Publications
| Title | Abstract | Year Filter | PMID(sorted ascending) Filter |
|---|
| 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 |
| pulmonary macrophages in birds (barn owl, tyto tyto alba), domestic fowl (gallus gallus f. domestica), quail (coturnix coturnix), and pigeons (columbia livia). | birds have a limited number of resident macrophages in the normal steady-state respiratory tract. the discovery of phagocytes in lavages of lung from birds contrasts with findings that phagocytes are seldom seen in investigations in situ. an electron microscopic study was performed in the respiratory units, the parabronchi, and air capillaries in particular in several adult bird species to localize the seat of respiratory macrophages. | 1996 | 8876827 |
| serum concentrations of thyroid hormones during egg laying in two types of japanese quail (coturnix coturnix japonica). | in the present investigation a lighter white egg-type (l) and a heavier wild meat-type (m) of female japanese quails were compared with respect to egg production, body growth, abdominal fat pad, serum thyroxine (t4) and triiodothyronine (t3) concentrations, trh sensitivity and t4 5'-monodeiodinase activity in liver homogenates. during the investigation period l type layed considerably more eggs and m type was heavier in body weight. abdominal fat pad in l type quails was significantly higher tha ... | 1994 | 8891179 |
| disposition of metronidazole in hens (gallus gallus) and quails (coturnix coturnix japonica): pharmacokinetics and whole-body autoradiography. | hens were given single intravenous or oral doses (30 mg/kg body weight) of metronidazole and the plasma concentrations of the drug were determined by high-performance liquid chromatography (hplc) at intervals from 10 min to 24 h after drug administration. pharmacokinetic variables were calculated by the lagrange algorithm technique. the elimination half-life (t1/2 beta) after the intravenous injection was 4.2 +/- 0.5 h, the volume of distribution (vd(ss) 1.1 +/- 0.2 l/kg and the total body clear ... | 1996 | 8905568 |
| 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 |
| 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 |
| 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 |
| water transport in collecting ducts of japanese quail. | previously, we reported that the countercurrent urine concentration mechanism in birds appears to operate by recycling of a single solute (nacl), in which the thick ascending limb of looped nephrons provides an energy source. to determine the importance of the medullary collecting duct (mcd) in the countercurrent multiplier system, we examined in isolated and perfused mcds from japanese quail, coturnix coturnix, the osmotic and/or diffusional water permeability and whether arginine vasotocin (av ... | 1996 | 8997350 |
| epidemiology of inclusion body hepatitis in poultry in northern india from 1990 to 1994. | the epidemiology of inclusion body hepatitis (ibh) was studied in poultry in northern india, from april 1990 to march 1994, to evaluate the various factors responsible for causing and determining the severity of the disease. broiler chicks and japanese quail (coturnix coturnix japonica) were the species examined. the factor observed to be most commonly associated with ibh was the presence of aflatoxins in the feed at higher than permissible levels, i.e. 20 parts per billion. avian adenovirus-1 w ... | 1996 | 9025150 |
| changes in multiple brain regions underlie species differences in a complex, congenital behavior. | the evolutionary brain modifications that produce any complex, congenital behavioral difference between two species have never been identified. evolutionary processes may (i) alter a single, "higher" brain area that generates and/or coordinates the diverse motor components of a complex act; (ii) separately change independent, "lower" brain areas that modulate the fine motor control of the individual components; or (iii) modify both types of areas. this study explores the brain localization of a ... | 1997 | 9050894 |
| changes in serum triiodothyronine, thyroxine, estradiol-17 beta, progesterone levels and egg production in hypocholesterolemia induced japanese quails coturnix coturnix japanica. | mature healthy female japanese quails injected (i.p.) with gemfibrozil at two dose levels for 1,2,3 and 4 weeks induced hypocholesterolemia as observed by the serum cholesterol concentration which was more severe with the higher dose. liver and ovarian cholesterol contents decreased in 3rd and 4th week of the treatment. significant (p > 0.05) increase in serum triiodothyronine (t3) and thyroxine (t4) level were observed between 3rd and 4th week while serum estradiol-17 beta and progesterone leve ... | 1996 | 9055651 |
| 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 |
| 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 |
