Results 121 to 130 of about 965 (180)

Ether Anesthesia of Steelhead Trout

Transactions of the American Fisheries Society, 1941
Abstract The use of anesthetics offers numerous advantages when handling, marking, or spawning fish which are susceptible to fungus diseases and injuries. Small trout were weighed and measured easily while anesthetized. Steelhead trout, under anesthesia, were very easy to spawn artificially and the loss from eggs so obtained was less than average ...
Francis P. Griffiths, Glaucus Webb, Phillip W. Schneider   +2 more
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Coronary Disease in Spawning Steelhead Trout Salmo gairdnerii

Science, 1968
Coronary degeneration was absent in young trout taken in fresh water and rare in immature fish at sea, but the incidence and severity were sharply greater in migrating fish and almost uniformly present in spawning fish. Several fish taken after they had reentered salt water after spawning had no lesions; lesions in fish taken during their second ...
R L, Van Citters, N W, Watson
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Retinopetal cells exist in the optic tectum of steelhead trout

Neuroscience Letters, 1989
The existence of retinopetal cells in the tectum of various teleost fishes as been claimed by several authors. Others, however, have been unable to verify such observations and attribute the findings of retrogradely labelled tectal cells to methodological problems. In this study cobalt-lysine and HRP have been used as neuronal tracers.
S O, Ebbesson, D L, Meyer
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Characteristics of Steelhead Trout Redds in Idaho Streams

Transactions of the American Fisheries Society, 1968
Abstract Steelhead spawning behavior and redd construction were studied in 1958 and 1959 in the Clearwater and Salmon River watersheds in Idaho. Steelhead began spawning in early April; spawning peaked between 20 April and 10 May at water temperatures of 36 to 47 F., and was over by 15 June.
Donald R. Orcutt, Ben R. Pulliam, Arthur Arp   +2 more
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Smoltification in steelhead trout (Salmo gairdneri): Developmental aspects of plasma constituents

Fish Physiology and Biochemistry, 1988
Selected biochemical parameters were measured in the plasma of both underyearling anadromous steelhead trout (Salmo gairdneri) and underyearling residentS. gairdneri. The analyses were conducted in an effort to determine whether or not there might be changes which could be associated with the parr-smolt transformation of anadromous strains. Plasma NH(+)
Bradley, Terence M., Rourke, A. W.
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Management of Steelhead Trout in the State of Washington

Transactions of the American Fisheries Society, 1955
Abstract The increase in the angling for steelhead trout (Salmo gairdneri irideus) since the end of World War II caused fishery biologists in the State of Washington to re-evaluate their management policies and to search for a means of building up runs of adult steelhead trout in depleted or heavily fished streams.
Ralph W. Larson, John M. Ward
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Effects of Pile-Driving Noise on Oncorhynchus mykiss (Steelhead Trout)

2012
Underwater sounds from anthropogenic sources may affect the behavior and physiology of aquatic organisms, including a variety of salmonid fishes protected under the US Endangered Species Act. One mechanism of effect is underwater sound generated by pile driving in and near aquatic habitats (Popper and Hastings 2009).
Richard, Oestman, Christopher J, Earle
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Scale Characteristics of Yearling Coastal Cutthroat and Steelhead Trout

Journal of the Fisheries Research Board of Canada, 1957
Some scale characteristics of 88 yearling coastal cutthroat trout (Salmo clarki clarki) and 96 yearling steelhead (Salmo gairdneri) were compared in some detail. Although the number of diagonal scale rows above the lateral line was significantly higher in cutthroat, the counts of the two species overlap.
E. H. Vernon, R. G. McMynn
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Toxicity of trivalent chromium to early life stages of steelhead trout

Environmental Toxicology and Chemistry, 1984
AbstractAcute and early life stage toxicity tests were conducted with trivalent chromium and steelhead trout (Salmo gairdneri). A 96-h LC50 of 4,400 μg/L chromium was obtained with two-month-old juvenile fish. Early life stage exposure from newly fertilized eggs to 30-d post-swimup produced complete mortality at 495 μg/L, and significantly reduced ...
Donald G. Stevens, Gary A. Chapman
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