627 resultados para MAMMALIA CETACEA
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Parts of a projected work entitled "The fauna of Scotland; with special reference to Clydesdale and the western district" were issued with the Proceedings as follows: with v. 3, p. 3, 1878, Hymenoptera, pt. I [By Peter Cameron. 1878] 52 p. ; with v. 4, pt. 1, 1880, Mammalia. By E.R. Alston. 1880. 1 p. l., 39 p.; with v. 4, pt. 1, 1880, Fresh and brackish-water Ostracoda. By David Robertson. 1880. 1 p. l., 35 p. ; with new ser., v. 1, pt. 2, 1886, Hymenoptera, pt. II. By Peter Cameron. 1886. 2 p. l., [53]-95 p.
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At head of title: The Willoughby Society.
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"A geological excursion to Tilgate forest A.D. 2000, by Thomas Hood": p. 982-985.
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Vols. 3 and 4 are in two parts each.
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Each volume in two parts, each with general engravings and special t.-p.; in v. 1-11 paged continuously.
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Each v. has also individual t.-p.
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Issued in VI fasciculi, each of which has special t.-p.
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Buffon: Histoire naturelle ... 1750-1804.
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Coloured frontis. in each vol.
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--VI. Insects, pt. II. Hymenoptera continued (Tubilifera and Aculeata), Coleoptera, Strepsiptera, Lepidotera, Diptera, Aphaniptera, Thysanoptera, Hemiptera, Anoplura. By David Sharp. 1901.--VII. Hemichordata, by S.F. Harmer. Ascidians and Amphioxus, by W.A. Herdman. Fishes (exclusive of th systematic account of Teleostei) by T.W. Bridge. Fishes (systematic account of Teleostei) by G.A. Bonlenger. 1904.--VIII. Amphibia and reptiles, by Hans Gadow. 1901.--IX. Birds, by A.H. Evans. 1900--X. Mammalia, by F.E. Beddard. 1902.
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Contains bibliographies.
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Senior thesis written for Oceanography 445
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Thesis (Ph.D.)--University of Washington, 2016-06
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As a general test of the energetic equivalence rule, we examined macroecological relationships among abundance, density and host body mass in a comparative analysis of the assemblages of trophically transmitted endoparasitic helminths of 131 species of vertebrate hosts. Both the numbers and total volume of parasites per gram of host decreased allometrically with host body mass, with slopes roughly consistent with those expected from the allometric relationship between host basal metabolic rate and body mass. From an evolutionary perspective, large body size may therefore allow hosts to escape from the deleterious effects of parasitism.
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For most of the past century, the prospect of replacing lost or damaged cells in the central nervous system (CNS) was hampered by the opinion that the adult mammalian CNS was incapable of generating new nerve cells. This belief, Like most dogmas, was essentially founded on a lack of experimental evidence to the contrary. The overturning of this 'no new neuron' hypothesis began midway through the twentieth century with a series of reports documenting neurogenesis in the postnatal and adult brain(1), continued with the isolation and in vitro culture of neurogenic cells from the adult mammalian brain(2,3), and culminated in the discovery of a population of muttipotent, selfrenewing cells in the adult CNS (that is, bona fide neural stem cells)(3-5). Although a variety of techniques were initially used, the neurosphere assay (NSA)(3,6) rapidly emerged as the assay of choice and has since become a valuable toot for isolating, and understanding the biology of, embryonic and adult CNS stem cells. Like all technologies, it is not without its limitations. In this article we will hightight several shortcomings of the assay related to its application and interpretation that we believe have led to a significant body of research whose conclusions may well be misleading.