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Browse more than 160,000 publications authored by our scientists over the past 100+ year history of the USGS.  Publications available are: USGS-authored journal articles, series reports, book chapters, other government publications, and more.

Filter Total Items: 171126

The bacterial diseases of fish

Of all the diseases responsible for the losses in the hatchery, those caused by the microscopic one-celled organisms, the bacteria, are the most common and present the most serious problem to the hatcheryman. They are found at practically every trout and salmon hatchery during some period of the year. The symptoms of the diseases they cause are difficult to recognize. This in itself is a hazard be
Authors
F. F. Fish

The Bureau of Fisheries disease service

Picture yourself bending over a trough picking eggs. The clatter of hoofs suddenly rings from the snow-covered hatchery roof—or if you must be technical—from the driveway. The hatchery door opens and in walks a bewhiskered gentleman wearing a brilliant red suit—it's Santa Claus. He walks slowly over to where you are standing—he speaks—
Authors
F. F. Fish

The Contact mining district, Nevada

No abstract available.
Authors
F. C. Schrader

The Gold Hill Mining District, Utah

The Gold Hill quadrangle is in west central Utah and is limited by parallels 40? and 40?15' and meridians 113?45' and 114?. This area includes the norlh end of the Deep Creek Mountains, one of the ranges in the Great Basin. The climate of the region, like that of the major province, is relatively arid, the average annual rainfall being about 13 inches.
Authors
T.B. Nolan

The microscope in the hatchery

Without the aid of the microscope, it is safe to assume that fish Culture would now stand exactly where it did seventy-five years ago when methods of artificial fertilization were first applied. It is also safe to assume that the results from fish culture would be as unsatisfactory as they were at that time when the fishery resources were steadily declining in spite of the increased liberation of
Authors
F. F. Fish