| c-fos expression in the putative avian suprachiasmatic nucleus. | c-fos induction was investigated as a potential component in the avian photic entrainment pathway and as a possible means of locating the central pacemaker in birds. in both quail (coturnix coturnix japonica) and starlings (sturnus vulgaris) exposure to 1 h of light induced fos-lir in the visual suprachiasmatic nucleus but not in the medial suprachiasmatic nucleus. however, the degree of c-fos induction in the visual suprachiasmatic nucleus was similar at different circadian times despite the fa ... | 1997 | 9163930 |
| oxygen consumption and vital organ masses in young growing quail (coturnix coturnix japonica). | 1997 | 9179319 | |
| 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 |
| perceptual compensation for coarticulation by japanese quail (coturnix coturnix japonica). | when members of a series of synthesized stop consonants varying in third-formant (f3) characteristics and varying perceptually from /da/ to /ga/ are preceded by /al/, human listeners report hearing more /ga/ syllables than when the members of the series are preceded by /ar/. it has been suggested that this shift in identification is the result of specialized processes that compensate for acoustic consequences of coarticulation. to test the species-specificity of this perceptual phenomenon, data ... | 1997 | 9265760 |
| 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 |
| quail cystatin: isolation and characterisation of a new member of the cystatin family and its hypothetical interaction with cathepsin b. | quail cystatin, a new cysteine proteinase inhibitor protein of the cystatin superfamily, was purified from egg albumen of japanese quail coturnix coturnix japonica. amino acid sequencing and mass spectrometry revealed the complete 116 amino acid residue primary structure of a phosphorylated form (13,173 da). the inhibitor has a 90% sequence identity with chicken cystatin. its interaction with papain is rapid and tight (ki = 4.4 pm; k(on) = 1.8x10(7) m(-1) s(-1); k(off) = 0.8x10(-4) s(-1)) and ve ... | 1997 | 9276465 |
| effect of growth rate and body mass on resting metabolic rate in galliform chicks. | in this study, we asked whether within-species variation in chick resting metabolic rate was related to variation in growth and whether this relationship changed during development in three galliform species (turkey, meleagris gallopavo, guinea fowl, numida meleagris, and japanese quail, coturnix coturnix japonica). resting metabolic rate increased by a bi- or triphasic pattern with body mass. for each phase, the relationship between metabolic rate and growth was studied by residual analysis, wi ... | 1997 | 9279916 |
| growth rate of different sexes of the european quail (coturnix coturnix). | 1. the gompertz equation was used to described the growth of the european quail (coturnix coturnix) from hatching until 107 d of age. 2. differences (p< 0.05) in growth existed between sexes. mature mass values of 148.0 +/- 3.00 and 191.9 +/- 5.35 g respectively were found for males and females. males reached maximum growth at 13.4 +/- 0.33 d while a value of 16.4 +/- 0.46 d was found for females. 3. a plateau in daily food intake was reached when the time of mature mass was approached. | 1997 | 9280362 |
| 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 |
| 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 |
| transport characteristics of the colonic epithelium of the japanese quail (coturnix coturnix). | the colon of the domestic fowl sustains a reabsorptive na+ current on both high- and low-sodium diets. however, there is a marked shift in the apical transport step under these two extreme conditions, from amino acid/hexose cotransport on high-salt diets to amiloride-sensitive na+ channels on low-salt diets. the present experiments were performed to study colonic na+ transport in another galliform species, the japanese quail (coturnix coturnix). birds were maintained on a commercial game feed co ... | 1997 | 9366053 |
| 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 |
| proteolytic enzymes in yolk-sac membrane of quail egg. purification and enzymatic characterisation. | degradation of yolk protein is essential for the early development of the avian embryo. in japanese quail (coturnix coturnix japonica), proteolysis in the surrounding tissue of the yolk, the yolk-sac membrane, can be inhibited by class-specific inhibitors of cysteine proteinases as well as of aspartic proteinases. purification of the enzymes leads to one cysteine proteinase and one aspartic proteinase with an apparent molecular mass of 29 kd and 44 kd, respectively. both enzymes were purified in ... | 1997 | 9418005 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 | |
| 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 |
| 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 |
