Publications
This list of publications includes peer-review journal articles, official USGS publications series, reports and more authored by scientists in the Ecosystems Mission Area. A database of all USGS publications, with advanced search features, can be accessed at the USGS Publications Warehouse.
Filter Total Items: 41763
Biological data on PCBs in animals other than man
SUMMARY: Polychlorinated biphenyls have become ubiquitous in the world ecosystem in quantities similar to those of DDE. Experimental studies have shown that PCBs have a toxicity to mallards, pheasants, bobwhite quail, coturnix quail, red-winged blackbirds, starlings, cowbirds, and grackles that is of the same order as the toxicity of DDE to these species. Overt signs of poisoning also are si
Authors
L. F. Stickel
Population ecology and environmental pollution: Red-tailed and Cooper's hawks
No abstract available.
Authors
C. J. Henny, H. M. Wight
Los plaguicidas y la contaminacion del medio ambiente Venezolano
RESUMEN DE RECOMENDACIONES Recomendaciones para el Programa de Investigacion: 1. Establecer un sistema de muestreo biologico para detectar los niveles tendencias de los productos quimicos toxicos en un peque?o numero de si tios representativos. 2. Mantener continua vigilancia de la contaminacion ambiental, mediante la seleccion acertadamente dirigida de las zonas afectadas y de las fu
Authors
L. F. Stickel, W. H. Stickel
Time lapse ecology, Muskeget Island, Nantucket, Massachusetts
No abstract available.
Authors
D.K. Wetherbee, R.P. Coppinger, R.E. Walsh
Duck hepatitis virus Interactions with DDT and dieldrin in adult mallards
There has been considerable speculation regarding possible imteractlons within biological systems between synthetic environmental pollutants and infectious disease agents (1-11). This type of interaction has been studied in our laboratory using the mallard, Anas platyrhynchos, as a test species (5,6). Since adult ducks are refractory to the overt manifestations of duck virus hepatitis (DVH) (12) a
Authors
Milton Friend, D.O. Trainer
Location and description of spiral-shaped microorganisms in the normal rat cecum
Some indigenous microorganisms have been shown to localize in certain anatomical sites of the digestive tract of mammals. We studied the ceca of normal adult rats by light and electron microscopy to determine whether any specific bacterial population localizes in this area. All rats studied showed that the crypt was packed with organisms whose morphological character differs from those of the ceca
Authors
Charles P. Davis, D. Mulcahy, A. Takeuchi, D.C. Savage
Investigations of the lipopolysaccharide fractions from Aeromonas salmonicida smooth and rough forms
No abstract available
Authors
D. P. Anderson
Survey for infectious hematopoietic necrosis (IHN) virus in Washington salmon
A virus disease of juvenile sockeye salmon (Oncorhynchus nerka) has been a problem in Washington hatcheries since first reported by Rucker [9] in 1953. Presumably, the same disease has occurred in Oregon, and it is now referred to as the Oregon, and it is now referred to as the Oregon sockeye disease (OSD) or the sockeye salmon virus (SSV) [8,12]. The primary source of the disease was thought to b
Authors
Donald F. Amend, James W. Wood
An improved method for isolating viruses from asymptomatic carrier fish
This paper describes a method using elevated levels of penicillin, streptomycin, and nystatin instead of filters to control bacteria and mold contaminants in specimens processed for virus isolation. Filters were shown to significantly reduce the virus concentration. Virus and tissue cultures were not affected by this procedure. In field tests nearly three times more specimens were positive for vir
Authors
Donald F. Amend, John P. Pietsch