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: 41918
The role of the International Association for Great Lakes Research in research of the Great Lakes
No abstract available.
Authors
John F. Carr
Open-jaw syndrome in chinook salmon (Oncorhynchus tshawytscha) at a hatchery
Nearly 0.5% of the yearling spring chinook salmon (Oncorhynchus tshawytscha) at a national fish hatchery were observed with mouth agape, the condition occurring in two of 16 ponds. X-radiographs and histological preparations indicated that the articular bone of the lower jaw was malformed and dislocated dorsal and posterior to its normal point of attachment. The bone appeared to be embedded in the
Authors
Dennis E. Crouch, William T. Yasutake, Robert R. Rucker
Computer program for sample sizes required to determine disease incidence in fish populations
A computer program is described for generating the sample size tables required in fish hatchery disease inspection and certification. The program was designed to aid in detection of infectious pancreatic necrosis (IPN) in salmonids, but it is applicable to any fish disease inspection when the sampling plan follows the hypergeometric distribution.
Authors
Frank J. Ossiander, Gary Wedemeyer
Scolecobasidium humicola, a fungal pathogen of fish
Scolecobasidium humicola, a previously undescribed fungal pathogen of fish was isolated from coho salmon (Oncorhynchus kisutch). In natural infections the kidney was the organ most affected. The disease was difficult to transmit experimentally and appeared to be only weakly contagious.
Authors
A. J. Ross, W. T. Yasutake
Some physiological aspects of sublethal heat stress in the juvenile steelhead trout (Salmo gairdneri) and coho salmon (Oncorhynchus kisutch)
A rapid (3 min) but sublethal temperature increase from 10 to 20 imposed a greater stress on juvenile coho salmon (Oncorhynchus kisutch) than on juvenile steelhead trout (Salmo gairdneri). Both species suffered hyperglycemia, hypocholesterolemia, increased blood hemoglobin, and decreased blood sugar regulatory precision, but the steelhead recovered more quickly. Acid–base equilibrium was essential
Authors
Gary Wedemeyer
Nutritional factors in the biochemical pathology of Corynebacterial kidney disease in the coho salmon (Oncorhynchus kisutch)
The influence of diet ingredient on the morbidity and biochemical pathogenesis of corynebacterial kidney disease was investigated using juvenile coho salmon (Oncorhynchus kisutch) fed the Abernathy dry ration made up with either corn gluten or cottonseed meal (isoprotein, isocaloric substitution). Evaluation of incidence of infection, pituitary activation and aspects of carbohydrate metabolism, ac
Authors
Gary A. Wedemeyer, A. J. Ross
Procedure for the manufacture of vaccines by means of glutaraldehyde (Procede de Fabrication de vaccins a l'Aide du Glutaraldehyde)
No abstract available.
Authors
Rocco C. Cipriano
Thickness of the American woodcock eggshell, 1971
Eggs or empty shells of the American woodcockwere collected from 10 states in 1971and shell thickness (mean of clutch means) was compared with that of eggs collected from 16 states during the years 1859-1939. The 1971 shells (n = 91) from hatched eggs or those containing fully developed embryos were about i0 percent thinner (P
Authors
J.F. Kreitzer
Effects of temperature on embryonic development of lake herring (Coregonus artedii)
Embryonic development of lake herring (Coregonus artedii) was observed in the laboratory at 13 constant temperatures from 0.0 to 12.1 C and in Pickerel Lake (Washtenaw County, Michigan) at natural temperature regimes. Rate of development during incubation was based on progression of the embryos through 20 identifiable stages.
An equation was derived to predict development stage at constant tempe
Authors
Peter J. Colby, L.T. Brooke
Epizootiology of infectious hematopoietic necrosis virus in salmonids
No abstract available
Authors
D.F. Amend, W. T. Yasutake, J. L. Fryer, K.S. Pilcher, W.H. Wingfield
Mercury residues in pintails breeding in North Dakota
Livers of 42 pintail hens (Anas acuta) breeding in eastern North Dakota during the spring and early summer of 1969 and 1970 were analyzed for total mercury by the neutron activation technique. Mercury content on a wet weight basis ranged from 0.055 ppm to 9.512 ppm and averaged 0.888 ± 1.796 ppm (SD). Liver mercury levels of hens collected in early spring (prior to planting of crops) were signific
Authors
G.L. Krapu, G.A. Swanson, H.K. Nelson
An incident of fenthion mosquito control and subsequent avian mortality
Mass mortality among migratory birds at Grand Forks, North Dakota, was attributed to a mosquito control operation employing the insecticide fenthion. The factors involved may have included the toxicity of the pesticide for birds, the method of application and coincidence with the peak of the spring warbler migration.
Authors
R.W. Seabloom, G.L. Pearson, L.W. Oring, J.R. Reilly