| maternal corticosterone is transferred to avian yolk and may alter offspring growth and adult phenotype. | many environmental perturbations may elevate plasma corticosterone in laying birds, including disease, poor body condition, high predator density, anthropogenic disturbance, and/or food scarcity. when adverse conditions are not dire enough to dictate foregoing reproduction, maternal corticosterone in egg yolk may phenotypically engineer offspring so as to maximize success under the constraints of the local environment. we tested the hypotheses that corticosterone in avian egg yolk should correla ... | 2004 | 14723888 |
| melatonin supplementation can ameliorate the detrimental effects of heat stress on performance and carcass traits of japanese quail. | melatonin, the major pineal hormone, modulates growth in poultry by influencing hormones involved in growth. we investigated the effects of dietary melatonin supplementation on performance, carcass characteristics, and excretion of nitrogen and some minerals in broiler japanese quails (coturnix coturnix japonica) exposed to high-ambient-temperature stress (34 degrees c). one hundred twenty japanese quails (10 d old) were randomly assigned to 4 treatment groups, 3 replicates of 10 birds each. the ... | 2003 | 14716096 |
| behavioural investigation of polarisation sensitivity in the japanese quail (coturnix coturnix japonica) and the european starling (sturnus vulgaris). | many animals have sensitivity to the e-vector of linearly polarised light, which may assist in visually mediated behaviours such as navigation, signalling and foraging. however, it is still controversial as to whether birds possess polarisation sensitivity. several studies have found that altering the polarisation patterns of the broad visual field surrounding birds alters their intended migratory orientation. however, electrophysiological tests have failed to elicit evidence for polarisation se ... | 2003 | 12909701 |
| effects of poppy seed meal on egg production and hatching results in quail (coturnix coturnix japonica). | this study was carried out to determine the effects of poppy seed meal (psm) on the egg production and hatching of quail. two experiments were undertaken. in the first experiment, 240 quail, reared under the same conditions, were divided into four groups of 60 birds each (which were, in turn, subdivided into four subgroups of 15 each for experimental replicates). the first, second, and third experimental groups were fed ratios containing 5%, 15%, and 25% psm, respectively, over 12 weeks. the con ... | 2003 | 12893163 |
| effect of feeding time on the reproductive performance of japanese quail (coturnix coturnix japonica). | several feeding regimens are applied to improve performance of fertile egg production during times of heat stress. during a period of heat stress (34 to 36 degrees c), two feeding periods were used to measure the impact of feeding time on reproductive performance of japanese quail (coturnix cotunix japonica) between 44 and 60 wk of age. each feeding time treatment had 25 individually caged male and female pairs. quail were fed ad libitum between 0600 to 1400 or 1400 to 2200 h daily. results indi ... | 2003 | 12872978 |
| effect of acetyl salicylic acid in drinking water on reproductive performance of japanese quail (coturnix coturnix japonica). | the impact of acetyl salicylic add (asa) on reproductive performance during periods of heat stress was studied in japanese quail (coturnix coturnix japonica). during a season when daily high temperatures averaged between 34 and 40 degrees c, four treatments each containing four replicates of five males and five females were given 0, 0.5, 1.0, or 1.5 g/l asa in drinking water from 34 to 45 wk of age. at 39 wk of age control quail were lighter than quail fed asa. quail receiving 1.5 g/l asa exhibi ... | 2003 | 12872976 |
| effect of early feed restriction on reproductive performance in japanese quail (coturnix coturnix japonica). | reproductive performance of quail (coturnix coturnix japonica) was evaluated following feed restriction (100, 85, and 70% of ad libitum) between 2 to 5 wk of age with three replicates of 12, 2-wk-old chicks per replicate. body weight, feed conversion, and leucocyte distribution were measured during feed restriction. after experimental feed treatment, bw, age at first egg, egg production, fertility, hatchability, and embryonic mortality were evaluated from five replicates of two females and one m ... | 2003 | 12872974 |
| effects of probiotics: alone and in a mixture of biosacc plus zinc bacitracin on the caecal microflora of japanese quail. | the aim of this study was to investigate the effects of two commercially available probiotics, alone and in combination with an antibiotic, on the caecal flora of japanese quail (coturnix coturnix japonica) reared under unstressed conditions. thirty-four 90-day-old japanese quail were selected for this study. the birds were divided into four groups, two groups of nine birds and two groups of eight birds. the animals in these groups were given feed containing 0.5 kg per tonne of probiotics alone ... | 2003 | 12801457 |
| dietary vitamin c and folic acid supplementation ameliorates the detrimental effects of heat stress in japanese quail. | we evaluated the effects of vitamin c (l-ascorbic acid) and folic acid supplementation on performance, carcass characteristics and concentrations of the oxidative stress markers [malondialdehyde (mda), homocysteine], adrenocorticotropic hormone (acth), vitamins c, e, a, b-12 and folic acid, and mineral status in broiler japanese quail (coturnix coturnix japonica) exposed to high ambient temperature (34 degrees c, 8 h/d, 0900-1700 h). the birds (n = 150; 10-d-old) kept at 34 degrees c were fed a ... | 2003 | 12771333 |
| retinoids, lrat and reh activities in eggs of japanese quail following maternal and in ovo exposures to 3,3',4,4'-tetrachlorobiphenyl. | environmental monitoring for the effects of organochlorine contaminants has identified changes in egg yolk retinoid concentrations, however underlying mechanisms are unknown. breeding female japanese quail, coturnix coturnix japonica, received 3 bimonthly injections of a low dose (5 microg/g) of the coplanar polychlorinated biphenyl (pcb) 3,3',4,4'-tetrachlorobiphenyl. no overt maternal toxicity or embryotoxicity was detected. for the exposed females, oocytes (yolk deposition nearly completed) a ... | 2016 | 12739853 |
