Publications
| Title | Abstract | Year Filter | PMID(sorted ascending) Filter |
|---|
| shivering thermogenesis in leg and breast muscles of galliform chicks and nestlings of the domestic pigeon. | we studied the ontogeny of shivering thermogenesis in breast and leg muscles of precocial galliforms (domestic fowl, grey partridge, and japanese quail) and the altricial domestic pigeon using electromyography (emg) and indirect calorimetry. galliforms were able to increase heat production by shivering in leg muscles at the youngest age studied (1-2 d). pectorals contributed to heat production from days 7-10 onward, but in the partridge and especially in the fowl, shivering by the pectorals was ... | 1999 | 10438684 |
| estrogen receptor-beta in quail: cloning, tissue expression and neuroanatomical distribution. | a partial estrogen receptor-beta (erbeta) cdna had been previously cloned and sequenced in japanese quail. the 3'- and 5'-rapid amplification of cdna ends techniques were used here to identify a cdna sequence of the quail erbeta that contains a complete open reading frame. for the first time in an avian species, this cdna sequence and the corresponding amino acid sequence are described. they are compared with the known erbeta sequences previously described in mammals and with the eralpha sequenc ... | 1999 | 10440733 |
| japanese quail microsatellite loci amplified with chicken-specific primers. | forty-eight primer pairs for chicken (gallus gallus) microsatellite loci were tested in polymerase chain reaction (pcr) amplification of japanese quail (coturnix japonica) genomic dna. amplification products were obtained from 28 primer-pairs (58.3%) after optimizing the pcr conditions. eleven (22.9%) of these generated specific products and 17 yielded non-specific amplification products. eight markers (adl0037, adl0038, adl0142, adl0143, adl0206, adl0315, adl0366, and huj0006) were polymorphic ... | 1999 | 10442981 |
| regulation of the expression of serotonin n-acetyltransferase gene in japanese quail (coturnix japonica): i. rhythmic pattern and effect of light. | serotonin n-acetyltransferase [arylalkylamine n-acetyltransferase (aanat); ec2.3.1.87] is the rate-limiting enzyme in melatonin synthesis, and its activity exhibits a diurnal rhythm similar to that of the melatonin content in the pineal gland and retina of japanese quail. studies were conducted to characterize the japanese quail aanat cdna, and to evaluate the expression of aanat mrna in the pineal gland, the retina, and other peripheral tissues. the nucleic acid sequence of a 400 bp cdna clone ... | 1999 | 10451021 |
| regulation of the expression of serotonin n-acetyltransferase gene in japanese quail (coturnix japonica): ii. effect of vitamin a deficiency. | levels of serotonin n-acetyltransferase [arylalkylamine n-acetyltransferase (aanat); ec2.3.1.87] mrna, aanat activity, and melatonin display a rhythmic pattern in both the pineal gland and the retina. it has been shown that vitamin a is required to maintain the rhythm of melatonin synthesis in the pineal gland of japanese quail. to understand the mechanism underlying the direct relationship among these factors, we developed an assay system sensitive enough to determine aanat mrna, aanat activity ... | 1999 | 10451022 |
| chemical analysis of melanin pigments in feather germs of japanese quail bh (black at hatch) mutants. | bh (black at hatch) is a mutation of japanese quails which causes darkening or lightening of the plumage in heterozygotes or homozygotes, respectively. we chemically analyzed melanin pigments in feather germs of bh mutant embryos and in feathers of adult animals. dark brown dorsal feathers of wild-type adult animals had white barrings, but heterozygous ones lacked clear barrings. the feathers of wild-type and heterozygote animals contained both eumelanins and pheomelanins, the latter being more ... | 1999 | 10454294 |
| timidity in japanese quail: effects of vitamin c and divergent selection for adrenocortical response. | male japanese quail chicks of two genetic lines selected for low (ls) or high (hs) adrenocortical responses to mechanical restraint were housed in mixed-line groups of 24 in four compartments of a multitier brooder battery at 20 days of age. quail in two of the four compartments were given vitamin c (ascorbyl-2-polyphosphate, app, 1 g l-ascorbic acid/l) solution for 48 h, whereas the other birds received untreated tap water as usual before they were tested at 23 days of age. at test, each quail ... | 1999 | 10463637 |
| corticotropin-releasing hormone-immunopositive nerve elements in apposition to chicken gonadotropin-releasing hormone i-containing perikarya in japanese quail (coturnix coturnix japonica) brain. | the neuroanatomic basis of how stress inhibits reproduction in birds is not understood. to address this question we used double-label immunofluorescence histochemistry to determine whether corticotropin-releasing hormone (crh)-immunoreactive (ir) neuronal elements contact chicken gonadotropin-releasing hormone i (cgnrh i)-ir somata in brains of japanese quail. the double-label system used a sheep anti-cgnrh i primary antibody with a secondary antibody conjugated to dichlorotriazinylaminofluoresc ... | 1999 | 10470492 |
| the effect of branched chain amino acids on protein synthesis in two skeletal muscles of japanese quail. | two different isolated skeletal muscles of japanese quail were used. the influence of branched chain amino acids on the fractional rate of protein synthesis (fsr) was evaluated using 14c-tyrosine. the addition of 0.5 mm valine, leucine or isoleucine to the incubation medium significantly decreased (p<0.05) the value of fsr in extensor metacarpalis radialis. in the ambiens muscle only the application of leucine increased the fsr significantly while valine and isoleucine were without any effect. | 1999 | 10470867 |
| the chicken leptin gene: has it been cloned? | the dna sequence of a chicken leptin gene that shares 95% nucleotide similarity with the mouse leptin sequence has been recently reported (taouis et al., 1998, gene 208, 239-242). experiments have been performed independently in two laboratories to try to confirm this finding. fourteen pcr primers based on the mouse leptin sequence were designed to amplify the avian leptin gene. four of the primers were identical to the mouse and published chicken leptin sequences. pcr amplification was carried ... | 1999 | 10480986 |
| outbreak of septicaemic colibacillosis in japanese quail (coturnix coturnix japonica). | we have carried out an aetiological and pathological study of an outbreak of septicaemia caused by the o165 serogroup of escherichia coli in japanese quail (coturnix coturnix japonica) which resulted in high mortality (90%). after treatment with amoxicilin in drinking water (200 mg/l), morbility and mortality rates dropped markedly. microbiological studies showed that the organism responsible was an atypical e. coli strain, on the basis of the non-fermentation of lactose (onpg-), which belonged ... | 1999 | 10481623 |
| seasonal morphology of the domestic quail (coturnix coturnix japonica) testis. | a histological study was conducted on the testes of adult domestic quails (coturnix coturnix japonica) over a year. the results revealed a clear variation of testicular weight, seminiferous tubule diameter, and the thickness and composition of the germinal epithelium over the year. the highest testicular weights were detected at the end of the autumn and during the winter (short-day period), reaching a maximum, together with spermatogenic activity, in september (long-day period in the southern h ... | 1999 | 10488624 |
