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Showing 1 to 20 of 169 for “"Rainbow Trout"”.
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The fluvial biology of Lake Taupo rainbow trout
The riverine biology of adfluvial-lacustrine rainbow trout (Oncorhynchus mykiss, previously Salmo gairdneri) from the Waimarino, Tokaanu, and Hinemaiaia Rivers was investigated. These three streams are important spawning and rearing habitats for rainbow trout recruiting to an economically important …
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Bioenergetics of Rainbow Trout in Lake Oahe, South Dakota
Rainbow trout Oncorhynchus mykiss have been stocked in Lake Oahe, South Dakota for the past 25 years. In recent years spawning runs of rainbow trout have increased, providing South Dakota Department of Game, Fish and Parks biologist the opportunity to substantially increase stocking rates. Concern …
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Growth and Characterization of Cell Cultures of Rainbow Trout
Gonad and spleen primary cultures of rainbow trout (Salmo gairdneri Richardson) were initiated and compared to the rainbow trout gonad transformed cell line RTG-2. The RTG-2 cell line grew faster than the gonad primary cultures. The chromosome number of the gonad primary culture was 2n=56 with 104 …
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Energetic costs of toxicant metabolism in rainbow trout ( Oncorhynchus mykiss)
Aquatic ecosystems are continuously exposed to a variety of environmental toxicants including polychlorinated biphenyls (PCBs). A portion of the energy assimilated by the fish is dedicated to detoxification. This study investigates the changes in energetic demands associated with increased …
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Characterization of Rapid Nongenomic Cortisol Signalling in Rainbow Trout Liver
… mechanisms of rapid cortisol signalling in rainbow trout (Oncorhynchus mykiss) liver. The hypothesis tested was that activation of secondary-signalling cascades would mediate rapid cortisol effects and glucocorticoid-membrane receptor(s) were involved in initiating this response. Indeed, …
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Evaluation of Diploid and Triploid Rainbow Trout in South Dakota Ponds
… indices (GSI) of triploid and diploid rainbow trout Oncorhynchus mykiss in natural systems. In May 1987, a-month old triploid and diploid rainbow trout were stocked in equal proportions into six ponds (1.0 - 2.5 hectares). Drought eliminated rainbow trout populations in three ponds. …
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Rainbow Trout Production and Water Quality in Eastern South Dakota Dugouts
Nine-hundred-fifty-four rainbow trout (Salmo gairdneri) were stocked into 18 eastern South Dakota dugouts in April 1980 to determine the feasibility of dugouts for raising annual fish crops. Trout growth was compared between dugouts by stocking rate (1977/ha, 1483/ha, 988/ha, and 494/ha) and …
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Food Habits and Growth of Rainbow Trout in a Prairie Pond
Rainbow trout (Salmo gairdneri) were introduced into Lower Abbey Pond, South Dakota, at a stocking rate of 772/ha in June 1977. Sampling was begun in January 1978 to determine food habits and growth of the fish. Trout and environmental samples were taken at 10 day or monthly intervals depending …
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Inbreeding in Rainbow Trout (Salmo gairdneri): Analysis of Lethal Temperature Tolerence
<p>Inbreeding in rainbow trout (Salmo gairdneri) was evaluated in relation to an altered environment (upper lethal temperature 29 C), at four levels of inbreeding. At each level of inbreeding mean time to death for inbred, female-outbred half-sib, male-outbred half-sib and outbred families were …
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Production of Triploid Rainbow Trout for Evaluation in South Dakota Waters
In September 1986, approximately 50,000 rainbow trout (Salmo gairdneri) eggs were fertilized and subjected to heat shocks to prevent expulsion of the second polar body, theoretically resulting in triploid embryos. Heat shocks were at 26 and 28°c, began 10, 20, 30, or 40 min after fertilization, and …
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Cholesterol supplementation in plant-based diets for rainbow trout (Oncorhynchus mykiss)
… and proteins with plant proteins and oils in rainbow trout diets reduces growth performance and feed intake. It has been suggested that this is due to the presence of growth factors present in marine products but absent in plant ingredients. One putative factor is cholesterol. Thus, the effect …
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The Genetic Architecture of Juvenile Migration in Rainbow Trout (Oncorhynchus mykiss)
… best displayed amongst salmonid fishes (salmon, trout, and char) who exhibit variation in the propensity to migrate both within and among species. Rainbow and steelhead trout (Oncorhynchus mykiss), members of the salmonid family of fishes, capture this variation throughout their native range. …
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Rainbow Trout (Oncorhynchus mykiss) Summer Habitat Use in Lake Spokane, Washington
… thermal habitat for cold-water fish species. Rainbow Trout are sensitive to changes in their habitat and prefer water temperatures < 20 °C and DO levels ≥ 5.0 mg/L. The overarching goal of this study is to document Rainbow Trout movements in an environment that experiences oxygen stress and …
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Isolation and Characterization of Enolase From Rainbow Trout (Salmo Gairdnerii Gairdnerii)
Made available in DSpace on 2014-12-09T17:35:31Z (GMT). No. of bitstreams: 1 6612308.pdf: 2673346 bytes, checksum: f02b5d4abf6c17a8dcd33783edcba03f (MD5) Previous issue date: 1966
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Early pathogenesis of Yersinia ruckeri infections in rainbow trout (Oncorhynchus mykiss, Walbaum)
… in other fish species, salmonids and especially rainbow trout are most susceptible to ERM. Vaccination of fish with a commercial Y. ruckeri bacterin provides good levels of protection, however, disease outbreaks do occur from time to time. The understanding of how this pathogen causes disease is …
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Treatment of Rainbow Trout <i>(Oncorhynchus mykiss)</i> Raceway Effluent Using Baffled Sedimentation and Artificial Substrates and Characterization of Nutrient Leaching Rates from Settled Rainbow Trout (Oncorhynchus mykiss) Sludge
Treatment of Rainbow Trout (Oncorhynchus mykiss) Raceway Effluent Using Baffled Sedimentation and Artificial Substrates. The treatment performance of a 6 m wide by 67 m long by 0.8 m deep, baffled sedimentation basin receiving rainbow trout <i>(Oncorhynchus mykiss)</i> raceway effluent was …
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An investigation of early radiation damage in exposed eye-lenses of rainbow trout
… effects of low-energy X-rays on the lenses of rainbow trout. Lenses were cultured and irradiated to doses up to 2.210 Gy with low-energy X-rays of 40 kV. Laser focal analysis was used to track changes in focal lengths across the lenses post-irradiation. The purpose of this study was to …
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