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Author: Harry M. Ohlendorf
Publisher:
ISBN:
Category : Anhinga anhinga
Languages : en
Pages : 100
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Book Description
In 1972 and 1973 we collected 1,339 clutches of eggs of anhingas (Anhinga anhinga) and 17 species of waders (herons, egrets, bitterns, ibises, and storks). We analyzed the eggs for organochlorine residues and compared shell thickness of these eggs and others collected since 1946 (and now in museum collections) with shell thickness of eggs collected before the widespread use of organochlorine pesticides. Eggshells were significantly thinner in one or more regions for the post-1946 samples of anhinga, great blue heron, black-crowned night heron, and wood stork. We detected no significant change in the other species.
Author: Harry M. Ohlendorf
Publisher:
ISBN:
Category : Anhinga anhinga
Languages : en
Pages : 100
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Book Description
In 1972 and 1973 we collected 1,339 clutches of eggs of anhingas (Anhinga anhinga) and 17 species of waders (herons, egrets, bitterns, ibises, and storks). We analyzed the eggs for organochlorine residues and compared shell thickness of these eggs and others collected since 1946 (and now in museum collections) with shell thickness of eggs collected before the widespread use of organochlorine pesticides. Eggshells were significantly thinner in one or more regions for the post-1946 samples of anhinga, great blue heron, black-crowned night heron, and wood stork. We detected no significant change in the other species.
Author: U.S. Fish and Wildlife Service
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Author: Harry M. Ohlendorf
Publisher:
ISBN:
Category : Anhinga anhinga
Languages : en
Pages : 100
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Book Description
In 1972 and 1973 we collected 1,339 clutches of eggs of anhingas (Anhinga anhinga) and 17 species of waders (herons, egrets, bitterns, ibises, and storks). We analyzed the eggs for organochlorine residues and compared shell thickness of these eggs and others collected since 1946 (and now in museum collections) with shell thickness of eggs collected before the widespread use of organochlorine pesticides. Eggshells were significantly thinner in one or more regions for the post-1946 samples of anhinga, great blue heron, black-crowned night heron, and wood stork. We detected no significant change in the other species.
Author: Harry M. Ohlendorf
Publisher:
ISBN:
Category : Anhinga anhinga
Languages : en
Pages : 94
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Book Description
Author: Calvin M. Menzie
Publisher:
ISBN:
Category : Anhinga anhinga
Languages : en
Pages : 45
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Book Description
Author:
Publisher:
ISBN:
Category : Environmental monitoring
Languages : en
Pages : 158
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Book Description
Author: National Research Council
Publisher: National Academies Press
ISBN: 0309036453
Category : Science
Languages : en
Pages : 401
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Book Description
This volume explores how the scientific tools of ecology can be used more effectively in dealing with a variety of complex environmental problems. Part I discusses the usefulness of such ecological knowledge as population dynamics and interactions, community ecology, life histories, and the impact of various materials and energy sources on the environment. Part II contains 13 original and instructive case studies pertaining to the biological side of environmental problems, which Nature described as "carefully chosen and extremely interesting."
Author: Silas Jackson
Publisher:
ISBN:
Category : Poisons
Languages : en
Pages : 52
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Book Description
Author: James P. Meador
Publisher: CRC Press
ISBN: 9781566700719
Category : Science
Languages : en
Pages : 516
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Book Description
Many books have been written about the effects of toxic chemicals on wildlife, but none has focused on the practical question, "How much of a chemical in the tissues of an animal is harmful?" This book deals exclusively with that question. This comprehensive reference will certainly become the standard resource on the topic, offering authoritative and sound advice on many environmental contaminants. With chapters written by outstanding experts in their respective fields, this is not only a scholarly collection of discussions on different chemicals, but, for those who have the day-to-day task of evaluating the harm of environment contaminants to wildlife, this book will provide answers on, for example, how to interpret 1 ppm lead in the liver of a duck or fish. The authors explain the snags of interpreting data that are sometimes conflicting or insufficient, providing the reader with helpful advice on how to cope with such data. Each chapter reviews literature on a specific chemical, followed by a easy-to-understand summary providing technical guidance. For many years this book will remain the preeminent reference on how to interpret contaminant levels of organochlorine pesticides, PCBs, dioxins, PAHs, metals, selenium, and fluorides in wildlife.
Author: Michael L. Morrison
Publisher: Johns Hopkins University Press
ISBN: 1421424711
Category : Science
Languages : en
Pages : 1017
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Book Description
Wood, Robert M. Zink, Benjamin Zuckerberg