| the avian egg as a test system for endocrine disrupters: effects of diethylstilbestrol and ethynylestradiol on sex organ development. | many environmental contaminants are known or suspected to interfere with hormonal function in animals. in vivo test methods to detect and characterize chemicals that disrupt the endocrine system are therefore urgently needed. in this study, we assessed the usefulness of abnormalities of the reproductive organs as test endpoints for estrogenic activity of xenobiotics in japanese quail embryos. two synthetic estrogens, diethylstilbestrol (des) and ethynylestradiol (ee2), were injected into the yol ... | 1999 | 10492898 |
| dietary tbto exposure to the japanese quail: relation between exposure period and appearance of reproductive effects. | 1999 | 10501716 | |
| formal properties of the circadian and photoperiodic systems of japanese quail: phase response curve and effects of t-cycles. | a role for the circadian system in photoperiodic time measurement in japanese quail is controversial. the authors undertook studies of the circadian and photoperiodic system of japanese quail to try to identify a role for the circadian system in photoperiodic time measurement. the circadian studies showed that the circadian system acts like a low-amplitude oscillator: it is readily reset by light without significant transients, has a type 0 phase response curve (prc), and has a large range of en ... | 1999 | 10511005 |
| epitopes for chicken monoclonal antibodies in spleens of selected japanese quail lines. | a line of japanese quail selected for high plasma cholesterol is highly susceptible to diet-induced atherosclerosis. lymphocyte epitopes recognized by mouse anti-chicken monoclonal antibodies (c-mab), tcr-1, tcr-2, tcr-3. cd-3, cd-4, cd-8, and bu-1a/b were reacted with spleens from quail selected for high (hl) and low (ll) plasma total cholesterol and their nonselected controls (cl). cross reactivity to c-mab and effect of line and gender were immunohistochemically evaluated. chicken spleens wer ... | 1999 | 10512460 |
| affiliative preferences are stable and predict mate choices in both sexes of japanese quail, coturnix japonica. | most laboratory studies of mate choice use affiliation as a surrogate measure for actual choice of a partner for copulation. in a series of recent studies using affiliation as a dependent variable, we showed that the tendency of both male and female japanese quail to affiliate with members of the opposite sex is profoundly affected by seeing them mate with others: female quails show an increased tendency to affiliate with males that they have seen mating; and male quails show a decreased tendenc ... | 1999 | 10512660 |
| effect of divergent selection for total plasma phosphorus on plasma and yolk very low density lipoproteins and plasma concentrations of selected hormones in laying japanese quail. | japanese quail lines were divergently selected over 32 generations for laying hen plasma yolk precursor, as measured by total plasma phosphorus (tpp). the high (hp) and low (lp) lines were developed from a randombred control population (r1) that was maintained without conscious selection. the purpose of the present study was to characterize the composition of very low density lipoproteins (vldl) in laying japanese quail hens (vldly) and the concentration of selected hormones in laying hens from ... | 1999 | 10515352 |
| heterosis following long-term bidirectional selection for mating frequency in male japanese quail. | reciprocal crosses (sire line shown first and dam line second) among high (h) and low (l) selected lines and the randombred control line (c), which was the base population for the selected lines, were made after 40 generations of bidirectional selection for mating frequency of male japanese quail. significant heterosis for the selected trait was found only in crosses between lines c and l, being 62 and 92% for lc and cl, respectively. heterosis for percentage of maters was present in all crosses ... | 1999 | 10515353 |
| steroid sensitive sites in the avian brain: does the distribution of the estrogen receptor alpha and beta types provide insight into their function? | studies in avian species have often been useful in elucidating basic concepts relevant to the regulation of reproductive behaviors by sex steroid hormones. once a link between a steroid hormone and a behavioral response has been established, one can use the localization of steroid hormone receptors in the brain to facilitate the identification of neural circuits that control behavior. the recent identification of a second type of estrogen receptor called estrogen receptor beta or erbeta has rais ... | 1999 | 10516402 |
| growth, developmental stability and immune response in juvenile japanese quails (coturnix coturnix japonica). | stresses are environmental factors which restrict growth or cause a potentially adverse change in an organism. the exposure of developing organisms to environmental stresses may have several physiological consequences including a decrease in immunocompetence. however, mounting an immune response against a foreign antigen may in itself constitute a cost for developing organisms. this cost has potentially long-term consequences for adult function and fitness. this study examines the growth and dev ... | 1999 | 10518322 |
| effects of sexual interactions with a male on fos-like immunoreactivity in the female quail brain. | sexual interactions can cause changes in plasma hormone levels and activate immediate early genes within the mammalian brain. there are marked anatomical differences between the regions activated that relate directly to the sexual specific behaviour and neuroendocrinology of each sex. the aim of this study was to determine if such a sexual dimorphism exists in birds by examining the brain regions stimulated in adult virgin female japanese quail (coturnix japonica) during sexual behaviour and com ... | 1999 | 10520126 |
| role of melatonin in the control of growth and growth hormone secretion in poultry. | the pineal hormone melatonin controls reproduction of photoperiodic mammals and is an integral part of the circadian organization in birds. recent findings indicate an involvement of this hormone also in more basic physiological processes, including growth, development, and aging. melatonin may modulate growth in poultry through interaction with transcriptional factors, through interaction with hormones involved in growth control, and by modulation of energy metabolism and decreasing physical ac ... | 1999 | 10527123 |
| expression and localization of the proteoglycan decorin during the progression of cholesterol induced atherosclerosis in japanese quail: implications for interaction with collagen type i and lipoproteins. | the temporal and spatial distribution, and relative levels of the proteoglycan decorin and collagen type i were examined 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 or 0.5% added cholesterol diet at approximately 16 weeks of age. dorsal aortas were collected at 1- or 2-week intervals over a 15-week period after initiating cholesterol feeding. biochemical analysis for d ... | 1999 | 10532686 |
| genetic relationship among lines and smooth muscle and ovarian follicular development within lines of japanese quail in two long-term selection studies. | smooth muscle tumor and ovarian follicular development were studied in lines of japanese quail selected for increased 4-wk bw (hw, p, and t) and their randombred controls (c and r1). the lines studied were from long-term selection studies at the ohio state university (hw and r1) and the university of georgia (p, t, and c). to study the genetic relationship among the lines in the two selection studies, the c, p, hw, and r1 lines were dna-fingerprinted by digestion of the dna with the haeiii restr ... | 1999 | 10536783 |
| phenotypic flexibility of the avian gizzard: rapid, reversible and repeated changes of organ size in response to changes in dietary fibre content | evolutionary biology presumes that organ capacities match their natural loads. therefore, in fluctuating conditions, organ systems are expected to show a reversible, repeatable and rapid phenotypic response that is directional and scaled. in this study, phenotypic responses of the gizzard of adult japanese quail (coturnix japonica) to experimental mismatches of load and capacity were tested by a series of diet-switching experiments, involving an increased content of non-digestable fibre (ndf) in ... | 1999 | 10539966 |
| sexual behavior in japanese quail as a test end point for endocrine disruption: effects of in ovo exposure to ethinylestradiol and diethylstilbestrol. | chemicals having a capacity to disturb the endocrine system have attracted considerable interest during recent years. there is a shortage of well-characterized in vivo tests with which to study such disturbances in different classes of vertebrates. in the present study, test end points related to reproduction in the japanese quail were used to examine the estrogenic activity of chemicals. the synthetic estrogens ethinylestradiol (ee(2)) and diethylstilbestrol (des), used as model compounds, were ... | 1999 | 10544152 |
| development of the skeleton in japanese quail embryos. | in the research fields of experimental embryology, teratological testing, and developmental engineering in avian species, a knowledge of normal embryonic development is necessary so that research may be performed efficiently and precisely. a series of normal stages based on external appearance has been established in both chicken and quail embryos. those based on skeletal features, however, have not been elucidated. the present study newly established a series of normal stages for the developmen ... | 1999 | 10545025 |
| separation of enantiomers on a chiral stationary phase based on ovoglycoprotein. vii. comparison of chiral recognition ability of ovoglycoprotein from chicken and japanese quail egg whites. | ovoglycoproteins from chicken and japanese quail egg whites (ogchi and ogjpq, respectively) were isolated, and characterized by isoelectric focusing, high-performance capillary electrophoresis, reversed-phase hplc and matrix-assisted laser-desorption ionization time-of-flight (maldi-tof) ms. the isoelectric point (pi) of natural ogchi was 4.37-4.51 by isoelectric focusing, while natural ogjpq showed two discrete bands at pi 4.68 and 4.77. the average molecular masses of natural ogchi and ogjpq w ... | 1999 | 10551348 |
| cardiac ganglia of japanese quail--distribution and morphology. | the cardiac ganglia in japanese quail were studied with the use of histological, histochemical and ultrastructural techniques. histological investigations revealed the presence of a number of cholinergic ganglia in the fatty tissue of the epicardium. they were grouped in plexo-ganglionic forms localised in three regions: 1) on the ventral surface of the cardiac atria, 2) on the ventral surface of the cardiac ventricle, 3) on the dorsal surface of the cardiac ventricle. these plexoganglia are str ... | 1999 | 10560012 |
| associated effects of the roux plumage color mutation on growth, carcass traits, egg production, and reproduction of japanese quail. | after two generations of introgression of the sex-linked recessive roux color mutation into a commercial broiler japanese quail line with wild-type plumage, growth, carcass, egg laying, and reproduction of birds were evaluated and compared for all types of birds produced (considering sex, line, and plumage). usual sex differences were obtained for bw, with larger values in females and 5% sexual dimorphism. weights were larger also in the pure commercial line, which had a higher hatching rate (hr ... | 1999 | 10560817 |
| immunochemical characterization of ovomucoid from japanese quail egg white using monoclonal antibodies. | the ovomucoid of japanese quail egg white is known as a proteinase inhibitor or protein component responsible for egg allergy. in order to characterize the antigenic properties of ovomucoid in relation to its molecular structure, we have prepared two monoclonal antibodies, e9 (igg1) and e11 (igg1), recognizing distinct epitopes from each other. these monoclonal antibodies bound to the sds/mercaptoethanol-treated ovomucoid, but not to the reductively carboxymethylated and pyridylethylated ovomuco ... | 1999 | 10575639 |
| effect of clinoptilolite on performance of japanese quail (coturnix coturnix japonica) during experimental aflatoxicosis. | clinoptilolite (cli, a natural zeolite), incorporated into the diet at 50 g/kg, was evaluated for its ability to reduce the deleterious effects of 2.0 mg total aflatoxin (af;83.06% afb1, 12.98% afb2, 2.84% afg1 and 1.12% afg2)/kg diet on growing japanese quail chicks from 10 to 45 d of age. a total of 40 japanese quail chicks were divided into 4 treatment groups (control, af, cli, af plus cli) each consisting of 10 chicks. the performance of the birds was evaluated. the af treatment significantl ... | 1999 | 10579408 |
| effects of oestradiol-17beta and testosterone on progesterone production in the cultured granulosa cells of japanese quail. | in order to study the effects of steroid hormones on steroidogenesis in the avian ovary, quail granulosa cells were cultured with follicle stimulating hormone (fsh), oestradiol-17beta or testosterone. the progesterone content of the medium during the culture period of 66 h and the following 3 h of incubation with luteinising hormone (lh), was measured by radioimmunoassay. when fsh, oestradiol-17beta or testosterone were added during the 66 h culture, subsequent progesterone production by the cel ... | 1999 | 10579414 |
| involvement of mitogen-activated protein kinase in transforming growth factor alpha-stimulated cell proliferation in the cultured granulosa cells of the japanese quail. | the avian granulosa cells proliferate during follicular growth phase and differentiate to produce progesterone in response to luteinizing hormone (lh) when the follicle becomes the largest. in order to study the involvement of mitogen-activated protein (map) kinase in proliferation of the granulosa cells in avian species, quail granulosa cells were cultured for 66 h with various hormones (follicle stimulating hormone (fsh), lh, progesterone, estradiol-17beta, testosterone), or growth factors (tr ... | 1999 | 10579644 |
| circadian organization in quail retina: differential regulation of melatonin synthesis and iodopsin gene expression in vitro. | adult japanese quail have an endogenous circadian clock located in their eyes that has been shown to regulate melatonin biosynthesis. we investigated if a circadian oscillator is present in cultures of dispersed embryonic quail retina. melatonin release in retinal cell culture is modulated by the light cycle, indicating that there are functional photoreceptors in culture. however, when cultures were placed in constant darkness no rhythm of melatonin was observed, indicating that at this period o ... | 2013 | 10580720 |
| effects of testosterone on the synaptology of the medial preoptic nucleus of male japanese quail. | the medial preoptic nucleus (pom) of male japanese quail is a sexually dimorphic testosterone-dependent structure that plays a key role in the activation of male sexual behavior. both the total volume of the nucleus and the size of the dorsolateral neurons are decreased in gonadectomized males. immunocytochemical studies have revealed a complex pattern of innervation: immunopositive fibers for several neuropeptides and neurotransmitters have been detected in the pom; some of them (e.g. vasotocin ... | 1999 | 10582522 |
