Publications
| Title | Abstract | Year Filter | PMID(sorted descending) Filter |
|---|
| replication and transmission of influenza viruses in japanese quail. | quail have emerged as a potential intermediate host in the spread of avian influenza a viruses in poultry in hong kong. to better understand this possible role, we tested the replication and transmission in quail of influenza a viruses of all 15 ha subtypes. quail supported the replication of at least 14 subtypes. influenza a viruses replicated predominantly in the respiratory tract. transmission experiments suggested that perpetuation of avian influenza viruses in quail requires adaptation. swi ... | 2003 | 12788625 |
| dietary vitamin c and folic acid supplementation ameliorates the detrimental effects of heat stress in japanese quail. | we evaluated the effects of vitamin c (l-ascorbic acid) and folic acid supplementation on performance, carcass characteristics and concentrations of the oxidative stress markers [malondialdehyde (mda), homocysteine], adrenocorticotropic hormone (acth), vitamins c, e, a, b-12 and folic acid, and mineral status in broiler japanese quail (coturnix coturnix japonica) exposed to high ambient temperature (34 degrees c, 8 h/d, 0900-1700 h). the birds (n = 150; 10-d-old) kept at 34 degrees c were fed a ... | 2003 | 12771333 |
| histological preparation of developing vestibular otoconia for scanning electron microscopy. | the unique nature of vestibular otoconia as calcium carbonate biominerals makes them particularly susceptible to chemical deformation during histological processing. we fixed and stored otoconia from all three otolith endorgans of embryonic, hatchling and adult japanese quail in glutaraldehyde containing either phosphate or non-phosphate buffers for varying lengths of time and processed them for scanning electron microscopy. otoconia from all age groups and otolith endorgans processed in 0.1 m p ... | 2003 | 12763239 |
| long-term supplementation of various dietary lipids alters bone mineral content, mechanical properties and histological characteristics of japanese quail. | the purpose of this study was to investigate the effects of long-term supplementation of fat in the diets on the fatty acid composition, chemical, mechanical, and histological properties of tibial bone. month-old male japanese quail were fed a basal diet containing either soybean oil (sbo), hydrogenated soybean oil (hsbo), chicken fat (cf), or menhaden fish oil (fo) at 50 g/kg of the diet and maintained on these diets for 7 mo. lipid treatments did not affect body weight, food intake, tibial len ... | 2003 | 12762407 |
| temporal and spatial localization of proteoglycan decorin transcripts during the progression of cholesterol-induced atherosclerosis in japanese quail. | the temporal and spatial distribution of decorin transcripts, endothelial cells, and smooth muscle actin-producing cells were determined during the progression of atherosclerosis in the dorsal aortas of japanese quail selected for cholesterol-induced atherosclerosis. the quail were placed on either a control diet or a diet containing 0.5% added cholesterol at approximately 16 weeks of age. dorsal aortas were collected at 2-week intervals for 18 weeks after initiating cholesterol feeding. in situ ... | 2003 | 12745673 |
| retinoids, lrat and reh activities in eggs of japanese quail following maternal and in ovo exposures to 3,3',4,4'-tetrachlorobiphenyl. | environmental monitoring for the effects of organochlorine contaminants has identified changes in egg yolk retinoid concentrations, however underlying mechanisms are unknown. breeding female japanese quail, coturnix coturnix japonica, received 3 bimonthly injections of a low dose (5 microg/g) of the coplanar polychlorinated biphenyl (pcb) 3,3',4,4'-tetrachlorobiphenyl. no overt maternal toxicity or embryotoxicity was detected. for the exposed females, oocytes (yolk deposition nearly completed) a ... | 2016 | 12739853 |
| dynamics of relative growth rate in japanese quail lines divergently selected for growth and their control. | this study was undertaken to test the hypothesis that relative growth is the same in japanese quail divergently selected for 4-week body weight for 30 generations, and their control. relative growth rate is the increase in body weight per unit of body weight per unit of time, and it represents the efficiency of an animal as a producer of new body mass material. the maximum relative growth rate of the divergent and control lines were observed during the first week. selection for high 4-week body ... | 2003 | 12739845 |
| extinction of conditioned sexual responses in male japanese quail (coturnix japonica): role of species-typical cues. | the authors examined how a conditioned stimulus (cs) that included species-typical cues affected the acquisition and extinction of conditioned sexual responses in male quail (coturnix japonica). some subjects were conditioned with a cs that supported sexual responses and included a taxidermic head of a female quail. others were conditioned with a similar cs that lacked species-typical cues. pairing the css with access to live females increased cs-directed behavior, with the head cs eliciting sig ... | 2003 | 12735367 |
| phenotypic flexibility of structure and function of the digestive system of japanese quail. | organisms adjust their phenotype to fluctuating conditions of the environment and to changing internal demands. we report flexible responses of the gizzard and the small intestine of japanese quail to a high-fibre diet. switching from a standard diet to a high-fibre diet results in a highly significant increase in gizzard size, intestine length, mucosal surface, thickness of the intestinal muscular layer and vascularization of the mucosa. after diet switching, increased or decreased gizzard size ... | 2003 | 12728010 |
| cloning of the genes for the pituitary glycoprotein hormone alpha and follicle-stimulating hormone beta subunits in the japanese crested ibis, nipponia nippon. | we have isolated a part of the gene for the pituitary glycoprotein hormone common alpha subunit (pghalpha) and the whole gene for the follicle-stimulating hormone beta subunit (fshbeta) in the japanese crested ibis (nipponia nippon), a critically endangered bird species in east asia. the nucleotide sequence of a part of the pghalpha gene (5026 bp) contained three exons holding the whole coding and 3' untranslated regions, but lacked a 5' untranslated region. its exon-intron structure was similar ... | 2003 | 12719648 |
| melatonin enhances cellular and humoral immune responses in the japanese quail (coturnix coturnix japonica) via an opiatergic mechanism. | it is known that melatonin has important immunomodulatory properties in the japanese quail. however, the mechanism of melatonin action on the immune system is not clearly understood in avian species. in mammals, the immunostimulatory properties of melatonin are mediated by the release of opioid peptides from activated t-lymphocytes. the present study was performed to determine if these same melatonin-induced opioids (mio) are involved with the immunoenhancing effects of melatonin in quail. three ... | 2003 | 12714007 |
| cellulitis in japanese quail (coturnix coturnix japonica). | a case of cellulitis was observed in japanese quail (coturnix coturnix japonica) reared for commercial meat production. this condition in japanese quail has not been reported in the literature. this incident was the first, and to date only, occurrence of cellulitis in this processing plant. the cellulitis lesions were localized to the subcutis overlying the breast and inner thigh. carcasses of processed birds and live birds from the affected farm were presented to the poultry diagnostic and rese ... | 2003 | 12713180 |
