Author: Wolf-Ekkehard Lönnig
Publisher: MV-Verlag
ISBN: 3869914718
Category : Science
Languages : en
Pages : 146
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Book Description
"Darwin (1871) and many African folk legends before him [...] proposed a simple but powerful explanation for the large and elongated shape. Long necks allowed giraffe to outreach presumed competitors, particularly during dry-season bottlenecks when leaves become scarce; (Simmons and Scheepers). However, this old African folk legend which is still commonly taught in high schools, fails to explain, among other things, the size differences between males and females. Giraffe cows are up to 1.5 meters shorter than the giraffe bulls, not to mention the offspring. The wide migration range of the giraffe and the low heights of the most common plants in their diet likewise argue against the dominant selection hypothesis. Also: 1) The fossil "links," which according to the theory should appear successively and replace each other, usually exist simultaneously for long periods of time. 2) Evolutionary derivations based on similarities rely on circular reasoning. 3) The giraffe has eigh t cervical vertebrae. Although the 8th vertebra displays almost all the characteristics of a neck vertebra, as an exception to the rule the first rib pair is attached there. 4) The origin of the long-necked giraffe by a macromutation is, due to the many synorganized structures, extremely improbable. 5) Sexual selection also lacks a mutational basis and, what is more, is frequently in conflict with natural selection ("head clubbing" is probably "a consequence of a long neck and not a cause"; see also Mitchell et al. 2009). 6) In contrast to the thus-far proposed naturalistic hypotheses, the intelligent design theory is basically testable. 7) The long-necked giraffes possibly all belong to the same basic type inasmuch as 8) a gradual evolution from the short-necked to the long-necked giraffe is ruled out by the duplication of a neck vertebra and the loss of a thoracic vertebra. 9) Chance mutations are principally not sufficient to explain the origin of the long-necked giraffe. 10) The intelligent design theory offers an adequate and satisfying solution to the problems and points to numerous "old" and new research projects. 11) Mitchell and Skinner present a good analysis of the selectionist problem; however, their phylogenetic hypotheses presuppose the correctness of the synthetic evolutionary theory, and their claims of "intermediate forms" are unproven (similarly summary Part 2). Part 1 shows why Dawkins and Kutschera are wrong. The scientific facts speak for design."
Author: Anne Innis Dagg
Publisher: Cambridge University Press
ISBN: 1107034868
Category : Nature
Languages : en
Pages : 261
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Book Description
An up-to-date portrait of the giraffe, summarising current knowledge on their biology and behaviour along with current conservation efforts.
Author: Dale Peterson
Publisher: Univ of California Press
ISBN: 0520266854
Category : Nature
Languages : en
Pages : 230
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Book Description
Presents a cultural, historical, and pictorial history of giraffes, describing their biology and behavior and demonstrating their grace and elegance through over one hundred photographs.
Author: Ian Ridpath
Publisher: BoD – Books on Demand
ISBN: 0718894782
Category : Social Science
Languages : en
Pages : 226
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Book Description
Every night, a pageant of Greek mythology circles overhead. Perseus flies to the rescue of Andromeda, Orion faces the charge of the snorting Bull, and the ship of the Argonauts sails in search of the Golden Fleece. Constellations are the invention of human imagination, not of nature. They are an expression of the human desire to impress its own order upon the apparent chaos of the night sky. Modern science tells us that these twinkling points of light are glowing balls of gas, but the ancient Greeks, to whom we owe many of our constellations, knew nothing of this. Ian Ridpath, award-winning astronomy writer and popularizer, has been intrigued by the myths of the stars for many years. Star Tales is the first modern guide to combine all the fascinating myths in one book, illustrated with the beautiful and evocative engravings from two of the leading star atlases: Johann Bode’s Uranographia of 1801 and John Flamsteed’s Atlas Coelestis of 1729. This classic book, now in a revised and expanded edition, presents additional information on the constellations with new and enchanting illustrations. For anyone interested in the stars and classical mythology, for anyone who is an armchair astronomer, this is the perfect gift.