| melatonin enhances cellular and humoral immune responses in the japanese quail (coturnix coturnix japonica) via an opiatergic mechanism. | it is known that melatonin has important immunomodulatory properties in the japanese quail. however, the mechanism of melatonin action on the immune system is not clearly understood in avian species. in mammals, the immunostimulatory properties of melatonin are mediated by the release of opioid peptides from activated t-lymphocytes. the present study was performed to determine if these same melatonin-induced opioids (mio) are involved with the immunoenhancing effects of melatonin in quail. three ... | 2003 | 12714007 |
| presence and developmental regulation of serotonin n-acetyltransferase transcripts in oocytes and early quail embryos (coturnix coturnix japonica). | by rt-pcr two transcripts for arylalkylamine n-acetyltransferase (aa-nat; serotonin n-acetyltransferase; ec 2.3.1.87), the key enzyme in melatonin synthesis, were found, for the first time, in the oocytes and blastoderms from freshly laid eggs (323- and 238-bp rt-pcr products), and one (238-bp product) in the pineal gland of japanese quail (coturnix coturnix japonica). the two products differed by an intron of 85-bp present in the 323-bp band and absent from the 238-bp band. the identity of the ... | 2003 | 12704723 |
| evaluation of a collagen patch as a method of enhancing ventriculotomy healing in japanese quail (coturnix coturnix japonica). | to assess the ability of a porcine submucosal collagen patch to enhance ventriculotomy healing in quail. | 2011 | 12692754 |
| distribution and origin of steroid hormones in the yolk of japanese quail eggs (coturnix coturnix japonica). | the yolk of avian eggs contains steroid hormones, which may influence the development and behaviour of hatched birds. the aim of the present study was to investigate the concentration as well as the distribution of various gonadal steroids in the yolk spheres of quail eggs. steroid concentrations of dissected yolk layers were analysed after alcoholic extraction using enzyme immunoassays (eias) for progesterone, androstenedione and testosterone. to monitor the uptake of testosterone into the yolk ... | 2003 | 12677460 |
| effect of different dietary levels of yucca schidigera powder on the performance, blood parameters and egg yolk cholesterol of laying quails. | a total of 135 laying quails (coturnix coturnix japonica), 9 weeks old, were divided into three dietary treatment groups. three replicates were assigned to each treatment group consisting of 15 birds per cage. the diet was supplemented with 0, 100 and 200 ppm yucca schidigera powder and given ad libitum to the quails for a period of 14 weeks. body weight, egg production, feed consumption and feed efficiency were not different due to dietary treatments among the groups. increased egg weight was d ... | 2003 | 12650503 |
| melatonin can produce immunoenhancement in japanese quail (coturnix coturnix japonica) without prior immunosuppression. | in recent years, it has been determined that melatonin has important immunostimulatory properties in mammalian and avian species. typically, this immunoenhancement has only been examined in immunosuppressed animals. the effect of melatonin on normal (unsuppressed) immune systems is yet to be evaluated in avian species. an experiment was performed to determine if transient and/or continuous melatonin treatments could enhance immune functions in japanese quail without prior immunosuppression. all ... | 2002 | 12441122 |
| effects of starvation on gonadotropin and thyrotropin subunit mrna levels and plasma hormone levels in the male japanese quail (coturnix coturnix japonica). | contents of mrnas encoding lhbeta-, fshbeta-, tshbeta- and common a-subunit precursor molecules were measured in male japanese quail deprived of food for three days. plasma lh, fsh, thyroxine and triiodothyronine levels were also measured in the same birds. plasma lh levels declined during the period of food deprivation. levels in starved birds were not different from those in control birds after one day of starvation but were significantly lower after three days. plasma fsh levels showed a simi ... | 2002 | 12125931 |
| development of embryos from in vitro ovulated and fertilized oocytes of the quail (coturnix coturnix japonica). | the development of quail embryos obtained after in vitro fertilization of oocytes ovulated in vitro was investigated. about 40% of the specimens, after 18-20 hr of incubation, had undergone cleavage to reach stages iv-vi when viewed under a stereo microscope. however, only 36% of these embryos contained normal, dapi-stained nuclei when observed under a fluorescent microscope; the other 64% showing a morphologically normal cleavage pattern did not contain nuclei. control unfertilized oocytes, ovu ... | 2002 | 12115941 |
| pineal melatonin secretion, but not ocular melatonin secretion, is sufficient to maintain normal immune responses in japanese quail (coturnix coturnix japonica). | reports that plasma melatonin is an important immune regulator in avian species have been rather sparse and contradictory. also, the primary source of immune-modulating melatonin has yet to be determined in birds. in japanese quail (coturnix coturnix japonica), the pineal gland and eyes contribute roughly two thirds and one third of the melatonin found in the blood, respectively. two experiments were conducted to evaluate melatonin as an immune modulator in japanese quail and to determine the pr ... | 2002 | 12093123 |
| evaluation of tiletamine-zolazepam as an anesthetic in quail (coturnix coturnix japonica). | the objective of the present study was to evaluate the effects of tiletamine-zolazepam (tz) administered alone or in combination with atropine, xylazine, and levomepromazine to quail (coturnix coturnix japonica). the induction time, duration of hypnosis and anesthesia, and time to recovery were determined. the presence or absence of tremor, upper respiratory tract secretions, and excitability and the degree of muscular tone were also observed. the results showed that doses from 10 to 100 mg/kg t ... | 1999 | 12086457 |
| daily temporal organization of laying in japanese quail: variability and heritability. | in birds, many behavioral and physiological processes that occur during reproduction show daily rhythms in response to environmental temporal constraints. in this study, the individual daily organization of laying and its genetic determinant in japanese quail (coturnix coturnix japonica) were analyzed. for this purpose, the oviposition time of 102 randomly chosen females, maintained in long-day photoperiodic conditions (ld 14 h:10 h) for 1 mon was observed and extreme phenotypes selected. laying ... | 2002 | 12025931 |
| molecular cloning and circadian regulation of cryptochrome genes in japanese quail (coturnix coturnix japonica). | the circadian system is thought to have three components: input, pacemaker (internal clock), and output. cryptochromes (cry) are important clock genes, and recent findings indicate that these genes not only act as circadian photoreceptors but are also essential components in the negative feedback of the circadian system. as a first step toward understanding the avian circadian system, the authors tried to clone japanese quail homologs of mammalian crys and analyze their expression patterns in di ... | 2002 | 11837944 |
| histological and histochemical studies on the lingual, preglottal and laryngeal salivary glands of the japanese quail (coturnix coturnix japonica) at the post-hatching period. | the postnatal development and histochemistry of mucins of the lingual, preglottal and laryngeal glands in the quails were investigated by means of light microscopy using specific staining for complex carbohydrates. in this study, the tongues were taken from female and male quails from day 1 to day 60 after hatching. the salivary glands in quail's tongue comprised the lingual gland, with lateral and medial (paraentoglossal gland) portions that differ in morphology and histochemical staining, and ... | 2001 | 11820407 |
| regulation of hydroxyindole-o-methyltransferase gene expression in japanese quail (coturnix coturnix japonica). | hydroxyindole-o-methyltrasferase (hiomt) plays an important role as the final enzyme in the synthesis of melatonin. in this study, the expression of the hiomt gene in japanese quail was investigated with respect to tissue distribution and the effects of light and vitamin a deficiency. hiomt mrna in the pineal gland and eye had a clear daily rhythm with peak values in daytime. the testis also contained a detectable amount of hiomt mrna, which did not display a rhythmic change over a 24-h period. ... | 2001 | 11791725 |
| effects of dietary formalin on the health and testicular pathology of male japanese quails (coturnix coturnix japonica). | male japanese quail (n = 75) at 35 d of age were fed 20.0, 10.0, 5.0, 2.5 or 0 ml formalin (37% formaldehyde)/kg of their daily ration for 8 w. quail fed 20.0 or 10.0 ml formalin/kg feed showed depression, decreased responsiveness, feed consumption, and body weights, and had vacuolation in the germinal epithelial layer of their seminiferous tubules. formalin feeding at up to 5 ml/kg was associated with decreased weight of testes, and up to 2.5 ml/kg feed resulted in smaller diameter seminiferous ... | 2001 | 11757989 |
| impact of vinclozolin on reproductive behavior and endocrinology in japanese quail (coturnix coturnix japonica). | the impact of endocrine-disrupting chemicals (edcs) has been demonstrated in mammalian models, but less research is available for avian species. the effects of vinclozolin (vin), an antiandrogenic fungicide, on sexual differentiation and maturation were investigated in japanese quail (coturnix coturnix japonica). on day 4 of incubation, embryos were exposed to no treatment, oil, or 25, 50, or 100 ppm of vin. endpoints measured included adult male reproductive behavior, hypothalamic gonadotropin- ... | 2001 | 11699774 |
| morphometric analysis of the intestine of domestic quails (coturnix coturnix japonica) treated with different levels of dietary calcium. | the aim of this study was to perform a morphometric analysis of the various parts of the intestine of the domestic quail. twenty-four female quails (coturnix coturnix japonica) aged 37 weeks were used and accommodated in laying cages for 12 weeks. each group was fed a standardized diet containing different quantities of calcium: 2.0%, 2.5%, 3.0% and 3.5%. the birds were weighed, killed, and samples of 1 cm were collected from the duodenum, jejunum and ileum and submitted to the histological rout ... | 2001 | 11688737 |
| [effect of monoamines and testosterone on hypothalamo-gonadal complex of japanese quail (an electrophysiological and morphometric study)]. | effects of biogenic amines, testosterone and melatonin both on the developing electrical activity of hypothalamic arcuate nucleus (na) and morphology of testis and na neurocytes during maturation in birds (coturnix coturnix japonica) were tested. slow [symbol: see text]-frequency was shown to prevail at quail na electrical activity. na spectral power gradually enlarges during maturation. the data confirm the evidence that catecholamines induce acceleration of sexual maturation in birds mainly vi ... | 2001 | 11571924 |
| developmental changes in the mrna levels of igf-i and its related genes in the reproductive organs of japanese quail (coturnix coturnix japonica). | summary insulin-like growth factor-i (igf-i) is involved in the regulation of growth and differentiation of a variety of vertebrate tissues. the biological actions of igf-i are mediated mainly by the igf-i receptor (igf-ir) and partly by the insulin receptor (ir) and modulated by igf binding proteins (igfbp). we conducted studies designed to clarify the possible roles of igf system in the development of the avian reproductive organs. we cloned cdnas of igf-i, igf-ir, ir and igfbp-2 of japanese q ... | 2001 | 11437471 |
| vitamin a deficiency reduces insulin-like growth factor (igf)-i gene expression and increases igf-i receptor and insulin receptor gene expression in tissues of japanese quail (coturnix coturnix japonica). | the insulin-like growth factor (igf) system is regulated by various stimuli, including hormones, growth factors and nutritional status. we examined the effects of vitamin a on components of the igf system in japanese quail. male quail (1 d old) fed a vitamin a-deficient diet for 14 or 21 d developed vitamin a deficiency, as confirmed by a depletion of serum retinol and hepatic retinyl palmitate. consuming the vitamin a-deficient diet for 14 d did not affect growth rate, but decreased the serum i ... | 2001 | 11285324 |
| the acute phase response in japanese quail (coturnix coturnix japonica). | experiments were conducted to determine the effect of injection of lipopolysaccharide (lps, from s. typhimurium) or muramyl dipeptide (mdp, n-acetylmuramyl-l-ala-isoglutamine) in japanese quail. doses of mdp between 0.3 and 10 mg/kg body wt. had no effect on body temperature. in contrast, doses of 1.0-22.5 mg lps/kg body wt. caused significant increases in body temperature. none of the doses of lps or mdp resulted in mortality. the febrile response to lps was diminished following a second inject ... | 2001 | 11239838 |
| 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 |
| 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 |
| [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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| glutathione depletion by xenobiotics in coturnix coturnix japonica. | | 1998 | 9606269 |
| 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 |
| 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 |
| 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 |
| 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 |
| the annual testicular cycle of the domestic quail (coturnix coturnix japonica). | a morphometric study was conducted on the testis of the domestic quail coturnix coturnix japonica to determine testicular kinetics. we investigated the variability along the year of testicular parameters such as seminiferous tubule diameter, germinal epithelium height and amount of meiotic figures of maturing spermatids in the seminiferous epithelium and of sperm in the tubular lumen. the results of morphometric analysis showed the occurrence of an annual testicular cycle defined by four distinc ... | 1997 | 9400052 |
| bh (black at hatch) gene appears to be expressed in melanocytes of feather germs in the japanese quail (coturnix coturnix japonica). | the bh (black at hatch) gene was examined to determine whether it is expressed in plumage melanocytes by analyzing pigmentation patterns of bh melanocytes placed in the micro-environment of the feather germs of quail embryos with pink eyes. these host quails genetically lack a large part of plumage melanin. the bh locus in these almost white quails is wild-type. when bh neural crest cells were transplanted orthotopically into the host embryos, wild-type and bh/+ melanocytes, which differentiated ... | 1997 | 9352198 |
| short latency vestibular evoked potentials in the japanese quail (coturnix coturnix japonica). | short-latency vestibular-evoked potentials to pulsed linear acceleration were characterized in the quail. responses occurred within 8 ms following the onset of stimuli and were composed of a series of positive and negative peaks. the latencies and amplitudes of the first four peaks were quantitatively characterized. mean latencies at 1.0 g ms-1 ranged from 1265 +/- 208 microseconds (p1, n = 18) to 4802 +/- 441 microseconds (n4, n = 13). amplitudes ranged from 3.72 +/- 1.51 microv (p1/n1, n = 18) ... | 1997 | 9190045 |
| comparison between oogenesis and related ovarian structures in a reptile, pseudemys scripta elegans (turtle) and in a bird coturnix coturnix japonica (quail). | the aspect of the oogonia during their premitotic dna synthesis and of the premeiocytes during their premeiotic dna synthesis was studied in turtles by autoradiography, after injection of 3h-thymidine. as in the adult laying quail, the intrafollicular oocytes of the adult turtle go through three successive stages: prelampbrush, lampbrush and postlampbrush. during the prelampbrush and lampbrush stage two kinds of nucleoli exist: peripheral and central. in contrast to avian yolk, during its final ... | 2006 | 9269708 |
| oxygen consumption and vital organ masses in young growing quail (coturnix coturnix japonica). | | 1997 | 9179319 |
| scierai ectasia associated with hereditary retinal dysplasia in a mutant strain of japanese quail (coturnix coturnix japonica). | ocular defects and age-related lesions in mutant (gub strain) japanese quail (coturnix coturnix japonica), phenotypically characterised by silver plumage, are described. grossly, a circular area of hypopigmentation in the posterior retina with thinning of the subjacent sciera was observed in all gub quails. as the birds matured, the thinned sciera progressed to scierai ectasia. histologically, the sciera at the ectatic area consisted of an outer fibrous layer and was devoid of the inner cartilag ... | 1997 | 18483890 |
| divergent selection for body weight and yolk precursor in coturnix coturnix japonica. 12. heterosis in reciprocal crosses between divergently selected lines. | a selection experiment was started using japanese quail to study the genetics of bw and plasma yolk precursor (measured by total plasma phosphorus; tpp). lines were divergently selected for 4-wk bw (hw and lw) or plasma tpp (hp and lp). sublines of hw were developed by continuing to select the males for increased 4-wk bw while selecting the females for increased (hw-hp line) or decreased (hw-lp line) tpp. the purpose of the present study was to determine the inheritance of traits associated with ... | 1997 | 9068041 |
| effect of gonadotrophin and sex steroid on the scotoresponses of day old chicks of japanese quail, coturnix coturnix japonica. | luteinizing hormone (lh) and testosterone propionate (tp) were tested for their effects on the development of scotorefractoriness in japanese quail. day old chicks of both the sexes were divided into four groups and treated with normal saline, lh (1 microg/100 g body weight) and two doses of tp (100 microg/100 g body weight- tp1 and 1 mg/100 gm body weight- tp2) over a periods of 14 weeks. in the male chicks, compared to control, lh treatment advanced and low dose of tp suppressed the developmen ... | 1997 | 9328228 |
