Index Catalog // ScholarsArchive@OSU

Early self-sorting behavior in Chinook salmon is correlated with variation in growth, behavior and morphology later in life.

Creator:: Unrein, Julia R.
Abstract:: Juvenile Chinook salmon (Oncorhynchus tshawytscha) exhibit an array of life history tactics in Oregon's Willamette River Basin, yet we do not know to what extent it is driven by phenotypic plasticity or whether it is predetermined and how conditions in the early rearing environment may affect phenotype expression. We have...
Resource Type:: Masters Thesis
Full Text:: months post-swim up across three brood years (BY). The surface phenotype exhibits a shorter head and

Distribution and movements of Chinook salmon, Oncorhynchus tshawytscha, returning to the Yukon River basin

Creator:: Eiler, John H.
Abstract:: Chinook salmon, Oncorhynchus tshawytscha, returning to the Yukon River basin and other large river systems in western Alaska have declined dramatically since the late 1990s. This continuing trend has raised concerns over the future status of the returns, and severely impacted commercial and subsistence fisheries within the drainage. Management is...
Resource Type:: Dissertation
Full Text:: patterns exhibited by returning salmon provide a number of insights into the status of the run. Since

Influences of environmental acidification on salmonid reproduction

Creator:: Weiner, Gary S.
Abstract:: Reproduction of salmonid fishes in acidic water was studied using the rainbow trout (Salmo gairdneri). Adult trout were exposed to various levels of hydrogen ion (pH levels 4.5, 5.0, 5.5, and control [6.5 to 7.1]) during the final 6 weeks of reproductive maturation. Reduced survival rates of the progeny of...
Resource Type:: Masters Thesis
Full Text:: Collins, Colorado) and anti-17a-hydroxy-208- dihydroprogesterone was provided by Dr. A. P. Scott

Sex steroids, gonadotropins, and effects on the immune response in maturing spring Chinook salmon (Oncorhynchus tshawytscha)

Creator:: Slater, Caleb H.
Resource Type:: Masters Thesis
Full Text:: final maturation in vitro in a large number of teleosts (see review by Scott and Canario, 1987) and

Endocrine regulation of final oocyte maturation and sex differentiation in salmonids

Creator:: Fitzpatrick, Martin S.
Abstract:: Sexual maturation and sex differentiation comprise facets of a common theme: reproduction. The endocrine system regulates many of the critical physiological processes necessary for reproduction and offers a framework within which technologies can be developed for controlling sexual maturation and sex differentiation. The studies described in this thesis were undertaken...
Resource Type:: Dissertation
Full Text:: system (Goetz 1983), is accompanied by dynamic changes in the plasma levels of steroids (Scott et a

Chemodetection of threatening chemical stimuli by juvenile coho salmon (Oncorhynchus kisutch)

Creator:: Stone, Steven L.
Resource Type:: Masters Thesis
Full Text:: chemical stimuli was assessed using a two-choice Y-maze. It was hypothesized that juvenile salmon would

The effects of hormones on development of embryonic and post embryonic salmonids, and hormone metabolism during these stages

Creator:: Yeoh, Choo-Guan
Abstract:: The importance of hormone reservoirs in mature teleost eggs is unknown. To elucidate the effects of hormones on embryonic development, steelhead trout eggs, Oncorhynchus mykiss, were immersed in either cortisol, testosterone, or thyroxine at two different stages of development. Elevated concentrations of cortisol were detectable in the trout eggs or...
Resource Type:: Masters Thesis
Full Text:: continuum between mother and offspring. In (A. P. Scott, J. P. Sumpter, D. E. Kime, and M. S. Rolfe, Eds

Effects of stress on the reproductive performance and physiology of rainbow trout (Oncorhynchus mykiss)

Creator:: Contreras Sánches, Wilfrido M.
Abstract:: The environment under which fish are maintained as broodstock before reproduction is often stressful; however, the impact of stress on broodstock and gamete quality is not well known. We investigated the effects of stress over the final stages (i.e. the 3 months preceding ovulation) of sexual maturation of female rainbow...
Resource Type:: Masters Thesis
Full Text:: administered over the period of early vitellogenesis (one and a half months), late vitellogenesis-final

Sexual differentiation and steroid-induced sex inversion in Nile tilapia (Oreochromis niloticus) : 1. Characterization of a gonadal androgen receptor : 2. Masculinization by immersion in methyldihydrotestosterone

Creator:: Gale, William L.
Resource Type:: Masters Thesis
Full Text:: Steroid-Induced Sex Inversion in Nile Tilapia (Oreochromis niloticus): 1. Characterization of a Gonadal

Ecological influence of bacterial kidney disease on juvenile spring chinook salmon : effects on predator avoidance ability, smoltification, and physiological responses to stress

Creator:: Mesa, Matthew G.
Abstract:: Juvenile chinook salmon (Oncorhynchus tshawytscha) were experimentally infected with Renibacterium salmoninarum (Rs), the causative agent of bacterial kidney disease (BKD), to investigate the effects of BKD on three aspects of juvenile salmonid performance: (1) predator avoidance ability; (2) smoltification; and (3) physiological responses to stress. For these experiments, fish with...
Resource Type:: Dissertation
Full Text:: -challenged fish were eaten in significantly greater numbers than controls by nearly two to one. A

ScholarsArchive@OSU

Early self-sorting behavior in Chinook salmon is correlated with variation in growth, behavior and morphology later in life.

Distribution and movements of Chinook salmon, Oncorhynchus tshawytscha, returning to the Yukon River basin

Influences of environmental acidification on salmonid reproduction

Sex steroids, gonadotropins, and effects on the immune response in maturing spring Chinook salmon (Oncorhynchus tshawytscha)

Endocrine regulation of final oocyte maturation and sex differentiation in salmonids

Chemodetection of threatening chemical stimuli by juvenile coho salmon (Oncorhynchus kisutch)

The effects of hormones on development of embryonic and post embryonic salmonids, and hormone metabolism during these stages

Effects of stress on the reproductive performance and physiology of rainbow trout (Oncorhynchus mykiss)

Sexual differentiation and steroid-induced sex inversion in Nile tilapia (Oreochromis niloticus) : 1. Characterization of a gonadal androgen receptor : 2. Masculinization by immersion in methyldihydrotestosterone

Ecological influence of bacterial kidney disease on juvenile spring chinook salmon : effects on predator avoidance ability, smoltification, and physiological responses to stress

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