Bøger af Matthias Voigt

Der ideale Begleiter für den bilingualen Sachfachunterricht. Dieser Wortschatz vermittelt thematisches Vokabular zu allen relevanten Sachthemen aus den Bereichen Politik, Wirtschaft und Gesellschaftslehre: Modern Society, Democracy and other forms of rule, Media, Globalization, Ecology und Economics. Ausführlich behandeltw werden die zugrunde liegenden Theorien und Praktiken des politischen und wirtschaftlichen Prozesses (Political science and theory), unter umfassender Berücksichtigung der politischen Systeme in Deutschland, den USA und Großbritannien und der EU: Governing Germany, Governing the United Kingdom, Governing the United States of America. Das Grundlagenkapitel Basic political terms vermittelt außerdem alles notwendige Vokabular zur schriftlichen und mündlichen Kommunikation im behandelten Themenfeld.

All known and relevant data and features to enable an identification of sharks of the genus Carcharhinus (BLAINVILLE 1816) are summarised and visualised in this book. The introduced species are difficult to separate for somebody who is not experienced in identifying sharks. An identification key is given to determine and to differentiate the species. For each species an extended list of characters is given including coloured figures to show the lateral and ventral view, a detailed view of nostril and teeth, and in some cases of juveniles and special characters. Further, data on body size and appearance, colouration, tooth formula and shape, numbers of vertebrae, on other internal and external characters, the geographical distribution, preferred habitat and food spectrum are presented. In addition, biological and reproductional data are included, e. g. number of young per litter, size at birth, size at sexual maturity, as well as behaviour and migrational patterns.Most of the previous works about Carcharhinus listed and discussed a maximum of 30 species. In contrast, this field guide describes 33 species, six species with special notes of the authors. Further, a possible subdivision of the spinner shark, C. brevipinna, in an Atlantic and Pacific subspecies is briefly discussed. An almost unknown species, C. acarenatus, formerly considered a synonym of C. brachyurus, is introduced. A very rare species, C. leiodon, which was hitherto recorded only once by GARRICK (1985), is included and controversially discussed. Another species in dispute, Carcharhinus sp. A, mentioned by COMPAGNO et al. (2005) as new member of the genus, is comprised and discussed.