| changes in retinal dopaminergic cells and dopamine rhythmic metabolism during the development of a glaucoma-like disorder in quails. | to examine the possible correlation between a dysfunction of the daily rhythm of retinal dopamine (da) and the development of a glaucoma-like disorder in an animal model, the al mutant quail (coturnix coturnix japonica). | 1996 | 8843918 |
| molecular cloning of quek 1 and 2, two quail vascular endothelial growth factor (vegf) receptor-like molecules. | we have previously reported the cloning of two partial cdnas corresponding to two quail (coturnix coturnix japonica) receptor tyrosine kinases (rtks), named quek 1 and quek 2, and their expression in endothelial cells of the early avian embryo. we here report the cloning of the full-size cdnas for both molecules. sequence comparison shows that quek 1 and 2 share an overall amino acid (aa) identity of 49%. they both comprise seven extracellular immunoglobulin-like (ig-like) domains, a single tran ... | 1996 | 8863722 |
| paired pineals in the developing quail (coturnix coturnix japonica) embryos. | paired pineals were observed as an anomaly in embryonic quail brains between 7 and 9 days of incubation. the size of each pineal was almost the same as that of the normal pineal and it was located slightly lateral of the midline. histological examination of these paired pineals revealed that both had similar cytological features in comparison with the normal pineal of the same developmental stage. no abnormal features were detected in brains and eyes of the embryos with paired pineals. since the ... | 1996 | 8940911 |
| inherited muscular disorder in mutant japanese quail (coturnix coturnix japonica): an immunohistochemical study. | cryostat sections of myofibres from the musculus pectoralis thoracicus of a newly established mutant strain (lwc) of japanese quail with a myotonic dystrophy-like myopathy were labelled with antibody against myosin heavy chain (mhc) isoforms and neural cell adhesion molecule (n-cam). the characteristic lesions found in sections of muscle of lwc quail stained with haematoxylin and eosin were type 2b fibre atrophy, sarcoplasmic masses, and ring fibres. immunohistochemical examination failed to dis ... | 1996 | 8910742 |
| body weights, carcase characteristics, organ weights, abdominal fat, and lipid content of liver and carcase in two lines of japanese quail (coturnix coturnix japonica), unselected and selected for four week body weight. | 1. the present study was conducted on quails to evaluate the effects of line and sex on body weight, carcase characteristics and organ weights and also to evaluate the effect of line on sex organs, and on carcase and liver lipid content of male quails. 2. chicks of both sexes were weighed weekly until 6 weeks when they were slaughtered. carcase yield, parts yield and measurement, weight of liver, heart, gizzard, abdominal fat and sex organs were obtained. carcase and liver lipid content of male ... | 1996 | 8842465 |
| ultrastructural modifications in cultured fetal quail hepatocytes exposed to pesticides and pcbs. | there is increasing interest in cultured hepatocytes as a tool for solving toxicological and pharmacological problems while reducing laboratory animal experimentation. in the present study, fetal hepatocytes from the japanese quail (coturnix coturnix japonica) were used as an in vitro alternative model for evaluating the effects of pcbs and various pesticide-type chemicals on cell ultrastructure. major alterations were demonstrated. the most striking effects of toxicants were an increase in the ... | 1996 | 8812180 |
| proliferation of granulosa and thecal cells in germinal disc and non-disc regions during follicular growth in japanese quail (coturnix coturnix japonica): bromodeoxyuridine incorporation in situ. | proliferation of granulosa and thecal cells was analysed during ovarian follicular growth in laying japanese quail. the birds were injected intraperitoneally with bromodeoxyuridine (brdu) 10 or 4 h before ovulation, that is, before or after a preovulatory lh surge, respectively, and incorporation of brdu by follicular tissues was detected immunocytochemically. cells labelled with brdu were seldom seen in the most immature follicles in the ovarian cortex, whereas many granulosa and thecal cells w ... | 1996 | 8699425 |
| divergent selection for body weight and yolk precursor in coturnix coturnix japonica. 11. correlated responses over thirty generations. | japanese quail lines were divergently selected for 4-wk bw (hw and lw lines) and plasma yolk precursor [total plasma phosphorus (tpp); hp and lp lines] for 30 generations. the base population was a randombred control line (r1) that was maintained along with the selected lines. sublines were established from the ninth selected generation of hw by continuing to select males for increased 4-wk bw and selecting females for increased (hw-hp line) or decreased (hw-lp line) tpp. correlated responses ov ... | 1996 | 8786935 |
| inherited muscular disorder in mutant japanese quail (coturnix coturnix japonica): an ultrastructural study. | ultrastructural study of muscles taken from a mutant (lwc) strain of japanese quail with myotonia showed type 2 fibre atrophy, ring fibre formation, sarcoplasmic masses, and "moth-eaten" fibres. in these abnormal fibres, the most characteristic feature was the loss of interconnection among the myofibrils, mitochondria, and t tubules. apparently normal muscle fibres often showed mild changes, such as proliferation of t tubules and enlarged sarcoplasmic areas with increased glycogen granules and r ... | 1996 | 8762590 |
| divergent selection for body weight and yolk precursor in coturnix coturnix japonica. 10. response to selection over thirty generations. | japanese quail lines were divergently selected for 30 generations for 4-wk bw (hw, lw) or plasma yolk precursor (hp, lp) as measured by total plasma phosphorus (tpp) at the beginning of lay. the hw, lw, hp, and lp lines were initiated from a randombred control line (r1). in the ninth generation of selection in the hw line, sublines were developed by continuing to select males for increased 4-wk bw whereas females were selected for increased (hw-hp line) or decreased (hw-lp) tpp. individual selec ... | 1996 | 8778720 |
