| stimulus contingency and the malleability of species-typical auditory preferences in northern bobwhite (colinus virginianus) hatchlings. | precocial avian hatchlings are typically highly social and show strong species-typical preferences for the maternal calls of their own species. the influence of social contingencies on the acquisition of species-specific preferences has, however, largely been neglected. we found that exposing bobwhite (bw) quail chicks to a japanese quail (jq) call contingent on their own vocalizations for 5 min was sufficient to eliminate their species-typical preference for the bw maternal call. yoked, noncont ... | 2008 | 18551463 |
| effects of 2 g hypergravity exposure on bobwhite (colinus virginianus) and japanese quail (coturnix coturnix japonica). | we compared reproductive fitness and early postnatal growth of bobwhite (colinus virginianus) and japanese (coturnix coturnix japonica) quail incubated and hatched during 2 g centrifugation. fertilized bobwhite and japanese quail eggs were placed in portable incubators on the 8-ft international space station test bed (isstb) centrifuge at nasa ames research center. the quail eggs were incubated throughout hatching and reared until postnatal day (p)4 at either 1.0, 1.2 or 2.0 g. two days before h ... | 2004 | 16240529 |
| the use of japanese and bobwhite quail as indicator species in avian toxicity test. ecpa/gifap environmental round table. | a comparative analysis was made between the toxicity of plant protection products to two species of quail used in regulatory testing. it was shown that in general differences in the sensitivity between bobwhite quail and japanese quail were small, and not statistically significant. it was therefore concluded that both species should be seen as equally suitable models for avian safety assessment. the mutual acceptance of studies carried out on either of these species for us and ec registration pr ... | 1995 | 7728512 |
| characterization of the toxicity of the mycotoxins aflatoxin, ochratoxin, and t-2 toxin in game birds. iii. bobwhite and japanese quail. | bobwhite and japanese quail were fed diets containing 1.25, 2.50, or 5.00 ppm aflatoxin; 1, 2, or 4 ppm ochratoxin a (oa); or 4, 8, or 16 ppm t-2 toxin. aflatoxin induced mortality in bobwhites during the second and third week with 1.25 ppm (10%), 2.50 ppm (30%), and 5.00 ppm (40%), and during the same period with t-2 toxin at 8 ppm (20%) and 16 ppm (22.5%). body weights of bobwhite quail were significantly decreased by the two higher levels of aflatoxin by 2 weeks of age, and by the two higher ... | 2013 | 1567307 |
| immunological-chromatographic analysis of lysozyme variants. | immunological-chromatographic analysis (ica) was used to evaluate the cross-reactivities of eight lysozyme variants with five different immobilized monoclonal anti-hen-egg-white lysozyme antibodies. ica is a dual-column high-performance liquid chromatography-based method in which an immunoaffinity and a conventional analytical column are coupled with a switching valve. antigens are first captured on the affinity column and then desorbed and concentrated on the second column, where they are separ ... | 1989 | 2777977 |
| the synchronisation of hatching in quail embryos: aspects of development affected by a retarding stimulus. | one hundred twenty-eight quail embryos were tested in 33 groups. in each group one egg was stimulated with sounds at a rate known to delay hatching (0.9 clicks/second). in groups of bobwhite quail, stimulation began three days or two days before hatching, and three days before hatching in groups of japanese quail. all eggs were incubated separately and respiration was monitored to indicate 1) the onset of lung ventilation, 2) the time when the egg began to click, and 3) the hatching time. in one ... | 1984 | 6736887 |
| performance of two species of quail on basic reinforcement schedules. | two bobwhite quail (colinus virginianus) and two japanese quail (coturnix coturnix japonica) were trained to peck a response key to obtain food. in general, performance on fixed ratio 20 and variable- and fixed-interval 60-sec schedules was comparable to the response patterns of other species under these schedules. | 1968 | 5645877 |
| three-dimensional organisation of rna-processing machinery in avian growing oocyte nucleus. | chromosome architecture and assorted nuclear compartments play an essential role in rna transcription and processing. growing vertebrate oocytes represent an advantageous model to study the principles of nuclear structure and function. in this article, the data on three-dimensional (3d) organisation of intact and non-deformed oocyte nuclei (germinal vesicles) in four species of birds (domestic chicken, japanese quail, rock pigeon and chaffinch) obtained by confocal laser scanning microscopy are ... | 2012 | 23318709 |
