Publications
USGS divers in the Elwha River
WFRC zebrafish laboratory
Processing a Lost River sucker
Below is a list of available WFRC peer reviewed and published science.
Filter Total Items: 2488
Histopathologic changes of a virus-like disease of sockeye salmon
Rucker et al., (1953) described a disease of sockeye salmon (Oncorhynchus nerka) of possible viral etiology. First seen in Washington in 1951 with relatively minor losses, the disease recurred in 1952 killing over two million fingerling salmon with a mortality rate of 91.5 percent (Watson, 1954). In 1953, the disease was present in every sockeye salmon hatchery in the state. Rucker, Watson and the
Authors
E. M. Wood, W. T. Yasutake
Tissue damage in salmonids caused by Halisidota argentata Packard
During the histological examination of a collection of wild and hatchery salmonids, a peculiar foreign body was occasionally observed in various organs, particularly in the viscera. These objects, usually accompanied by a focal inflammation, were observed in 10 of 75 samples of wild trout and salmon collected in Oregon and Washington and were believed to represent an unknown type of parasitism. Th
Authors
E. M. Wood, W. T. Yasutake
Histopathology of fish. III. Peduncle ("cold-water") disease
No abstract available.
Authors
E. M. Wood, W. T. Yasutake
Histopathology of fish. II. The salmon-poisoning fluk
THE SALMON-POISONING FLUKE is misnamed as far as the fish culturist is concerned, for the disease affects dogs, not fish. There is considerable evidence, however, that fish may also suffer from the complex chain of events leading from snail to dying dog. Histological studies indicate that young salmon and trout may be severely damaged by the encysted stage of the fluke.
Histopathology of fish. IV. A granuloma of brook trout
In the summer of 1952, Snieszko and Griffin (1955) diagnosed kidney disease in brook trout from the Fish and Wildlife Service's station at Berlin, New Hampshire. During the examination of these fish, a peculiar lesion was observed in the vicinity of the gastric caeca. In very advanced cases, hard, glistening, white masses of tissue bearing a striking resemblance to mature testes often filled the a
Authors
E. M. Wood, W. T. Yasutake
The killifish, fundulus heteroclitus, second intermediate host of the trematode, Ascocotyle (Phagicola) dimunuta
Ascocotyle (Phagicola) diminuta was described by Stunkard and Haviland (1924)from the intestine of wild rats collected at the Clason Point dump near New York by the City Board of Health. Feeding experiments have demonstrated that metacercariae encysted in the gills of the common killifish, Fundulus hetero clitus, are stages in the life-cycle of this parasite. The larvae have been found also, altho
Authors
H. W. Stunkard, Joseph R. Uzmann
Infectious pancreatic necrosis in brook trout
No abstract available.
Authors
E. M. Wood, S. F. Snieszko, W. T. Yasutake
A mycosis-like granuloma of fish
Mycoses of systemic distribution are rarely observed in fresh-water fish in this country. In a recent review of atypical cell growths in fishes, Nigrelli cited the only known instance of a mycetoma in a North American fresh-water fish which occurred in the head of fingerling landlocked salmon from an Idaho hatchery. The fungus associated with this granuloma was characterized by a branching septate
Authors
E. M. Wood, W. T. Yasutake, W. L. Lehman
Histopathology of fish: I. Techniques and principles
The techniques of histopathology have been used for many years in the study of human and animal diseases. Until very recent times, however, histology has been applied to fish studies only very infrequently. This brief discussion is intended to acquaint the reader with the techniques and principles involved and to explain how histological studies may help to overcome fish diseases and nutritional p
Authors
E. M. Wood, W. T. Yasutake
Sulfonamide toxicity in brook trout
Sterility was observed in female brook trout that were treated with sulfamerazine at frequent intervals for 2 years to control endemic furunculosis. Feeding sulfamerazine for a period of 8 months caused massive kidney damage similar to that observed in humans who develop allergies to “sulfa” drugs. Kidney damage of the type observed would probably cause renal insufficiency which would handicap any
Authors
E. M. Wood, W. T. Yasutake, S. F. Snieszko
Infectious diseases of Pacific salmon
Investigations on infectious diseases of Pacific salmon due to micro-organisms other than viruses are reviewed. The etiological agents include trematodes, fungi, protozoa and bacteria. Bacteria have been found to be the most important agents of disease in the several species of Pacific salmon. Kidney disease, due to a small, unnamed Gram-positive diplobacillus, causes serious mortalities in young
Authors
Robert R. Rucker, B. J. Earp, E. J. Ordal