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: 41771
Parasites of freshwater fishes, II, Protozoa, 1, Microsporida of fishes
No abstract available.
Authors
R.E. Putz
Basic list of publications in English on fish diseases and parasites
No abstract available.
Authors
S. F. Snieszko, G. L. Hoffman, K. Wolf
Chemical characteristics of south-central Lake Huron
Water samples were collected for chemical analysis during eight cruises of the U.S. Bureau of Commercial Fisheries M/V CISCO in south-central Lake Huron in June-October 1956. Temperature, pH, conductivity, and the concentrations of Na+, K+, Ca++, C1-, SO4-, SiO2, and dissolved oxygen were determined for 233 samples from stations at the mouth of Saginaw Bay and along a transect from Harbor Beach, M
Authors
Herbert E. Allen
Insecticides: effects on cutthroat trout of repeated exposure to DDT
Cutthroat trout were periodically exposed to p, pp-DDT, in acetone solution or in the food. Excessive mortality occurred only in lots treated with high concentrations of DDT, probably as a result of decreased resistance to nonspecific stressors. Surviving fish in these lots were significantly larger than those in the control lot, or in the lots treated with low concentrations of DDT. The number an
Authors
Don Allison, Burton J. Kallman, Oliver B. Cope, Charles C. Van Valin
Reductive dechlorination of DDT to DDD by yeast
Labeled DDD [ 1,1-dichlor-o-2,2-bis(p-chlorophenyl)-ethane] was formed from C14-labeled DDT in the presence of yeast. The formation of DDD from DDE [1,1-dichloro-2,2-bis (p-chlorophenyl)-ethylene] was not observed, indicating that a reductive dechlorination of DDT occurs.
Authors
Burton J. Kallman, Austin K. Andrews
In vitro culture of the flagellate protozoan Hexamita salmonis
Trophozoites of Hexamita salmonis, asserted pathogen of juvenile salmonid fishes, were isolated from two species of Pacific salmon hosts and cultured repeatedly in an organic medium saturated with nitrogen. Primary isolates and serial subcultures usually exhibited five- to tenfold population increases per passage.
Authors
J. R. Uzmann, S.H. Hayduk
The Hexamita(= Octomitus) problem: A preliminary report
THE INTESTINAL FLAGELLATE, Hexamita salmonis (Moore), was described in 1922 from trout in hatcheries throughout New York State. At first associated with the so-called whirling disease of brook trout (Salvelinus fontinalis), now believed to be a virus disease, Hexamita was subsequently held responsible for practically any otherwise unexplainable mortality in underyearling salmonids. Over the years,
Authors
J. R. Uzmann, J.W. Jesse
Formalin in the Hatchery
FORMALIN is used extensively in hatcheries to control external parasites of fish. There are reports that formalin is toxic at some hatcheries, especially when used on rainbow trout (Salmo gairdneri). This is a discussion of the development of the use of formalin to control fish parasite-in the hatchery, its properties, and some experimental work.
Authors
R.R. Rucker, W.G. Taylor, D.P. Toney
Co-oxidation of the sulfur-containing amino acids in an autoxidizing lipid system
Oxidation of the sulfur amino acids by autoxidizing lipids was studied in a model system consisting of an amino acid dispersed in cold-pressed, molecularly distilled menhaden oil (20–80% w/w). Under all conditions investigated, cysteine was oxidized completely to cystine. Preliminary results suggest that at 110°C the oxidation follows first-order kinetics for at least the first 8 hr. A specific re
Authors
Gary Wedemeyer, A.M. Dollar
Mycobacteria in adult salmonid fishes returning to national fish hatcheries in Washington, Oregon and California in 1958-59
Incidence of acid-fast bacillus infections in salmonid fishes at West Coast hatcheries was determined for 1957-59. No evidence was obtained which would indicate a definite trend towards either increased or decreased rates of infection. It is apparent that the incidence of infection is higher in hatchery-marked fish than in unmarked fish. Only one hatchery was found free of infection during the 3 y
Authors
A. J. Ross
Fish and wildlife aspects of chemical mosquito control
No abstract available.
Authors
P. F. Springer