| host specificity of amblyomma cajennense (fabricius, 1787) (acari: ixodidae) with comments on the drop-off rhythm. | the parasitic specificity of larval, nymph and adult amblyomma cajennense on six different host species: oryctolagus cuniculus, rattus norvegicus, gallus gallus domesticus, anas platyrhynchus, coturnix coturnix and streptopelia decorata is described. in terms of the numbers of larvae and nymphs recovered, o. cuniculus was the best host species. the modal day for drop-off of larvae and nymphs was day three for the mammal hosts, but variable in the birds. we conclude that adult a. cajennense have ... | 1998 | 9698869 |
| an sem and tem study of the transition of the bronchus to the parabronchus in quail (coturnix coturnix). | the main objective was to analyse the transition of the bronchus to the parabronchus in birds and to describe its specific structure in an integrated light microscopic, transmission electron microscopic (tem) and scanning electron microscopic (sem) study. lung tissue from immature and mature quail was subjected to standard processing for paraffin light microscopy, tem and sem after intratracheal inflation with fixative. in transverse paraffin and durcupan semithin sections, the partition incompl ... | 1998 | 9728268 |
| 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 |
| 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 |
| the development and differentiation of the parabronchial unit in quail (coturnix coturnix). | the present study has been inspired by the conflicting data in the relevant literature concerning the embryogenesis of cell types of the parabronchial epithelium and the formation, discharge and distribution of trilaminar substance and lamellar bodies. lung tissue from embryonic, newly hatched, immature and mature quail was subjected to standard processing for light and transmission electron microscopy. the parabronchial rudiments form shallow primitive atria on embryonic day 13. the precursors ... | 1998 | 10099950 |
| 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 |
| 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 |
| 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 |
| corticotropin-releasing hormone-immunopositive nerve elements in apposition to chicken gonadotropin-releasing hormone i-containing perikarya in japanese quail (coturnix coturnix japonica) brain. | the neuroanatomic basis of how stress inhibits reproduction in birds is not understood. to address this question we used double-label immunofluorescence histochemistry to determine whether corticotropin-releasing hormone (crh)-immunoreactive (ir) neuronal elements contact chicken gonadotropin-releasing hormone i (cgnrh i)-ir somata in brains of japanese quail. the double-label system used a sheep anti-cgnrh i primary antibody with a secondary antibody conjugated to dichlorotriazinylaminofluoresc ... | 1999 | 10470492 |
| outbreak of septicaemic colibacillosis in japanese quail (coturnix coturnix japonica). | we have carried out an aetiological and pathological study of an outbreak of septicaemia caused by the o165 serogroup of escherichia coli in japanese quail (coturnix coturnix japonica) which resulted in high mortality (90%). after treatment with amoxicilin in drinking water (200 mg/l), morbility and mortality rates dropped markedly. microbiological studies showed that the organism responsible was an atypical e. coli strain, on the basis of the non-fermentation of lactose (onpg-), which belonged ... | 1999 | 10481623 |
| a scanning and transmission electron microscopy study of the parabronchial unit in quail (coturnix coturnix) and town pigeons (columba livia). | a combined scanning electron (sem) and transmission electron microscopy (tem) investigation was undertaken to gain insight into the complex structural pattern of the atrial compartment and the gas exchange tissue of parabronchial units in quail and town pigeons. the aim was also to depict the changes taking place in the parabronchial unit in the late prehatching and early posthatching periods in quail. the standard sem and tem investigation was carried out in 13 mature quail and 8 town pigeons. ... | 1999 | 10483882 |
| 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 |
| growth, developmental stability and immune response in juvenile japanese quails (coturnix coturnix japonica). | stresses are environmental factors which restrict growth or cause a potentially adverse change in an organism. the exposure of developing organisms to environmental stresses may have several physiological consequences including a decrease in immunocompetence. however, mounting an immune response against a foreign antigen may in itself constitute a cost for developing organisms. this cost has potentially long-term consequences for adult function and fitness. this study examines the growth and dev ... | 1999 | 10518322 |
