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: 2489
Relative yield of two transferrin phenotypes in coho salmon
Experimental groups of coho salmon (Oncorhynchus kisutch) of transferring types AA and AC were compared to determine relative growth and survival before release, yields from the fishery, and returns of fish to the hatchery as 2- and 3-yr-olds. In the hatchery, growth was faster and survival higher in the AA than in the AC types. However, yields of AA and AC types were equal, although the yield of
Authors
John D. McIntyre, A. Kenneth Johnson
Influence of water temperature on gill sodium, potassium-stimulated ATPase activity in juvenile coho salmon (Oncorhynchus kisutch)
1. Gill sodium, potassium-stimulated ATPase activity was determined from December to July in gills of yearling coho salmon (Oncorhynchus kisutch) maintained at four temperatures, 6, 10, 15 and 20°C.2. Compared to fish held at 6°C, elevation in ATPase activity and the associated parr-smolt transformation were accelerated in fish at 10 and 15°C whereas animals at 20°C experienced at best only a tran
Authors
W.S. Zaugg, L. R. McLain
Problems in the physiological monitoring of wild fish populations
No abstract available
Authors
R.S. Wydoski, Gary Wedemeyer
Prevention and control of viral diseases of salmonids
Three viral diseases of salmonids are of worldwide concern: infectious pancreatic necrosis (IPN) viral hemorrhagic septicemia (VHS), and infectious hematopoietic necrosis (IHN). Six principal approaches are being used to prevent or control these diseases: 1) preventing contact o the pathogen with the host, 2) environmental manipulation, 3) immunization, 4) chemotherapy, 5 selective breeding for di
Authors
Donald F. Amend
Physiological response of juvenile coho salmon (Oncorhynchus kisutch) and rainbow trout (Salmo gairdneri) to handling and crowding stress in intensive fish culture
Moving 4–5-in. coho salmon (Oncorhynchus kisutch) held in soft (20 ppm CaCO3) water from the relatively light loading density of 0.5 lb/ft3 to 1, 2, or 4 lb/ft3 (density index, DI = 0.1, 0.2, 0.4, 0.8) caused significant stress as indicated by loss of feeding behavior, but only minimal physiological disturbances, as indicated by lack of hyperglycemia or hypochloremia. However, moving them to 6 or
Authors
Gary A. Wedemeyer
Physiological response to hooking stress in hatchery and wild rainbow trout (Salmo gairdneri)
This study evaluated the physiological response of rainbow trout to hooking stress after being played under standardized conditions (0–5 min) and estimated the time needed for recovery (to 72 h). Plasma osmolality and chloride measurements were used to evaluate osmoregulatory disturbances and gill ion-exchange function, and plasma glucose was used as an index of the generalized nonspecific physiol
Authors
R.S. Wydoski, Gary Wedemeyer, N. C. Nelson
Detection and transmission of infectious hematopoietic necrosis virus in rainbow trout
Detection and transmission of Infectious Hematopoietic Necrosis Virus in rainbow trout (Salmo gairdneri) was studied at a commercial trout hatchery. Transmission of virus was demonstrated via water, feed and contaminated eggs. If eggs from carrier females were incubated several weeks in virus-free water, the resulting fry did not become infected. However, if fry subsequently became infected they w
Authors
Donald F. Amend
Fish viral diseases: clinical, histopathological, and comparative aspects
No abstract available
Authors
W. T. Yasutake
Pathophysiology of infectious hematopoietic necrosis virus disease in rainbow trout: hematological and blood chemical changes in moribund fish
Infectious hematopoietic necrosis (IHN) is a rhabdoviral disease of rainbow trout (Salmo gairdneri). Trout were injected with IHNV, and various hematological and biochemical measurements of clinically ill fish were compared to uninfected controls. Infected fish had reduced corpuscular counts, hemoglobin, and packed cell volume, but normal mean corpuscular volume, mean corpuscular hemoglobin, and m
Authors
D.F. Amend, L. Smith
Gas bubble disease: mortalities of coho salmon, Oncorhynchus kisutch, in water with constant total gas pressure and different oxygen-nitrogen ratios
A review of the literature regarding gas-bubble disease can be found in a recent publication by Rucker (1972); one by the National Academy of Science (Anonymous in press); and an unpublished report by Weitkamp and Katz (1973)." Most discussions on gas-bubble disease have dealt with the inert gas, nitrogen-oxygen was given a secondary role. It is important to know the relationship of nitrogen and o
Authors
R.R. Rucker
Kidney disease postorbital lesions in spring chinook salmon (Oncorhynchus tshawytscha)
Gross exophthalmos in one or both eyes of yearling spring chinook salmon (Oncorhynchus tshawytscha) was caused by postorbital, granulomatous inflammatory tissue that developed in response to invasion of the site by Corynebacterium sp., the causative agent of bacterial kidney disease.
Authors
Jerry D. Hendricks, Steve L. Leek