| immunoreactive endothelin in plasma of nonmammalian vertebrates. | immunoreactive endothelin (ir-et) was estimated in plasma of nonmammalian vertebrates, using radioimmunoassay (ria) for endothelin-1 (et-1). blood samples were collected from unanesthetized animals. plasma et was determined by ria after extraction. plasma levels of ir-et were 0.7 +/- 0.2 pg/ml (n = 6) in the hagfish eptatretus burgeri, 4.3 +/- 0.9 pg/ml (n = 5) in the banded dogfish triakis scyllia, 3.6 +/- 0.8 pg/ml (n = 3) in the common japanese conger conger myriaster, 9.6 +/- 1.4 pg/ml (n = ... | 1991 | 1725396 |
| evidence for altered structure and impaired mitochondrial electron transport function in selenium deficiency. | selenium (se) deficiency in the experimental models, coturnix coturnix japonica and corcyra cephalonica, resulted in impaired mitochondrial substrate oxidations and lowered thiol levels. studies with respiratory inhibitors confirmed reduced mitochondrial electron transport enzyme activities, especially at cytochrome c oxidase (cox), the terminal segment. enhanced mitochondrial lipid peroxidation in se deficiency was more pronounced in the heart tissue of the quail compared to other tissues. glut ... | 1996 | 8727670 |
| pairing behavior of the monogamous king quail, coturnix chinensis. | animals with socially monogamous mating systems are valuable for discovering proximate mechanisms of prosocial behavior and close social relationships. especially powerful are comparisons between related species that differ in monogamous tendency. birds are the most socially monogamous vertebrates. thus far most research on mechanisms of pairing has used zebra finches, which do not have a relative with a different mating system, however. the goal of the experiments reported here was to develop a ... | 2016 | 27257681 |
| culture system for embryos of blue-breasted quail from the blastoderm stage to hatching. | the blue-breasted quail (coturnix chinensis), the smallest species in the order galliforms, is a candidate model animal for avian developmental engineering because it is precocious and prolific. this species requires 17 days to hatch and 8 to 9 weeks to mature to an adult body weight of about 50 g, whereas the japanese quail (coturnix japonica) requires 16 days to hatch and 6 to 8 weeks to mature to an adult body weight of 100 to 150 g. the early embryo is the most challenging embryonic stage in ... | 2005 | 15725676 |
| excalfactoria quail as a new laboratory research animal. | chinese painted quail (excalfactoria chinensis), which is sometimes reared as a bird for pleasure, appears to be an excellent candidate for a laboratory research animal. handling and general care of this species are very easy because of its small body size and hardiness. the body weight (mean +/- sem) of the newly hatched chick, adult male, and adult female is 3.93 +/- .05, 47.66 +/- .52, and 55.89 +/- .75 g, respectively; that is, approximately half the size of japanese quail (coturnix coturnix ... | 1994 | 8072918 |
| are farm-reared quails for game restocking really common quails (coturnix coturnix)?: a genetic approach. | the common quail (coturnix coturnix) is a popular game species for which restocking with farm-reared individuals is a common practice. in some areas, the number of released quails greatly surpasses the number of wild breeding common quail. however, common quail are difficult to raise in captivity and this casts suspicion about a possible hybrid origin of the farmed individuals from crosses with domestic japanese quail (c. japonica). in this study we used a panel of autosomal microsatellite marke ... | 2012 | 22701745 |
| octopus gonadotrophin-releasing hormone: a multifunctional peptide in the endocrine and nervous systems of the cephalopod. | the optic gland, which is analogous to the anterior pituitary in the context of gonadal maturation, is found on the upper posterior edge of the optic tract of the octopus octopus vulgaris. in mature octopus, the optic glands enlarge and secrete a gonadotrophic hormone. a peptide with structural features similar to that of vertebrate gonadotrophin-releasing hormone (gnrh) was isolated from the brain of octopus and was named oct-gnrh. oct-gnrh showed luteinising hormone-releasing activity in the a ... | 2009 | 19210294 |
| energetic trade-offs between immunity and reproduction in male japanese quail (coturnix coturnix). | we investigated a postulated trade-off between reproduction and immune function by comparing the energetic costs of an immune response with phytohemagglutinin challenge (or injection) in castrated (low testosterone [t]) and intact (high t) japanese quail (coturnix coturnix). intact birds had higher resting metabolic rate (rmr) and significantly lower immune response than castrates. rmr of intact birds did not change in response to an immune challenge, suggesting that maintenance of reproductive ... | 2007 | 17647272 |
| gross morphological and histological features of larynx, trachea and syrinx in japanese quail. | this study aimed at observing gross morphological and histological characteristics of the larynx, trachea and syrinx in coturnix coturnix japonicum (japanese quail). sixteen mature quails were divided into two groups. eight animals were stained with 0.1% methylene blue for 15 min, followed by 50% and 70% ethyl alcohol solution for gross morphological examination. for the observation of histological characteristics the larynx, trachea and syrinx were fixed in 10% formaldehyde and embedded in para ... | 2007 | 17535355 |
| effects of dietary combination of chromium and biotin on egg production, serum metabolites, and egg yolk mineral and cholesterol concentrations in heat-distressed laying quails. | chromium picolinate is used in the poultry diet because of its antistress effects in addition to the fact that the requirement for it is increased during stress. this study was conducted to determine if the negative effects of high ambient temperature (34 degrees c) on egg production, egg quality, antioxidant status, and cholesterol and mineral content of egg yolk could be alleviated by combination of chromium picolinate and biotin (0.6/2.0; diachrome, as formulated by nutrition 21 inc.), in lay ... | 2004 | 15557680 |
| vitamin e supplementation can alleviate negative effects of heat stress on egg production, egg quality, digestibility of nutrients and egg yolk mineral concentrations of japanese quails. | the aim of this study was to determine if the negative effects of high ambient temperature (34 degrees c) on egg production, egg quality, digestibility of nutrients, and mineral content of egg yolk could be alleviated by dietary vitamin e (dl-alpha-tocopheryl acetate) supplementation in laying japanese quails (coturnix coturnix japanica). japanese quails (n=240; 7-week-old) were divided into eight groups, 30 birds per group. the quails were fed either a basal diet or the basal diet supplemented ... | 2002 | 12443690 |
| 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 |
| 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 |
| 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 |
| control of sodium and chloride transport in the thick ascending limb in the avian nephron. | we previously reported that birds may concentrate urine by a countercurrent multiplier mechanism using single-solute (nacl) recirculation, in which the thick ascending limb of henle (tal) of mammalian-type nephrons provides an energy source. the japanese quail tal has a higher lumen-to-bath cl flux (jcl,lb) than that of mammals; the mechanism for maintaining the osmotic gradient along the medullary cone is unknown. we investigated whether salt delivery alters the nacl reabsorption rate in the ta ... | 1994 | 8067454 |
| effects of handling and pair management on reproduction in japanese quail (coturnix coturnix ). | three experiments were designed to study the effects of handling, pairing, and frequency of mating opportunities on reproduction in japanese quail (coturnix coturnix ) when the sexes were caged separately except during the 90 minute mating periods. in experiments 1 and 2, 48 females and 48 males were allocated randomly to one of four treatments: 1) continuously paired, 2) paired daily with the same male, 3) paired daily with a different male, and 4) paired every third day with the same male. in ... | 1992 | 16727087 |
| sodium chloride and water transport in the thin descending limb of henle of the quail. | birds and mammals can produce hyperosmotic urine, but their renal morphology and urine-concentrating mechanisms differ. to elucidate the countercurrent urine concentration mechanism in birds, we examined the structure and transport properties of the descending limb (dl) of henle of mammalian-type nephrons in japanese quail, coturnix coturnix. in the avian renal medulla, a prominent ring of collecting ducts and scattered thick limbs surrounds a core of capillaries and dls. epithelial cells in the ... | 1989 | 2603965 |
