Download or read book Environmental Pollutants and Eggshell Thickness written by Harry M. Ohlendorf and published by . This book was released on 1979 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Environmental Pollutants and Eggshell Thickness Anhingas and Wading Birds in the Eastern United States written by U.S. Fish and Wildlife Service and published by . This book was released on 1979 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Environmental Pollutants and Eggshell Thickness written by Harry M. Ohlendorf and published by . This book was released on 1979 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Environmental Pollutants and Eggshell Thickness written by Calvin M. Menzie and published by . This book was released on 1978 with total page 45 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Environmental Pollutants and Eggshell Thickness written by Harry M. Ohlendorf and published by . This book was released on 1979 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Special Scientific Report wildlife written by and published by . This book was released on 1979 with total page 798 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Environmental Contaminants in Fish and Wildlife of the Lower Gila River Arizona written by and published by . This book was released on 1997 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Monthly Catalog of United States Government Publications written by and published by . This book was released on 1979 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Monthly Catalogue United States Public Documents written by and published by . This book was released on 1979 with total page 944 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dredge Spoil Disposal and PCB Contamination written by United States. Congress. House. Committee on Merchant Marine and Fisheries and published by . This book was released on 1980 with total page 720 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Habitat Preservation Abstracts written by and published by . This book was released on 1980 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Pesticides Monitoring Journal written by and published by . This book was released on 1980-06 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Water resources Investigations Report written by and published by . This book was released on 1993 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Detailed Study of Water Quality Bottom Sediment and Biota Associated with Irrigation Drainage in the Salton Sea Area California 1988 90 written by and published by . This book was released on 1993 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Documentation of a Computer Program Streamlink to Represent Direct flow Connections in a Coupled Ground water and Surface water Model written by Eric D. Swain and published by . This book was released on 1993 with total page 402 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Annual Report United States Fish and Wildlife Service written by U.S. Fish and Wildlife Service and published by . This book was released on 1979 with total page 406 pages. Available in PDF, EPUB and Kindle. Book excerpt:
