Notes on the Principles of Quadrupedal Locomotion and of the Mechanism of the Limbs in Hoofed Animals PDF Download

Author: Bashford Dean
Publisher:
ISBN:
Category : Animal locomotion
Languages : en
Pages : 554

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Author: Thomas Lincoln Casey
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 588

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Records of meetings 1808-1916 in v. 11-27.

Author: American Museum of Natural History
Publisher:
ISBN:
Category : Anthropology
Languages : en
Pages : 850

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Comprises articles on geology, paleontology, mammalogy, ornithology, entomology, and anthropology.

Author: William King Gregory
Publisher:
ISBN:
Category :
Languages : en
Pages : 528

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Author:
Publisher:
ISBN:
Category : Mammals
Languages : en
Pages : 610

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Author: Henry Fairfield Osborn
Publisher:
ISBN:
Category :
Languages : en
Pages : 720

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Author: Henry Fairfield Osborn
Publisher:
ISBN:
Category : Brontotheriidae
Languages : en
Pages : 786

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Author: Kenneth P. Dial
Publisher: University of Chicago Press
ISBN: 022626839X
Category : Science
Languages : en
Pages : 435

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How did flying birds evolve from running dinosaurs, terrestrial trotting tetrapods evolve from swimming fish, and whales return to swim in the sea? These are some of the great transformations in the 500-million-year history of vertebrate life. And with the aid of new techniques and approaches across a range of fields—work spanning multiple levels of biological organization from DNA sequences to organs and the physiology and ecology of whole organisms—we are now beginning to unravel the confounding evolutionary mysteries contained in the structure, genes, and fossil record of every living species. This book gathers a diverse team of renowned scientists to capture the excitement of these new discoveries in a collection that is both accessible to students and an important contribution to the future of its field. Marshaling a range of disciplines—from paleobiology to phylogenetics, developmental biology, ecology, and evolutionary biology—the contributors attack particular transformations in the head and neck, trunk, appendages such as fins and limbs, and the whole body, as well as offer synthetic perspectives. Illustrated throughout, Great Transformations in Vertebrate Evolution not only reveals the true origins of whales with legs, fish with elbows, wrists, and necks, and feathered dinosaurs, but also the relevance to our lives today of these extraordinary narratives of change.

Author: John L. Gittleman
Publisher: Cornell University Press
ISBN: 1501745816
Category : Science
Languages : en
Pages : 639

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The mammalian order Carnivora is characterized by an incredible range of morphological, ecological, and behavioral variation. Carnivores can be as small as the 100-gram least weasel or as large as the 800-kilogram polar bear. Their reproductive rate can vary from one offspring every five years, as with some black bears, to three litters a year, as with the dwarf mongoose. Group sizes can be traced along a wide continuum, from the solitary ermine to the monogamous golden jackal to the large extended packs of as many as 80 spotted hyenas. Until recently the general habits of most wild carnivore species were inadequately understood. In the last decade, however, improved technologies, including the use of radiotelemetry and night-vision scopes, have led to many important discoveries. This book is at once a critical summary and an evaluation of current research on carnivores. A worthy successor to R.F. Ewer's monumental volume, The Carnivores (Cornell University Press), it is the work of 30 leading carnivore biologists, who here assemble comparative data on the basic anatomical, behavioral, ecological, physiological, reproductive, and evolutionary characteristics of this group. After a general introduction to the Carnivora, the volume is divided in three parts, each of which begins with a brief introduction outlining its main themes. Part I, Behavior, covers acoustic and olfactory communication, behavioral development, behavioral ecology of canids and hyaenids, modes of solitary living, and group living. In Part II, Ecology, topics include feeding ecology of the giant panda and Asiatic black bear, adatpations for aquatic living, ecological constraints on predation in felids, consequences of small size in mustelids, rate of basal metabolism and food habits, and reproductive output. Part III, Evolution, deals with the morphological approaches to phylogeny, and the fossil record. An appendix presents a complete classification of the Carnivora, including topics of continuing controversy. Highlighting recent developments in the study of the Carnivora and areas for further research, this broad synthesis will be of great value of students and researchers in animal behavior, behavioral ecology, wildlife ecology, mammalogy, paleontology, systematics, and evolution theory. It will also encourage realistic conservation programs to manage rapidly diminishing populations and will elucidate particular features of the carnivores for nonspecialist readers.

Author: Leverett Allen Adams
Publisher:
ISBN:
Category :
Languages : en
Pages : 286

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