| the dose-dependent deposition of cadmium into organs of japanese quail following oral administration. | the accumulation and disposition of cd2+ as cdcl2 administered orally to japanese quail (coturnix coturnix) was investigated. birds received 0.01, 0.10, 1.0, 50, 500, 5000, or 50,000 micrograms cd/kg/day for 4 consecutive days by gastric tube, and were killed 4 days after the final dose. the percentage of the total administered dose recovered in liver + kidneys + duodenum was 0.7% or less in all but the highest dose, for which recovery was approximately 2%. only at the highest dose did the hepat ... | 1988 | 3413792 |
| diluting segment in avian kidney. i. characterization of transepithelial voltages. | renal tubules from the japanese quail, coturnix coturnix, were perfused in vitro to characterize the transepithelial voltage (vt). the thick limb (tl) of the mammalian-type (mt) nephron showed vt positive in the lumen (+9.1 +/- 0.7 mv, n = 35). the vt decreased with increases in hydrostatic perfusion pressure. furosemide (lumen), na cyanide (bath), and ouabain (bath) reversibly reduced vt. removal of cl or na from the perfusate and the bath decreased vt of the tl from +10.3 +/- 3.0 to -0.3 +/- 0 ... | 1986 | 3953845 |
| [hepatic and duodenal biotransformation in japanese quail (coturnix coturnix): activities of 7-ethoxycoumarin o-deethylase and coumarin 7-hydroxylase]. | in vitro cytochrome p-450-dependent monooxygenase activity was studied in hepatic and duodenal microsomes from the japanese quail (coturnix coturnix) with two substrates, 7-ethoxycoumarin and coumarin. the rate of formation of 7-hydroxycoumarin--as the main metabolic product--was followed by fluorometry. 7-ethoxycoumarin o-de-ethylase activity (7-ecod) was shown in liver and duodenum, but coumarin 7-hydroxylase (cou 7-oh) was found only in liver. the requirement for some cofactors (nadph), the i ... | 1986 | 3490823 |
| immunohistochemical localization of corticotropin-releasing factor (crf)-containing neurons in the hypothalamus of the japanese quail, coturnix coturnix. | immunohistochemical localization of corticotropin-releasing factor (crf)-like immunoreactivity in the brain of the japanese quail was studied by means of the peroxidase anti-peroxidase (pap) method. crf-immunopositive perikarya of parvocellular neurons were observed mainly in the nucleus praeopticus medialis and nucleus paraventricularis. additional perikarya were also detected in the nucleus hypothalamicus posterior medialis in the hypothalamus and in the non-hypothalamic nucleus accumbens, nuc ... | 1985 | 3884159 |
| effect of pyrethroid insecticides and n-(3,5-dichlorophenyl) dicarboximide fungicides on microsomal drug-metabolizing enzymes in the japanese quail (coturnix coturnix). | | 1983 | 6640144 |
| immunohistochemical localization of vasoactive intestinal polypeptide (vip)-containing neurons in the hypothalamus of the japanese quail, coturnix coturnix. | the localization of vasoactive intestinal polypeptide (vip) in the hypothalamus of the quail has been studied by means of light- and electron-microscopic immunohistochemistry. numerous vip-immunoreactive perikarya are distributed in the caudal portion of the nucleus infundibularis (n. tuberis) and nucleus mamillaris lateralis, and sparse in the preoptic area, nucleus supraopticus and nucleus paraventricularis. dense localization of immunoreactive-vip fibers is observed in the external layer of t ... | 1982 | 7127414 |
| cytological differentiation of the interrenal tissue of the japanese quail, coturnix coturnix. | as reported for several other avian species there are clearly distinguishable subcapsular (scz) and inner (iz) zones of interrenal tissue in the japanese quail. the scz contains large columnar cells (type i) with rounded nuclei, polymorphic mitochondria with shelf-like cristae, and relatively small numbers of lipid droplets. the iz contains two and possibly three types of cells. type ii consists of large columnar cells with moderately dense cytoplasm containing large numbers of lipid droplets an ... | 1980 | 6249499 |
| ultrastructure of the subfornical organ of the japanese quail, coturnix coturnix. | | 1978 | 639095 |
| heart rate response to light in the embryo of the japanese quail (coturnix coturnix). | the effects of exposure to light were investigated during and shortly after the period of light stimulation. a particular objective was to evaluated any responses to the type of illumination conditions generally used for observation of avian embryos. twenty 16-day japanese quail embryos were illuminated for 15 minutes each during a total recording period of 55 minutes. heart rate, respiration rate and an approximate measure of activity were recorded. mean heart rate was found to be higher during ... | 1977 | 908914 |
