Publications
| Title | Abstract | Year Filter | PMID(sorted ascending) Filter |
|---|
| the effect of divergent selection for total plasma phosphorus in japanese quail on fearfulness and selected blood and heart parameters. | a selection experiment utilizing japanese quail was initiated to study the genetic relationship of growth and reproduction traits. in this study, lines were selected for increased (hp line) and decreased (lp line) total plasma phosphorus at the beginning of lay. the hp and lp lines were derived from a randombred control population (r1 line) that was maintained with the selected lines to remove environmental variation over generations. during the course of selection, it was observed that blood fr ... | 1998 | 9469745 |
| hereditary multiple malformation in japanese quail: a possible powerful animal model for morphogenetic studies. | hereditary multiple malformation (hmm), a new mutation of japanese quail (coturnix japonica), is controlled by an autosomal recessive gene. the proposed gene symbol for the mutant gene is hmm. the majority of the homozygotes die at the sixth day of incubation, and the remainder die at various stages by 15 days of incubation. the homozygotes surviving to the late embryonic stage have greatly shortened lower and upper beaks that are set apart and show an early embryo-like body shape, with feather ... | 2006 | 9487677 |
| influence of dietary cholesterol and fat source on atherosclerosis in the japanese quail (coturnix japonica). | the japanese quail has been used as a model of human atherosclerosis to investigate the mechanisms underlying the development of vascular lesions, i.e. hyperlipoproteinaemia and impaired endogenous antioxidant status. in the present study, japanese quail were fed on semi-purified diets containing butter, beef tallow or soyabean-oil blends, with either 0.5 or 5 g cholesterol/kg for 9 weeks to examine the effects of dietary fat blends varying in fatty acid composition and cholesterol intake on pla ... | 1997 | 9497448 |
| purification and characterization of neutral alpha-mannosidase from hen oviduct: studies on the activation mechanism of co2+. | neutral alpha-mannosidase was purified to homogeneity from hen oviduct. the molecular mass of the enzyme was 480 kda on gel filtration, and the 110-kda band on sds-page in the presence of 2-mercaptoethanol indicated that it is composed of four subunits. the activated enzyme hydrolyzed both p-nitrophenyl alpha-d-mannoside and high mannose-type sugar chains. this substrate specificity is almost the same as that reported for the neutral a-mannosidase from japanese quail oviduct [oku and hase (1991) ... | 1997 | 9498562 |
| in vivo microdialysis studies of pineal and ocular melatonin rhythms in birds. | pineal and retinal melatonin has an important role in the control of avian circadian rhythms. in order to study the mechanisms of circadian rhythms of melatonin synthesis in the pineal and in the eye, in vivo microdialysis was applied to these organs. in both pigeons and japanese quails, pineal and ocular melatonin levels were high during the dark and low during the day under light-dark (ld) cycles. these rhythms persisted under constant dim light (lldim) conditions indicating the circadian natu ... | 2013 | 9500661 |
| ossification and growth rates of the limb long bones during the prehatching period in the quail (coturnix coturnix japonica). | the timing of ossification and the growth of six long bones of the prehatching period in the quail was studied. ninety-nine quail eggs were incubated and in total nine fetuses were selected daily from the sixth to the sixteenth day of incubation. the fetuses were stained with alizarine and alcian blue double colouration. the fetuses were studied under the stereoscopic microscope and linear measurements were obtained from the humerus, ulna, radius, femur, tibia and fibula. the first appearance of ... | 1998 | 9505448 |
| melatonin supplementation does not prevent photostimulatory effects of night interruption lighting in japanese quail. | male japanese quail (coturnix japonica) exposed to night interruption lighting were given melatonin either as single daily injections (10-100 mg/kg), or as continuous release implants. birds were exposed to a base photoperiod of 8 hr of light, plus a 15 min night interruption pulse of light 14 hr after the beginning of the base photoperiod. daily injections of melatonin were given 20 min prior to the night interruption pulse. control birds either received no exogenous melatonin or received injec ... | 1998 | 9510435 |
| responses in growth, food intake and food conversion efficiency to different dietary protein concentrations in meat-type lines of japanese quail. | 1. a total of 360 japanese quail of 4 commercial meat-type lines and two diet treatments (260 and 216 g/kg or 238 and 195 g/kg of crude protein (cp) in the starter and grower diet, respectively) were used. 2. the positive effect of a high cp diet on body weight was significant only for the first 4 weeks after hatching. 3. the mean age at inflection point of the growth curve (t+) across lines and sexes was 1.4 d (0.6 to 2.8 d within line/sex groups) earlier for quail fed on a high cp diet than in ... | 1997 | 9511002 |
| diet selection by japanese quail (coturnix coturnix japonica) in relation to ambient temperature and metabolic rate. | 1. a choice between a high-energy, wheat-based, low protein mixture and a lower-energy, soya-based, high protein mixture offered to growing japanese quail at ambient temperatures of 20 degrees, 25 degrees, 30 degrees and 35 degrees c. 2. the quail were kept in open-circuit respiration calorimeters, so that diet selection could be related to energy requirement. 3. increasing ambient temperature had no significant effect on food intake by weight, but the proportion of the high energy choice decrea ... | 1997 | 9511005 |
| mate-choice copying in japanese quail, coturnix coturnix japonica | we performed four experiments to examine effects on the mate choices of female japanese quail, coturnix coturnix japonica, of observing a male mate with another female. each experiment was conducted in three phases: (1) a pre-test during which subject females were allowed to choose between two males with which to affiliate; (2) an observation phase, in which subject females either watched or did not watch the male they had spent less time near during the pre-test (their 'non-preferred' male) cop ... | 1998 | 9514666 |
| systemic and intracerebroventricular injections of vasotocin inhibit appetitive and consummatory components of male sexual behavior in japanese quail. | the authors investigated the behavioral actions of vasotocin (vt) in castrated testosterone-treated male japanese quail. the appetitive and consummatory components of sexual behavior as well as the occurrence frequency of crows were inhibited, in a dose-dependent manner, by injections of vt. the authors observed opposite effects after injection of the v1 receptor antagonist, dptyr(me)avp. lower doses of vt were more active after central than after systemic injection, and effects of systemic inje ... | 1998 | 9517831 |
| anatomical relationships between aromatase and tyrosine hydroxylase in the quail brain: double-label immunocytochemical studies. | the activation of male sexual behavior in japanese quail (coturnix japonica) requires the transformation of testosterone to 17beta-estradiol by the enzyme aromatase (estrogen synthetase). there are prominent sex differences in aromatase activity that may be regulated in part by sex differences in catecholaminergic activity. in this study, we investigate, with double-label immunocytochemistry methods, the anatomical relationship between the catecholamine synthesizing enzyme, tyrosine hydroxylase ... | 1998 | 9518270 |
| systemic amyloidosis in laying japanese quail. | systemic amyloidosis was seen in laying japanese quail in a flock of a farm rearing 95,000 birds. the clinical signs included decreased egg production, anorexia, white diarrhea, and subcutaneous abscesses of the head. histologically, amyloid deposited predominantly in the spleen and liver. in addition, there were lesser degrees of amyloidosis in other organs (pancreas, kidney, heart, lung, gastrointestinal tract). amyloid stained positively with congo red and thioflavin t. immunohistochemically, ... | 2006 | 9533104 |
| vitamin a uptake cells in the endocrine organs of japanese quails, coturnix coturnix japonica. | the vitamin a uptake cells in the anterior pituitary, thyroid gland, and pancreas of japanese quails, coturnix coturnix japonica, were examined by the use of sudan iii staining, toluidine blue staining, fluorescence microscopy and electron microscopy. after excess vitamin a administration, most of interstitial cells, corresponding to fibroblasts, increased markedly the size and number of lipid droplets in the cytoplasm which emitted vitamin a fluorescence intensively. the reactions to vitamin a ... | 1997 | 9538560 |
| molecular cloning of acid alpha-glucosidase cdna of japanese quail (coturnix coturnix japonica) and the lack of its mrna in acid maltase deficient quails. | acid alpha-glucosidase (gaa) hydrolyzes alpha-1, 4 and alpha-1, 6 glucosidic linkages of oligosaccharides and degrades glycogen in the lysosomes. the full-length gaa i cdna, pqam8, was isolated from a cdna library derived from japanese quail liver. the cdna is 3569 base pairs long and has an open reading frame capable of coding 932 amino acids. the deduced amino acid sequence shares 52% identity with human gaa. transfection of expression vector petam8 into cos-7 cells or acid maltase deficient ( ... | 1997 | 9540858 |
| short beak: a new autosomal recessive semilethal mutation in japanese quail. | short break (sbk) is a new semilethal mutation of japanese quail (coturnix japonica). the sbk individuals are characterized externally by short breaks, shanks, and digits. the shank is also thicker than the wild type. the shape of the mutant beak does not show a parrotlike appearance, contrasting with that of other poultry chondrodystrophic mutants reported in the literature. bones in the fore and hind limbs of the sbk mutant are also shorter than the wild types. the humerus and ulna in the wing ... | 2003 | 9542163 |
| the structure of the interstitial tissue of the active and resting avian testis. | the interstitial tissue of the testis was studied in gonadally active and gonadally inactive domestic fowl (gallus gallus domesticus), guinea-fowl (numida meleagris), duck (anas platyrhynchos) and japanese quail (coturnix coturnix japonica). gonadal inactivity in the fowl was induced by a single subcutaneous injection of 50 mg oestradiol benzoate. the structure of this tissue was similar in all the birds studied. lymphatic vessels were mostly thin and meandered between the peritubular tissue per ... | 1997 | 9551481 |
| role of the archistriatal nucleus taeniae in the sexual behavior of male japanese quail (coturnix japonica): a comparison of function with the medial nucleus of the amygdala in mammals. | nucleus taeniae (tn) is a prominent cell group within the medial archistriatum of birds. based upon similarities in sex-steroid binding sites, this nucleus has been hypothesized to be homologous to the medial nucleus of the amygdala (me) in mammals, which is known to modulate the expression of sexual behavior in rodents. we therefore tested whether or not tn likewise plays a role in the expression of sexual behavior in male japanese quail. we found that bilateral damage to tn produced deficits i ... | 1998 | 9553694 |
| francolin phylogenetics: molecular, morphobehavioral, and combined evidence. | the phylogenetics of francolins (francolinus species) were reassessed by obtaining 660 bp of sequence of the mitochondrial dna (mtdna) cytochrome b gene from 20 species, the common quail coturnix coturnix africana, and the madagascar partridge margaroperdix madagarensis. published sequences of the japanese quail c. c. japonica, alectoris partridges, and the junglefowl gallus gallus were also included. separate analysis of the 200 phylogenetically informative cytochrome b characters and the 25 in ... | 1998 | 9562983 |
| changes in distribution of glycosaminoglycans during the progression of cholesterol induced atherosclerosis in japanese quail. | the temporal and spatial distribution and relative concentration of the proteoglycan glycosaminoglycan component were studied during the progression of atherosclerosis in the systemic arteries of japanese quail selected for cholesterol induced atherosclerosis (cia). the cia quail were placed on either control or 0.5% added cholesterol diets at 3 months of age. the major systemic arteries (dorsal aorta, right and left brachiocephalic) were collected at 1- or 2-week intervals over the 10-week peri ... | 1998 | 9568737 |
| early embryonic interaction of retinal pigment epithelium and mesenchymal tissue induces conversion of pigment epithelium to neural retinal fate in the silver mutation of the japanese quail. | the neural retina and retinal pigment epithelium (rpe) diverge from the optic vesicle during early embryonic development. they originate from different portions of the optic vesicle, the more distal part developing as the neural retina and the proximal part as rpe. as the distal part appears to make contact with the epidermis and the proximal part faces mesenchymal tissues, these two portions would encounter different environmental signals. in the present study, an attempt has been made to inves ... | 1998 | 9572359 |
| spontaneous transdifferentiation of quail pigmented epithelial cell is accompanied by a mutation in the mitf gene. | an ectopic neural retina is formed at the outer layer of the retina in the silver homozygote (b/b) of the japanese quail. in situ hybridization and immunohistochemical analysis revealed that cells in the outer layer of retina first expressed a pigment-cell-specific gene, mmp115, and then began to express a neural marker in b/b embryos, indicating that the ectopic neural retina is formed via transdifferentiation of differentiated pigmented epithelial cells (pecs). an in vitro study revealed that ... | 1998 | 9576828 |
| coxiellosis in domestic and wild birds from japan. | serological evidence of infection with coxiella burnetii was found in 41 (2%) of 1,951 domestic birds and in 167 (19%) of 863 wild birds from 17 and 5 prefectures in japan, respectively, by microagglutination (ma) test. the bacteriological evidence of the infection was found in 17 (41%) of 41 domestic birds and 37 (22%) of 167 wild birds by the nested polymerase chain reaction (pcr). in addition, c. burnetii was isolated from five each of serum, spleen and fecal specimens from five jungle crows ... | 1998 | 9577778 |
| glutathione depletion by xenobiotics in coturnix coturnix japonica. | 1998 | 9606269 | |
| [elaboration of live measles vaccine technology on human embryo lung diploid cell culture l-68]. | measles predominates among childhood droplet infections in many countries. immunization of all human beings sensitive to this infection is the only radical measure in controlling measles. the quality of a vaccine is primarily determined by the properties of the virus strains and cell cultures and technology of production. now live measles vaccine is produced in or country on the basis of fibroblasts from japanese quail embryo. the production of live measles vaccine in the primary cell cultures h ... | 1998 | 9608273 |
