Doklady Biological Sciences
Doklady Biological Sciences Agricultural and Biological Sciences-Agricultural and Biological Sciences (all)
CiteScore
1.10
自引率
0.00%
发文量
66
期刊介绍: Doklady Biological Sciences  is a journal that publishes new research in biological sciences of great significance. Initially the journal was a forum of the Russian Academy of Science and published only best contributions from Russia in the form of short articles. Now the journal welcomes submissions from any country in the English or Russian language. Every manuscript must be recommended by Russian or foreign members of the Russian Academy of Sciences.
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