| effect of long-term divergent selection on growth characteristics in japanese quail. | the current study was undertaken to examine the effect of long-term selection for 4-wk bw on growth characteristics in divergent lines of japanese quail and their control. growth rate was significantly higher in males than females in all the lines. there was a significant increase in growth rate of the females selected for increased 4-wk bw over the control females, as well as a significant decline in growth rate of males selected for decreased 4-wk bw compared to their control counterparts. it ... | 2003 | 12710471 |
| protein s100 immunoreactivity in glial cells and neurons of the japanese quail brain. | in mammals, sparse data illustrated the neuronal expression of s100 protein in central and peripheral nervous system. similar studies have not been performed in other vertebrate species, in particular in birds. we provide here a detailed description of the distribution of the calcium-binding protein s100 in neuronal and glial elements in the central nervous system of an avian species, the japanese quail (coturnix japonica) largely used for neuroanatomical and functional studies. the distribution ... | 2003 | 12706207 |
| maternal dietary lipids alter bone chemical composition, mechanical properties, and histological characteristics of progeny of japanese quail. | this study evaluated the effects of maternal dietary lipids on chemical components and mechanical and histological properties of tibia in progeny of japanese quail fed different dietary lipids. laying hens were fed a basal diet containing either soybean oil (sbo), hydrogenated soybean oil (hsbo), chicken fat (cf), or menhaden fish oil (fo) at 50 g/kg of the diet. the various maternal dietary lipid treatments did not affect growth of progeny at any developmental stage. there were no differences i ... | 2003 | 12705408 |
| cloning of a partial cdna for japanese quail thyroid-stimulating hormone and effects of methimazole on the thyroid and reproductive axes. | the purposes of this study were to develop a probe for the detection of thyroid-stimulating hormone (tsh) beta subunit mrna, to validate the usefulness of that probe in measuring tsh, and to use it to investigate the effects of thyroid suppression on tsh and the reproductive axis in japanese quail. the objectives of experiment 1 were to isolate and characterize a partial cdna for quail tsh and validate a riboprobe transcribed from this cdna. this riboprobe was then used to assess changes in tshb ... | 2003 | 12705397 |
| presence and developmental regulation of serotonin n-acetyltransferase transcripts in oocytes and early quail embryos (coturnix coturnix japonica). | by rt-pcr two transcripts for arylalkylamine n-acetyltransferase (aa-nat; serotonin n-acetyltransferase; ec 2.3.1.87), the key enzyme in melatonin synthesis, were found, for the first time, in the oocytes and blastoderms from freshly laid eggs (323- and 238-bp rt-pcr products), and one (238-bp product) in the pineal gland of japanese quail (coturnix coturnix japonica). the two products differed by an intron of 85-bp present in the 323-bp band and absent from the 238-bp band. the identity of the ... | 2003 | 12704723 |
| vascular endothelial growth factor: a regulator of vascular morphogenesis in the japanese quail embryo. | experiments in mouse embryos indicate that a critical level of vegf is required for normal vascular development, as mice lacking a single vegf allele die at midgestation. thus vegf concentration may be a determinant of the size and location of major blood vessels during formation of the primary capillary plexus. ectopic vegf delivery was used to examine the effect of vegf concentration on early vascular patterning in the quail embryo. vegf was delivered by implanting vegf-soaked heparin chromato ... | 2003 | 12704698 |
| evaluation of a collagen patch as a method of enhancing ventriculotomy healing in japanese quail (coturnix coturnix japonica). | to assess the ability of a porcine submucosal collagen patch to enhance ventriculotomy healing in quail. | 2011 | 12692754 |
| effect of in ovo leptin administration on the development of japanese quail. | potential changes in the activity of endocrine axes related to growth as a result of leptin administration during embryonic development of birds were evaluated in the japanese quail as a model bird with fast growth and development. on day 5 of incubation, 0.1 microg or 1 microg of recombinant mice leptin in 50 microl of phosphate buffered saline were injected into the albumen of eggs. animals from each group were killed by decapitation on day 0, 2, 5, 7, 14, 21, 28, 35, 42, 49 and 56 of life. pl ... | 2003 | 12678663 |
| distribution and origin of steroid hormones in the yolk of japanese quail eggs (coturnix coturnix japonica). | the yolk of avian eggs contains steroid hormones, which may influence the development and behaviour of hatched birds. the aim of the present study was to investigate the concentration as well as the distribution of various gonadal steroids in the yolk spheres of quail eggs. steroid concentrations of dissected yolk layers were analysed after alcoholic extraction using enzyme immunoassays (eias) for progesterone, androstenedione and testosterone. to monitor the uptake of testosterone into the yolk ... | 2003 | 12677460 |
| effect of different dietary levels of yucca schidigera powder on the performance, blood parameters and egg yolk cholesterol of laying quails. | a total of 135 laying quails (coturnix coturnix japonica), 9 weeks old, were divided into three dietary treatment groups. three replicates were assigned to each treatment group consisting of 15 birds per cage. the diet was supplemented with 0, 100 and 200 ppm yucca schidigera powder and given ad libitum to the quails for a period of 14 weeks. body weight, egg production, feed consumption and feed efficiency were not different due to dietary treatments among the groups. increased egg weight was d ... | 2003 | 12650503 |
| competitive interactions of chlorinated phenol compounds with 3,3',5-triiodothyronine binding to transthyretin: detection of possible thyroid-disrupting chemicals in environmental waste water. | chlorinated phenol compounds, such as the chlorinated derivatives of bisphenol a, have been detected in effluents from paper manufacturing plants. we investigated the effects of bisphenol a, nonylphenol, and their seven chlorinated derivatives on 3,3',5-[(125)i]triiodothyronine ([(125)i]t(3)) binding to purified chicken and bullfrog transthyretin (cttr and bttr) and to the ligand-binding domains of chicken and bullfrog thyroid hormone receptor beta (ctr lbd and btr lbd). the concentrations at wh ... | 2003 | 12649043 |
| expression of perivitelline membrane glycoprotein zp1 in the liver of japanese quail (coturnix japonica) after in vivo treatment with diethylstilbestrol. | avian perivitelline membrane, an oocyte extracellular matrix homologous to the zona pellucida in mammals or chorion in fish, is composed of at least two glycoproteins. previous studies have indicated that one of the components, a glycoprotein homologous to mammalian zpc, is produced in the granulosa cells of the developing follicles of quail ovary on stimulation with testosterone. however, little is known about the molecular biology of the other component of the avian perivitelline membrane, zp1 ... | 2003 | 12648530 |
| complete nucleotide sequence of the coturnix chinensis (blue-breasted quail) mitochondrial genome and a phylogenetic analysis with related species. | coturnix chinensis (blue-breasted quail) has been classically grouped in galliformes phasianidae coturnix, based on morphologic features and biochemical evidence. since the blue-breasted quail has the smallest body size among the species of galliformes, in addition to a short generation time and an excellent reproductive performance, it is a possible model fowl for breeding and physiological studies of the coturnix japonica (japanese quail) and gallus gallus domesticus (chicken), which are class ... | 2002 | 12642645 |