Author: Bryan Shorrocks
Publisher: John Wiley & Sons
ISBN: 1118587472
Category : Science
Languages : en
Pages : 248
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Book Description
Provides a comprehensive overview of one of nature's most engaging mammals Covers fossil history, taxonomy, genetics, physiology, biomechanics, behavior, ecology, and conservation Includes genetic analysis of five of the six subspecies of modern giraffes Includes giraffe network studies from Laikipia Kenya, Etosha National Park, Namibia andSamburu National Reserve, Kenya
Author: Mike Cassidy
Publisher: Cambridge University Press
ISBN: 1009028189
Category : Science
Languages : en
Pages : 368
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Book Description
Biological evolution, the theory of natural selection and of common descent, is a triumph both of human reasoning and scientific undertaking. The biological discipline of evolution contains both a chronicle of human endeavour and the story of life on Earth. This book is concerned with living forms and how they developed from 'simple and unpromising beginnings'. It considers evolution as both process and product. The author, an experienced teacher and educator, employs a historical narrative, used to convey the idea of 'change with modification' and to emphasise the relevance of evolution to contemporary bioscience. Biological evolution has now become part of the scientific orthodoxy and this accessible text will assist undergraduate students in the biological sciences within any ongoing debate.
Author: Alan F. Dixson
Publisher: Cambridge University Press
ISBN: 1108699499
Category : Medical
Languages : en
Pages : 405
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Book Description
There are more than 6000 species belonging to twenty-seven orders in the Class Mammalia. Comparative studies of this diverse and magnificent array of extant species provide valuable opportunities to formulate and test hypotheses concerning the evolution of reproduction. This is the first book to explore, in depth and breadth, the complex interrelationships that exist between patterns of mating behaviour and the evolution of mammalian reproductive anatomy and physiology. It focuses upon the role that copulatory and post-copulatory sexual selection have played during the evolution of the monotremes, marsupials and placental mammals, and examines the effects of sperm competition and cryptic female choice upon coevolution of the genitalia in the two sexes. In addition, due weight is also given to discussions of the modes of life of mammals, and to the roles played by natural selection and phylogeny in determining their reproductive traits.
Author: Edgar Williams
Publisher: Reaktion Books
ISBN: 1861898894
Category : Nature
Languages : en
Pages : 177
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Book Description
Their extraordinary long necks, distinctive camouflage, graceful movements, and friendly nature have made giraffes one of the most fascinating and beloved animals on the planet. But while giraffes once roamed the Great Plains of Africa in huge herds, their numbers have greatly diminished, and they are now entirely dependent on humanity for their survival. In Giraffe, Edgar Williams explores not only the biology of the tallest animals on earth, but also their impact on human history—including in ancient Egypt, where giraffes were kept as exotic pets; the Middle Ages, when giraffes were considered mythical beasts as improbable and mysterious as the dragon; and the Victorian era, in which giraffe hunting was considered an exhilarating sport. Giraffe is the first book to provide a comprehensive, twenty-first-century view of the giraffe in art, literature, film, and popular culture, as well as its natural history from prehistory to modern times. With new insights into the giraffe’s genetics and evolution, this book will appeal to those interested in the giraffe’s unique biology and to anyone who admires the majestic giraffe.
Author: Partha Dasgupta
Publisher: Cambridge University Press
ISBN: 1108482287
Category : Business & Economics
Languages : en
Pages : 465
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Book Description
Questions why species are becoming extinct, and how we can protect the natural world on which we all depend.
Author: Anna K. Behrensmeyer
Publisher: University of Chicago Press
ISBN: 0226041557
Category : Science
Languages : en
Pages : 588
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Book Description
Breathtaking in scope, this is the first survey of the entire ecological history of life on land—from the earliest traces of terrestrial organisms over 400 million years ago to the beginning of human agriculture. By providing myriad insights into the unique ecological information contained in the fossil record, it establishes a new and ambitious basis for the study of evolutionary paleoecology of land ecosystems. A joint undertaking of the Evolution of Terrestrial Ecosystems Consortium at the National Museum of Natural History, Smithsonian Institution, and twenty-six additional researchers, this book begins with four chapters that lay out the theoretical background and methodology of the science of evolutionary paleoecology. Included are a comprehensive review of the taphonomy and paleoenvironmental settings of fossil deposits as well as guidelines for developing ecological characterizations of extinct organisms and the communities in which they lived. The remaining three chapters treat the history of terrestrial ecosystems through geological time, emphasizing how ecological interactions have changed, the rate and tempo of ecosystem change, the role of exogenous "forcing factors" in generating ecological change, and the effect of ecological factors on the evolution of biological diversity. The six principal authors of this volume are all associated with the Evolution of Terrestrial Ecosystems program at the National Museum of Natural History, Smithsonian Institution.