| contribution of gular flutter to evaporative cooling in japanese quail. | oxygen consumption, body temperature (tb), and evaporative water loss (mwe) were determined in intact japanese quail (coturnix coturnix), and in quail in which the hyoid musculature responsible for gular flutter had been surgically transected several days prior to study. abolishing gular flutter reduced total mwe by an average of 20% at air temperatures (ta) above 40 degrees c. treated birds developed a significantly greater degree of hyperthermia during acute heat stress than the controls and, ... | 1976 | 931873 |
| the life cycle of eimeria bateri (protozoa, eimeriidae) in the japanese quail coturnix coturnix japonicum. | | 1971 | 5552705 |
| comparison of growth curve parameters of organs and body components in meat- (coturnix coturnix coturnix) and laying-type (coturnix coturnix japonica) quail show interactions between gender and genotype. | 1. the objective of this study was to estimate growth parameters of carcass components (wing, thighs and drumsticks, back and breast) and organs (heart, liver, gizzard and gut) in males and females of one meat-type quail strain (coturnix coturnix coturnix) and two laying strains (coturnix coturnix japonica) designated either yellow or red. 2. a total of 1350 quail from 1 to 42 d old were distributed in a completely randomised design, with 5 replicates of each strain. the carcass component weight ... | 2015 | 25490970 |
| [comparison of the distribution and caliber of the slow and rapid fibers of pectoral muscle in coturnix coturnix coturnix l. and in the semi-domestic subspecies coturnix coturnix japonica]. | | 1961 | 13871578 |
| evaluation of some heavy metals residues in batteries and deep litter rearing systems in japanese quail meat and offal in egypt. | the main objectives of this study were for comparing the effect of batteries and deep litter rearing systems of domesticated japanese quail, coturnix coturnix japonica, on the concentration levels of cadmium, copper, lead, and zinc from the quail meat and offal in ismailia, egypt. | 2017 | 28344413 |
| effects of pentachlorophenol on the quail (coturnix japonica) liver detoxification pathway. | pentachlorophenol (pcp), an extensively used pesticide and biocide, is of critical environmental concern due to its toxicity and recalcitrance to degradation. in this study, the effect of pcp on induction of transcription factors, cytochrome p450 (cyp450) genes, and the antioxidative enzyme system were investigated in the quail liver. a total of 60 (4- to 6-week-old) male quails (coturnix japonica) were administered 0, 0.05, 0.5, and 5 mg/kg/d pcp orally for 42 d. following exposure, both absolu ... | 2017 | 28284116 |
| bioactivities of coturnix japonica (quail) egg yolk and albumen against physiological stress. | cold and immobilization stressors can generate oxidative stress as well as skeletal muscle fatigue. free radicals cause oxidative degradation of lipids, proteins, nucleic acids, and carbohydrates molecules thereby compromising cell integrity and function. coturnix japonica (quail) egg had been described as being very functional biochemically, due to the essential biomolecules it contains in very regulated quantity. this study was designed to evaluate the in vitro antioxidant activity of extracts ... | 2017 | 28265368 |
| effects of 4-nonylphenol in drinking water on the reproductive capacity of japanese quails (coturnix japonica). | 4-nonylphenol (4-np), a major degradation product of nonylphenol ethoxylates (npeos), is widespread in environment. in this study, the effects of long-term 4-np exposure in drinking water on japanese quails (coturnix japonica) were investigated. a total of 45 quails were evenly divided into 15 groups and administrated with various doses (0.1 μg l(-1), 1.0 μg l(-1), 10 μg l(-1) and 100 μg l(-1), which reflected the environmental concentrations of 4-np) of 4-np in drinking water. the results showe ... | 2017 | 28222376 |
| appraisal and standardization of curvilinear velocity (vcl) cut-off values for casa analysis of japanese quail (coturnix japonica) sperm. | one of the basic steps in objective analysis of sperm motility is the subdivision of a motile sperm population into slow, medium and rapid categories based on their velocity. however, for casa analysis of quail sperm, the velocity values for categorization of slow, medium and rapid sperm have not yet been standardized. to identify the cut-off values of "velocity curvilinear" (vcl) for quail sperm categorization, we captured and analysed 22,300 tracks of quail sperm using sca(®) -casa. the median ... | 2017 | 28191666 |