| fibromuscular dysplasia in intramuscular arteries of japanese quail (coturnix coturnix japonica). | fibromuscular dysplasia (fmd) was found in the intramuscular arteries of both commercial (normal) and mutant (lwc) strains of japanese quail. the mutant strain lwc is afflicted with an inherited muscular dystrophy exhibiting myotonia. the arterial lesions were classified as medial fibroplasia or medial hyperplasia, both being subtypes of medial fmd. some lesions showed extensive proliferation of medial smooth muscle into the vascular lumen, resulting in partial occlusion of the affected blood ve ... | 1996 | 8920213 |
| intestinal growth in altricial european starling (sturnus vulgaris) and precocial japanese quail (coturnix coturnix japonica). a morphometric and cytokinetic study. | this paper introduces the comparison of altricial and precocial birds as a model system for the study of patterns of intestinal growth. it reports on comparative morphometric and cytokinetic studies of intestinal growth in altricial european starling (sturnus vulgaris) and precocial japanese quail (coturnix coturnix japonica). morphometric data at five gut segments of neonates and adults of both species are provided to evaluate the growth of the intestine. a double labelling technique combining ... | 1996 | 9078400 |
| subtypes of active cell death in the granulosa of ovarian atretic follicles in the quail (coturnix coturnix japonica). | follicular atresia in the ovaries of japanese quail was studied by cytochemistry and electron microscopy. three different types of cell death coexisted in the granulosa. a large number of cells showed signs of apoptosis. the dna fragmentation in these cells was demonstrated in a previous study using in situ end-labeling. a second and non-negligible type of cell death consisted of extensive autophagocytosis of the cytoplasm occurring simultaneously with late nuclear alterations. finally, a few de ... | 1996 | 8663915 |
| effect of age and carcase composition on the onset of sexual maturity in quail under normal feeding regimens. | 1. the effect of age and carcase composition on the onset of sexual maturity was investigated in japanese quail (coturnix coturnix japonica) reared under a normal feeding regimen. 2. at 42 d of age, when the quail had started to lay and hen day production was about 60%, layers were heavier and contained more carcase fat than those that were not laying. 3. the liver and the ovary weight were greater following the onset of sexual maturity than 1 or 2 weeks before (35 and 28 d respectively). 4. car ... | 1995 | 8746978 |
| functional maturation of neuroendocrine gonadal axis is altered by specific phase relations of circadian neurotransmitter activity in japanese quail. | the present study was designed to ascertain the effects of temporal relationship of circadian neural oscillations on puberty attainment and reproductive growth of japanese quail, coturnix coturnix japonica. serotonin and dopamine precursors (5-hydroxytryptophan, 5-htp and l-dihydroxyphenylalanine, l-dopa; 5 mg/100 g body weight) were injected daily, 8 and 12 h apart in two groups of one-day old chicks, while controls received two daily injections of normal saline. weekly/biweekly observations (b ... | 1995 | 8719179 |
| influence of various dietary protein levels on carcase composition in the male japanese quail (coturnix coturnix japonica). | 1. the present study was conducted to determine the effect of various dietary protein concentrations on the carcase composition of male japanese quail. 2. six diets varying in protein from 160 to 300 g/kg and containing approximately 11.72 mj/kg me were fed for 5 weeks and analysed for dry matter, protein, fat and ash. 3. treatments affected carcase weight, dry matter, protein, ether extract and ash (p < 0.01). 4. the water content of the carcases decreased with increasing dietary protein concen ... | 1995 | 8590093 |
| exposure of domestic quail embryos to extremely low frequency magnetic fields. | four hundred domestic quail eggs (coturnix coturnix japonica) were used to study the possible teratogenic effects of extremely low frequency magnetic fields (elf-mfs) on early embryonic development. ten females were selected from a flock on the basis of their high fertility rate and low number of spontaneous abnormalities and they were selectivity maintained in nesting-boxes in a room where feeding and environmental conditions were carefully controlled. all the eggs used in the experiments were ... | 1995 | 7561392 |
| dietary nitroprusside alleviates atherosclerosis in hypercholesterolemic japanese quail (coturnix coturnix japonica). | male japanese quail (coturnix coturnix japonica), susceptible to cholesterol-induced atherosclerosis, were rendered hypercholesterolemic by feeding a diet containing 0.5% cholesterol in two experiments. half the animals also received a dietary supplement of sodium nitroprusside ranging in concentration from 0.005% to 0.015%. after 10 weeks on the diets, serum was obtained for cholesterol analysis, the animals were killed, and the aortae removed and examined for the presence of atherosclerotic le ... | 1995 | 7553329 |
| inherited muscular disorder in mutant japanese quail (coturnix coturnix japonica): relationship between the development of muscle lesions and age. | the progression of the pathological changes that occur in the skeletal muscle was examined in 19 japanese quail of the lwc strain, affected with an autosomal dominant inherited muscular disorder producing electrical myotonia. the muscle samples were obtained every 10 days from 20 to 70 days of age. muscle samples from 18 age-matched commercial quail were used as normal controls. characteristic histological lesions found in the skeletal muscles included sarcoplasmic masses, ringed fibres, interna ... | 1995 | 8543670 |
| effect of inducers and pcbs on the cytochrome p450 enzymes in cultured quail hepatocytes. | hepatocytes isolated from fetal quail livers (coturnix coturnix japonica) were cultured in vitro. their capacity to metabolize drugs and xenobiotics was explored with typical cytochrome p450 substrates: ethoxycoumarin (known to be metabolized by several p450s), ethoxyresorufin (essentially dealkylated by p450ia1), and testosterone (specifically hydroxylated at several positions by several p450s). the cells could be kept metabolically active in culture for at least 4 days. their drug-metabolizing ... | 1995 | 8521782 |