| identification of cgnrh-ii in the median eminence of japanese quail (coturnix coturnix japonica). | in a previous paper, we described the presence of cgnrh-ii in the quail (coturnix coturnix japonica) and chicken (gallus gallus) median eminence using highly specific antibodies directed against a polypeptide corresponding to the c-terminal portion of cgnrh-ii (van gils et al., 1993). this finding remained very controversial, since no other study, with any other antibody, had ever reported the presence of cgnrh-ii immunoreactive fibers in the median eminence of birds. in this study, the cgnrh-ii ... | 2003 | 12620246 |
| effect of selection for growth on onset of sexual maturity in randombred and growth-selected lines of japanese quail. | an experiment was conducted to determine the effect of selection for growth (bw) on the onset of reproduction (first egg) in japanese quail hens from growth-selected (hw) and randombred (r1) lines. the hw line had undergone over 40 generations of selection for increased 4-wk bw and was originally developed from the r1 line. data were collected over two consecutive hatches and summarized by hatch and within lines. body weight at 35 d of age was positively correlated with bw at sexual maturity (fi ... | 2003 | 12619793 |
| asparagine-linked oligosaccharide-independent secretion of egg envelope glycoprotein zpc of the japanese quail (coturnix japonica). | in avian species, a glycoprotein homologous to mammalian zpc is synthesized in the granulosa cells of developing follicles. we have previously reported that the newly synthesized zpc (prozpc) in the granulosa cells is cleaved at the consensus furin cleavage site to generate mature zpc prior to secretion. in the present study, we examined the role of asparagine (n)-linked oligosaccharides in the proteolytic processing of prozpc and the subsequent secretion of zpc by using site-directed mutagenesi ... | 2003 | 12600672 |
| reproductive impairment in japanese quail (coturnix japonica) after in ovo exposure to o,p'-ddt. | we have previously described various effects in adult japanese quail consequent on treatment with oestrogenic compounds in ovo. in the present study, the environmental contaminant o,p'-ddt [1-(2-chlorophenyl)-1-(4-chlorophenyl)-2,2,2-trichloroethane] was administered to quail eggs to further evaluate test endpoints for oestrogenic effects related to reproduction in the japanese quail. exposure to 2 mg o,p'-ddt/egg (150 micro g/g egg) resulted in impaired sexual behaviour, reduced cloacal gland a ... | 2003 | 12590364 |
| genetic characterization of stress responsiveness in japanese quail. 2. analyses of maternal effects, additive sex linkage effects, heterosis, and heritability by diallel crosses. | diallel crosses were used to investigate the genetic inheritance of stress responsiveness through examination of population effects in progeny of randombred (rb) quail and quail selected for reduced (low stress, ls) or exaggerated (high stress, hs) plasma corticosterone (cs) response to brief immobilization. the three genotypes were crossed in a 3 x 3 factorial arrangement of treatments that allowed all possible crosses between rb, ls, and hs males with rb, ls, and hs females. the nine crosses p ... | 2003 | 12580241 |
| genetic characterization of stress responsiveness in japanese quail. 1. analyses of line effects and combining abilities by diallel crosses. | the inheritance of stress responsiveness (line effects and combining abilities) was phenotypically studied in progeny from diallel crosses of randombred (rb) quail and quail selected for exaggerated (high stress, hs) or reduced (low stress, ls) plasma corticosterone (cs) response to brief immobilization. the three genotypes were crossed in a 3 x 3 factorial arrangement of treatments that allowed all possible crosses between rb, ls, and hs males with rb, ls, and hs females. the nine crosses produ ... | 2003 | 12580240 |
| deuterium-free water (1h2o) in complex life-support systems of long-term space missions. | heavy water containing deuterium displays toxic property. it is stated that any quantity of a heavy isotope of hydrogen--deuterium--is undesirable to animals and plants. it was earlier shown by us that physical-chemical life support systems on board the "mir" station fractionate (change) isotopes of hydrogen, oxygen and carbon. therefore, the problem of regenerative systems in habitable space objects should include removal, from water, of a heavy stable isotope of hydrogen--deuterium. in this ar ... | 2003 | 12575722 |
| anatomical relationships between aromatase-immunoreactive neurons and nitric oxide synthase as evidenced by nos immunohistochemistry or nadph diaphorase histochemistry in the quail forebrain. | in japanese quail (coturnix japonica), previous studies indicated that the distribution of reduced nicotinamide dinucleotide phosphate (nadph) diaphorase overlaps with steroid-sensitive areas that contain dense populations of aromatase-immunoreactive (aro-ir) cells. we investigated here the anatomical relationships between aromatase (aro) and nitric oxide synthase (nos)-containing cells that were visualized both by nos-immunohistochemistry and nadph-histochemistry. the distribution of aro-ir and ... | 2003 | 12573458 |
| [morphological changes in the adrenal gland of japanese quail chicken hatched out in microgravity]. | the paper presents results of studying effects of spaceflight factors on the adrenal structure in japanese quail hatchlings (coturnix coturnix japonica) incubated and kept alive 4 to 5 days aboard the space station mir. in comparison with the ground controls, cortical cells in the adrenals of space hatchlings contained copious fat drops, mitochondrias, and significantly dilated cisterns of the endoplasmic reticulum. accumulation of fat drops evidences lowered cholesterol transformation and distu ... | 2002 | 12572121 |
| factorial correspondence analysis of fear-related behaviour traits in japanese quail. | factorial correspondence analysis was performed on 341 quails from a f2 cross between two lines divergently selected on the duration of tonic immobility over 29 generations. several fear- or stress-related traits were recorded, i.e. tonic immobility duration, number of inductions needed to induce tonic immobility, open-field behaviour (time spent walking, latency before first movement and number of defecations), asymmetry of tibia lengths and corticosterone concentration after restraint stress. ... | 2003 | 12543484 |
| hypothalamic indolamines during embryonic development and effects of steroid exposure. | the serotonin system has been implicated in the modulation of endocrine and behavioral components of reproduction. in this study, we examined endogenous hypothalamic indolamines during sexual differentiation and long-term effects of exogenous steroids during this time. in experiment 1, japanese quail were studied during the last half of embryonic development and early post-hatch. samples were taken at embryonic day 10 (e10), e12, e14, e16, hatch (day 0), and days 3 and 5, post-hatch. hypothalami ... | 2003 | 12535620 |
| cytochrome p450 enzyme activity in five herbivorous, non-passerine bird species. | we examined hepatic cytochrome p450 activity in wild and hand-reared grey partridges (perdix perdix), capercaillies (tetrao urogallus) and ring-necked pheasants (phasianus colchicus), as well as the enzyme activity in a variety of tissues of hand-reared japanese quails (coturnix coturnix japonica) and pigeons (columba livia). post-mortem decrease in hepatic enzyme activity in the grey partridge was measured. hepatic 7-ethoxyresorufin-o-deethylase activity was similar in wild and hand-reared grey ... | 2003 | 12524019 |
