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Showing 1 to 20 of 46 for “"Chinook"”.
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Life History and Bioenergetics of Chinook Salmon in Lake Oahe, South Dakota
The food habits and population dynamics of chinook salmon Oncorhynchus tshawytscha were investigated from 1993 through 1995 and was combined with information on energetics and growth from previous studies to determine the trophic interactions of chinook salmon in Lake Oahe, South Dakota. During …
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Inbreeding depression and segregation distortion in Chinook salmon: Conservation implications of genetic load
… parents to study the effects of ID in Chinook salmon ( Oncorhynchus tshawytscha ) at an extreme level of inbreeding. High levels of ID were found after a single generation of self-crossing, resulting in substantial fitness losses. The potential to purge genetic load from a population …
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Jacking in Chinook salmon (Oncorhynchus tshawytscha ): environmental and genotypic effects on life history strategy
Jacking in Chinook salmon (Oncorhynchus tshawytscha), is defined as precocious sexual maturation of males after at least 1 year in sea water, and occurring 1 year prior to females of the same cohort. Substantial evidence supports genetic, environmental, and genetic by environmental effects on …
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Induction of Apoptosis and Necrosis By Infectious Pancreatic Necrosis Virus in Chinook Salmon Embryo Cells
Viruses are associated with the induction of apoptosis or necrosis in the cells they infect. Infectious Pancreatic Necrosis Virus (IPNV) is a birnavirus that has been shown to cause severe necrosis in pancreatic, intestinal epithelial, kidney, and liver tissues in infected salmonid fish, but no …
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Understanding the Mechanisms that Determine Feed Conversion Ratio in Chinook Salmon – Physiological and Behavioural Aspects
… that influence individual FCR variation in Chinook salmon (Oncorhynchus tshawytscha). Feed efficient and inefficient Chinook salmon, in freshwater and saltwater, were identified using ballotini beads and X-radiography to determine individual feed intake. Comparisons of physiological traits …
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Resource use and life history patterns of juvenile Coho and Chinook salmon in an Alaskan estuary
… resource partitioning between juvenile Coho and Chinook salmon, (2) determine which age classes use the estuary and for how long, (3) examine the tidal movement of juvenile salmon, and (4) utilize a social network analysis to explore the social structure of juvenile Coho Salmon. Coho and Chinook …
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Genetic, environmental, and physiological factors involved in the precocious sexual maturation of chinook salmon (Oncorhynchus tshawytscha)
Male chinook salmon (Oncorhynchus tshawytscha), that mature sexually one year prior to females and after at least one summer in sea water, are known as jacks. A breeding experiment to test for genetic and environmental (temperature at early rearing) effects on the incidence of jacking in chinook …
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Techniques of RNA Isolation and Characterization in Infectious Pancreatic Necrosis Virus-Infected Chinook Salmon Embryo Cells
Infectious pancreatic necrosis virus (IPNV) causes the most lethal disease in young salmonid fishes with mortality rates of equal or higher than ninety-five percent. The survival of the adult fish has been the main cause of this virus's proliferation around the world, making it the most …
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The host-pathogen interactions of Chinook Salmon (Oncorhynchus tshawytscha) and the aquatic rhabdoviral pathogen infectious hematopoietic necrosis virus
… high prevalence of IHNV infection in adult CRB Chinook salmon in the absence of disease in juvenile fish. Here, we evaluated field occurrence patterns of IHNV prevalence in Chinook salmon populations and conducted controlled virus exposures to characterize intraspecific variation in IHNV …
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A Nano-Scale Chemical and Structural Characterization of Chinook Salmon (Oncorhynchus tshawytscha) Otoliths Using a FIB and HRTEM
… sections from the post-hatch and core regions of Chinook salmon (Oncorhynchus tshawytscha) otoliths. The nano-scale chemistry and structure of these regions was characterized in thin section using scanning electron microscopy (SEM) in conjunction with cathodoluminescence (CL) and high resolution …
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Examining striped bass (Morone saxatilis) predation on hatchery raised Chinook salmon (Oncorhynchus tshawytscha) using dual frequency identification sonar
… 29 million 4 fall run Central Valley Chinook salmon (Oncorhynchus tshawytscha) per season for stock enhancement. From April through June, fish are acclimated in net-pens prior to release at one of three sites: the Carquinez Strait at Conoco Phillips (CP), the mouth of the Napa River at …
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Movement and survival of chinook salmon fry stocked in a stream with natural barriers to anadromous fish migration
… growth, and survival of hatchery incubated chinook salmon (<i>Oncorhynchus tshavvytscha</i>) fry stocked above a barrier falls on the Indian River, Chichagof Island, southeast Alaska. The Indian River contained significant potential salmonid rearing habitat, but was devoid of anadromous fish …
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Sexual maturation in sea- and freshwater phases of Pacific salmonids and investigations of reproductive hormone involvement in osmoregulatory adaptation
… of sexual maturation in wild coastal salmon, chinook, Oncorhynchus tshawytscha, and steelhead, O. mykiss, were documented for stocks spawning in two similar river systems on the west coast of Vancouver Island, British Columbia, Canada. Chinook were blood-sampled and sacrificed at intervals …
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In vitro effects of different innate-immune stimulants on Chinook salmon embryo cell line (CHSE-214): transcriptional and translational studies
… RIG-I and ISG25 mRNA was assessed by qPCR in Chinook salmon cell line (CHSE-214) before and after treatment with potential inducers: ß-hydroxy-ß-methylbutyrate, 4-phenylbutyrate, 1,25(OH)2 D3, omega-3 and omega-3 ethyl ester from fish oil and cod liver oil. Cathelicidin was found to be …
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An Analysis of Juvenile Chinook Salmon Outmigration Speed and Survival in Response to Habitat Features: Sacramento River from Knights Landing to Sacramento, California
<p>Outmigration is an important life stage for Chinook salmon (<em>Oncorhynchus tshawytscha</em>) survival in the Sacramento River, and yet our understanding of their behavior and needs during this time is limited. To gain a better understanding of their survival and movement rates during …
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Passage Route Survival and Behavior of Juvenile Salmon at Priest Rapids Dam, Columbia River, WA
… collect and safely pass juvenile steelhead and Chinook salmon. The bypass collected 47% of the monitored steelhead and 38% of the monitored yearling Chinook salmon. Analysis of route choice identified forebay temperature, powerhouse discharge, spillway discharge and forebay approach patterns as …
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Lepeophtheirus salmonis, parasitizing three species of pacific salmon (Oncorhynchus spp.): host variations in load, morphology, fecundity, and genetics of the salmon louse
… of salmonids (p = 0.231). Lice that infected chinook salmon (n= 48) were smaller in total body length (p < 0.001), cephalothorax length (p < 0.001), and cephalothorax width (p < 0.001) when compared to lice that infected coho salmon (n = 44) or pink salmon (n=45). Lice that infected coho and …
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HPLC analysis of Romet-30 in chinook salmon (Oncorhynchus tshawytscha): wash-out time, tissue distribution in muscle and liver tissues, and metabolism of sulfadimethoxine
… for determination of Romet-30®residue levels in Chinook salmon muscle and liver tissues. By using ion-pairing reagent TBAH and granular sodium sulfate anhydrous during extraction, the extraction recoveries averaged 66%, 78% and 83% for OMP, SDM and N4-Ac-SDM, respectively, in muscle tissue; 61% …
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