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All You Need to Know About Spiders
All You Need to Know About Spiders Spiders are super predators and devour everything they can overpower. To do this, they have developed incredibly good catching techniques and, with spider silk, a tool that makes material technology green with envy. The males are usually smaller than the females and, in order to have sex, they have to come up with a lot to avoid being misunderstood as easy prey: Dancing, drumming, and gifts almost always help. Spiders use their venom in very precise doses, and since humans are not on their menu, they are harmless to us. Many people's (unnecessary) fear of spiders finds cultural roots as early as the Middle Ages. Nevertheless, spider fear is easily treatable...
Hausspinnen weltweit
Spinnen, die als Untermieter in unseren Häusern vorkommen, werden meist ignoriert und gelegentlich (zu Unrecht) gefürchtet. Es dürfte weltweit kaum ein Gebäude geben, in dem nicht einige Spinnenarten vorkommen. Faszinierend daran ist, dass es immer wieder die gleichen Arten sind. Sie verfügen über besondere Anpassungen, denn die Luftfeuchtigkeit ist viel zu gering, es ist zu sauber und das Nahrungsangebot ist knapp. Wer aber den Sprung in unsere vier Wände geschafft hat, wird mit einem globalen Bleiberecht belohnt. Das liegt an der weltweiten Handels- und Migrationsfreudigkeit der Menschen: Sie transportieren einen unendlichen Strom von Waren um die Welt. Und unsere Hausspinnen reisen unerkannt mit. Es ist daher möglich, die weltweit anzutreffenden Hausspinnen in einem einzigen Buch vorzustellen, denn es sind überall weitgehend die gleichen. Die rund 50 wichtigsten Arten und Artengruppen werden mit einem ausführlichen Steckbrief, Fotos und Verbreitungskarten in allgemeinverständlicher Weise vorgestellt.
Jahrbuch
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Black Magic
Black Magic looks at the origins, meaning, and uses of Conjure—the African American tradition of healing and harming that evolved from African, European, and American elements—from the slavery period to well into the twentieth century. Illuminating a world that is dimly understood by both scholars and the general public, Yvonne P. Chireau describes Conjure and other related traditions, such as Hoodoo and Rootworking, in a beautifully written, richly detailed history that presents the voices and experiences of African Americans and shows how magic has informed their culture. Focusing on the relationship between Conjure and Christianity, Chireau shows how these seemingly contradictory trad...
British Spiders
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Multivariate Morphometrics
The historical background to morphometric studies; The mathematical framework of morphometric analyses; The biological background to multivariate analysis; Some simple forerunners of multivariate morphometrics; Some practical considerations; The use of angles between vectors; Formal background of discriminant functions analysis; Canonical variates; Canonical correlations; Variation in the apparently homogeneous sample; Du praw's non-linnean taxonomy; Principal components and principal coordinates analyses; Factor analysis; The measurement of environmental variation; Multivariate studies in ecology; Phytosociological studies; The quantitative comparison of faunal elements; Genetical aspects of morphometrics; Coordinated applications of multivariate analysis; Some applications of discriminatory topology; The relationships between morphometric analyses and numerical taxonomy...
Morphometrics with R
This book aims to explain how to use R to perform morphometrics. Morpho- tric analysis is the study of shape and size variations and covariations and their covariations with other variables. Morphometrics is thus deeply rooted within stat- tical sciences. While most applications concern biology, morphometrics is becoming common tools used in archeological, palaeontological, geographical, or medicine disciplines. Since the recent formalizations of some of the ideas of predecessors, such as D’arcy Thompson, and thanks to the development of computer techno- gies and new ways for appraising shape changes and variation, morphometrics have undergone, and are still undergoing, a revolution. Most ...
Dust Bowl
In the mid 1930s, North America's Great Plains faced one of the worst man-made environmental disasters in world history. Donald Worster's classic chronicle of the devastating years between 1929 and 1939 tells the story of the Dust Bowl in ecological as well as human terms.Now, twenty-five years after his book helped to define the new field of environmental history, Worster shares his more recent thoughts on the subject of the land and how humans interact with it. In a new afterword, he links the Dust Bowl to current political, economic and ecological issues--including the American livestock industry's exploitation of the Great Plains, and the on-going problem of desertification, which has now become a global phenomenon. He reflects on the state of the plains today and the threat of a new dustbowl. He outlines some solutions that have been proposed, such as "the Buffalo Commons," where deer, antelope, bison and elk would once more roam freely, and suggests that we may yet witness a Great Plains where native flora and fauna flourish while applied ecologists show farmers how to raise food on land modeled after the natural prairies that once existed.
Morphometrics, the Multivariate Analysis of Biological Data
Matrix algebra and multivariate methods; Multiple regression and correlation; Principal component analysis; Multigroup principal component analysis; Factor analysis; Canonical correlation analysis; Ordination and cluster analysis; Multivariate analysis of variance and covariance; Discriminant analysis; Computer programs for morphometrics.