| metabolic adaptations induced by long-term fasting in quails. | after up to 21 days without food, adult male quails (coturnix coturnix japonica) lost about 45% of the initial body weight (100-150 g). as in naturally fast-adapted and larger birds, three phases were identified during prolonged fasting in quails. phase i lasted 2-3 days and was characterized by a rapid decrease in the rate of body weight loss and high fat mobilization. phase ii was longer and characterized by a slow and steady decline in the rates of body weight loss and of nitrogen excretion. ... | 1995 | 7614041 |
| bh (black at hatch) gene appears to cause whole-body hemorrhage in homozygous embryos of japanese quail (coturnix coturnix japonica). | genotypes of early embryos obtained from mating bh/+ quail were determined by chorio-allantoic membrane grafting of their thigh skin, and the development of the bh homozygous embryos was examined histologically. the bh homozygous embryos died at an early stage of development (after 7 to 10 days of incubation) with a very high incidence of whole-body hemorrhage (approximately 100%), but malformation of neural tubes was not always accompanied by bh homozygosity. degeneration of the liver was more ... | 1995 | 7722476 |
| mosaic lectin labelling in the quail collecting ducts. | morphological and histoenzymological differences have been observed between intercalated and principal cells of the quail coturnix coturnix japonica collecting ducts. the present study was designed to shed light on the lectin affinity of the collecting duct cells within cortex and medulla by the use of hrp-labelled lectins combined with glycosidase degradation. binding of pna and rca-i lectins consequent to enzymatic release of sialic acid revealed abundant sialylated carbohydrate moieties withi ... | 1995 | 7541264 |
| a quantitative investigation of gonadal feminization by diethylstilboestrol of genetically male embryos of the quail coturnix coturnix japonica. | the effect of diethylstilboestrol on gonad development in quail embryos has been quantitatively analysed. quail embryos at 4 days of incubation were treated with diethylstilboestrol (des), using the egg dipping method. at 10 days of incubation, embryos were removed and killed by decapitation. tissues were prepared for chromosome analysis, and the parts of the abdomen containing the gonads were prepared for serial sectioning and quantitative assessment. left gonads of des-treated male embryos res ... | 1995 | 7616493 |
| effects of insulin-like growth factor-i, estrogen, glucocorticoid, and transferrin on the mrna contents of ovalbumin and conalbumin in primary cultures of quail (coturnix coturnix japonica) oviduct cells. | the effects of estrogen, dexamethasone, insulin-like growth factor-i (igf-i), and transferrin on the messenger rna (mrna) contents of ovalbumin and conalbumin in primary cultures of quail oviduct cells were investigated. in the absence of one of the above hormones or factors, a decrease in ovalbumin mrna was prominent. in particular, removal of igf-i and transferrin caused a significant effect. studies using a combination of estrogen, dexamethasone, igf-i and transferrin indicated that igf-i coo ... | 1995 | 7599964 |
| photoperiodic activation of fos-like immunoreactive protein in neurones within the tuberal hypothalamus of japanese quail. | photoperiodic stimulation of quail (coturnix coturnix japonica) resulted in the appearance of a nuclear fos-like protein within neurones of the basal tuberal hypothalamus. on transfer to long days the number of neurones containing this fos-like immunoreactivity increased from about 150 to 700, the neurones being scattered throughout the length of the tubero-infundibular complex. this activation had occurred by early in the second long day and was maintained for at least three long days. over thi ... | 1995 | 7823310 |
| influence of dietary aflatoxin on eimeria uzura infection in japanese quail (coturnix coturnix japonica). | a study was conducted to assess the influence of dietary aflatoxin on eimeria uzura in japanese quail (coturnix coturnix japonica). quail receiving 1 part per million (ppm) of dietary aflatoxin b1 and inoculated with 10(5) sporulated oocysts of e. uzura gained significantly less weight than chicks receiving either aflatoxin or coccidia alone. increased morbidity, mortality and decreased efficiency of feed utilization were also evident. the combination of e. uzura infection and aflatoxicosis resu ... | 1995 | 7732641 |
| karyotypic analysis of three species of phasianidae (galliformes: aves). | the karyology of the partridges francolinus francolinus asiae (2n = 70) and f. pondicerianus interpositus (2n = 68) and the japanese quail coturnix coturnix japonica (2n = 78) was investigated. the frequency distribution of the diploid number of chromosomes was tabulated and the most frequent number was taken to be the diploid number. all species showed a bimodal karyotype and the variation in the number of chromosomes was attributed to the macrochromosomes, although twelve macrochromosomes were ... | 1995 | 7671640 |
| organophosphorus-induced delayed neurotoxicity: a comparative study of the effects of tri-ortho-tolyl phosphate and triphenyl phosphite on the central nervous system of the japanese quail. | the neurotoxic effects of single oral doses of tri-ortho-tolyl phosphate (totp) (500 mg/kg body weight) or single subcutaneous injections of triphenyl phosphite (tpp) (62.5-500 mg/kg body weight) were investigated in the japanese quail (coturnix coturnix japonica). oral doses of totp resulted in no detectable clinical signs while injections of tpp resulted in mild ataxia to severe paralysis depending upon the dosage level. at 24 hr postdosing, whole-brain activity of neuropathy target esterase ( ... | 1995 | 7603644 |