| pretreatment methods to improve nerve immunostaining in corneas from long-term fixed embryonic quail eyes. | pretreatment methods were used to improve neurofilament immunostaining in corneas from embryonic day 16 japanese quail corneas that had been stored in fixative solution for several months. a sequential combination of the following three pretreatments: brief microwave heating in saline, followed by extraction with sodium dodecyl sulfate (sds) at 37 degrees c, followed by digestion with hyaluronidase at 37 degrees c, produced significantly increased antibody staining of corneal neurofilament prote ... | 1999 | 10595714 |
| ultrastructural observations of the neurocytes in pterygopalatine ganglion of japanese quail (coturnix coturnix v. japonica). | cells of the pterygopalatine ganglion in quail are elliptical, oval and often spindle shape. they have single nuclei, which are spindle or lentiform in shape. the rough endoplasmic reticulum was observed in a great amount, especially in the vicinity of nucleus. it was organised in structure corresponding to nissl's body. the mitochondria are present mainly at the periphery of the cells. several flat, elongated cisterns form the golgi apparatus. there are a few lysosomes, mostly primary ones. pro ... | 1999 | 10598402 |
| effect of paraquat on glutathione activity in japanese quail. | 2000 | 10606696 | |
| temperature-dependent inhibition of motility in spermatozoa from different avian species. | this study demonstrates that the pattern of temperature-dependent inhibition of chicken sperm motility at 40 degrees c in vitro, and its release by calcium, is also found in drake spermatozoa and, partially, in turkey spermatozoa. however, no such temperature-dependent inhibition was found in spermatozoa from japanese quail and houbara bustard, for which physiological levels of calcium at 40 degrees c had an inhibitory and no effect on sperm motility, respectively. thus, on the basis of this evi ... | 1999 | 10610041 |
| distribution of aromatase activity in the brain and peripheral tissues of passerine and nonpasserine avian species. | many behavioral effects of testosterone on hypothalamic and limbic brain areas are mediated by the action, at the cellular level, of estrogens derived from local testosterone aromatization. aromatase activity and cells containing the aromatase protein and mrna have accordingly been identified in the brain areas involved in the control of behavior. the presence of an unusually high level of aromatase activity has been detected in the telencephalon of one songbird species, the zebra finch (taeniop ... | 2000 | 10620422 |
| a sexual dimorphism in hypothalamic arginine vasotocin (avt) gene expression and avt plasma levels in the japanese quail (coturnix coturnix japonica) in response to water deprivation. | to examine a possible sexual dimorphism in the osmotic control of arginine vasotocin (avt) release in birds, age-matched male and female japanese quail were subjected to water deprivation. the observed increased plasma osmolalities were accompanied by increased plasma avt levels. plasma mesotocin levels did not change with water deprivation. the sensitivity of the osmotic control of avt release as determined by the slope of the relationship between plasma avt levels and plasma osmolalities was s ... | 2000 | 10620429 |
| performance of appetitive or consummatory components of male sexual behavior is mediated by different brain areas: a 2-deoxyglucose autoradiographic study. | the in vivo autoradiographic deoxyglucose method was used to identify the functional brain circuits that are involved in the performance of appetitive and consummatory components of male sexual behavior in japanese quail (coturnix japonica). two groups of castrated, testosterone-treated male quail were trained during 12 sessions to associate the view of a female behind a window with the opportunity to interact freely and to copulate with her. they developed, as a consequence, a social proximity ... | 1999 | 10625066 |
| trans-acting factors that interact with the proximal promoter sequences of ovalbumin gene are tissue-specific and age-related. | aging or deterioration of functions of various organs occurs after adulthood due to alterations in the expression of genes that maintain adulthood functions. molecular changes that occur in regulation of genes in higher organisms after adulthood can be understood by using genes whose timing and rate of expression run parallel with specific functions during the life span. one such function is egg formation in birds which is dependent on the expression of egg protein genes, ovalbumin, lysozyme, vi ... | 1999 | 10630624 |
| comparative fish mapping on z chromosomes of chicken and japanese quail. | using direct r-banding fluorescence in situ hybridization, we assigned five functional genes-growth hormone receptor (ghr), prolactin receptor (prlr), spleen tyrosine kinase (syk), aldolase b (aldob), and muscle skeletal receptor tyrosine kinase (musk)-to the chicken z chromosome. syk and musk were newly localized to the chicken z chromosome in this study. ghr and prlr were situated close to each other on the short arm of the chicken z chromosome, as are their counterparts on human chromosome 5. ... | 1999 | 10640806 |
| locomotion in the quail (coturnix japonica): the kinematics of walking and increasing speed. | hindlimb segmental kinematics and stride characteristics are quantified in several quail locomoting on a treadmill over a six-fold increase in speed. these data are used to describe the kinematics of a walking stride and to identify which limb elements are used to change stride features as speed increases. in quail, the femur does not move during locomotion and the tarsometatarsus-phalangeal joint is a major moving joint; thus, quail have lost the most proximal moving joint and added one distall ... | 2000 | 10658201 |
| the major low molecular weight apolipoprotein from normal and hyperlipidemia atherosclerosis-prone (lap) japanese quail. | the low molecular weight (lmw) apolipoprotein of apo c plays an important role in the metabolism of triglyceride-rich lipoproteins. this study aimed at a characterization of the major lmw apolipoproteins from normal quail strain, and also from lap (hyperlipidemia atherosclerosis-prone) strain to identify its genetic disorder. the major lmw apoprotein cdna clone from normal quail comprised of approximately 500 bp, and encoded polypeptide of 78 amino acid residues containing 57 amino acids as a ma ... | 2000 | 10666566 |
| ultrastructure of spermatozoa from japanese quail. | a monoclonal antibody (mab) to epitopes on mitochondria from turkey spermatozoa cross-reacted with japanese quail spermatozoal mitochondria. however, the pattern of binding was different from that observed for turkey sperm. the ultrastructure of quail spermatozoa was examined to determine the reason for this difference in antibody binding pattern. light microscopy, as well as scanning (sem) and transmission (tem) electron microscopy, were used to study the morphology of spermatozoa from japanese ... | 2000 | 10685894 |
| [thyroid gland development in japanese quail embryos incubating in microgravity]. | the investigation of the progress of thyroid prenatal development in the japanese quail has been first performed in the mir microgravity environment. development of thyroid glands in control and flight embryos was shown to pass same stages (trabecular and follicular). however, the flight embryos demonstrated retarded a development of the gland as compared to the control one. slowing-down of thyroid organogenesis in the flight embryos is evidently related to retardation in formation of their bloo ... | 2000 | 10732191 |
| ultrastructure of spermatozoa from japanese quail. | a monoclonal antibody (mab) to epitopes on mitochondria from turkey spermatozoa cross-reacted with japanese quail spermatozoal mitochondria. however, the pattern of binding was different from that observed for turkey sperm. the ultrastructure of quail spermatozoa was examined to determine the reason for this difference in antibody binding pattern. light microscopy, as well as scanning (sem) and transmission (tem) electron microscopy, were used to study the morphology of spermatozoa from japanese ... | 2000 | 10735210 |