| retinoid metabolism (lrat, reh) in the yolk-sac membrane of japanese quail eggs and effects of mono-ortho-pcbs. | retinoids stored in the avian egg are essential for normal development, however, laboratory and field experiments suggest that they are affected by environmental contaminants. lecithin:retinol acyltransferase (lrat) activity was detected in the microsomal fraction of the yolk-sac membrane of the japanese quail at day 6 of development. lrat activity was maximal at ph 7.0 having apparent kinetic parameters of k(m)=1.35 microm and v(max)=0.21 nmol/mg protein/h and was inhibited by the sulfhydryl mo ... | 2003 | 12524014 |
| circadian rhythms of oviposition and feeding activity in japanese quail: effects of cyclic administration of melatonin. | the aim of these experiments was to test the effect of a cyclic administration of melatonin, by mimicking the daily rhythm of hormone levels, on the circadian organization of two distinct functions in quail: oviposition and feeding activity. laying and feeding rhythms under photoperiodic conditions and constant darkness (dd) were investigated. under dd, where the two rhythms were free running, a daily rhythm of melatonin was administered. in ld 14 h:10 h, two different individual profiles of lay ... | 2002 | 12511029 |
| content of retinol and retinyl esters in blood plasma, liver, kidney and reproductive organs of japanese quails. | due to its importance in many physiological processes such as cell proliferation and differentiation, vitamin a plays a key role in reproduction. the present study examines the content and distribution of retinol and retinyl esters in the blood plasma, liver, kidney, ovary and oviduct (infundibulum, magnum, isthmus and uterus) of the laying japanese quail. (1) the results show that the stage of egg laying had no influence on the level of vitamin a (retinol or retinyl esters) in plasma, kidney an ... | 2002 | 12498148 |
| persistence of pregnant mare serum gonadotrophin in plasma of japanese quail (coturnix coturnix japonica). | pregnant mare serum gonadotrophin (pmsg) is currently being used to develop a hormone regime that will stimulate reproductive development in japanese quail (coturnix coturnix japonica). in this study, the persistence of pmsg in quail plasma was examined after a single injection of the hormone (500 iu). plasma concentrations of pmsg increased to a peak 12 h after injection and declined to approximately 50% of peak concentrations 24 h after injection. pregnant mare serum gonadotrophin concentratio ... | 2002 | 12467352 |
| long term dietary supplementation with zeaxanthin reduces photoreceptor death in light-damaged japanese quail. | the purpose of these studies was to evaluate the effects of light damage on japanese quail whose retinal carotenoids had been experimentally manipulated through altered diets. the birds were raised 6 months on a commercial turkey diet (t), on a custom carotenoid-deficient diet (c-) containing 90% less carotenoid than the t diet, or on z+ diet [the c- diet supplemented with natural zeaxanthin (35mgkg(-1) food)]. equal numbers of males and females on each diet were exposed to nine intervals (1hr o ... | 2002 | 12457865 |
| steroid receptor coactivator src-1 exhibits high expression in steroid-sensitive brain areas regulating reproductive behaviors in the quail brain. | the steroid receptor coactivator src-1 modulates ligand-dependent transactivation of several nuclear receptors, including the receptors for sex steroid hormones. reducing the expression of src-1 by injection of specific antisense oligonucleotides markedly inhibits the effects of estrogens of the sexual differentiation of brain and behavior in rats and inhibits the activation of female sexual behavior in adult female rats. src-1 thus appears to be involved in both the development and activation o ... | 2002 | 12457041 |
| analysis of censored survival data in japanese quail divergently selected for growth and their control. | the aim of the current study was to characterize and quantify risk factors involved in juvenile mortality in divergently selected and control lines of japanese quail. survival analysis and cox proportional hazards regression were used to describe mortality in the three experimental lines with hatch weight and posthatch bw evaluated as risk factors. survival function distribution indicated that the proportional mortality was highest in the line selected for high 4-wk bw compared to the low and co ... | 2002 | 12455585 |
| establishment of inbred strains of chicken and japanese quail and their potential as animal models. | we started establishing inbred strains of chicken and japanese quail in 1970. in class aves, full sib mating is highly difficult due to inbreeding depression. in the chicken, we attempted to establish some inbred strains in three breeds, black minorca, white leghorn and fayoumi by fixing all the characters that differentiate individuals homozygously. in this paper, we describe some marker genes and characters fixed in the inbred strains of chicken and japanese quail as well as a calculation of a ... | 2002 | 12451702 |
| plaque assay for avian metapneumovirus using a japanese quail fibrosarcoma cell line (qt-35). | a plaque assay for detecting, isolating and titrating avian pneumoviruses using a japanese quail fibrosarcoma cell line (qt-35) is described. plaques are produced after application of either an agarose or carboxymethyl-cellulose (cmc) overlay onto cell monolayers infected with representative avian metapneumoviruses which belong to subgroup a, b or c. virus plaques can be easily visualized by light microscopy or after staining. the parameters affecting plaque appearance include: cell seeding conc ... | 2003 | 12445932 |
| vitamin e supplementation can alleviate negative effects of heat stress on egg production, egg quality, digestibility of nutrients and egg yolk mineral concentrations of japanese quails. | the aim of this study was to determine if the negative effects of high ambient temperature (34 degrees c) on egg production, egg quality, digestibility of nutrients, and mineral content of egg yolk could be alleviated by dietary vitamin e (dl-alpha-tocopheryl acetate) supplementation in laying japanese quails (coturnix coturnix japanica). japanese quails (n=240; 7-week-old) were divided into eight groups, 30 birds per group. the quails were fed either a basal diet or the basal diet supplemented ... | 2002 | 12443690 |
| melatonin can produce immunoenhancement in japanese quail (coturnix coturnix japonica) without prior immunosuppression. | in recent years, it has been determined that melatonin has important immunostimulatory properties in mammalian and avian species. typically, this immunoenhancement has only been examined in immunosuppressed animals. the effect of melatonin on normal (unsuppressed) immune systems is yet to be evaluated in avian species. an experiment was performed to determine if transient and/or continuous melatonin treatments could enhance immune functions in japanese quail without prior immunosuppression. all ... | 2002 | 12441122 |
| validation of the dlw method in japanese quail at different water fluxes using laser and irms. | in japanese quail (coturnix c. japonica; n = 9), the doubly labeled water (dlw) method ((2)h, (18)o) for estimation of co(2) production (l/day) was validated. to evaluate its sensitivity to water efflux levels (r(h(2))o(e); g/day) and to assumptions of fractional evaporative water loss (x; dimensionless), animals were repeatedly fed a dry pellet diet (average r(h(2))o(e) of 34.8 g/day) or a wet mash diet (95.8 g/day). we simultaneously compared the novel infrared laser spectrometry (ls) with iso ... | 2002 | 12433938 |
| localization of oestrogen receptors in the sensory and motor areas of the spinal cord in japanese quail (coturnix japonica). | in japanese quail, the presence of aromatase (oestrogen synthase) in the dorsal horn of the spinal cord suggests that spinal sensory processes might be controlled by local actions of oestrogens. this is supported by the presence of oestrogen receptors and aromatase in the dorsal horn of the spinal cord in rats, and by the alteration of sensitivity by oestrogens in various mammalian species and also in canaries. we investigated whether oestrogens that are locally produced in the quail spinal cord ... | 2002 | 12421343 |
