Pleistocene Mammals
Mostrando 1-12 de 18 artigos, teses e dissertações.
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1. Splendid oddness: revisiting the curious trophic relationships of South American Pleistocene mammals and their abundance
A fauna de mamíferos do Pleistoceno da América do Sul inclui animais de grande tamanho que têm despertado o interesse dos cientistas durante mais de dois séculos. Aqui tencionamos atualizar o conhecimento da sua paleoecologia e disponibilizar nova evidência a respeito de dois enfoques: energética vs. densidade populacional e abundância relativa de tax
An. Acad. Bras. Ciênc.. Publicado em: 2014-03
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2. MamÃferos do Pleistoceno Superior de AfrÃnio, Pernambuco, Nordeste do Brasil
Foram estudados aspectos taxonÃmicos e tafonÃmicos de paleofauna inÃdita de mamÃferos pleistocÃnicos, preservados nas lagoas Caveira, Tanque e Comprida, bacia do riacho Caboclo, tributÃrio do rio SÃo Francisco em AfrÃnio, Pernambuco. O trabalho envolveu levantamentos bibliogrÃfico e cartogrÃfico, trabalhos de campo e laboratoriais. Mais de 1.200 os
Publicado em: 2009
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3. ReconstituiÃÃo paleoambiental baseada no estudo de mamÃferos pleistocÃnicos de Maravilha e poÃo das trincheiras, Alagoas, nordeste do Brasil
This work objectives the systematic, taphonomy, geomorphological, sedimentological, geochemical and geochronological study of pleistocene mammals for the proposal of a paleoenvironmental model in the municipal districts of Maravilha and PoÃo das Trincheiras both, situated in Alagoas state, Brazil. Besides, actions were developed to guarantee the preservatio
Publicado em: 2008
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4. Isolamento e caracterização de toxinas do veneno de Bothrops alcatraz Marques, Martins e Sazima, 2002 e aspectos coevolutivos com a dieta / Isolation and characterization of toxins of Bothrops alcatraz Marques, Martins e Sazima, 2002 venom and coevolutive aspects with diet
Snakes venoms are complex mixtures with varied composition constituted by organic and inorganic molecules. The main organic components are proteins, which can be toxic and show high enzymatic activities, thus playing important role in prey capture and digestion in snakes. Viperidae snakes family show wide range of biological actions, as proteolytic, coagulan
Publicado em: 2007
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5. Os mamÃferos pleistocÃnicos de Fazenda Nova, Brejo da Madre de Deus, Pernambuco: aspectos tafonÃmicos, taxonÃmicos e paleoambientais
O objetivo deste trabalho à o estudo tafonÃmico, taxonÃmico e geocronolÃgico de mamÃferos pleistocÃnicos em depÃsito de tanque, para subsidiar interpretaÃÃes paleoecolÃgicas e paleoambientais. A Ãrea de estudo situa-se na Localidade IncÃ, Fazenda Nova, Brejo da Madre de Deus, Pernambuco. A pesquisa envolveu levantamento bibliogrÃfico, cartogrÃf
Publicado em: 2007
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6. Toxocara canis (Werner, 1782) eggs in the Pleistocene site of Menez-Dregan, France (300,000-500,000 years before present)
On the archaeological site of Menez-Dregan in Brittany, France, dated 300,000-500,000 years-old, paleoparasitological analysis of cave deposits led to the detection of well-preserved helminth eggs, which morphology and morphometry pointed to the diagnosis of Toxocara canis eggs, a parasite of carnivore mammals. Paleolithic remains suggested a parasitism of t
Memórias do Instituto Oswaldo Cruz. Publicado em: 2003-01
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7. Plate tectonics, seaways and climate in the historical biogeography of mammals
The marsupial and placental mammals originated at a time when the pattern of geographical barriers (oceans, shallow seas and mountains) was very different from that of today, and climates were warmer. The sequence of changes in these barriers, and their effects on the dispersal of the mammal families and on the faunas of mammals in the different continents,
Memórias do Instituto Oswaldo Cruz. Publicado em: 2000-08
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8. Exceptional record of mid-Pleistocene vertebrates helps differentiate climatic from anthropogenic ecosystem perturbations
Mid-Pleistocene vertebrates in North America are scarce but important for recognizing the ecological effects of climatic change in the absence of humans. We report on a uniquely rich mid-Pleistocene vertebrate sequence from Porcupine Cave, Colorado, which records at least 127 species and the earliest appearances of 30 mammals and birds. By analyzing >20,000
National Academy of Sciences.
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9. The amino acid composition of bone and tooth proteins in late Pleistocene mammals.
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10. Genetic footprints of demographic expansion in North America, but not Amazonia, during the Late Quaternary
The biotic consequences of climate change have attracted considerable attention. In particular, the “refugial debate” centers on the possible retraction of habitats to limited areas that may have served as refuges for many associated species, especially during glaciations of the Quaternary. One prediction of such scenarios is that populations must ha
National Academy of Sciences.
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11. A new extinct primate among the Pleistocene megafauna of Bahia, Brazil.
A nearly complete skeleton of a robust-bodied New World monkey that resembles living spider monkeys was recovered from undisturbed Pleistocene deposits in the Brazilian state of Bahia. The skeleton displays the highly specialized postcranial pattern typical of spider and woolly spider monkeys and shares cranial similarities to the spider monkey exclusively.
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12. Early hominid biogeography
We examined the biogeographic patterns implied by early hominid phylogenies and compared them to the known dispersal patterns of Plio-Pleistocene African mammals. All recent published phylogenies require between four and seven hominid dispersal events between southern Africa, eastern Africa, and the Malawi Rift, a greater number of dispersals than has previo
The National Academy of Sciences.