| circadian ovulatory rhythms in japanese quail: role of ocular and extraocular pacemakers. | previous studies have shown that the circadian system of japanese quail is composed of multiple photic inputs and multiple oscillators. among these are extraretinal photoreceptors that mediate both circadian and photoperiodic responses and circadian pacemakers in the eyes that, via neural and hormonal outputs, help to maintain rhythmicity of central circadian clocks (presumably located in the suprachiasmatic area of the hypothalamus). furthermore, a component of the central circadian system is i ... | 2000 | 10762035 |
| plasma 17beta-estradiol levels and ovarian interstitial cell structure in embryonic japanese quail. | plasma concentrations of 17beta-estradiol (e2) and left ovarian histology were investigated by light and electron microscopy in female japanese quail from day 10 of embryonic development through day 7, posthatch. plasma e2 levels remained relatively constant (102 to 140 pg/ml) in the embryo followed by a sharp decrease posthatch (47 to 70 pg/ml). beginning on day 10 of incubation, cells in the medullary portion (medullary cell; mc) of the left ovaries exhibited ultrastructural evidence of steroi ... | 2000 | 10780655 |
| embryonic quail eye development in microgravity. | the us-russian joint quail embryo project was designed to study the effects of microgravity on development of japanese quail embryos incubated aboard mir. for this part of the project, eyes from embryonic days 14 and 16 (e14 and e16) flight embryos were compared with eyes from several groups of ground-based control embryos. measurements were recorded for eye weights; eye, corneal, and scleral ring diameters; and numbers of bones in scleral ossicle rings. transparency of e16 corneas was documente ... | 2000 | 10797121 |
| three-dimensional analysis of dna replication foci: a comparative study on species and cell type in situ. | chromatin morphology of interphase nuclei in most cell lines of quail (coturnix coturnix japonica) and chick (gallus gallus domesticus) embryos shows typical interspecies differences. this intrinsic marker has been used in quail/chick chimerisation experiments, where also differences between cell types were noted. we asked whether similar differences between species and between cell types could be observed in s phase nuclei in situ. in this report, we used bromodeoxyuridine (brdu) pulse labellin ... | 2000 | 10817674 |
| carcase characteristics of a heavy japanese quail line under introgression with the roux gene. | 1. the roux plumage sex-linked recessive gene may be used for early sexing of japanese quail in crossbreeding production systems with wild-type and roux lines. however, associated effects of the gene on carcase and meat composition need to be assessed. 2. quail carcases from pure line k males and females (100% k), a heavy meat line which was used as the recipient line for the introgression of the roux gene, and from same-age roux or wild-type females from the second generation of introgression ( ... | 2000 | 10821521 |
| computation of motion direction by quail retinal ganglion cells that have a nonconcentric receptive field. | one type of retinal ganglion cells prefers object motion in a particular direction. neuronal mechanisms for the computation of motion direction are still unknown. we quantitatively mapped excitatory and inhibitory regions of receptive fields for directionally selective retinal ganglion cells in the japanese quail, and found that the inhibitory regions are displaced about 1-3 deg toward the side where the null sweep starts, relative to the excitatory regions. directional selectivity thus results ... | 2006 | 10824680 |
| foreign gene expression by in vivo gene electroporation in the quail testis. | to investigate whether or not foreign gene expression is attained in the testis of living japanese quails, a firefly luciferase reporter gene was transfected by in vivo electroporation (ep), and transcriptional activity of different promoters was compared. in addition, the effect of the epstein-barr virus self-replication sequence was also tested. the results showed that luciferase activity in the testis reached almost a plateau value at 50 v. under this ep condition, no difference was found in ... | 2000 | 10840640 |
| fos induction in the japanese quail brain after expression of appetitive and consummatory aspects of male sexual behavior. | we investigated the expression of fos, the protein product of the immediate early gene c-fos in the brain of male japanese quail after they engaged in either appetitive or consummatory sexual behavior (i. e., copulation). for 1 h, castrated males treated with testosterone were either allowed to copulate with a female or to exhibit a learned social proximity response indicative of appetitive sexual behavior. control birds were either left in their home cage or placed in the experimental chamber b ... | 2000 | 10856822 |
| 'culture' in quail: social influences on mate choices of female coturnix japonica. | we have shown previously that after a focal female japanese quail, coturnix japonica, sees a conspecific male mating, the focal female's tendency to affiliate and to mate with that male is significantly increased. here we describe two experiments demonstrating that a focal female quail that has seen a conspecific male mating subsequently shows an enhanced tendency to affiliate not only with that particular male, but also with other males that share his characteristics. the results have important ... | 2000 | 10860524 |
| massive accumulation of m and h subunits of neurofilament proteins in spinal motor neurons of neurofilament deficient japanese quail, quv. | quiver (quv) is a non-sense mutation of neurofilament protein l subunit (nf-l) that causes neurofilament deficiency with preserved microtubules in japanese quail. anti-nf-m and anti-nf-h mabs stained cell bodies of motor neurons in quv embryo spinal cords much more intense than those in control spinal cords. volume of motor neurons in quv spinal cords increased to 2.3 times of control motor neurons. immunoblot of quv spinal cords revealed a relative increase in non- and hypo-phosphorylated nf-m ... | 2000 | 10863023 |
| effects of repeated restraint in japanese quail genetically selected for contrasting adrenocortical responses. | behavioral and adrenocortical responses to repeated mechanical restraint were compared in 28-day-old to 31-day-old male japanese quail from two genetic lines divergently selected for reduced (low stress, ls) or exaggerated (high stress, hs) plasma corticosterone (c) responses to brief immobilization. restraint in a metal crush cage for 5 min elicited immobility and silence in all the birds. circulating c levels were considerably higher in quail of both lines following restraint than in the undis ... | 2000 | 10869598 |
| differences between the sexes in direction and duration of response to seeing a potential sex partner mate with another. | we have shown previously that: (1) female japanese quail, coturnix japonica, increase and male japanese quail decrease their tendencies to affiliate with potential sex partners after seeing them mate, and (2) in both sexes of quail, affiliative preferences and choice of a sex partner are highly correlated. here we predict that because effects of a prior male's sperm on a second male's probability of fertilizing a female are relatively brief, a male's avoidance of whichever member of a pair of fe ... | 2000 | 10877903 |
