The Evolution of the Long-necked Giraffe (Giraffa Camelopardalis L.)

The Evolution of the Long-necked Giraffe (Giraffa Camelopardalis L.)

Author: Wolf-Ekkehard Lönnig

Publisher: MV-Verlag

Published: 2011

Total Pages: 146

ISBN-13: 3869914718

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"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."


Giraffe

Giraffe

Author: Anne Innis Dagg

Publisher: Cambridge University Press

Published: 2014-01-23

Total Pages: 261

ISBN-13: 1107034868

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An up-to-date portrait of the giraffe, summarising current knowledge on their biology and behaviour along with current conservation efforts.


Giraffe Reflections

Giraffe Reflections

Author: Dale Peterson

Publisher: Univ of California Press

Published: 2013-09-09

Total Pages: 230

ISBN-13: 0520266854

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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.


Star Tales

Star Tales

Author: Ian Ridpath

Publisher: BoD – Books on Demand

Published: 2018-01-01

Total Pages: 226

ISBN-13: 0718894782

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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.


The Giraffe

The Giraffe

Author: Bryan Shorrocks

Publisher: John Wiley & Sons

Published: 2016-10-31

Total Pages: 248

ISBN-13: 1118587472

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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


Terrestrial Ecosystems Through Time

Terrestrial Ecosystems Through Time

Author: Anna K. Behrensmeyer

Publisher: University of Chicago Press

Published: 1992-08-15

Total Pages: 588

ISBN-13: 0226041557

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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.


Biological Extinction

Biological Extinction

Author: Partha Dasgupta

Publisher: Cambridge University Press

Published: 2019-09-05

Total Pages: 465

ISBN-13: 1108482287

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Questions why species are becoming extinct, and how we can protect the natural world on which we all depend.


Biological Evolution

Biological Evolution

Author: Mike Cassidy

Publisher: Cambridge University Press

Published: 2020-11-19

Total Pages: 368

ISBN-13: 1009028189

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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.


Giraffes Have Long Necks

Giraffes Have Long Necks

Author: Katie Marsico

Publisher: Cherry Lake

Published: 2014-08-01

Total Pages: 28

ISBN-13: 1631880896

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Young children are naturally curious about animals. Tell Me Why Giraffes Have Long Necks offers answers to their most compelling questions about this long-necked animal that uses its height to reach leaves at the very top of trees. Age-appropriate explanations and appealing photos encourage readers to continue their quest for knowledge. Additional text features and search tools, including a glossary and an index, help students locate information and learn new words.


Mammalian Sexuality

Mammalian Sexuality

Author: Alan F. Dixson

Publisher: Cambridge University Press

Published: 2021-06-03

Total Pages: 405

ISBN-13: 1108426182

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The first detailed account of post-copulatory sexual selection and the evolution of reproduction in mammals.