| effect of melatonin administration on qper2, qper3, and qclock gene expression in the suprachiasmatic nucleus of japanese quail. | temporal changes of mrna expression of three clock genes, qper2, qper3 and qclock, were studied in the suprachiasmatic nucleus (scn) of japanese quail under different light conditions, as well as under the condition of continuous melatonin. in addition, the expression of melatonin receptor genes, mel1a and mel1c, in the scn were also examined. the expression of qper2 mrna showed robust oscillation during both light and dark (ld) 12:12 cycles and under constant dark conditions (dd), but did not e ... | 2002 | 12405968 |
| the photoperiodic entrainment and induction of the circadian clock regulating seasonal responses in the migratory blackheaded bunting (emberiza melanocephala). | the properties of the circadian photoperiodic oscillator have been investigated in detail only in the japanese quail. while the study of the quail is clearly very important, one cannot simply assume that other species, especially passerines that seem to have a different circadian organization than quail, function the same way. the current set of experiments was conducted to understand the entrainment and photoinduction of the circadian photoperiodic oscillator in a passerine species, the blackhe ... | 2002 | 12405550 |
| occurrence of conjunctivitis, sinusitis and upper region tracheitis in japanese quail (coturnix coturnix japonica), possibly caused by mycoplasma gallisepticum accompanied by cryptosporidium sp. infection. | on a farm raising approximately 75,000 japanese quail (coturnix coturnix japonica) for egg production, the diseased quail showed clinical signs of swelling of the head, nasal discharge, increased lacrimation, and decreased egg production. the flock experienced a mortality rate of 5.7% per day. macroscopic observation revealed large, gelatinous masses of caseous exudate in the sinuses, egg peritonitis, and airsacculitis. microscopically, non-purulent or purulent inflammation accompanied by lympho ... | 2002 | 12396337 |
| [lampbrush chromosomes in the japanese quail coturnix coturnix japonica: cytological maps of macro chromosomes and meiotic crossover frequency in females]. | cytological maps of lampbrush macrobivalents of the japanese quail (coturnix coturnix japonica) were constructed. investigation of chiasmata allowed determination of the meiotic frequency of reciprocal genetic recombination (crossing over) in japanese quail females. the total chiasma number in bivalents of japanese quail oocyte nuclei was determined to be 53-58. macrobivalents 1-5 and z of the japanese quail had on average 3.3 chiasmata per bivalent, and microbivalents, 1.0-1.1 chiasmata per biv ... | 2002 | 12391886 |
| imitative learning in japanese quail (coturnix japonica) using the bidirectional control procedure. | in the bidirectional control procedure, observers are exposed to a conspecific demonstrator responding to a manipulandum in one of two directions (e.g., left vs. right). this procedure controls for socially mediated effects (the mere presence of a conspecific) and stimulus enhancement (attention drawn to a manipulandum by its movement), and it has the added advantage of being symmetrical (the two different responses are similar in topography). imitative learning is demonstrated when the observer ... | 2002 | 12391793 |
| id2 expression during apoptosis and satellite cell activation in unloaded and loaded quail skeletal muscles. | inhibitor of differentiation-2 (id2) is a basic helix-loop-helix protein that acts as a negative regulator of the myogenic regulatory transcription factor family, but id2 has also been implicated in apoptosis in several cell lines. in this study, we tested the hypothesis that id2 has a role in both apoptosis-associated muscle atrophy and muscle hypertrophy. a weight corresponding to 12% of the body weight was attached to one wing of japanese quail to induce hypertrophy in the patagialis (pat) mu ... | 2003 | 12388448 |
| ocular clocks are tightly coupled and act as pacemakers in the circadian system of japanese quail. | our previous studies showed that the eyes of japanese quail contain a biological clock that drives a daily rhythm of melatonin synthesis. furthermore, we hypothesized that these ocular clocks are pacemakers because eye removal abolishes freerunning rhythms in constant darkness (dd). if the eyes are indeed acting as pacemakers, we predicted that the two ocular pacemakers in an individual bird must remain in phase in dd and, furthermore, the two ocular pacemakers would rapidly regain coupling afte ... | 2003 | 12388441 |
| bone microstructure and developmental plasticity in birds and other dinosaurs. | patterns of bone microstructure have frequently been used to deduce dynamics and processes of growth in extant and fossil tetrapods. often, the various types of primary bone tissue have been associated with different bone deposition rates and more recently such deductions have extended to patterns observed in dinosaur bone microstructure. these previous studies are challenged by the findings of the current research, which integrates an experimental neontological approach and a paleontological co ... | 2002 | 12386894 |
| heterosis in body weight related to growth performance of parental lines of japanese quail and to heterosis in lay. | 1. three outbred lines of japanese quail and their reciprocal crosses were used. the lines differed in mature body weight or in the shape of the growth curve. growth was described by body weight (bw) at 0, 4, 7, 14, 21, 28, 35, 42, 48, 56, 63 and 70 d of age and expressed by the parameters of richards' function. dickerson's model was used to estimate direct genetic, maternal genetic and direct heterotic effects. 2. the magnitude of bw heterosis was not constant during postnatal growth, it showed ... | 2002 | 12365507 |
| toxicity of dietary heliotropium dolosum seed to japanese quail. | five groups of 30 male japanese quail, each 7-w-old, were fed diets containing 0, 1, 3, 5, or 10% (w/w) of dehulled h dolosum seed. half of the birds from the each group were killed at 6 and 24 w after beginning of the trial. at the end of 6th w, neither mortality nor clinical sign occurred in test groups. in the 5 and 10% inclusion levels, mild to moderate hepatic injury was detected as evidenced by mild karyomegaly, moderate fatty change, focal or portal fibrosis, bile duct hyperplasie, and ov ... | 2002 | 12361106 |
| social influences on food choices of norway rats and mate choices of japanese quail. | 2002 | 12354687 | |
| effects of exogenous testosterone on testicular luteinizing hormone and follicle-stimulating hormone receptors during aging. | during aging, the male japanese quail exhibits a loss of fertility, increased morphological abnormalities in the testes, and a higher incidence of sertoli cell tumors. although there is a coincident loss of reproductive behavior, plasma androgen levels remain high until testicular regression occurs in association with senescence. the purpose of this study was to compare mean specific binding of chicken luteinizing hormone (lh) and follicle-stimulating hormone (fsh) as a measure of testicular rec ... | 2002 | 12324665 |
| ultraviolet colour perception in european starlings and japanese quail. | whereas humans have three types of cone photoreceptor, birds have four types of single cones and, unlike humans, are sensitive to ultraviolet light (uv, 320-400 nm). most birds are thought to have either a violet-sensitive single cone that has some sensitivity to uv wavelengths (for example, many non-passerine species) or a single cone that has maximum sensitivity to uv (for example, oscine passerine species). uv sensitivity is possible because, unlike humans, avian ocular media do not absorb uv ... | 2002 | 12324539 |