| the effect of short-term fasting on shivering thermogenesis in japanese quail chicks (coturnix coturnix japonica): indications for a significant role of diet-induced/growth related thermogenesis. | (1) the effect of short-term fasting on metabolism and shivering thermogenesis was studied in 9-day-old japanese quail. (2) after 31 h of fasting, heat production decreased 39% and body temperature over 2 degrees c in the thermoneutral zone. the difference in heat production between control and fasting groups decreased with decreasing ambient temperature. (3) despite the lower metabolic rate, the amplitudes of shivering emgs were higher in fasted chicks, especially in pectoralis. this indicates ... | 2000 | 10880870 |
| localization and controls of aromatase in the quail spinal cord. | in adult male and female japanese quail, aromatase-immunoreactive cells were identified in the spinal dorsal horns from the upper cervical segments to the lower caudal area. these immunoreactive cells are located mostly in laminae i-iii, with additional sparse cells being present in the medial part of lamina v and, at the cervical level exclusively, in lamina x around the central canal. radioenzyme assays based on the measurement of tritiated water release confirmed the presence of substantial l ... | 2000 | 10880987 |
| effects of lighting conditions and melatonin supplementation on the cellular and humoral immune responses in japanese quail coturnix coturnix japonica. | two experiments were conducted to determine the effects of lighting conditions and melatonin supplementation on the cellular and humoral immune responses in japanese quail. the first experiment was designed to evaluate differing light regimes as immune modulators in both adult and juvenile quail. the cellular and humoral immune responses were determined for three lighting conditions; short days (8:16ld), long days (16:8ld), and constant light (ll). in the second experiment, melatonin was adminis ... | 2000 | 10882554 |
| growth and muscle characteristics of a growth selected line of japanese quail (coturnix coturnix japonica), a control line and reciprocal crosses between them. | body growth, muscle growth, bone growth, and measurements of muscle fiber area and fiber number were made in a line of japanese quail (coturnix coturnix japonica) selected for high 4 week body weight for 100 generations (line pp), in the control line from which they were derived (line cc), and in genetically equivalent reciprocal crosses (pc and cp) that develop in eggs that differ greatly in weight. there was no difference in body weight or weight of the p. superficialis of newly hatched cc or ... | 2008 | 10885856 |
| long-term egg production and heterosis in quail lines after within-line or reciprocal recurrent selection for high early egg production. | 1. four japanese quail lines were developed using 13 generations of reciprocal recurrent (lines aa and bb) or within-line selection (lines dd and ee) for high egg number until 98 d of age. in these lines and their reciprocal crosses, egg production, egg weight and mortality were monitored for up to 21 months to evaluate the impact of selection method and line origin on long-term production and heterosis. 2. both hen-housed total egg number (en) and hen-day egg laying rate (elr) were consistently ... | 2000 | 10890209 |
| molecular analysis of avian circadian clock genes. | unlike mammals, avian circadian rhythms are regulated by a multiple oscillatory system consisting of the retina, the pineal and the suprachiasmatic nucleus in the hypothalamus. to understand avian circadian system, we have cloned clock and period homologs (qclock, qper2 and qper3) and characterized these genes in japanese quail. overall, qclock, qper2 and qper3 showed approximately 79%, approximately 46% and approximately 33% amino acid identity to mclock, mper2, mper3, respectively. clock was m ... | 2000 | 10891604 |
| ease of capture in lines of japanese quail (coturnix japonica) subjected to contrasting selection for fear or sociability. | japanese quail (coturnix japonica) of lines, which have been subjected to contrasting selection for duration of the tonic immobility (ti) reaction or social reinstatement (sr) behaviour over many generations show corresponding differences in underlying fearfulness and sociality. as fearfulness and sociality are particularly influential traits in domesticated species, the finding that such traits respond to artificial selection may have important implications for poultry welfare and performance. ... | 2000 | 10906397 |
| localisation of epidermal growth factor receptor in the quail ovary. | the present study focuses on the distribution of egfr in the follicular and stromal compartments of the japanese quail (coturnix coturnix japonica) ovary, using immunohistochemical methods and a histological ligand binding assay. egfr was predominantly present in granulosa cells during each stage of the folliculogenesis. furthermore, egfr was also detected in thecal cells and in oocytes. in some cells of the vascular endothelium, of the ovarian smooth muscle, and of the surface epithelium, the p ... | 2000 | 10916168 |
| aspects of the functional morphology of the ductus epididymidis in domestic anseriform and galliform birds. | the structure of the ductus epididymidis, and its capacity to take up luminal particulate material (india ink) were studied, using scanning and transmission electron microscopy, in the domestic fowl, turkey and japanese quail (order galliformes) and drake (order anseriformes). the epithelium appeared contractile and stable structurally, especially in the drake in which, among other cytoskeletal features, abundant perinuclear intermediate filaments radiated peripherally in the principal, noncilia ... | 2000 | 10916881 |
| application of an anti-hqigy antibody for the measurement of igy concentrations of hen's and quail's serum and yolk. | the development of a sensitive elisa for the measurement of quail igy (qigy) was the main purpose of our study. the suitable antibody (ab) was prepared in rabbits. both quail igy (qigy) and hen igy (higy) were precipitated by this developed ab. for this reason it was marked as anti-hen-quail-igy (a-hqigy). the purified ab was conjugated with horseradish peroxidase (ahqigy-hrp) and a sensitive direct elisa was developed, based on this labeled ab. the prepared ahqigy ab which was used in this deve ... | 1999 | 10943656 |
| sequence comparison of avian interferon regulatory factors and identification of the avian cec-32 cell as a quail cell line. | interferon (ifn) regulatory factor-1 (irf-1) is a well-characterized member of the irf family. previously, we have cloned cdna of several members of the chicken irf (chirf) family and studied the function of chirf-1 in the avian cell line cec-32. the irf-1 proteins from primary chicken embryo fibroblasts (cef) and cec-32 cells differed in their electrophoretic mobility. to characterize the different forms of irf-1 in avian cells, we compared the sequences of irf-1 cdna from cec-32 cells, primary ... | 2000 | 10954914 |
| ontogeny of aromatase and tyrosine hydroxylase activity and of aromatase-immunoreactive cells in the preoptic area of male and female japanese quail. | the aromatization of testosterone into oestrogens plays a key role in the control of many behavioural and physiological aspects of reproduction. in the quail preoptic area (poa), aromatase activity and the number of aromatase-immunoreactive (aro-ir) cells are sexually differentiated (males > females). this sex difference is implicated in the control of the sexually dimorphic behavioural response of quail to testosterone. we analysed the ontogenetic development of this sex difference by measuring ... | 2000 | 10971810 |