| circadian rhythms of rod-cone dominance in the japanese quail retina. | when the japanese quail is held in constant darkness, retinal responses (erg b-waves) increase during the animal's subjective night and decrease during its subjective day. rod photoreceptors dominate the b-wave responses (lambdamax = 506 nm) to all stimulus intensities at night but only to those intensities below the cone threshold during the day. above the cone threshold, cones dominate b-wave responses (lambdamax, approximately 550-600 nm) during the day regardless of the state of retinal adap ... | 1998 | 9614251 |
| molecular cloning of quail thyroid-stimulating hormone (tsh) beta subunit. | thyroid-stimulating hormone (tsh) beta subunit cdna was obtained from japanese quail (coturnix japonica) by pcr and its nucleotide sequence was determined. the cdna encodes a putative signal peptide and a mature protein consisting of 20 and 114 amino acids, respectively. the amino acid sequence of quail tshbeta subunit shows homologies of 67-69% in mammalian species, 58% in amphibian and 43-49% in teleost fish. comparison of the amino acid sequence with tshbeta subunits of other species reveals ... | 1997 | 9622299 |
| active immunization of japanese quail hens with a recombinant chicken inhibin fusion protein enhances production performance. | the effects of active immunization against inhibin on production performance in female japanese quail (coturnix coturnix japonica) were assessed in two separate trials using an mbp-cina521 fusion protein as an immunogen. the fusion protein, mbp-cina521, consisted of the bacterial maltose binding protein (mbp) and a truncated form of the mature alpha-subunit of chicken inhibin (cina521). mbp-cina1521 was constructed by: 1) excising a 521-bp psti fragment from a chicken inhibin alpha-subunit cdna ... | 1998 | 9628541 |
| anatomical and neurochemical definition of the nucleus of the stria terminalis in japanese quail (coturnix japonica). | this study in birds provides anatomical, immunohistochemical, and hodological data on a prosencephalic region in which the nomenclature is still a matter of discussion. in quail, this region is located just dorsal to the anterior commissure and extends from the level of the medial part of the preoptic area at its most rostral end to the caudal aspects of the nucleus preopticus medialis. at this caudal level, it reaches its maximal elongation and extends from the ventral tip of the lateral ventri ... | 1998 | 9634138 |
| cellular localization of neuropeptide y mrna and peptide in the brain of the japanese quail and domestic chicken. | neuropeptide y (npy) has been implicated in the control of a number of physiological functions in birds including food intake and reproduction. in the present study, sites of npy synthesis were localized in the brains of japanese quail and domestic chickens by in situ hybridization histochemistry using a digoxigenin-labelled riboprobe. npy mrna was detected in three main cell groups in both species. the most prominent group was associated with structures in the lateral thalamus including the ant ... | 1998 | 9634595 |
| multiple forms of gnrh are released from perifused medial basal hypothalamic/preoptic area (mbh/poa) explants in birds. | both chicken gonadotropin-releasing hormones i and ii (cgnrh i and ii) were detected in abundant quantity by radioimmunoassay of extracts of japanese quail medial basal hypothalamic/preoptic area (mbh/poa) fragments that included the median eminence (me) region. however, in radioimmunoassayed extracts of japanese quail me alone, the concentration of cgnrh i greatly exceeded that of cgnrh ii (approximately 450 pg/me vs < 10 pg/me). likewise, cgnrh i and ii were released into perifusates from quai ... | 1998 | 9653026 |
| circadian rhythm of activity in japanese quail in constant darkness: variability of clarity and possibility of selection. | in conditions of constant darkness, interindividual variability in the clarity of circadian rhythmicity was observed in sexually immature young quail, with birds classified as more or less rhythmic or arrhythmic. the relative clarity of this circadian rhythm was observed on the actograms by measurement of the autocorrelation coefficient ratio over 12 cycles. autocorrelation coefficients were calculated from sequential series of total activity over 12-minute periods. crosses of selected phenotype ... | 1998 | 9653576 |
| distribution of allelic forms of erythrocyte h1 histones in japanese quail populations divergently selected for amount of weight loss after transient starvation. | three polymorphic subtypes of erythrocyte histone h1 (h1.a, h1.b, and h1.z) were analyzed using a sodium dodecyl sulfate polyacrylamide gel in quail populations divergently selected for a high (line 1) or low (line 2) reduction in body mass following temporary food withdrawal. both h1.b and h1.z histone alleles were found to be differently distributed in these populations during the selection period. the frequency of b1 in line 2 was approximately 1.9-2.8 times lower than in line 1 and approache ... | 1998 | 9673772 |
| genes for polymorphic h1 histones are linked in the japanese quail genome. | in a previous report (pałyga, j., biochem. genet. 29, 431-445, 1991), three subtypes of erythrocyte histone h1 were found to vary in a japanese quail population. while h1.b and h1.z histones were each represented by two electromorphs differing in apparent molecular weights, a polymorphism of histone h1.a was connected with a lack of this protein in some birds. as a genetic basis for this variability was demonstrated only in h1.b, here genetic data are provided which indicate that both h1.a and h ... | 1998 | 9673773 |
| effects of the neurotoxin 3-acetylpyridine on levels of soluble proteins and enzyme activities in various tissues of japanese quail. | (1) the effects of the neurotoxin 3-acetylpyridine on the levels of soluble proteins and enzyme activities in various tissues of japanese quail were investigated. (2) sds-polyacrylamide gel electrophoresis showed that in the brain the soluble proteins with a molecular mass corresponding to 18 kda were increased in quail treated with this toxin. the soluble liver proteins with the largest molecular masses (200, 120, 98, 80.5 and 58 kda) were either missing or present at lower concentrations in th ... | 1998 | 9675882 |
| the foam production system of the male japanese quail: characterization of structure and function. | the research described here characterizes a unique neuromuscular system involved in reproductive behavior--the foam production system of the male japanese quail (coturnix japonica). male quail produce a large amount of foam that is transferred to the female during copulation, enhancing male fertilization success. the source is the foam gland complex, a large sexually dimorphic, androgen sensitive, external protuberance of the dorsal cloaca, consisting of glandular units interdigitated with stria ... | 1998 | 9681161 |
| furazolidone toxicosis in female japanese quail (coturnix coturnix japonica): pathomorphological changes in reproductive tract and reversibility of the induced changes. | female japanese quail (coturnix coturnix japonica) placed in 3 equal groups were given 600, 400 or 0 mg furazolidone (fz)/kg feed for 4 w and then withdrawn for another 4 w. another (pair-fed) group of same size was given basal feed as much as was consumed by the quail fed 600 mg fz/kg feed. fz feeding decreased body weight, feed intake and egg production. ovaries of the fz-fed quail decreased in weight and size and were studded with small follicles. magnum, isthmus and uterus in fz-fed groups h ... | 1998 | 9682406 |
| long-range competition among the neurons projecting centrifugally to the quail retina. | birds have a well-developed centrifugal pathway from the isthmo-optic nucleus to the retina. in the present study, receptive-field properties of the isthmo-optic (io) neurons and suppressive effect of remote stimuli far beyond the "classical" receptive fields were examined electrophysiologically in the japanese quail. receptive fields emitting more than half the maximal on-off response to a small spot of light measured 4.3+/-1.9 deg (n = 37) in diameter. a stationary spot of light was presented ... | 1998 | 9685195 |
| aggressive pecking by males in breeding groups of japanese quail (coturnix japonica). | 1. head injuries caused by aggressive pecking are an important welfare problem in quail farming. the aim of experiments one to three was to reduce the rate of aggressive pecking in breeder groups. 2. the quails were housed in pens containing litter, nest boxes and a dustbathing box. the experimental groups consisted of 2/14, 3/14, 5/15 or 5/35 (males/hens) quails which were introduced into the experimental pens at the age of 4, 6 or 7 weeks. 3. none of the 5 factors that varied between the pens ... | 1998 | 9693812 |
| meat quality traits and muscle characteristics in high or low fear lines of japanese quails (coturnix japonica) subjected to acute stress. | 1. the influence of acute stress before slaughter on muscle and meat quality was studied in adult male quail from lines divergently selected for long (lti) or short (sti) duration of tonic immobility (ti) and from the unselected (c) control line. 2. when subjected to acute stress, birds from the long ti line responded differently to those of the control or the low fear lines. lti birds exhibited: a higher plasma creatine kinase and a smaller increase in plasma corticosterone levels, a higher phu ... | 1998 | 9693818 |
| adenovirus-mediated transfer of human acid maltase gene reduces glycogen accumulation in skeletal muscle of japanese quail with acid maltase deficiency. | acid maltase deficiency (amd) causes a lysosomal glycogenosis inherited as an autosomal recessive trait. the infantile type of amd (pompe disease) leads to early death due to severe dysfunction of cardiac and respiratory muscles and no effective therapy is available. replication-defective adenovirus vectors offer a promising tool for in vivo gene delivery and gene therapy. we constructed a recombinant adenovirus containing the human acid maltase (am) cdna downstream of the cag promoter, composed ... | 1998 | 9694159 |
| appetitive and consummatory male sexual behavior in japanese quail are differentially regulated by subregions of the preoptic medial nucleus. | central testosterone aromatization is required for the activation of both appetitive (asb) and consummatory (csb) male sexual behavior in japanese quail. there are two major clusters of aromatase immunoreactive (aro-ir) cells in the rostral forebrain; these outline the nucleus preopticus medialis (pom) and the nucleus striae terminalis (bst). we investigated the role of these nuclei in the regulation of asb and csb. appetitive male sexual behavior was measured with the use of a learned social pr ... | 1998 | 9698339 |
| clench: a new autosomal recessive mutation in japanese quail. | the clench (cl) is a new morphological mutation in japanese quail (coturnix japonica). the cl mutants rigidly clench their toes in both legs, which gives rise to a human fistlike appearance in the distal ends of the legs. other parts of the cl body are quite normal. in spite of the severe toe abnormality, the cl mutants are normal in fertility, hatchability, and postnatal viability. genetic analysis revealed that the cl mutation is an autosomal recessive with 100% penetrance. the proposed gene s ... | 1998 | 9703690 |
| tr4 orphan receptor crosstalks to chicken ovalbumin upstream protein-transcription factor and thyroid hormone receptor to induce the transcriptional activity of the human immunodeficiency virus type 1 long-terminal repeat. | here we investigate the roles of human testicular orphan receptors, tr2 and tr4, on the gene regulation of the long-terminal repeat of the human immunodeficiency virus type 1 (hiv-ltr). in gel-retardation assays, a palindromic element at the 5'-end of hiv-ltr,5'-aggggtcagatatccactgaccttt-3',showed high affinity to tr2 and tr4 with an equilibrium dissociation constant (kd) of 1.11 +/- 0.48 (n = 3) and 0.52 +/- 0.12 nm (n = 3), respectively. interestingly, each half-site of the palindromic element ... | 1998 | 9704574 |
| cloning of complementary deoxyribonucleic acid for the follicle-stimulating hormone-beta subunit in the japanese quail. | complementary dna clones encoding the luteinizing hormone-beta and common alpha subunits have been isolated not only in mammals but also in some nonmammalian tetrapod vertebrates. however, cloning of cdna encoding the follicle-stimulating hormone (fsh)-beta subunit is limited to mammals, and no clone for the fsh-beta subunit has been isolated for nonmammalian vertebrates. we report here the isolation and characterization of cdna encoding the fsh-beta subunit precursor molecule in the japanese qu ... | 1998 | 9707483 |
| influence of dietary aflatoxin on the severity of coccidial infection in quails. | one hundred-sixty one day old japanese quail-chicks were divided into four groups and kept for 6 weeks. the first group was kept as control. group 2 received 1 ppm of dietary aflatoxin from day zero of chick life till the end of experiment. group 3 was inoculated with 5 x 10(4) sporulated oocysts of eimeria alone. quail-chicks of group 4 were inoculated with coccidial oocysts orally and received aflatoxin in their rations. the combination of aflatoxin and coccidia produced higher mortality rate, ... | 1998 | 9707673 |
| induction of circadian rhythm of feeding activity by testosterone implantations in arrhythmic japanese quail males. | studies in vertebrates have shown that hormones can influence circadian rhythms of behavior. we investigated whether testosterone could induce rhythmicity in arrhythmic japanese quail, kept in dd. the animals used were 3 1/2-week-old castrated males from a line of quail selected for the lack of the circadian rhythm of feeding activity. after 3 weeks in dd, 8 birds were implanted with an empty implant and 16 others with a testosterone implant. two weeks later, the operation was repeated. after im ... | 1998 | 9711503 |
| an immunohistochemical study of putative neuromodulators and transmitters in the centrifugal visual system of the quail (coturnix japonica). | the aim of the present study was to analyze the neurochemical properties of the centrifugal visual system (cvs) of the quail using an immunohistochemical approach by testing 16 neuropeptides (angiotensin: ang, bradykinin: bk, cholecystokinin, dynorphin, l and m-enkephalin, beta-endorphin: beta-end, galanin, alpha-neoendorphin, neurokinin a, neuropeptide y (npy), ocytocin, somatostatin, substance p, vasopressin, vasoactive intestinal polypeptide) and three neurotransmitters or their synthetic enz ... | 1998 | 9719361 |
| cholecystokinin induces fos expression in the brain of the japanese quail. | systemic administration of cholecystokinin (cck) inhibits feeding in birds. however, the signaling pathway through which cck induces this effect is unknown, and its role as a natural satiety signal is controversial. to address these issues, we used immunocytochemistry for the immediate-early gene protein fos to localize sites of neuronal activation in the brain of japanese quail (coturnix japonica) after cck treatment. food intake was inhibited in a dose-dependent manner following intraperitonal ... | 1998 | 9735229 |