| effects of lesions of nucleus taeniae on appetitive and consummatory aspects of male sexual behavior in japanese quail. | neurochemical, hodological and functional criteria suggest that the nucleus taeniae and parts of the adjacent archistriatum represent the avian homologue of parts of the mammalian amygdaloid complex. it has been proposed in particular that the nucleus taeniae is the homologue of the mammalian medial amygdala. in male quail, relatively large lesions to the posterior/medial archistriatum selectively decrease the expression of appetitive sexual behavior in a manner reminiscent of similar manipulati ... | 2002 | 12239468 |
| evidence for species differences in the pattern of androgen receptor distribution in relation to species differences in an androgen-dependent behavior. | chickens (gallus gallus domesticus) and japanese quail (coturnix japonica), two closely related gallinaceous bird species, exhibit a form of vocalization-crowing-which differs between the species in two components: its temporal acoustic pattern and its accompanying postural motor pattern. previous work utilizing the quail-chick chimera technique demonstrated that the species-specific characteristics of the two crow components are determined by distinct brain structures: the midbrain confers the ... | 2002 | 12210104 |
| solution structure of ascidian trypsin inhibitor determined by nuclear magnetic resonance spectroscopy. | the three-dimensional solution structure of ascidian trypsin inhibitor (ati), a 55 amino acid residue protein with four disulfide bridges, was determined by means of two-dimensional nuclear magnetic resonance (2d nmr) spectroscopy. the resulting structure of ati was characterized by an alpha-helical conformation in residues 35-42 and a three-stranded antiparallel beta-sheet in residues 22-26, 29-32, and 48-50. the presence of an alpha-helical conformation was predicted from the consensus sequenc ... | 2002 | 12186551 |
| effects of hemicastration and castration on foam production and its relationship with fertility in male japanese quail. | healthy heavy body weight strain of adult male japanese quail (coturnix coturnix japonica) of the same age were used in this study to observe the effect of hemicastration and castration on the frequency of foam discharges from cloacal gland and other related parameters. the quails were housed in individual cages and divided into four groups: control (intact birds), sham-operated control (intact birds with incision), hemicastrated, and castrated groups of birds. hemicastration and castration were ... | 2002 | 12182362 |
| t-maze behavior and early egg production in japanese quail selected for contrasting adrenocortical responsiveness. | broiler chicks that traverse a t-maze quickly to reinstate contact with their companions (hp, high performance) are known to grow faster, be more social, and exhibit a reduced plasma corticosterone (b) response to acute stress than slower (lp, low performance) chicks. genetic lines of japanese quail selected for reduced (ls, low stress) or exaggerated (hs, high stress) plasma b response to brief restraint also differ in sociality and performance. in the present study, we asked if divergence in e ... | 2002 | 12162359 |
| effect of low levels of dietary aflatoxin b1 on laying japanese quail. | in the present study, 256 7-wk-old japanese quail were randomly distributed into four experimental groups (64 birds per group) and given rations containing 0 (controls), 25, 50, or 100 (g aflatoxin b, (afb1)/kg feed for 168 d. each treatment consisted of four replicates of 16 quail. egg production and individual egg weight were checked daily. feed consumption and feed use were determined weekly. eggs laid in the last day of each 28-d laying period were collected and subjected to individual analy ... | 2002 | 12162358 |
| production and characterization of a turkey sperm mitochondrial monoclonal antibody and its usefulness for assessment of sperm integrity. | a monoclonal antibody (4c7/2e4) that binds to an antigen located on the midpiece of turkey spermatozoa has been produced and characterized. the antibody was also reactive to antigens on the midpiece of chicken, japanese quail, and bobwhite quail spermatozoa but was unreactive to spermatozoa from guinea fowl, human, horse, boar, and bull. immunogold transmission electron microscopy of turkey spermatozoa showed that the antibody was associated with the outer mitochondrial membrane. titratable anti ... | 2002 | 12162348 |
| selection of japanese quail for reduced adrenocortical responsiveness accelerates puberty in males. | differences in the onset of puberty were assessed in male japanese quail from a random-bred (rb, control) line and two lines that had been genetically selected for reduced (low stress, ls) or exaggerated (high stress, hs) plasma corticosterone response to brief mechanical restraint. at 42 d of age, cloacal gland area (carea) and volume (cvol), proportion of individuals that produced cloacal gland foam (picf), and intensity of cloacal gland foam production (cfp) were examined in 60 representative ... | 2002 | 12162347 |
| visual memory of shapes in quail chicks: discrimination among 2-dimensional objects. | newly hatched chicks spontaneously peck at conspicuous objects, and soon learn to discriminate between edible food particles and inedible objects. to examine whether this discrimination is based on a chick's ability to memorize objects by shape cues, we analyzed the pecking behavior. one- to 3-day old quail chicks (coturnix japonica) were presented with dry objects of different shapes (ball, disk, triangle and t-shape) of similar size (4 mm) and color (green). habituation occurred after repeated ... | 2002 | 12149571 |
| effects of starvation and refeeding on gonadotropin and thyrotropin subunit mrnas in male japanese quail. | the contents of mrnas encoding lh beta-, fsh beta-, tsh beta- and common alpha-subunit precursor molecules were measured in food-deprived and subsequently re-fed male japanese quail. pituitary lh beta, fsh beta and common alpha mrna levels were decreased by starvation, and increased to the control levels by re-feeding. the rates of decreases of lh beta and common alpha mrna levels were greater the corresponding rate for fsh beta levels. pituitary tsh beta mrna levels were not decreased by starva ... | 2002 | 12130823 |
| expression of s-100 protein in intercalated duct cells of bovine pancreas. | although mutoh et al. have found intercalated ducts in the pancreatic islets of avians, including the chicken, moorhen (gallinula chloorpus), and japanese quail (coturnix coturnix japonica), and even demonstrated the functions of intercalated duct cells in pancreatic islets, to our knowledge, there have been only a few reports on the relationship between intercalated ducts and islets in mammalia. accordingly, in this study, we investigated whether intercalated ducts are morphologically related t ... | 2002 | 12126053 |
| effects of starvation on gonadotropin and thyrotropin subunit mrna levels and plasma hormone levels in the male japanese quail (coturnix coturnix japonica). | contents of mrnas encoding lhbeta-, fshbeta-, tshbeta- and common a-subunit precursor molecules were measured in male japanese quail deprived of food for three days. plasma lh, fsh, thyroxine and triiodothyronine levels were also measured in the same birds. plasma lh levels declined during the period of food deprivation. levels in starved birds were not different from those in control birds after one day of starvation but were significantly lower after three days. plasma fsh levels showed a simi ... | 2002 | 12125931 |