| characterization and chromosomal distribution of a novel satellite dna sequence of japanese quail (coturnix coturnix japonica). | a novel satellite dna sequence of japanese quail (coturnix coturnix japonica) was isolated from genomic dna digested with restriction endonuclease, bg/ii. sequence analysis of three different-size clones revealed the presence of a tandem array of a gc-rich 41 bp repeated element. this sequence was localized by fluorescence in situ hybridization (fish) primarily to microchromosomes of japanese quail (2n = 78); approximately 50 of the 66 microchromosomes showed positive signals, although hybridiza ... | 2000 | 10994713 |
| evolutionary significance of myosin heavy chain heterogeneity in birds. | this article reviews the complexity, expression, genetics, regulation, function, and evolution of the avian myosin heavy chain (myhc). the majority of pertinent studies thus far published have focussed on domestic chicken and, to a much lesser extent, japanese quail. where possible, information available about wild species has also been incorporated into this review. while studies of additional species might modify current interpretations, existing data suggest that some fundamental properties o ... | 2000 | 10998637 |
| confocal evaluation of native and induced lectin binding contributes to discriminate between lingual gland glycocomponents in quail. | a confocal analysis was performed on the quail (coturnix coturnix japonica) lingual salivary glands where the carbohydrate chains were studied by lectin histochemistry. for this purpose, appropriate fitc- and tritc-conjugates were used for double binding also accomplished with sialidase digestion. the glycosidic components of the quail lingual salivary glands were found to be heterogeneously distributed on the different secretory structures as well as on the single secretory elements of each ade ... | 2000 | 11005236 |
| effect of photoperiod on body weight gain, and daily energy intake and energy expenditure in japanese quail (coturnix c. japonica). | effect of photoperiod and food duration on body weight gain, energy intake, energy expenditure, and sexual development were investigated in two strains of japanese quail (coturnix c. japonica), bred for meat (broilers) or egg production (layers), from 7 to 71 days of age. in a first experiment chicks were subjected to 18l:6d, 15l:9d, 12l:12d, 9l:15d, or 6l:18d, with ad lib food during the light period. in a second experiment birds were exposed to a long photoperiod (18l:6d or 15l:9d) with ad lib ... | 2006 | 11006423 |
| involvement of a midbrain vocal nucleus in the production of both the acoustic and postural components of crowing behavior in japanese quail. | many bird species produce vocalizations which are accompanied by distinctive postural displays, but the neural mechanisms that allow such integrated production of vocal and postural motor patterns are not understood. in the crowing behavior of japanese quail, a characteristic vocal pattern is accompanied by and coordinated with a postural display that consists of a sequence of rapid, patterned head movements. the purpose of the present study was to investigate the role of a midbrain vocal nucleu ... | 2014 | 11016790 |
| transactivation of latent marek's disease herpesvirus genes in qt35, a quail fibroblast cell line, by herpesvirus of turkeys. | the qt35 cell line was established from a methylcholanthrene-induced tumor in japanese quail (coturnix coturnix japonica) (c. moscovici, m. g. moscovici, h. jimenez, m. m. lai, m. j. hayman, and p. k. vogt, cell 11:95-103, 1977). two independently maintained sublines of qt35 were found to be positive for marek's disease virus (mdv)-like genes by southern blotting and pcr assays. sequence analysis of fragments of the icp4, icp22, icp27, vp16, meq, pp14, pp38, open reading frame (orf) l1, and glyc ... | 2000 | 11024146 |
| [the electrical activity of the hypothalamic arcuate nucleus and the morphofunctional characteristics of the gonads in birds during blockade and stimulation of the beta-adrenergic receptors]. | beta-adrenoreceptors agonist isadrine as shown by measurement of hypothalamic arcuate nucleus (an) summary electrical activity and by morphometry of its neurons and testis does not result in significant acceleration of maturation in maturing (4-6 week old) male japanese quails (coturnix coturnix japonica). anapryline-induced blockade of beta-adrenoreceptors leads to small inhibiting of the reproductive complex. this findings confirm our previous works, according to which brain beta-adrenergic sy ... | 2000 | 11059385 |
| evidence of social effects on mate choice in vertebrates. | study of determinants of mate selection by animals has a long history in evolutionary biology and behavioural ecology. however, only during the past decade have investigators begun to conduct experiments exploring the various ways in which observation of the behaviour of others might influence mate selection. here, we review both field and laboratory studies of behavioural processes that underlie non-independence in mate choice, discussing both direct and indirect social influences on mate selec ... | 2000 | 11074319 |
| validation of the doubly labeled water method in japanese quail coturnix c. japonica chicks: is there an effect of growth rate? | the doubly labeled water (dlw) method was validated against respiration gas analysis in growing japanese quail chicks (between 1 week and 3 weeks of age) as well as in birds after having achieved sexual maturity (7 weeks of age). a comparison was made between a strain selected for high growth rates (p-strain, n = 18), and a non-selected strain (c-strain, n = 18). relative growth rates of individual chicks during the measurement ranged from -13.8% day(-1) to 23.1% day(-1). when employing a single ... | 2000 | 11083518 |
| developmental origin of avian merkel cells. | we have investigated the developmental origin and ultrastructure of avian merkel cells by electron microscopy and chick/quail transplantation experiments. on embryonic day 3, chick leg primordia were homotopically grafted onto japanese quail host embryo. fourteen days later, quail cells that had migrated into grafted chick legs were identified according to the masses of heterochromatin associated with the nucleolus that are characteristic for quail. both in chick and quail, merkel cells are usua ... | 2000 | 11089931 |
| retinoic acid accelerates the development of reproductive organs and egg production in japanese quail (coturnix coturnix japonica). | the effects of retinoic acid on the development of reproductive organs and egg production in female japanese quail (coturnix coturnix japonica) were investigated. female quail were fed a diet containing retinoic acid at 4 mg/kg (ra) or two diets containing retinyl acetate at 5000 iu/kg (va1) or 14 000 iu/kg (va2) after being fed a vitamin a-free diet for 2 wk (experiment 1). the oviduct and ovary grew more rapidly (p < 0.05) in ra-treated quail than in va-treated quail at 5 wk of age. in additio ... | 2000 | 11090451 |
| ecological risk assessment of endocrine disruptors. | the european centre for ecotoxicology and toxicology of chemicals proposes a tiered approach for the ecological risk assessment of endocrine disruptors, integrating exposure and hazard (effects) characterization. exposure assessment for endocrine disruptors should direct specific tests for wildlife species, placing hazard data into a risk assessment context. supplementing the suite of mammalian screens now under organization for economic cooperation and development (oecd) validation, high priori ... | 2000 | 11102288 |
| existence of galanin in lumbosacral sympathetic ganglionic neurons that project to the quail uterine oviduct. | oviposition in birds is conducted by vigorous contractions of the uterine oviduct. we recently isolated an oviposition-inducing peptide that was identified as avian galanin from mature quail oviducts. this peptide was localized in neuronal fibers terminating in muscle layers in the uterine oviduct and evoked vigorous uterine contractions through binding to receptors located in the uterus. however, no cell bodies that express avian galanin were detected in the uterus or other oviduct regions. to ... | 2000 | 11108248 |