| 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 |
| ultrastructural observations of the neurocytes in pterygopalatine ganglion of japanese quail (coturnix coturnix v. japonica). | cells of the pterygopalatine ganglion in quail are elliptical, oval and often spindle shape. they have single nuclei, which are spindle or lentiform in shape. the rough endoplasmic reticulum was observed in a great amount, especially in the vicinity of nucleus. it was organised in structure corresponding to nissl's body. the mitochondria are present mainly at the periphery of the cells. several flat, elongated cisterns form the golgi apparatus. there are a few lysosomes, mostly primary ones. pro ... | 1999 | 10598402 |
| 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 |
| kinematics and mechanics of ground take-off in the starling sturnis vulgaris and the quail coturnix coturnix. | the mechanics of avian take-off are central to hypotheses about flight evolution, but have not been quantified in terms of whole-body movements for any species. in this study, i use a combination of high-speed video analysis and force plate recording to measure the kinematics and mechanics of ground take-off in the european starling sturnis vulgaris and the european migratory quail coturnix coturnix. counter to hypotheses based on the habits and morphology of each species, s. vulgaris and c. cot ... | 2000 | 10648214 |
| three-dimensional analysis of dna replication foci: a comparative study on species and cell type in situ. | chromatin morphology of interphase nuclei in most cell lines of quail (coturnix coturnix japonica) and chick (gallus gallus domesticus) embryos shows typical interspecies differences. this intrinsic marker has been used in quail/chick chimerisation experiments, where also differences between cell types were noted. we asked whether similar differences between species and between cell types could be observed in s phase nuclei in situ. in this report, we used bromodeoxyuridine (brdu) pulse labellin ... | 2000 | 10817674 |
| lamellar inclusions and trilaminar substance in the parabronchial epithelium of the quail (coturnix coturnix). | the fine structure of the epithelial cells of the parabronchus and their secretory products have been the subject of many studies and have given rise to considerable controversy about their configuration and ultrastructure. the aim of the present study was to investigate the mode of formation and discharge of lamellar bodies of granular cells and the trilaminar substance produced and discharged by the embryologically related squamous atrial and respiratory epithelial cells. the material for ligh ... | 2000 | 10836095 |
| 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 |
| effects of lighting conditions and melatonin supplementation on the cellular and humoral immune responses in japanese quail coturnix coturnix japonica. | two experiments were conducted to determine the effects of lighting conditions and melatonin supplementation on the cellular and humoral immune responses in japanese quail. the first experiment was designed to evaluate differing light regimes as immune modulators in both adult and juvenile quail. the cellular and humoral immune responses were determined for three lighting conditions; short days (8:16ld), long days (16:8ld), and constant light (ll). in the second experiment, melatonin was adminis ... | 2000 | 10882554 |
| growth and muscle characteristics of a growth selected line of japanese quail (coturnix coturnix japonica), a control line and reciprocal crosses between them. | body growth, muscle growth, bone growth, and measurements of muscle fiber area and fiber number were made in a line of japanese quail (coturnix coturnix japonica) selected for high 4 week body weight for 100 generations (line pp), in the control line from which they were derived (line cc), and in genetically equivalent reciprocal crosses (pc and cp) that develop in eggs that differ greatly in weight. there was no difference in body weight or weight of the p. superficialis of newly hatched cc or ... | 2008 | 10885856 |
| 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 |
| application of an anti-hqigy antibody for the measurement of igy concentrations of hen's and quail's serum and yolk. | the development of a sensitive elisa for the measurement of quail igy (qigy) was the main purpose of our study. the suitable antibody (ab) was prepared in rabbits. both quail igy (qigy) and hen igy (higy) were precipitated by this developed ab. for this reason it was marked as anti-hen-quail-igy (a-hqigy). the purified ab was conjugated with horseradish peroxidase (ahqigy-hrp) and a sensitive direct elisa was developed, based on this labeled ab. the prepared ahqigy ab which was used in this deve ... | 1999 | 10943656 |