| restricted nutrition-induced low birth weight, low number of nephrons and glomerular mesangium injury in japanese quail. | insufficient nutrition during the perinatal period causes structural alterations in humans and experimental animals, leading to increased vulnerability to diseases in later life. japanese quail, coturnix japonica, in which partial (8-10%) egg white was withdrawn (eww) from eggs before incubation had lower birth weights than controls (cts). eww birds also had reduced hatching rates, smaller glomeruli and lower embryo weight. in eww embryos, the surface condensate area containing mesenchymal cells ... | 2017 | 28162133 |
| effects on circulating steroid hormones and gene expression along the hypothalamus-pituitary-gonadal axis in adult japanese quail exposed to 17β-trenbolone across multiple generations. | we investigated the effects of the androgenic growth promoter 17ß-trenbolone (17βtb) on adult japanese quail (coturnix japonica) exposed across three generations. the f0 generation was exposed after sexual maturity to 0, 1, 5, 10, 20, and 40 ppm through feed. the f1 generation was exposed in ovo by maternal transfer and through feed at the same doses as their parents. the f2 generation was exposed in ovo only. levels of plasma sex steroids, gonadal cytochrome p450 aromatase (cyp19a1) mrna and se ... | 2017 | 28108667 |
| behavioral response and gene expression changes in fipronil-administered male japanese quail (coturnix japonica). | fipronil is an important member of the phenylpyrazole group of insecticides and is widely used for various crops and vegetables to control insects, thereby exposing birds, animals, and humans to fipronil. currently, there is limited information on the effects of fipronil exposure in japanese quail. therefore, our aim was to assess the reproductive toxicological effects of fipronil in the japanese quail in a 15-day gavage study and then its recovery over a period of 60 days. fipronil-administrati ... | 2017 | 28108161 |
| genetic divergence in domestic japanese quail inferred from mitochondrial dna d-loop and microsatellite markers. | to assess the genetic diversity of domestic japanese quail (coturnix japonica) populations, and their genetic relationships, we examined mitochondrial dna (mtdna) d-loop sequences and microsatellite markers for 19 japanese quail populations. the populations included nine laboratory lines established in japan (lwc, quv, rwn, we, awe, amrp, rb-tkp, nies-l, and w), six meat-type quail lines reimported from western countries (jd, jw, estonia, nies-br, nies-fr, and nies-hn), one commercial population ... | 2017 | 28107483 |
| characterization of the cathelicidin cluster in the japanese quail (coturnix japonica). | the japanese quail has several advantages as a low-fat meat bird with high immunity against diseases. cathelicidins (caths) are antimicrobial peptides that play an important role in innate immunity. the aim of this study was to characterize the cath cluster in the japanese quail (coturnix japonica). the japanese quail cath (cjcath) cluster, contains four cath genes, as in the chicken. the coding sequences of cjcaths exhibited >85.3% identity to chicken caths. the predicted amino acid sequences o ... | 2017 | 28084024 |
| medial preoptic regulation of the ventral tegmental area related to the control of sociosexual behaviors. | during sociosexual encounters, different brain mechanisms interact to orchestrate information about the salience of external stimuli along with the current physiological and environmental conditions in order to process these in an optimal manner. one candidate neural system involves the potential interplay between the medial preoptic nucleus (pom) and mesolimbic reward circuitry. we present here evidence indicating that projections originating from the pom play a modulatory role on the mesolimbi ... | 2017 | 28083561 |
| a trade-off between reproductive investment and maternal cerebellum size in a precocial bird. | natural selection favours increased investment in reproduction, yet considerable variation in parental investment is observed in natural populations. life-history theory predicts that this variation is maintained by a trade-off between the benefits of increased reproductive investment and its associated costs for the parents. the nature of these costs of reproduction, however, remains poorly understood. the brain is an energetically highly expensive organ and increased reproductive investment ma ... | 2016 | 28003519 |
| disentangling genetic and prenatal maternal effects on offspring size and survival. | organizational processes during prenatal development can have long-term effects on an individual's phenotype. because these early developmental stages are sensitive to environmental influences, mothers are in a unique position to alter their offspring's phenotype by differentially allocating resources to their developing young. however, such prenatal maternal effects are difficult to disentangle from other forms of parental care, additive genetic effects, and/or other forms of maternal inheritan ... | 2016 | 27860503 |