| triphenyl phosphite-induced neuropathy in the avian forebrain: a silver impregnation study of the visual and auditory systems of the japanese quail. | single subcutaneous injections of triphenyl phosphite (tpp) (62.5-500 mg/kg body weight) were made in the japanese quail (coturnix coturnix japonica). the extent and density of resultant central nervous system degeneration were mapped by using the fink-heimer silver impregnation method to selectively impregnate degenerating axons and terminals. in addition to resulting in degeneration in the medulla and cerebellum, exposure to tpp also resulted in axonal and terminal degeneration in specific mid ... | 1995 | 7603630 |
| in situ end labeling of fragmented dna in induced ovarian atresia. | apoptosis is studied in a model of induced follicular atresia in the ovary of japanese quail (coturnix coturnix japonica) by in situ end labeling of dna fragments in granulosa cells using two different techniques (incorporation of labeled nucleotides by dna polymerase i or terminal deoxynucleotidyl transferase). the most remarkable observation related to apoptosis in this model is the predominant cytoplasmic localization of labeled dna fragments, while dna fragmentation appears to be absent from ... | 2006 | 7654330 |
| morphometric analysis of the scleral bony ring with different numbers of ossicles in the eye of coturnix coturnix japonica. | the scleral bony ring (s.b.r.) of coturnix coturnix japonica was examined and evaluated morphometrically in its characteristic formations (scleral ossicles, overlapping sectors). the modal class 14-14, the most representative, was compared to others having minor or major numbers of ossicles with complex or simple overlaps in the left and right eyes. it was observed that the ossicles, numbered as in the literature, are ordered in a characteristic manner to form the s.b.r. the ossicle dimensions a ... | 1994 | 7978347 |
| molecular species analysis of glycosphingolipids from small intestine of japanese quail, coturnix coturnix japonica by hplc/fab/ms. | neutral glycosphingolipids were isolated from quail small intestine and their structures were analysed. they contained: gal beta 1-4glccer(laccer), gal alpha 1-4galcer(ga2cer), gal alpha 1-4gal beta 1-4glccer(gb3cer), glcnac beta 1-3gal beta 1-4glccer(lc3cer), galnac beta 1-4gal beta 1-4glccer(gg3cer), galnac beta 1-4[galnac beta 1-3] gal beta 1-4glccer(lcgg4cer), and galnac alpha 1-3galnac beta 1-3gal alpha 1-4gal beta 1-4glccer (forssman glycolipid) as well as glucosylceramide, galactosylceram ... | 1994 | 7804001 |
| blood esterase inhibition in birds as an index of organophosphorus contamination: field and laboratory studies. | : with the aim of developing a nondestructive biomarker (serum 'b' esterases) for monitoring bird populations exposed to azamethiphos s((6-chloro-2-oxooxazolo(4,5-b)pyridin-3(2h)-yl)methyl) 0,0-dimethyl phosphorothioate (9cl), parallel laboratory and field studies were performed. in japanese quail (coturnix coturnix japonica) treated with azamethiphos at 10 mg kg(-1), serum butyrylcholinesterase (bche) and carboxylesterase (ce) activities were inhibited by 88% and 35%, respectively, after 24 h. ... | 1994 | 24201863 |
| developing blood vessels and associated extracellular matrix as substrates for neural crest migration in japanese quail, coturnix coturnix japonica. | japanese quail embryos were used to examine paths of neural crest cell (nc) migration in relationship to the embryonic vasculature. immunolabeling for nc, angioblasts and the extracellular matrix (ecm) glycoproteins fibronectin (fn), laminin (ln) and tenascin (tn) revealed several instances where spatiotemporal patterns of nc migration coincide with the embryonic vascular pattern and its associated ecm. an in vitro model for angiogenesis was modified to include nc, and associations with "capilla ... | 1994 | 7521199 |
| retinal distribution of tyrosine hydroxylase immunoreactive cells in two strains of quails coturnix coturnix japonica. | we have compared the distribution of tyrosine-hydroxylase immunoreactive (th-i) somata in the retina of two strains of japanese quails, one normally pigmented and one hypopigmented mutant which develops a glaucoma, three months after their hatching. th-i cells were observed among amacrine and presumptive interplexiform cells in both strains. they were distributed in areas of decreasing densities from an area centralis, located in the central upper retina to the retinal periphery. we have arbitra ... | 1994 | 7914902 |
| spermiogenesis and spermiation in the japanese quail (coturnix coturnix japonica). | the ultrastructure of 12 steps of spermatid development and the process of spermiation are described for the japanese quail in order to clarify the classification proposed for determining the stages of the cycle of the seminiferous epithelium (lin et al. 1990) and to assess disagreements in the literature about sperm development in birds. it was concluded that acrosomal development involves the formation of proacrosomal granules which do not contain dense granules like the mammalian acrosome. ma ... | 1993 | 8300429 |
| different expression of calpain in skeletal muscle of japanese quail (coturnix coturnix japonica) lines selected for body weight. | calpain activity was determined by western blot analysis of steady-state concentrations of m-calpain (calpain requiring millimolar ca2+ for activation) and also by northern blot analysis of steady-state concentrations of mrna encoding m-calpain in three lines of quail: a random-bred control line (rr) and two lines selected for body weight, one for increased body weight (ll) and another for decreased body weight (ss). the m-calpain activities in skeletal muscle were higher in the ss line and lowe ... | 1993 | 8166622 |
| fine structure of merkel corpuscles in the lingual mucosa of japanese quail, coturnix coturnix japonica. | by electron microscopy, these corpuscles were found exclusively in the connective tissue just beneath the dorsal epithelium near the lateral margin of the tongue. each consisted of 4-8 merkel cells and flattened nerve terminals arranged alternately. the merkel cell was characterized by dense-cored granules, with a diameter ranging from 120 to 180 nm, throughout the cytoplasm. the functional significance of the avian merkel cell, i.e. a mechanoreceptor cell or a trophic cell with the axon, still ... | 1993 | 8297254 |