586 resultados para Rattus norvegicus albinus
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Human settlement of Polynesia was a major event in world prehistory. Despite the vastness of the distances covered, research suggests that prehistoric Polynesian populations maintained spheres of continuing interaction for at least some period of time in some regions. A low level of genetic variation in ancestral Polynesian populations, genetic admixture (both prehistoric and post-European contact), and severe population crashes resulting from introduction of European diseases make it difficult to trace prehistoric human mobility in the region by using only human genetic and morphological markers. We focus instead on an animal that accompanied the ancestral Polynesians on their voyages. DNA phylogenies derived from mitochondrial control-region sequences of Pacific rats (Rattus exulans) from east Polynesia are presented. A range of specific hypotheses regarding the degree of interaction within Polynesia are tested. These include the issues of multiple contacts between central east Polynesia and the geographically distinct archipelagos of New Zealand and Hawaii. Results are inconsistent with models of Pacific settlement involving substantial isolation after colonization and confirm the value of genetic studies on commensal species for elucidating the history of human settlement.
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Presented are physical and biological data for the region extending from the Barents Sea to the Kara Sea during 158 scientific cruises for the period 1913-1999. Maps with the temporal distribution of physical and biological variables of the Barents and Kara Seas are presented, with proposed quality control criteria for phytoplankton and zooplankton data. Changes in the plankton community structure between the 1930s, 1950s, and 1990s are discussed. Multiple tables of Arctic Seas phytoplankton and zooplankton species are presented, containing ecological and geographic characteristics for each species, and images of live cells for the dominant phytoplankton species.
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Vol. I translated by Henry Cary, vol. II, by Henry Davis, vols. III-VI, by George Burges.
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v. 1. The Apology of Socrates, Crito, Phaedo, Gorgias, Protagoras, Phaedrus, Theaetetus, Euthyphron, and Lysis -- v. 2. The Republic, Timaeus, and Critias -- v. 3. Meno, Euthydemus, The sophist, The statesman, Cratylus, Parmenides, and the Banquet -- v. 4. Philebus, Charmides, Laches, Menexenus, Hippias major, Hippias minor, Ion, First Alcibiades, Second Alcibiades, Theages, The rivals, Hipparchus. Minos, Clitopho, The epistles -- v. 5. The laws -- v. 6. The doubtful works ... with lives by Plato by Diogenes Laertius, Hesychius, and Olympiodorus; introductions to his doctrines, by Alcinous and Albinus; the notes of Thomas Gray, and a general index.
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Mode of access: Internet.
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Mode of access: Internet.
Bernardi Siegfried Albini Explicatio tabularum anatomicarum Bartholomaei Eustachii, anatomici summi.
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Mode of access: Internet.
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Mode of access: Internet.
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Mode of access: Internet.
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Mode of access: Internet.