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
A bacterial disease of yellow perch (Peres flavescens)
On May 26, 1959, two of the authors' investigated a fish kill at Dailey Lake, Park County, Montana. They observed about a half-dozen live, weakly swimming yellow perch (Perca flavescens), in addition to thousand of dead perch along the shoreline. It was learned from local residents that mortalities had begun to appear some 2 weeks earlier. At that time the time the authorities had diagnosed the co
Authors
A. J. Ross, P.R. Nordstrom, J.E. Bailey, J.H. Heaton
Chemical and histological studies of wild and hatchery salmon in fresh water
In a study of coho salmon (Oncorhynchus kisutch), the gross chemical and histological changes occurring over a 14-month period spent in fresh water were determined. The determinations were made at 3-month intervals on: 1) hatchery-reared fish, 2) fish hatchery-reared for 3, 6, 9, and 12 months and then planted in a controlled stream for the remainder of the period; and 3) an indigenous group of wi
Authors
E. M. Wood, W. T. Yasutake, J.E. Halver, A.N. Woodall
Ovarian fluid: Its role in fertilization
FISH-CULTURISTs, in general, do not agree as to the time of actual fertilization of artificially spawned salmonid eggs. Some fish-culturists believe that the eggs are fertilized in the milt before water is added, while others are equally certain that fertilization is not achieved until after water is added. This difference of opinion has probably existed since the advent of the dry spawning method
Authors
R.R. Rucker, J.F. Conrad, C.W. Dick
A Virus-like disease of chinook salmon
Consideration is given to a recurring disease of early feeding chinook salmon fingerlings at the Coleman, California, Federal Fish Cultural Station. The infection becomes manifest in the early spring months at low water temperatures and abates as the water temperature rises. Bacteriological studies have failed to yield the presence of a disease agent, either by cultural or staining procedures. The
Authors
A. J. Ross, J. Pelnar, R.R. Rucker
Collection and preservation of fish and other materials exposed to pesticides
The effects of pesticides on fish have become improtant to fish conservation since World War II, when DDT first came into common use. With the development of other potent insecticides and the increasing use of massive dosages in more recent years, the threat to fish and fish foods has increased. Fishery biologists have conducted some studies on the effects of insecticides, but it has been impossib
Authors
Oliver B. Cope
A comparative study of the causative agent of a mycobacterial disease of salmonid fishes. I. A comparison of the staining characteristics of the fish disease with human tuberculosis in sections stained by the Fite-Faraco and Ziehl-Neelsen methods
No abstract available
Authors
T. J. Parisot, A.H. Decker
An illuminator for observing and photographing precipitin reactions in agar
Abstract not available.
Authors
G.W. Klontz, G.J. Ridgway, G.P. Wilson
Preparation of monolayer cell cultures from tissues of some lower vertebrates
No abstract available.
Authors
K. Wolf, M. C. Quimby, E.A. Pyle, R.P. Dexter
Infectious pancreatic necrosis of trout I : a tissue-culture study
No abstract available.
Authors
K. Wolf, C.E. Dunbar, S. F. Snieszko