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Showing 1 to 17 of 17 for “"Oncorhynchus tshawytscha"”.
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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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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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A Nano-Scale Chemical and Structural Characterization of Chinook Salmon (Oncorhynchus tshawytscha) Otoliths Using a FIB and HRTEM
… 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 transmission …
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The host-pathogen interactions of Chinook Salmon (Oncorhynchus tshawytscha) and the aquatic rhabdoviral pathogen infectious hematopoietic necrosis virus
Infectious hematopoietic necrosis virus (IHNV) is an aquatic rhabdovirus that causes acute disease in Pacific salmon and trout populations in aquaculture facilities and freshwater conservation hatcheries across the northern hemisphere. While disease occurs primarily in juvenile fish, assessment of …
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Examining striped bass (Morone saxatilis) predation on hatchery raised Chinook salmon (Oncorhynchus tshawytscha) using dual frequency identification sonar
… 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 Mare Island …
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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
Aquaculture is a rapidly expanding industry that has contributed substantially to world-wide food production. Salmon culture constitutes an important part of aquaculture industry. The production of farmed salmon in British Columbia reached 20,000 metric tons (mt) in 1991 and 1992 and ispredicted to …
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Inbreeding depression and segregation distortion in Chinook salmon: Conservation implications of genetic load
… 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 was shown to take …
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Changes in the long-term distribution of commercially caught Cowichan chinook
… Columbia (BC), Canada stock of Chinook Salmon (Oncorhynchus tshawytscha) is used federally in Canada, as an escapement indicator of the Lower Georgia Strait (BC) Chinook and as such is important both locally and internationally as part of the Pacific Salmon Treaty. The study examines the changes …
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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
… 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 outmigration, late fall …
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Advances in the reconstruction of temperature history, physiology and paleoenvironmental change : evidence from light stable isotope chemistry
… isotope values to determine chinook salmon (Oncorhynchus tshawytscha) seasonal and ontogenetic migration in Lake Ontario and its tributaries. Lastly, high-resolution stable hydrogen and carbon isotope values of chitin derived from Mexican free-tailed bat (Tadarida brasiliensis) guano are …
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Post-translational modifications of SEL24K from salmon eggs and ZPA from Xenopus laevis eggs
… lectin SEL24K from the Chinook salmon Oncorhynchus tshawytscha was assigned unambiguously based on a multi-enzyme digestion strategy in combination with MALDI-TOF mass spectrometry analysis. The disulfide bond pattern was found to be symmetrical in the tandem repeat sequence of SEL24K. …
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Bacterial Kidney Disease and Its effect on the Salmonid Immune response
… prevalence among juvenile chinook salmon (Oncorhynchus tshawytscha) Immunomodulatory interaction between pathogen and host in BKD is widely reported and merits further investigation. Particularly, the immunological parameters affected and the role of the extracellular protein (ECP) of R. …
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Understanding the Mechanisms that Determine Feed Conversion Ratio in Chinook Salmon – Physiological and Behavioural Aspects
… 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 and metabolism …
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Food–web implications of reintroducing anadromous salmonids in reservoirs on the North Fork Lewis River, Washington
… River in Washington State. Spring Chinook Salmon Oncorhynchus tshawytscha and Coho Salmon O. kisutch have been observed rearing in several lakes and reservoirs elsewhere, raising the question of the potential for reservoir habitat to contribute to smolt production in the Lewis River. To determine …
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The drivers and implications of spatial and temporal variation in the feeding ecology of juvenile Chinook Salmon
… in feeding ecology of juvenile Chinook Salmon (Oncorhynchus tshawytscha) over multiple spatial and temporal scales using stable isotopes and stomach contents. Significant variation in juvenile Chinook salmon feeding ecology at the individual-level was found to occur off of the west coast of …
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Sexual maturation in sea- and freshwater phases of Pacific salmonids and investigations of reproductive hormone involvement in osmoregulatory adaptation
… 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 during …
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Life History and Bioenergetics of Chinook Salmon in Lake Oahe, South Dakota
… 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 each year …