| effects of niacin deficiency on the levels of soluble proteins and enzyme activities in various tissues of japanese quail. | the effects of niacin deficiency on the levels of soluble proteins and enzyme activities of japanese quail have been investigated. sds-polyacrylamide gel electrophoresis revealed that in the pectoral muscle the soluble proteins with molecular masses corresponding to 181, 128, 93, 76, 72, 62, 56, 43, 41, 28 and 20 kda were present in lower amounts but those of 60, 50 and 37 kda were present in higher amounts. in the heart the soluble proteins with a molecular mass of 181 kda were present in lower ... | 1998 | 9744085 |
| interaction of second and third domains of japanese quail ovomucoid with ten mammalian trypsins. | second and third domains were prepared from japanese quail ovomucoid and association equilibrium constants, kas, were measured at 25 degreesc and ph 8 for these domains with trypsins from ten mammalian species: cat, cow, dog, guinea pig, hog, horse, man, rabbit, rat, and sheep. the values ranged from 108 m-1 to 1010 m-1 for the second domain-trypsin associations and from 106 m-1 to 108 m-1 for the third domain-trypsin associations. changes in ka values for the interactions between the trypsins a ... | 1998 | 9748658 |
| effects of brain testosterone implants on appetitive and consummatory components of male sexual behavior in japanese quail. | aromatization of testosterone (t) into an estrogen is necessary for the activation of consummatory and appetitive sexual behavior in male japanese quail. t action within the medial preoptic nucleus (pom) is necessary and sufficient to activate consummatory behavior, and some evidence suggests that pom might be involved in the control of appetitive behavior, but other brain regions, such as the bed nucleus of the stria terminalis (bst), an area that contains a dense population of aromatase-immuno ... | 1998 | 9766392 |
| forty generations of bidirectional selection for mating frequency in male japanese quail. | a bidirectional replicated selection experiment for high (h1 and h2) or low (l1 and l2) cumulative number of complete matings (cncm) in male japanese quail was conducted for 40 generations. in the s32 generation, a subline was taken from each selected line and selection was relaxed. in the randombred control line (c), cncm and unselected traits changed significantly over generations. means of the selected lines were adjusted each generation for deviations from the control means. after 40 generat ... | 1998 | 9776052 |
| avian ifn-gamma genes: sequence analysis suggests probable cross-species reactivity among galliforms. | little is known about the evolution of cytokines in non-mammalian systems. to address this problem, we attempted to clone the gene for interferon-gamma (ifn-gamma) from a variety of avian species using oligonucleotide primers based on the sequence of the chicken ifn-gamma gene. the coding sequence and partial intron sequences were determined for four species, namely guinea fowl, ring-necked pheasant, japanese quail, and turkey. to obtain sequence information on the gene extremities, a modified 5 ... | 1998 | 9781810 |
| pharmacological characterization, anatomical distribution and sex differences of the non-nmda excitatory amino acid receptors in the quail brain as identified by cnqx binding. | the distribution of non-n-methyl-d-aspartate binding sites was studied in coronal and sagittal sections through the brain of adult japanese quail by quantitative autoradiography, using tritiated 6-cyano-7-nitroquinoxaline-2,3-dione as a radioligand. saturation binding experiments were, in addition, carried out in areas showing high levels of binding (cerebellar molecular layer, nucleus anterior medialis and nucleus infundibularis) and demonstrated that the binding of tritiated ligand was specifi ... | 1998 | 9797075 |
| interactive effects of increased intake of saturated fat and cholesterol on atherosclerosis in the japanese quail (coturnix japonica). | increasing the energy value of diets with dietary fat, particularly fats rich in saturated fatty acids, can result in the elevation of plasma total and lipoprotein cholesterol. in the present study, experimental diets were designed to examine the effects of increasing the energy content of diets with a saturated fat source and cholesterol in a non-purified diet on hyperlipoproteinaemia and aortic plaque composition in the atherosclerosis-susceptible japanese quail (coturnix japonica) model of hu ... | 1998 | 9797648 |
| isolation and preliminary characterization of histone h1.b allelic variants from quail erythrocytes. | our goal was to purify and characterize the allelic variants h1b1 and h1b2 of histone h1.b, one of the seven subtypes of this linker histone extracted from japanese quail erythrocyte nuclei. these variants are revealed phenotypically as band h1.3 or part of band h1.4 by polyacrylamide gel electrophoresis (page) in sodium dodecyl sulfate (sds). all h1 subtypes together were separated from h5 by gel-permeation chromatography through bio-gel p-150. h1 was then fractionated on a column of the cation ... | 1998 | 9809440 |
| cholinesterase activity in quails of neuropathy caused by organophosphates. | it is known that some organophosphates produce not only well-known acute toxicity but also characteristic delayed neurotoxicity. tri-ortho-tolyl phophate (totp), which was formerly named tri-ortho-cresyl phosphaete (tocp), was first noticed in an incident of poisoning as the compound which produced organophosphate induced delayed neurotoxicity (opidn). it is said that triphenyl phosphite (tpp) is also one of the organophosphates which possesses opidn. however, it is thought that tpp-induced dela ... | 1998 | 9810153 |
| [characteristics of morphogenesis of the japanese quail embryos during microgravity]. | experiments performed in the period of 1995-1996 cooperatively with us investigators within the mir/shuttle and mir/nasa space science projects continued exploration of avian embryogenesis in microgravity. evaluation of japanese quail embryos incubated in spaceflight microgravity showed that for the most part they were normally developed and compliant with duration of incubation. one of the major morphometric characteristics of embryo are its mass and size. comparative analysis of body mass valu ... | 1998 | 9816435 |
| species differences in the hepatic microsomal enzyme metabolism of the pyrrolizidine alkaloids. | species differences in pyrrolic metabolites and senecionine (sn) n-oxide formation among eight animal species (sheep, cattle, gerbils, rabbits, hamsters, japanese quail, chickens, rats) varying in susceptibility to pyrrolizidine alkaloid (pa) intoxication were measured in vitro by hepatic microsomal incubations. the results suggested that there is not a strong correlation between the production of pyrrolic metabolites and susceptibility of animals to pa toxicity. the rate of pa activation in ham ... | 1998 | 9817084 |
| dietary cholesterol-induced xanthomatosis in atherosclerosis-susceptible japanese quail (cotunix japonica). | japanese quail of a strain (sus) susceptible to dietary cholesterol-induced atherosclerosis were fed a diet supplemented with cholesterol (0.5% w/w) for 4, 8 or 12 weeks. plasma cholesterol increased significantly from 240-1550 mg/dl at 4 weeks and remained at that concentration for 8 and 12 weeks on the same diet. plasma triglycerides (tgs) increased from 112-384 mg/dl after 4 weeks but showed no significant increases thereafter. striking eruptive xanthomatous lesions were noticed on the feet o ... | 1998 | 9839203 |
