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Showing 1 to 20 of 45 for “"Japanese quail"”.
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Imunnoresponsiveness in Japanese quail and chickens
… weight and immune responsiveness was studied in Japanese quail and White Plymouth Rock chicken populations. Quail populations consisted of a randombred control (C) line and a line selected for high (HW) 28-day body weight. The chicken populations used were lines selected for high (HW) and low …
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Maternal thyroid hormones in Japanese quail eggs
Thyroid hormone content in eggs varies with the thyroid status of the hen and may influence embryonic development prior to the release of appreciable amounts of thyroid hormones by the embryonic thyroid gland. Methods for the measurement of thyroid hormones in egg yolk were verified by …
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Behavior-genetic analyses in Japanese quail chicks
… factors affecting tonic immobility in young Japanese quail. Both duration and incidence of tonic immobility were measured on each bird at six days and again at 12 days of age. A significant line effect was found at both ages, and rankings of these lines for duration and incidence followed a …
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Fat deposition in relation to sexual maturation of Japanese quail
… and the onset of sexual maturity were studied in Japanese quail (Coturnix coturnix japonica). In an initial experiment, body composition and sexual maturity were examined in response to photoperiodic and hormonal manipulations. Attempts were made to modify body composition, and thereby age at …
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Effects of embryonic exposure to androgen-active endocrine disrupting chemicals in Japanese quail
… impairs development of the bursa of Fabricius in Japanese quail, providing a possible mechanism for EDC-induced immunosuppression. The bursa is a primary immune organ responsible for development of the humoral part of the immune system. We have also demonstrated that the bursa can be resilient to …
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Genetic analyses of reproductive behavior in the domestic fowl and the Japanese quail
… physiology of sexual behavior in chickens and Japanese quail. The populations used in this research included lines that had undergone over 20 generations of divergent selection for high and low mating frequency and the random bred control population from which the selected lines originated. In …
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Morphological and Hematological Responses to Hypoxia During Development in the Japanese quail, Coturnix coturnix
Hypoxic responses in quail development differ depending upon stage, duration and level of oxygen partial pressure of embryo. Incubation was switched to/from 110mmHg partial pressure (hypoxia), to/from 150mmHg (normoxia) during different stages in development, and control was incubated in normoxia …
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The effects of dominance status on reproductive success and offspring quality in Japanese quail
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Adrenal response to chronic and acute water stress in Japanese quail, Coturnix coturnix japonica
Adrenal corticosterone and aldosterone content, body weight changes and serum osmolality were examined during water restriction and water deprivation. Progressive water deprivation resulted in increased serum osmolality and decreased body weight; adrenal aldosterone content did not change. Adrenal …
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Comparative thyroid function in developing and adult precocial Japanese quail and altricial Ring doves
I compared Japanese quail Coturnix japonica, and Ring doves Streptopelia risoria, in the development of thyrotropin (TSH) influence on thyroid hormone (TH) content in the thyroid gland (TG) and the serum, and on TG-cAMP content. In embryos, pituitary gland (PG)-TSH content was measured by an avian …
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The effects of different iodine availabilities on thyroid function during development in Japanese quail
… day incubation period) and 1 day old chicks of Japanese quail (Coturnix japonica) were used to study the effects of different egg iodine (I) availabilities on thyroid function during development. Low (≤50 μgI/kg feed in the maternal diet) and high (1200 μgl/kg feed) I availability were compared …
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The effects of induced hypothyroidism on the glucocorticoid stress response in Japanese quail (Coturnix japonica)
… on the glucocorticoid stress response in Japanese quail, a potential interaction between the hypothalamic-pituitary thyroid (HPT) and hypothalamic-pituitary adrenal (HPA) axes of control. I used the thyroid inhibitor ammonium perchlorate (AP) for 2 weeks and 5 weeks to induce two states of …
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Effects of exogenous and endogenous factors on appetite regulation in broiler chicks and Japanese quail
… intracerebroventricularly (ICV) or IP in Japanese quail (Coturnix japonica), resulted in a decrease in food intake for 3 hours post-injection. There was an increase in c-Fos immunoreactivity within the ARC as well as the dorsomedial nucleus (DMN) in quail ICV injected with OXM. In …
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The role of body composition in the onset of lay of Japanese quail (Coturnix coturnix japonica)
… and restricted feeding on body composition of Japanese quail at the onset of lay. The first experiment utilized five isocaloric diets containing either 26%, 24%, 20%, 16%, or 14% crude protein. Each diet was fed to three groups of quail: one group was fed <i>ad libitum</i>, a second group was …
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Androgen aromatization and cytosol estradiol-receptors in the mediation of masculine sexual behavior in Japanese quail
… of masculine sexual behavior was examined in Japanese quail selected bi-directionally for adult mating frequency. Experiments were conducted with brain tissues from functionally castrated, High (HM) and Low Mating (LM) line quail to compare (1) the in vivo aromatization of ³H-testosterone and …
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Chromosomal localization of a proinsulin transgene inserted with a transposon-based vector into Japanese quail, Coturnix coturnix
… method of detecting stable DNA insertion into Japanese quail and provide a method for gene location on avian chromosomes. This research resulted in the development of a different method of obtaining chromosome spreads in Japanese quail, the establishment of primed in situ hybridization as a …
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Hepatic 5'deiodinase activity of Japanese quail using reverse-T2 as substrate: assay validation, characterization, and developmental studies
… 5'deiodinase (5'0) assay was validated for adult Japanese quail, by defining conditions under which activity is proportional to enzyme (protein) concentration and is linear with incubation time. Activity was measured as the release of 1(125) from labeled rT3. Using validated assay conditions we …
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