| a simple pcr method for sexing japanese quail coturnix japonica at hatching. | 1. the quail is a potentially important avian model for molecular studies; a major drawback is the inability to sex visually before 3 weeks of age. molecular sexing is therefore an absolute requirement when animals are sampled before that age. 2. a low-cost method using common laboratory equipment based on allele-specific multiplex-polymerase chain reaction was developed to undertake reliable molecular identification of the sex of coturnix japonica directly at hatching. 3. this simple method wor ... | 2017 | 27845564 |
| isolation, characterization, and in vitro culturing of spermatogonial stem cells in japanese quail (coturnix japonica). | we reported previously testis-mediated germline chimera production and characterization of germline stem cell-like cells from chicken testes. the present study aimed to establish an in vitro system for culture of quail spermatogonial stem cells (sscs) for practical applications in germline preservation and transgenesis. testicular cells (tcs) from juvenile (4 weeks old) or adult (8 weeks old) quail testis were isolated using sequential enzymatic digestion. the percentages of viability of isolate ... | 2017 | 27702397 |
| the effects of high-fat diets composed of different animal and vegetable fat sources on the health status and tissue lipid profiles of male, japanese quail (coturnix coturnix japonica). | the current study aimed to investigate the impact of high-fat diets composed of different animal and vegetable fat sources on serum metabolic health markers in japanese quail, as well as the overall lipid content and fatty acid profiles of the edible bird tissues following significantly increased dietary lipid supplementation. | 2016 | 27764914 |
| a survey of japanese quail (coturnix coturnix japonica) farming in selected areas of bangladesh. | to investigate the status, problems and prospects of japanese quail (coturnix coturnix japonica) farming in selected areas of bangladesh. | 2016 | 27733793 |
| body weight, egg production, and egg quality traits of gray, brown, and white varieties of japanese quail (coturnix coturnix japonica) in coastal climatic condition of odisha. | the present study was conducted to evaluate the performance of gray, brown, and white varieties of japanese quail (coturnix coturnix japonica) with respect to body weight, egg production, and egg quality traits in the coastal climatic condition of odisha. | 2016 | 27651670 |
| matrilineal inheritance of a key mediator of prenatal maternal effects. | sex-linkage is predicted to evolve in response to sex-specific or sexually antagonistic selection. in line with this prediction, most sex-linked genes are associated with reproduction in the respective sex. in addition to traits directly involved in fertility and fecundity, mediators of maternal effects may be predisposed to evolve sex-linkage, because they indirectly affect female fitness through their effect on offspring phenotype. here, we test for sex-linked inheritance of a key mediator of ... | 2016 | 27629040 |
| interspecific hybrids of dwarf hamsters and phasianidae birds as animal models for studying the genetic and developmental basis of hybrid incompatibility. | hybrid incompatibility is important in speciation as it prevents gene flow between closely related populations. reduced fitness from hybrid incompatibility may also reinforce prezygotic reproductive isolation between sympatric populations. however, the genetic and developmental basis of hybrid incompatibility in higher vertebrates remains poorly understood. mammals and birds, both amniotes, have similar developmental processes, but marked differences in development such as the xy/zw sex determin ... | 2016 | 27628130 |
| high yolk testosterone transfer is associated with an increased female metabolic rate. | yolk androgens of maternal origin are important mediators of prenatal maternal effects. although in many species short-term benefits of exposure to high yolk androgen concentrations for the offspring have been observed, females differ substantially in the amount of androgens they transfer to their eggs. it suggests that costs for the offspring or the mother constrain the evolution of maternal hormone transfer. however, to date, the nature of these costs remains poorly understood. unlike most pre ... | 2016 | 27617364 |