| characterization and chromosomal distribution of a novel satellite dna sequence of japanese quail (coturnix coturnix japonica). | a novel satellite dna sequence of japanese quail (coturnix coturnix japonica) was isolated from genomic dna digested with restriction endonuclease, bg/ii. sequence analysis of three different-size clones revealed the presence of a tandem array of a gc-rich 41 bp repeated element. this sequence was localized by fluorescence in situ hybridization (fish) primarily to microchromosomes of japanese quail (2n = 78); approximately 50 of the 66 microchromosomes showed positive signals, although hybridiza ... | 2000 | 10994713 |
| 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 |
| transactivation of latent marek's disease herpesvirus genes in qt35, a quail fibroblast cell line, by herpesvirus of turkeys. | the qt35 cell line was established from a methylcholanthrene-induced tumor in japanese quail (coturnix coturnix japonica) (c. moscovici, m. g. moscovici, h. jimenez, m. m. lai, m. j. hayman, and p. k. vogt, cell 11:95-103, 1977). two independently maintained sublines of qt35 were found to be positive for marek's disease virus (mdv)-like genes by southern blotting and pcr assays. sequence analysis of fragments of the icp4, icp22, icp27, vp16, meq, pp14, pp38, open reading frame (orf) l1, and glyc ... | 2000 | 11024146 |
| [the electrical activity of the hypothalamic arcuate nucleus and the morphofunctional characteristics of the gonads in birds during blockade and stimulation of the beta-adrenergic receptors]. | beta-adrenoreceptors agonist isadrine as shown by measurement of hypothalamic arcuate nucleus (an) summary electrical activity and by morphometry of its neurons and testis does not result in significant acceleration of maturation in maturing (4-6 week old) male japanese quails (coturnix coturnix japonica). anapryline-induced blockade of beta-adrenoreceptors leads to small inhibiting of the reproductive complex. this findings confirm our previous works, according to which brain beta-adrenergic sy ... | 2000 | 11059385 |
| circadian rhythm of activity during the annual phases in the european quail, coturnix coturnix. | migratory birds, such as the european quail, present an annual cycle with the following phases: moult, fattening, migration and reproduction. this study aimed at determining how variations in the circadian rhythm of feeding during the annual cycle took endogenous rhythmic characteristics into account. the birds (n = 8) were maintained under constant dim light from the age of 1 to 9 months. feeding activity was recorded using infra-red detectors. the birds expressed all the phases, except migrati ... | 2000 | 11072624 |
| 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 |
| ultrastructural study of the luminal surface of the ducts of the epididymis of gallinaceous birds. | the various ducts of the epididymides of four gallinaceous birds, the turkey (meleagris gallopavo), domestic fowl (gallus gallus), guinea-fowl (numida meleagris) and japanese quail (coturnix coturnix japonica) were studied at the scanning and transmission electron microscopy levels. the tissues were fixed either by immersion or vascular perfusion, for comparative purposes. each duct system, save for a few details, presented similar morphological features in all species. the epithelial surface of ... | 2000 | 11131120 |
| cloning of complementary deoxyribonucleic acids encoding quail (coturnix coturnix japonica) retinoic acid receptor ss isoforms and changes in their gene expression during gonadotropic growth. | retinoids have important effects on the development of the reproductive system, where they act via their specific nuclear receptors: retinoic acid receptors (raralpha, ss, gamma) and retinoid x receptors (rxralpha, ss, gamma). the research reported here was conducted in an effort to clone quail rarbeta+ cdna (qrarbeta) and to evaluate the expression of qrarbeta+ mrnas in different tissues and during the development of gonadotropic organs. two complete cdnas of qrarbeta1 and qrarbeta2 were isolat ... | 2001 | 11133679 |
| cardiomyocyte ploidy levels in birds with different growth rates. | cytofluorimetric study of ploidy levels in ventricular cardiomyocytes was carried out on 36 adult bird species belonging to 10 orders as well as on the quail coturnix coturnix, of different ages. it was shown that polyploidization of quail cardiomyocytes occurs during the first 40 days after hatching and ends by the time growth is completed. in adult birds, the cardiomyocyte ploidy hardly changed at all. interspecies comparison revealed that in the adult bird myocardium 2cx2 myocytes are predomi ... | 2001 | 11169492 |
| 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 |