| [development of the device for japanese quail nestlings maintenance in microgravity]. | postembryonic development of the nestlings in microgravity has revealed their capacity for orientation and stabilization of their position in space which called for developing the special devices. under terrestrial laboratory conditions the facility for maintaining the nestlings aged up to 10 days has been developed and tested. the results of tests have indicated that despite the restricted volume of individual cages the nestlings can grow without significant variations from the norm as evidence ... | 1998 | 9858988 |
| activation of vitellogenin ii gene expression by steroid hormones in the old japanese quail. | alterations in the basal transcription rates of eukaryotic genes are believed to involve the binding of trans-acting factor(s) with specific dna sequences in the promoter. we show here two interrelated events for the vtgii gene of the old, non-egg laying japanese quail: alterations in the structure of the chromatin encompassing the gene, and binding of trans-acting factors to the promoter of the gene. estradiol/progesterone alone or together cause alterations in the conformation of the chromatin ... | 1998 | 9870615 |
| measurement of genetic variation within and between japanese quail lines using dna fingerprinting. | the objective of the present experiment was to study genetic variation within and among well-defined japanese quail lines by dna fingerprinting. the japanese quail lines included a randombred control line (r1) and lines developed from r1 by divergent selection over 30 generations for 4-wk bw (hw, lw) and total plasma phosphorus (tpp) (hp, lp), a measure of yolk precursor in the blood. in addition, two sublines (hw-hp, hw-lp) of hw, developed in the ninth generation, were included in the analysis ... | 1998 | 9872574 |
| increased heat shock protein expression after stress in japanese quail. | heat shock proteins (hsps) have been shown to provide information on the biological impact of environmental stress to organisms, yet none have investigated the hsp response to stress in birds. japanese quail were exposed to seven different stressors (mild restraint, loud noise, inescapable irritation, cold temperature, isolation in darkness, and two stressful social situations) and expression of hsp30, 60, 70, and 90 in heart, liver, lung, kidney and gonads was examined. tonic immobility (ti) te ... | 1998 | 9876257 |
| cytoarchitecture of the tectum opticum in the japanese quail. | the cytoarchitecture of the optic tectum of the japanese quail, coturnix coturnix japonica, was studied using the golgi-kopsch method, parvalbumin, calbindin and gaba immunohistochemistry and nicotinamide adenine dinucleotide phosphate-diaphorase histochemistry. our results reveal a large number of different types of interneurons in the quail tectum opticum, only part of which are described in the chick or pigeon. application of parvalbumin and calbindin immunohistochemistry and nicotinamide ade ... | 1998 | 9881878 |
| complementary dna sequence of chicken thyroid-stimulating hormone (tsh) beta subunit. | chicken tsh beta subunit cdna was cloned and sequenced. the cdna encodes a putative signal peptide and a mature protein consisting of 20 and 114 amino acids, respectively. the amino acid sequence of chicken tsh beta subunit is highly conserved (98.5%) between chicken and japanese quail, whereas it has a low homology between chicken and mammals (67-69%), an amphibian (58%) and fish (40-49%). structural characteristics of tsh beta subunits of avian species are discussed in comparison with those of ... | 1998 | 9881912 |
| [treatment of pompe's disease with recombinant enzymes]. | pompe disease is caused by the congenital deficiency of the lysosomal enzyme acid alpha-glucosidase. the accumulation of lysosomal glycogen results in a fatal myopathy and cardiomyopathy. we developed an enzyme replacement therapy based on recombinant human acid alpha-glucosidase enzyme targeted to the organs of interest by the presence of mannose-6-phosphate on this precursor enzyme and a manose-6-phosphate receptor present in muscle and heart. using molecular techniques and following extensive ... | 1998 | 9883081 |
| effects of 6-aminonicotinamide on levels of soluble proteins and enzyme activities in various tissues of japanese quail. | the effects of 6-aminonicotinamide (6-an) on the levels of soluble proteins and enzyme activities in various tissues of japanese quail were investigated. sds-polyacrylamide gel electrophoresis showed that the soluble proteins with molecular masses corresponding to 160.4 and 52.5 kda were either missing or present at lower concentrations in the brain of the 6-an treated group compared to those in the control group. the soluble liver proteins with molecular masses 200, 120 and 70.5 kda were missin ... | 1998 | 9924803 |
| state of imidazole side chain of hen lysozyme modified with histamine and japanese quail lysozyme. a study by immobilized metal ion affinity chromatography. | hen lysozyme modified with histamine (hml) and japanese quail lysozyme (jql) were treated with immobilized metal ion affinity chromatography to analyze the states of their imidazole groups. when ni(ii) was used as the metal ion immobilized, jql was strongly retained in a ni(ii)-chelating sepharose column, while hen lysozyme and hml were hardly retained in the same column. all of these lysozymes have a histidine imidazole group at the 15th position, while jql has an additional histidine imidazole ... | 1998 | 9972246 |
| methods for studying xenoestrogenic effects in birds. | the embryonated bird egg provides a simple whole organism test system that allows examination of xenoestrogenic effects at different levels of biological organisation. test compounds are injected into the yolk, the albumen or the air chamber at defined stages of embryonic development. bioavailability and embryonic exposure may be determined by autoradiography and image analysis. females represent the heterogametic sex (zw) and estrogens determine differentiation into the female phenotype in bird ... | 1998 | 10022333 |
| analysis of genetic polymorphisms in the major histocompatibility complex of japanese quail. | the restriction fragment length polymorphisms (rflp) of the japanese quail mhc were assayed in seven lines using pvuii-digested dna and a chicken class ii probe. the lines of japanese quail surveyed included a randombred control population (r1) and sublines of r1 divergently selected for 4-wk body weight (hw and lw lines) or plasma yolk precursor as measured by total plasma phosphorus (tpp) (hp and lp lines). in addition, two sublines (hw-hp and hw-lp) of the hw line were included in the analysi ... | 1999 | 10023740 |
| mate choice copying and conspecific cueing in japanese quail, coturnix coturnix japonica. | in four experiments, we examined the effects on the affiliative preferences of 'focal' female japanese quail given the opportunity to watch a conspecific male interact with a 'model' female. experiments were conducted in three, 10-min phases: (1) a pretest, during which a 'focal' female chose between two males; (2) an observation phase, when each focal female watched the male she had spent less time near during the pretest (her 'nonpreferred' male) interact with a 'model' quail; and (3) a post-t ... | 1999 | 10049487 |
| evaluation of japanese quail as a model system for avian transgenesis using avian leukosis viruses. | vertical transmission of avian leukosis viruses (alv) can occur genetically through the germline for both male and female chickens but only nongenetically or congenitally through the female. we had previously shown that tolerantly alv-infected males, from alv injection into fertile chicken eggs at day of set, can transmit proviral dna to their progeny through the germline. an attempt was made to repeat this successful retroviral germline insertion technique of chickens in japanese quail. after a ... | 1999 | 10051036 |