| development of embryos from in vitro ovulated and fertilized oocytes of the quail (coturnix coturnix japonica). | the development of quail embryos obtained after in vitro fertilization of oocytes ovulated in vitro was investigated. about 40% of the specimens, after 18-20 hr of incubation, had undergone cleavage to reach stages iv-vi when viewed under a stereo microscope. however, only 36% of these embryos contained normal, dapi-stained nuclei when observed under a fluorescent microscope; the other 64% showing a morphologically normal cleavage pattern did not contain nuclei. control unfertilized oocytes, ovu ... | 2002 | 12115941 |
| steroid modulation of muscarinic cholinergic and alpha2-adrenergic receptor density in the nucleus intercollicularis of the japanese quail. | androgen modulation of neurotransmitter receptor density was investigated in the nucleus intercollicularis (ico) of male and female japanese quail (coturnix coturnix japonica). ico appears to play an important role in the neural control of testosterone (t) dependent vocal behaviour. two receptor types were investigated in this nucleus; muscarinic cholinergic receptors, labelled using [3h]n-methyl scopolamine (nms) as the ligand, and alpha2-adrenergic receptors, labelled using [3h]p-amino-clonidi ... | 1990 | 12106090 |
| [morphological study of gastrocnemius muscle in japanese quail chicks hatched out in space flight]. | slovak experiment quail sk-6 aboard orbital station mir in the period of february 20-27, 1999 resulted in hatching out of viable chicks of the japanese quail. the paper presents morphologic results of investigation of m. gastrocnemius of the chicks after 4-5-d life in space microgravity. on the whole, histologically the gastrocnemius of the space chicks was very much similar to that of the control group. muscular fibers were, which is typical, striated; bundles of myofibrills and numerous nuclei ... | 2002 | 12098956 |
| [the effect of argon-containing hypoxic gas environment on development of japanese quail embryos]. | in case of acute hypoxic hypoxia argon in the gas environment is favorable to survivability of laboratory animals (rats). our purpose was to evaluate effects of an argon-containing hypoxic gas environment on embryogenesis of the japanese quail (cortunix cortunix japonica). eggs of the japanese quail were incubated in a pressurized chamber with a hypoxic gas environment differing in concentration of nitrogen and argon. in hypoxic (10% o2) oxygen-nitrogen and oxygen-nitrogen-argon atmospheres tota ... | 2002 | 12098947 |
| pineal melatonin secretion, but not ocular melatonin secretion, is sufficient to maintain normal immune responses in japanese quail (coturnix coturnix japonica). | reports that plasma melatonin is an important immune regulator in avian species have been rather sparse and contradictory. also, the primary source of immune-modulating melatonin has yet to be determined in birds. in japanese quail (coturnix coturnix japonica), the pineal gland and eyes contribute roughly two thirds and one third of the melatonin found in the blood, respectively. two experiments were conducted to evaluate melatonin as an immune modulator in japanese quail and to determine the pr ... | 2002 | 12093123 |
| red cell and plasma antioxidant components and atherosclerosis in japanese quail: a time-course study. | our study aims to examine changes in red cell and plasma antioxidant components in relation to age and aortic lesion development in sus japanese quail during a 12-week period of dietary cholesterol supplementation. one hundred adult sus males were divided into 5 treatment groups and were fed either a control or a cholesterol-supplemented (0.5% w/w) diet. birds were sacrificed after 0, 4, 8 and 12 weeks on the diets and examined for plaque development and antioxidant components status. "aging" wa ... | 2013 | 12090354 |
| evaluation of tiletamine-zolazepam as an anesthetic in quail (coturnix coturnix japonica). | the objective of the present study was to evaluate the effects of tiletamine-zolazepam (tz) administered alone or in combination with atropine, xylazine, and levomepromazine to quail (coturnix coturnix japonica). the induction time, duration of hypnosis and anesthesia, and time to recovery were determined. the presence or absence of tremor, upper respiratory tract secretions, and excitability and the degree of muscular tone were also observed. the results showed that doses from 10 to 100 mg/kg t ... | 1999 | 12086457 |
| microsatellite loci in japanese quail and cross-species amplification in chicken and guinea fowl. | in line with the gifu university's initiative to map the japanese quail genome, a total of 100 japanese quail microsatellite markers isolated in our laboratory were evaluated in a population of 20 unrelated quails randomly sampled from a colony of wild quail origin. ninety-eight markers were polymorphic with an average of 3.7 alleles per locus and a mean heterozygosity of 0.423. to determine the utility of these markers for comparative genome mapping in phasianidae, cross-species amplification o ... | 2002 | 12081810 |
| expression of myostatin is not altered in lines of poultry exhibiting myofiber hyper- and hypoplasia. | decades of selective breeding have yielded lines of poultry with substantial myofiber hyperplasia, vet little is known about what genes have been altered during the course of selection. myostatin is a strong negative regulator of muscle mass in mice and cattle and could have been one of many genetic factors contributing to increased myofiber deposition in growth-selected lines of poultry. to test this hypothesis, the sequence and expression patterns of myostatin were analyzed in growth-selected ... | 2002 | 12079046 |
| an unusual mechanism of disposal of superfluous spermatozoa in vasectomised quails. | as part of a series of studies designed to evaluate usual and potential functions of epithelial cells in the avian epididymis under varying circumstances, adult, sexually active male japanese quails were vasectomised for 3, 6 and 8 weeks. the testes, epididymides and deferent ducts were studied histologically and ultrastructurally. testicular lesions were minimal, but epididymal response was profound. non-ciliated (type i) cells of the proximal efferent duct (ped) actively phagocytized spermatoz ... | 2002 | 12076112 |
| the parvocellular vasotocin system of japanese quail: a developmental and adult model for the study of influences of gonadal hormones on sexually differentiated and behaviorally relevant neural circuits. | vasotocin (vt; the antidiuretic hormone of birds) is synthesized by diencephalic magnocellular neurons projecting to the neurohypophysis. a sexually dimorphic system of vt-immunoreactive (ir) parvocellular elements has been described within the male medial preoptic nucleus (pom) and the nucleus of the stria terminalis, pars medialis (bstm). vt-ir fibers are present in many diencephalic and extradiencephalic locations, and quantitative morphometric analyses demonstrated their sexually dimorphic d ... | 2002 | 12060839 |
| the assessment of nociceptive and non-nociceptive skin sensitivity in the japanese quail (coturnix japonica). | we evaluated the efficacy of two nociceptive tests, the hot water (hwt) and the foot pressure tests (fpt), and one non-nociceptive test (semmes-weinstein test, swt) in assessing skin sensitivity in conscious japanese quail. all stimuli elicited a reflex-like, strongly reproducible response. responses in the hwt and fpt were identified as typical nocifensive flight-fight behavior. in untreated birds, these responses occurred at temperatures and forces described previously as noxious. in the swt, ... | 2002 | 12044663 |
| chromium supplementation can alleviate negative effects of heat stress on egg production, egg quality and some serum metabolites of laying japanese quail. | this study was conducted to determine the effects of cr (chromium picolinate, crpic) supplementation at various levels (0, 200, 400, 800 or 1200 microg/kg of diet) on egg production, egg quality and serum concentrations of insulin, corticosterone and glucose in laying japanese quail (coturnix coturnix japanica) reared under conditions of heat stress (32.5 degrees c). laying japanese quail (n = 150; 45 d old) were divided into five groups of 30 birds. the quail were fed either a control diet cont ... | 2002 | 12042444 |
