Bulletin of the American Museum of Natural History PDF Download
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Author: Joel Asaph Allen
Publisher:
ISBN:
Category : Natural history
Languages : en
Pages : 736
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Book Description
Comprises articles on geology, paleontology, mammalogy, ornithology, entomology and anthropology.
Author: Joel Asaph Allen
Publisher:
ISBN:
Category : Natural history
Languages : en
Pages : 736
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Book Description
Comprises articles on geology, paleontology, mammalogy, ornithology, entomology and anthropology.
Author:
Publisher:
ISBN:
Category : Paleontology
Languages : en
Pages : 504
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Book Description
Author: Xiaoming Wang
Publisher:
ISBN:
Category : Canidae, Fossil
Languages : en
Pages : 391
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Book Description
Author: Richard H. Tedford
Publisher:
ISBN:
Category : Canidae, Fossil
Languages : en
Pages : 218
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Book Description
Author: Julius van der Werf
Publisher: Springer Science & Business Media
ISBN: 1402090056
Category : Science
Languages : en
Pages : 256
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Book Description
Fitness and adaptation are fundamental characteristics of plant and animal species, enabling them to survive in their environment and to adapt to the inevitable changes in this environment. This is true for both the genetic resources of natural ecosystems as well as those used in agricultural production. Extensive genetic variation exists between varieties/breeds in a species and amongst individuals within breeds. This variation has developed over very long periods of time. A major ongoing challenge is how to best utilize this variation to meet short-term demands whilst also conserving it for longer-term possible use. Many animal breeding programs have led to increased performance for production traits but this has often been accompanied by reduced fitness. In addition, the global use of genetic resources prompts the question whether introduced genotypes are adapted to local production systems. Understanding the genetic nature of fitness and adaptation will enable us to better manage genetic resources allowing us to make efficient and sustainable decisions for the improvement or breeding of these resources. This book had an ambitious goal in bringing together a sample of the world’s leading scientists in animal breeding and evolutionary genetics to exchange knowledge to advance our understanding of these vital issues.
Author:
Publisher:
ISBN:
Category : Fossils
Languages : en
Pages : 58
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Book Description
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.
Author: Rijksmuseum van Natuurlijke Historie te Leiden
Publisher:
ISBN:
Category : Natural history
Languages : nl
Pages : 594
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Book Description
Author: John Campbell Merriam
Publisher:
ISBN:
Category : Canidae, Fossil
Languages : en
Pages : 108
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Book Description
Author: Marc Zabludoff
Publisher: Marshall Cavendish
ISBN: 9780761439981
Category : Juvenile Nonfiction
Languages : en
Pages : 40
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Book Description
Another bright, warm day and the sunlight sparkles off the ripples on the surface of the sea. It practically hums with the busy motion of life. Fish of all sizes and colors glisten as they dart about, their bodies and tails vibrating from side to side. A giant is gliding through the water as well just below the surface. Its head rises above the water. The ancient king of the seas has arrived-Basilosaurus! Book jacket.