| a study of helical and planar waves on sea urchin sperm flagella, with a theory of how they are generated. | when the spermatozoon of echinus esculentus swims in sea water containing methyl cellulose (viscosity 1.5--4 pa s), its flagellum may generate either a helical or a planar waveform, each type being stable. the helical wave, which is dextral, is complicated by the concurrent passage of miniature waves along it. these miniature waves have a pulsatile origin in the neck region of the spermatozoon. our videotape analysis indicates that there are two pulses of mechanical activity for each true cycle ... | 2001 | 11249842 |
| effect of melatonin supplementation on the sexual development in european quail (coturnix coturnix). | at the end of their wintering phase, male european quails were exposed to a stimulation photoperiod of light/dark 12:12 h for 10 days to induce sexual development. a daily oral melatonin supplementation was then given to one group of treated males (n=11) and the alcohol solvent was given to a control group of males (n=10). these solutions were provided during the final 3 h of the photophase for 28 days, then during the final 4 h for 18 days. there were no significant differences between the two ... | 2001 | 11254999 |
| 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 |
| 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 |
| [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 |
| [classification of the forebrain striatum neurons in birds]. | polymorphism of neurons in the basic fields of the forebrain striatum of birds was described using specially developed classification of neurons in nissl preparations. birds with different degrees of development of elementary rational activity were studied: corvus monedula, columba livia, coturnix coturnix, and melopsittacus undulatus. according to the proposed method, the neurons were classified in 3 basic types and 2 additional, 6 subtypes and 26 classes. it was found that in the higher brain ... | 2001 | 11605427 |
| isolation of pasteurella multocida during an outbreak of infectious septicemia in japanese quail (coturnix coturnix japonica). | in may 1994, about fifty japanese quails out of ninety being bred for experimental purposes at miyazaki university died of acute septicemia within a few days. at autopsy, there were no gross pathological lesions, however, severe bacteremia was observed in all cases. bacterial examination revealed the presence of pasteurella multocida in blood and several organs in pure culture and they were of carter's capsular type a, heddleston's type 3-4 and namioka's type o-8-9. the ld50 of bacteria in quail ... | 2001 | 11642279 |
| exceptional cellular resistance to oxidative damage in long-lived birds requires active gene expression. | previous studies indicated that renal tubular epithelial cells from some long-lived avian species exhibit robust and/or unique protective mechanisms against oxidative stress relative to murine cells. here we extend these studies to investigate the response of primary embryonic fibroblast-like cells to oxidative challenge in long- and short-lived avian species (budgerigar, melopsittacus undulatus, longevity up to 20 years, vs japanese quail, coturnix coturnix japonica, longevity up to 5 years) an ... | 2001 | 11682567 |
| 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 |
| combined effects of experimental heavy-metal contamination (cu, zn, and ch3hg) and starvation on quail's body condition: parallelism with a wild common guillemot (uria aalge) population found stranded at the belgian coast. | combined effects of heavy-metal contamination (cu, zn, and ch3hg) and starvation were tested on common quails (coturnix coturnix japonica) and used as a model for comparison with a wild common guillemot (uria aalge) population found stranded at the belgian coast. appropriate heavy-metal levels were given to the quails to obtain concentrations similar to those found in the seabirds's tissues. the contaminated animals were then starved for 4 d to simulate the evident malnutrition symptoms observed ... | 2001 | 11697781 |
| 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 |
| physiological, growth, and immune responses of japanese quail chicks to the multiple stressors of immunological challenge and lead shot. | exposure to the combination of a contaminant and an immunological challenge during development may greatly increase the impact of either or both of these stressors on an individual. this study investigated the interacting effects of a nonpathogenic immunological challenge and lead shot exposure early in the development of a precocial species. seventy-one quail (coturnix coturnix japonica) chicks orally received either one #9 lead shot (0.05 g), four lead shots (0.2 g), or no lead at the age of 8 ... | 2002 | 11706371 |
| 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 |