| daily temporal organization of laying in japanese quail: variability and heritability. | in birds, many behavioral and physiological processes that occur during reproduction show daily rhythms in response to environmental temporal constraints. in this study, the individual daily organization of laying and its genetic determinant in japanese quail (coturnix coturnix japonica) were analyzed. for this purpose, the oviposition time of 102 randomly chosen females, maintained in long-day photoperiodic conditions (ld 14 h:10 h) for 1 mon was observed and extreme phenotypes selected. laying ... | 2002 | 12025931 |
| cyclic melatonin synchronizes the circadian rhythm of feeding activity in japanese quail, coturnix c. japonica. | in japanese quail, we can observe the circadian rhythm of feeding activity in constant conditions, especially in birds from selected lines. in order to try to test the importance of melatonin as hormonal output for the circadian system, we gave a 24-h period cycle of exogenous melatonin to some of these birds when they were free running. we used castrated males firstly in order to cancel the known effect of steroids on circadian organisation. secondly, as castrated birds generally expressed a ve ... | 2002 | 12017768 |
| phylogenetic analysis in chicken breeds inferred from complete cytochrome b gene information. | complete cytochrome b (cyt b) gene (1140 bp) nucleotide sequences were used to investigate characteristics of the genetic constitution of chunky broiler chickens, and these were compared with the hy-line and wl-gm (garber) line of white leghorn, the gsp line of fayoumi, the bm-c line of black minorca (egg-chickens), and an outgroup of wild-origin japanese quail. a high genetic difference (five haplotypes) was observed at the cytochrome b region in the chunky broiler in contrast to the high homol ... | 2002 | 12017507 |
| testing homology of loci for two plumage colors, "lavender" and "recessive white," with chicken and japanese quail hybrids. | homology for two plumage color loci was studied by hybridization between chickens and japanese quail. first, chicken-quail hybrids were produced from homozygous "lavender" chicken cocks and "bleu" japanese quail, and all 30 hybrids had the same parental slate blue plumage color. on the other hand, no hybrids with this plumage were obtained out of 18 progeny from the same cocks and wild-type quail. these results show that the slate blue plumage color is determined by homologous loci in japanese q ... | 2002 | 12011184 |
| neurons expressing neuropeptide y mrna in the infundibular hypothalamus of japanese quail are activated by fasting and co-express agouti-related protein mrna. | the neural mechanisms involved in the compensatory hyperphagia exhibited by many vertebrate species after a fast are not fully understood but, in mammals, appear to involve nutritionally-sensitive neurons that co-express neuropeptide y (npy) and agouti-related protein (agrp) in the infundibular hypothalamus. we investigated whether these neurons have been evolutionarily conserved in a non-mammalian vertebrate, the japanese quail. birds exhibited compensatory hyperphagia 1 h after return of food ... | 2002 | 12008019 |
| role of carbon dioxide and ion transport in the formation of sub-embryonic fluid by the blastoderm of the japanese quail. | 1. the explanted blastoderm of the japanese quail was used to explore the role of ions and carbon dioxide in determining the rate of sub-embryonic fluid (sef) production between 54 and 72 h of incubation. 2. amiloride, an inhibitor of na+/h+ exchange, at concentrations of 10(-3) to 10(-6) m substantially decreased the rate of sef production when added to the albumen culture medium. n-ethylmaleimide, an inhibitor of v type h+ atpase, also decreased this rate but only to a small extent at the high ... | 2002 | 12003326 |
| a comparative cytogenetic study of chromosome homology between chicken and japanese quail. | in order to construct a chicken (gallus gallus) cytogenetic map, we isolated 134 genomic dna clones as new cytogenetic markers from a chicken cosmid dna library, and mapped these clones to chicken chromosomes by fluorescence in situ hybridization. forty-five and 89 out of 134 clones were localized to macrochromosomes and microchromosomes, respectively. the 45 clones, which localized to chicken macrochromosomes (chromosomes 1-8 and the z chromosome) were used for comparative mapping of japanese q ... | 2001 | 11978979 |
| adeno-associated virus-mediated transfer of human acid maltase gene results in a transient reduction of glycogen accumulation in muscle of japanese quail with acid maltase deficiency. | glycogen storage disease type ii (gsd ii), pompe's disease, is caused by the deficiency of acid alpha-d-glucosidase (gaa) in lysosome and is the most common form of gsd in taiwan. most cases are the infantile form. the disease is relentless and most patients die of cardiac failure and respiratory tract infection in the first year of life. at present, no treatment has been proved effective for this fatal disease. the applicability of enzyme replacement therapy is under investigation. however, hig ... | 2002 | 11973631 |
| the role of static features of males in the mate choice behavior of female japanese quail (coturnix japonica). | in two experiments, we investigated the mate choice behavior of female japanese quail toward taxidermically-prepared male models. both experiments consisted of four phases: (1) habituation; (2) a pre-test in which two taxidermically-prepared models of male birds were presented; (3) observation in which the respective non-preferred male model was presented either alone or with another stimulus, and (4) a post-test in which male models were again presented alone. results showed that focal females ... | 2002 | 11955775 |
| effects of vitamin c and vitamin e on lipid peroxidation status, serum hormone, metabolite, and mineral concentrations of japanese quails reared under heat stress (34 degrees c). | this study was conducted to determine the effects of dietary vitamin c (l-ascorbic acid) and vitamin e (alpha-tocopherol acetate) on lipid peroxidation status measured as mda and serum triiodothyronine (t3), thyroxine (t4), thyroid-stimulating hormone (tsh), adrenocorticotropic hormone (acth), as well as some other serum metabolite and mineral concentrations of japanese quails reared under heat stress (34 degrees c). one hundred-eighty 10-day-old japanese quails were randomly assigned to six tre ... | 2002 | 11944200 |
| auditory stimulus-induced changes in immediate-early gene expression related to an inborn perceptual predisposition. | auditory-induced expression of the immediate-early gene zenk was examined in 18 brain areas of domestic chicken and japanese quail subjects with no previous exposure to parental vocalizations. after one 30-min exposure (approximately 120 calls) within 24 h of hatching to either the chicken or quail maternal call, paired subjects from each species showed significantly more intense levels of zenk staining to conspecific (own species) calls. single brain areas did not show consistent, large differe ... | 2002 | 11935228 |
| attenuation of ca(2+)-activated atpase and shortening velocity in hypertrophied fast twitch skeletal muscle from aged japanese quail. | the effect of aging on the in vitro contractile properties of the patagialis (pat) muscle of 35 young adult (ya; 8 weeks of age) and 35 aged adult (aa, 110 weeks of age) coturnix quails was examined after 0-30 days of stretch-overload. overload was achieved by placing a weight equivalent to 12% of the birds' body weight on one wing. the contralateral wing served as the intra-animal control. overload increased the weight of the pat by 45.1+/-2.1% in ya, and 24.1+/-2.6% in aa. twitch contraction t ... | 2002 | 11909684 |