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Publications

Below is a list of available WFRC peer reviewed and published science.

Filter Total Items: 2562

Adsorption to fish sperm of vertically transmitted fish viruses Adsorption to fish sperm of vertically transmitted fish viruses

More than 99 percent of a vertically transmitted fish rhabdovirus, infectious hematopoietic necrosis virus, was removed from suspension in less than 1 minute by adsorption to the surface membrane of sperm from two genera of salmonid fishes. The vertically transmitted, infectious pancreatic necrosis virus adsorbed to a lesser degree, but no adsorption occurred with a second fish...
Authors
D. Mulcahy, R.J. Pascho

Assessing the tolerance of fish and fish populations to environmental stress: The problems and methods of monitoring Assessing the tolerance of fish and fish populations to environmental stress: The problems and methods of monitoring

Environmental stress is an inescapable aspect of life in the aquatic environment. The chemical and physical demands of life underwater impose somewhat rigorous constraints on aquatic species (Smith, 1982a). Superimposed on such demands may be the additional. physiological constraints of particular ecological niches. It is true that aquatic species are adapted to these conditions, but...
Authors
Gary Wedemeyer, D. McLeay, C.P. Goodyear

Detection of infectious haematopoietic necrosis virus in river water and demonstration of waterborne transmission Detection of infectious haematopoietic necrosis virus in river water and demonstration of waterborne transmission

In a study of the possible role of waterborne infectious haematopoietic necrosis virus in transmission of the disease among spawning sockeye salmon, Oncorhynchus nerka (Walbaum), both infection rates and virus titres were higher in fish held at high density in a side channel than in fish in the adjacent river. Virus was never isolated from river water, but was found in water from the...
Authors
D. Mulcahy, R.J. Pascho, C.K. Jenes

Titre distribution patterns of infectious haematopoietic necrosis virus in ovarian fluids of hatchery and feral salmon populations Titre distribution patterns of infectious haematopoietic necrosis virus in ovarian fluids of hatchery and feral salmon populations

Infectious haematopoietic mecrosis virus (IHNV) is enzootic in virtually all populations of sockeye salmon, Oncorhynchus nerka (Walbaum), and in populations of chinook salmon, O. tshawytscha (Walbaum), of the Sacramento River drainage in California. This disease is an obstacle in hatcheries using brood stocks from these populations. However, naturally spawning sockeye salmon are highly...
Authors
D. Mulcahy, R.J. Pascho, C.K. Jenes

Mortality due to infectious hematopoietic necrosis of sockeye salmon (Oncorhynchus nerka) fry in streamside egg incubation boxes Mortality due to infectious hematopoietic necrosis of sockeye salmon (Oncorhynchus nerka) fry in streamside egg incubation boxes

Infectious hematopoietic necrosis virus caused mortality of sockeye salmon (Oncorhynchus nerka) in streamside egg incubation boxes. Virus was not detectable in eggs or alevins; its first isolation coincided with the appearance of dead fish in a trap on the outflow from the box. Mortality due to the virus did not occur in every egg box studied. However, when fry from the boxes were held...
Authors
D. Mulcahy, R.J. Pascho, C.K. Jenes

Tolerance to gas supersaturation in freshwater and seawater by steelhead trout (Salmo gairdneri) Tolerance to gas supersaturation in freshwater and seawater by steelhead trout (Salmo gairdneri)

The euryhaline status of steelhead trout, Salmo gairdneri, smolts was challenged in sea water for 2 weeks after which half of the total fish population was returned to fresh water. Acclimation continued and created two test populations in 29%osea water and fresh water. Subsequently these fish were exposed in fresh water or sea water to approximately equal hyperbaric dissolved total gas...
Authors
G.R. Bouck, R.E. King
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