| amplification of sequence tagged sites in five avian species using heterologous oligonucleotides. | short of a complete genomic dna sequence, sequence tagged sites (stss) have emerged as major genomic reagents for the genetic analysis of little-studied ecologically and agriculturally important organisms. here, we report sts developed for the turkey (meleagris gallopavo), guinea fowl (numidea meleagris), japanese quail (coturnix coturnix) and pigeon using primers specific for reference dna sequences of two chicken (gallus gallus) genes, aggrecan (agc1) and type x collagen (col10). additional st ... | 2000 | 11766842 |
| 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 |
| biological suppression of aflatoxicosis in japanese quail (coturnix coturnix japonica) by dietary addition of yeast (saccharomyces cerevisiae). | the amelioration of aflatoxicosis in japanese quails was examined by the dietary addition of live yeast (saccharomyces cerevisiae; sce). yeast incorporated into the diet at 1 g kg(-1) was evaluated for its ability to reduce the deleterious effects of 2.5 mg total aflatoxin (af; 82.30 per cent afb1, 2.06 per cent afb2, 7.68 per cent afg1 and 7.96 per cent afg2) kg(-1)diet on growing japanese quail chicks from 10 days to 45 days of age. forty 10-day-old japanese quail chicks were assigned to 2x2 f ... | 2001 | 11798296 |
| 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 |
| 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 |
| expression of kin, a nuclear protein binding to curved dna, in the brain of the frog (rana esculenta), turtle (trachemys scripta), quail (coturnix coturnix) and mouse (mus musculus). | the distribution of kin protein, the vertebrate homologue of the bacterial reca nuclear protein involved in illegitimate recombinant dna repair and gene regulation, was analysed in the brain of the mouse, quail, turtle and frog by immunocytochemical methods. the protein was expressed in all brains, but not in a uniform manner. immunoreactivity was absent from major fibre tracts. in the cerebral nuclei, immunolabelling in the various species showed an important variation. a comparative analysis, ... | 2002 | 11875664 |
| neuroendocrine epithelial cells in the broncho-parabronchial transition of embryonic, immature and mature quail (coturnix coturnix). | the main objective of this integrated light microscopic, transmission and scanning electron microscopic study was to describe in greater detail the structural pattern and developmental stages of pulmonary neuroendocrine epithelial cells (pnecs) in the broncho-parabronchial transition (bpt) of both developing and mature quail. in mature quail the bpt appeared as a diaphragm opening into the parabronchial vestibulum. perpendicular sections revealed two bilayered crest-like entrance folds invested ... | 2001 | 11880935 |
| 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 |
| chromium supplementation can alleviate negative effects of heat stress on egg production, egg quality and some serum metabolites of laying japanese quail. | this study was conducted to determine the effects of cr (chromium picolinate, crpic) supplementation at various levels (0, 200, 400, 800 or 1200 microg/kg of diet) on egg production, egg quality and serum concentrations of insulin, corticosterone and glucose in laying japanese quail (coturnix coturnix japanica) reared under conditions of heat stress (32.5 degrees c). laying japanese quail (n = 150; 45 d old) were divided into five groups of 30 birds. the quail were fed either a control diet cont ... | 2002 | 12042444 |
| 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 |
| 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 |
| steroid modulation of muscarinic cholinergic and alpha2-adrenergic receptor density in the nucleus intercollicularis of the japanese quail. | androgen modulation of neurotransmitter receptor density was investigated in the nucleus intercollicularis (ico) of male and female japanese quail (coturnix coturnix japonica). ico appears to play an important role in the neural control of testosterone (t) dependent vocal behaviour. two receptor types were investigated in this nucleus; muscarinic cholinergic receptors, labelled using [3h]n-methyl scopolamine (nms) as the ligand, and alpha2-adrenergic receptors, labelled using [3h]p-amino-clonidi ... | 1990 | 12106090 |
| 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 |
| 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 |
| expression of s-100 protein in intercalated duct cells of bovine pancreas. | although mutoh et al. have found intercalated ducts in the pancreatic islets of avians, including the chicken, moorhen (gallinula chloorpus), and japanese quail (coturnix coturnix japonica), and even demonstrated the functions of intercalated duct cells in pancreatic islets, to our knowledge, there have been only a few reports on the relationship between intercalated ducts and islets in mammalia. accordingly, in this study, we investigated whether intercalated ducts are morphologically related t ... | 2002 | 12126053 |