| apolipoprotein a-i of hyperlipidemia atherosclerosis prone (lap) quail: cdna sequence and tissue expression. | apolipoprotein a-i (apo a-i) has an important role in the transport of cholesterol. this study describes the complete nucleotide and deduced amino acid sequence for apo a-i of lap quail. a full length apo a-i cdna clone for hyperlipidemia atherosclerosis prone (lap) quail was isolated from a lambda gt10 liver cdna library. the dna sequence of lap apo a-i cdna was similar to that of normal japanese quail. the deduced amino acid sequence of lap apo a-i was hence identical to that of normal japanes ... | 1999 | 10052118 |
| production of donor-derived offspring by transfer of primordial germ cells in japanese quail. | we transfused concentrated primordial germ cells (pgcs) of the black strain (d: homozygous for the autosomal incomplete dominant gene, d) of quail into the embryos of the wild-type plumage strain (wp: d+/d+) of quail. the recipient quail were raised until sexual maturity and a progeny test of the putative germline chimeras was performed to examine the donor gamete-derived offspring (d/d+). thirty-one percent (36/115) of the transfused quail hatched and 21 (13 females and 8 males) of them reached ... | 1998 | 10067163 |
| testosterone modulates stimulation-induced calling behavior in japanese quails. | japanese quails have a variety of calling patterns depending on sex and age. sexually mature adult males emit a characteristic crow which has a frequency-modulated acoustical trill element. recently we reported that the intercollicular nucleus of the mesencephalon is the vocal neural system for producing the distress call in untreated chick and the crowing vocalization in testosterone-treated chick in japanese quails. we postulated that the intercollicular nucleus could mediate this testosterone ... | 1999 | 10077861 |
| experimental studies of chlamydiosis in japanese quails. | two-week-old japanese quails were infected intratracheally with six strains of chlamydia psittaci isolated from calf pneumonia, swine pneumonia, goat abortion, sheep abortion, kid enteritis, and calf conjunctivitis, respectively. the japanese quails from infected and control groups were closely observed for clinical symptoms. in order to examine the gross and microscopic lesions, quails in each group were sacrificed at 2, 5, 7, 10, 14, 21 and 30 days post infection. alterations induced by pneumo ... | 1999 | 10096166 |
| retinal tunel-positive cells and high glutamate levels in vitreous humor of mutant quail with a glaucoma-like disorder. | to investigate whether retinal cell death observed in an avian glaucoma-like disorder occurs by apoptosis and whether an increase in excitotoxic amino acid concentration in the vitreous humor is associated temporally with cell death in the retina. | 1999 | 10102297 |
| development of mechanoreceptor numbers in embryonic chick-quail chimeras. | our experiments addressed the problem of the regulation of the number of mechanoreceptors by sensory axons and/or their peripheral target tissues. according to a previous study (zelená et al. 1997) white leghorn chickens have more muscle spindles in the plantaris muscle (45.4+/-7.8; mean+/-sd) than the japanese quail (35.3+/-4.8) and significantly more herbst corpuscles in the crural region (380.0+/-85.0) than the quail (124.9+/-32.8). embryonic chick-quail chimeras were therefore used as a mode ... | 1999 | 10195308 |
| gene organization of the quail major histocompatibility complex (mhccoja) class i gene region. | class i genomic clones of the quail (coturnix japonica) major histocompatibility complex (mhccoja) were isolated and characterized. two clusters spanning the 90.8 kilobase (kb) and 78.2 kb class i gene regions were defined by overlapping cosmid clones and found to contain at least twelve class i loci. however, unlike in the chicken mhc, no evidence for the existence of any coja class ii gene was obtained in these two clusters. based on comparative analysis of the genomic sequences with those of ... | 1999 | 10199914 |
| regional distribution and control of tyrosine hydroxylase activity in the quail brain. | tyrosine hydroxylase (th) activity, the rate-limiting step in the synthesis of catecholamines, was quantified in the preoptic area-hypothalamus of adult male japanese quail by a new assay measuring the tritiated water production from 3,5-[3h]-l-tyrosine. maximal levels of activity were observed at a 20-25 microm concentration of substrate, with more than 50% inhibition of the activity being recorded at a 100 microm concentration. th activity was linear as a function of the incubation time during ... | 1999 | 10210165 |
| storage of retinoids and beta-carotene in the genital organs of japanese quail. | the present study was designed to investigate the effect of a one-month feeding of retinyl acetate (ra) on the retinol (rol), retinyl palmitate (rp) and beta-carotene (bc) levels in the blood, testicles and ovarian follicles of adult japanese quails. the basal diet (containing vitamin a at 10 x 10(3) iu/kg) was supplemented with 100 x, 500 x and 1000 x 10(3) iu/kg ra in groups i, ii and iii in both sexes. plasma vitamin a levels rose in all groups. the elevations were caused basically by the rp ... | 1999 | 10213933 |
| degradation of some pesticides in avian embryos. | on day 9 or 12 of the hatching period different pesticides (parathion, methyl-parathion, carbendazim, 2,4-d-amine na, phosmethylane) were applied in ecotoxicological trials. the formulations were either injected into the air space of pheasant, quail or hen eggs or hen eggs were treated by the immersion technique. the residues of pesticides were measured in samples on days 13, 14 and 16 of incubation of chicken and pheasant embryos, while the japanese quail embryos were analysed on days 10-14 of ... | 1999 | 10213936 |
| accumulation and localisation of maternal rna in oocytes of japanese quail. | accumulation of total rna and poly(a+)rna was determined in the oocytes of japanese quail (coturnix coturnix japonica) during oogenesis, by a standard spectrophotometric method, after rna extraction. intensive rna accumulation was observed in the oocytes 0.25-2.0 mm in diameter (correlated with the presence of lampbrush chromosomes), followed by a plateau in 2.0-3.0 mm oocytes (correlated with the condensation of lampbrush chromosomes). resumption of the rna accumulation in the 3.0-5.0 mm oocyte ... | 1999 | 10216917 |
| effects of fasting on the circadian body temperature rhythm of japanese quail. | the effect of food deprivation on the body temperature and activity rhythms of quail was assessed in birds exposed to both light-dark (ld) cycles and to continuous darkness (dd). quail normally exhibit a daily rhythm of body temperature in ld that will persist in dd (that is, the rhythm is circadian). in ld, 3 days' food deprivation caused the body temperature to drop below its normal nighttime levels, whereas daytime body temperature was unaffected. in dd, food deprivation caused the body tempe ... | 1999 | 10222486 |
| dopamine mediates circadian rhythms of rod-cone dominance in the japanese quail retina. | a circadian clock modulates the functional organization of the japanese quail retina. under conditions of constant darkness, rods dominate electroretinogram (erg) b-wave responses at night, and cones dominate them during the day, yielding a circadian rhythm in retinal sensitivity and rod-cone dominance. the activity of tyrosine hydroxylase, the rate-limiting enzyme in dopamine synthesis, also exhibits a circadian rhythm in the retina with approximately threefold higher levels during the day than ... | 1999 | 10234041 |