| dopamine d(2)-like receptor binding in the brain of male japanese quail (coturnix japonica). | japanese quail (coturnix japonica) have been used extensively to study appetitive behaviors. however, little is known about the appetitive-relevant neurochemical systems in this species. the present investigation examined the distribution of d(2)-like dopamine receptors in the quail brain. [(3)h]spiperone was incubated in brain tissue homogenates and non-specific binding was defined using (-)-sulpiride. scatchard analysis of whole brain without cerebellum and forebrain alone indicated approximat ... | 2000 | 11108985 |
| rapid and reversible inhibition of brain aromatase activity. | many actions of androgens require their conversion via the enzyme aromatase into oestrogens. changes in brain aromatase activity are thought to take place via changes in enzyme concentration mediated by effects of sex steroids on aromatase transcription. these changes are relatively slow which fits in well with the fact that oestrogens are generally viewed as slow-acting messengers that act via changes in gene transcription. more recently, fast actions of oestrogens, presumably at the level of t ... | 2001 | 11123516 |
| ontogeny of the ultradian rhythm of activity in japanese quail. | as soon as they hatch, gallinaceous chicks follow broody hens. this matriarchal unit presents a temporal organization of activity. the ontogeny of this ultradian rhythm of activity was followed in japanese quail during their first 3 weeks of life. under controlled laboratory conditions, 12 groups of four chicks were recorded using an activity monitoring system. they were observed between the ages of 2 and 17 days. chicks in groups presented an ultradian rhythm of activity, with a period that inc ... | 2000 | 11128293 |
| does cold acclimation induce nonshivering thermogenesis in juvenile birds? experiments with pekin ducklings and japanese quail chicks. | the capability to produce heat in cold by nonshivering thermogenesis (nst) was studied in pekin ducklings and japanese quail chicks acclimated to cold for 3 weeks using indirect calorimetry (oxygen consumption) and electromyography from breast (m. pectoralis) and leg muscles (quails: m. gastrocnemius; ducklings: m. gastrocnemius, m. iliofibularis). respiration of muscles in vitro was studied by measuring cytochrome c oxidase activity. in both species, cold acclimation induced clear morphometric ... | 2000 | 11128444 |
| ultrastructural study of the luminal surface of the ducts of the epididymis of gallinaceous birds. | the various ducts of the epididymides of four gallinaceous birds, the turkey (meleagris gallopavo), domestic fowl (gallus gallus), guinea-fowl (numida meleagris) and japanese quail (coturnix coturnix japonica) were studied at the scanning and transmission electron microscopy levels. the tissues were fixed either by immersion or vascular perfusion, for comparative purposes. each duct system, save for a few details, presented similar morphological features in all species. the epithelial surface of ... | 2000 | 11131120 |
| cloning of complementary deoxyribonucleic acids encoding quail (coturnix coturnix japonica) retinoic acid receptor ss isoforms and changes in their gene expression during gonadotropic growth. | retinoids have important effects on the development of the reproductive system, where they act via their specific nuclear receptors: retinoic acid receptors (raralpha, ss, gamma) and retinoid x receptors (rxralpha, ss, gamma). the research reported here was conducted in an effort to clone quail rarbeta+ cdna (qrarbeta) and to evaluate the expression of qrarbeta+ mrnas in different tissues and during the development of gonadotropic organs. two complete cdnas of qrarbeta1 and qrarbeta2 were isolat ... | 2001 | 11133679 |
| effects of testosterone on production of perivitelline membrane glycoprotein zpc by granulosa cells of japanese quail (coturnix japonica). | avian perivitelline membrane, an investment homologous to the zona pellucida of mammalian oocytes, is composed of at least two glycoproteins. previous studies have indicated that one of the components, a glycoprotein homologous to mammalian zpc, is produced and secreted by the granulosa cells of developing follicles of the chicken ovary. in the present study, we evaluated the expression and regulation of zpc in japanese quail (coturnix japonica) granulosa cells both in vivo and in vitro. western ... | 2001 | 11133688 |
| day length has a major effect on the response of protein synthesis rates to feeding in growing japanese quail. | we investigated the effect of day length on mixed protein fractional synthesis rates (k(s)) in 14- and 21-d-old japanese quail (coturnix c. japonica) habituated to either a long day length, 18 h light/6 h dark (ldl), or short day length, 6 h light/18 h dark (sdl), with free access to food during the light period. rates of protein synthesis were measured by a flooding dose of l-[1-(13)c]leucine. in both groups, we measured k(s) of pectoral muscle, liver and heart after an overnight period of food ... | 2001 | 11160545 |
| effect of melatonin on circadian rhythm, locomotor activity and body temperature in the intact house sparrow, japanese quail and owl. | we compared the effect of melatonin on circadian rhythm, body temperature, and locomotion in the intact house sparrow, japanese quail and owl. daily treatment with melatonin at a fixed time did not entrain the free-running rhythm of locomotor activity in the house sparrow and the disrupted rhythm in japanese quail under constant dim light. however, melatonin clearly inhibited movement for several hours after treatment. the duration of resting after injection of melatonin was dose-dependent. body ... | 2001 | 11166707 |
| developmental instability in japanese quail genetically selected for contrasting adrenocortical responsiveness. | differences in developmental instability were assessed with japanese quail of two lines that had been genetically selected over several generations for reduced (low stress, ls) or exaggerated (high stress, hs) plasma corticosterone response to brief mechanical restraint. at 32 wk of age, three bilateral traits were selected for study in each quail line. the characteristics chosen were length of the metatarsus (shank length, shl), diameter of the shank (shd) perpendicular to the spur, and distanc ... | 2000 | 11194031 |
| genetic analyses of plumage color mutations on the z chromosome of japanese quail. | genetic analyses were performed with four sex-linked plumage color mutations (roux, brown, imperfect albino, and cinnamon) in japanese quail (coturnix japonica). roux and brown quail have similar plumage color, but plumage of roux quail is paler. pure, f1 and f2 matings were carried out with roux and brown stocks, and 357, 338, and 273 progeny with either roux or brown plumage color were obtained from each mating type, respectively. these allelism tests showed that mutations for roux and brown c ... | 2000 | 11218091 |
| fifty microsatellite markers for japanese quail. | a japanese quail genomic library enriched for (ca/gt)n simple sequence repeats was screened and positive clones were sequenced. fifty original microsatellite sequences were isolated that consisted mainly of perfect repeats of the dinucleotide (ca/gt)n motif and a corresponding number of polymerase chain reaction (pcr) primer pairs complementary to unique dna sequences flanking the microsatellite repeats were designed to detect the repeats. forty-six percent (23 of 50) of the markers revealed pol ... | 2000 | 11218092 |