| immunomagnetic purification of viable primordial germ cells of japanese quail (coturnix japonica). | immunomagnetic cell sorting (macs) with the monoclonal antibody (mab) qcr1 was compared with the ficoll density-gradient centrifugation system (fics) in terms of the efficiency of enrichment of quail (coturnix japonica) primordial germ cells (pgcs) from blood. the purified pgcs were tested for their ability to settle in the chick (gallus domesticus) embryonic gonad. blood containing 60-100 pgcs microliter-1 was taken from the dorsal aorta of quail embryos at hamburger and hamilton's stages 14-16 ... | 1999 | 10327620 |
| social effects on mate choices of male japanese quail, coturnix japonica. | in four experiments, we examined effects on affiliative preferences of 'focal' male japanese quail of seeing a conspecific female interact with another male. each experiment was conducted in three 10-min phases: (1) a pretest during which a focal male chose between two females; (2) an observation phase, when each focal male watched the female he had spent more time near during the pretest (his 'preferred' female) interact with another male (referred to as a 'model' male); and (3) a post-test, du ... | 1999 | 10328786 |
| [biological life support systems: investigations on board of orbital complex "mir"]. | from 1989 till 1998 twelve experiments were performed by bulgarian, russian, slovak, and us researchers and engineers on the effects of space flight on the model of ecosystem "algae-fishes-bacteria", and ontogenesis of birds (japanese quail) and higher plants. for the first time several viable chicks were hatched and passed the whole cycle of their embryonic development in the mir microgravity. the length of the plant ontogenetic cycle as a whole and its specific stages appeared to be same as on ... | 1999 | 10330564 |
| [influence of hypodynamia on organism of japanese quail]. | the present study is a part of a more comprehensive investigation of the spaceflight effects on ontogenesis of the japanese quail. reported are data about the effects of a 33-day immobilization on behavior, physiology and the reproductive function of these birds. as was revealed in the experiment, immobilization reduces the mass of the quail body and leads to a number of reversible disorders in the reproductive function including a sharp decrease in oviposition in females and disturbances in spe ... | 1999 | 10330567 |
| expression of gicerin, a cell adhesion molecule, in the abnormal retina in silver plumage color mutation of japanese quail (coturnix japonica). | silver plumage color mutant (b/b) quail has an abnormal retina characterizing the transdifferentiation of retinal pigment epithelium (rpe) following the retinal separation in the early developmental stage. in the present study; (i) the expression of gicerin, an immunoglobulin-superfamily cell adhesion molecule, was examined in the retina of b/b quail. in the wild-type quail, gicerin protein was enriched in the apical membrane (facing the neural retina, nr) of rpe cells on embryonic day (e) 4 and ... | 1999 | 10336182 |
| gonadal steroid-dependent neuronal circuitries in avian limbic and preoptic regions. | in the avian limbic and preoptic region, the sexually dimorphic medial preoptic nucleus and nucleus of the stria terminalis are characterized by the presence of a testosterone-dependent aromatase-immunoreactive neuronal population. in situ hybridization studies confirmed that testosterone is modulating the expression of aromatase gene. both nuclei are also characterized by a sexually dimorphic, testosterone-dependent vasotocin system. immunocytochemical and in situ hybridization data, demonstrat ... | 1999 | 10342440 |
| the japanese quail as a model system for the investigation of steroid-catecholamine interactions mediating appetitive and consummatory aspects of male sexual behavior. | 1998 | 10349027 | |
| neurotoxic effects of 2,5-hexanedione on normal and neurofilament-deficient quail. | the neurotoxic effects of 2,5-hexanedione (2,5-hd) were investigated using neurofilament (nf)-deficient (quv) japanese quail in comparison with normal japanese quail. both quv and normal japanese quail were inoculated intraperitoneally with 350 mg/kg/day 2,5-hd for 6 consecutive wk. the results of 2,5-hd exposure differed substantially between the 2 strains of japanese quail. the 2,5-hd-exposed normal quail showed leg paralysis about 4 wk after initiation of dosing. some treated normal quail fel ... | 2017 | 10356712 |
| influence of drinking water and diet on the stable-hydrogen isotope ratios of animal tissues. | despite considerable interest in using stable-hydrogen isotope ratio (deltad) measurements in ecological research, it was previously unknown whether hydrogen derived from drinking water, in addition to that derived from diet, contributed to the nonexchangeable hydrogen in animal tissues. we raised four experimental groups of quail (coturnix coturnix japonica) from hatch on two isotopically distinct diets (mean nonexchangeable deltad: -146 and -60 per thousand, vienna standard mean ocean water st ... | 1999 | 10393937 |
| evaluation of stunning/killing methods for quail (coturnix japonica): bird welfare and carcase quality. | 1. the welfare and carcase quality implications of stunning/killing 7-week-old japanese quail with either an electric current, 90% argon in air or a mixture of 30% carbon dioxide and 60% argon in air were investigated in 3 separate experiments. 2. the results showed that exposure of quail to either argon or the carbon dioxide-argon mixture resulted in loss of posture on average at 9 and 8 s respectively. in both gas mixtures, convulsions started 6 s after the loss of posture and the duration of ... | 1999 | 10405033 |
| effects of phosphate, prostaglandins, arachidonic acid and arginine vasotocin on oviposition and pigment secretion from the shell gland in japanese quail. | 1. phosphate solution, prostaglandin f2alpha and e2, arachidonic acid and arginine vasotocin were injected intrauterinely or intravenously into laying quail hens 6 h before expected oviposition. following injections, induced ovipositions and secretions of pigment from their shell glands were observed. 2. the effects of intrauterine injection with prostaglandins, which induced oviposition and pigment secretion, were not inhibited by pre-injection of indomethacin. 3. indomethacin completely inhibi ... | 1999 | 10405049 |
| treating japanese quail with vitamin c does not facilitate their capture by the experimenter. | 1. vitamin c supplementation reduces fear of novel situations and of people. the present study examined its effects on the ease of capture of male japanese quail by the experimenter. 2. at 20 d of age, quail received either vitamin c (ascorbyl-2-polyphosphate, app, 1 g l-ascorbic acid/l) solution or untreated drinking water (udw) for 24 h before they were mixed in 2 groups of 40 (20 app + 20 udw. all the birds in 1 group were caught individually by an unsighted experimenter whereas a sighted cat ... | 1999 | 10405053 |
| effects of naloxone on the acquisition and expression of appetitive and consummatory sexual behavior in male japanese quail. | previous studies in japanese quail indicate that central administration of the opioid antagonist naloxone enhances consummatory sexual behavior (csb). this effect could be related either to a decrease in sexual satiety or to previously documented stimulatory effects of naloxone on gnrh. the present studies were performed to investigate these two possibilities and to explore for the first time opioid involvement in the expression and acquisition of appetitive aspects of sexual behavior (asb) in c ... | 1999 | 10405104 |