| expressional changes of amh signaling system in the quail testis induced by photoperiod. | gonadal sex differentiation proceeds by the interplay of various genes including the transcription factors and secretory factors in a complex network. the sex-differentiating genes are expressed not only during early sex differentiation but also throughout the gonadal development and even in the adult gonads. in addition, the evidence that they actually function in the adult gonads have been accumulated from the studies using the conditional knockout mice. however, many previous studies were foc ... | 2016 | 27581082 |
| artificial selection reveals the energetic expense of producing larger eggs. | the amount of resources provided by the mother before birth has important and long-lasting effects on offspring fitness. despite this, there is a large amount of variation in maternal investment seen in natural populations. life-history theory predicts that this variation is maintained through a trade-off between the benefits of high maternal investment for the offspring and the costs of high investment for the mother. however, the proximate mechanisms underlying these costs of reproduction are ... | 2016 | 27559356 |
| semen characteristics and biochemical composition of cloacal foam of male japanese quails (coturnix coturnix japonica) fed diet incorporated with selenium. | an attempt was made to investigate the effect of dietary selenium (se) on physical and cloacal gland size, foam production, biochemical composition of foam and semen biochemical characteristics of male japanese quail (coturnix coturnix japonica). two hundred twenty-five (225)-day-old male japanese quail were randomly distributed to three dietary treatment groups for a period of 20 weeks. each treatment comprised of three replicates, each containing 25 chicks. three experimental diets were supple ... | 2017 | 27486071 |
| effect of long-term selection for egg production on eggshell quality of japanese quail (coturnix japonica). | an experiment was conducted to evaluate egg quality and ultrastuctural measurements of eggshell using a scanning electron microscope (sem) in 2 lines (selected and control) of japanese quail. a selection program was applied over 22 consecutive generations for higher egg production and lower broken egg percentage. the results revealed that the females of the selected line produced significantly (p < 0.01) higher egg mass compared to that of the control line. also, the selection procedure signific ... | 2016 | 27389061 |
| black soldier fly as dietary protein source for broiler quails: apparent digestibility, excreta microbial load, feed choice, performance, carcass and meat traits. | in order to expand with validated scientific data the limited knowledge regarding the potential application of insects as innovative feed ingredients for poultry, the present study tested a partial substitution of soya bean meal and soya bean oil with defatted black soldier fly (hermetia illucens) larvae meal (h) in the diet for growing broiler quails (coturnix coturnix japonica) on growth performance, mortality, nutrients apparent digestibility, microbiological composition of excreta, feed choi ... | 2016 | 27339654 |
| plasma and tissue disposition of moxifloxacin in japanese quail ( coturnix japonica ). | plasma disposition and depletion of moxifloxacin were investigated in japanese quail ( coturnix japonica ) after single intravenous, intramuscular, and oral administration of 5 mg/kg and after intramuscular and oral administration of 5 mg/kg q24h for 5 consecutive days, respectively. drug concentrations in plasma and tissues were measured by high-performance liquid chromatography with fluorescence detection. after intravenous injection, plasma drug concentration-time curves were best described b ... | 2016 | 27315376 |
| characterization and expression of non-polymorphic liver expressed antimicrobial peptide 2: leap-2 in the japanese quail, coturnix japonica. | liver-expressed antimicrobial peptide 2 (leap-2) is a cationic peptide that plays an important role in innate immunity for host defense. the aim of this study was to characterize the leap-2 gene in the japanese quail (coturnix japonica). japanese quail leap-2 (cjleap-2) was identified from the japanese quail draft genome database by a local blast analysis using chicken leap-2 (ggleap-2). the exon-intron structure of cjleap-2, analyzed from three quails, is composed of three exons, as is the chic ... | 2016 | 27313148 |
| effect of sex on histological and histochemical structures of different parts of the kidney in japanese quail. | the aim of the present study was to investigate the effect of gender on the histological and histochemical structures of different anatomical regions of the kidney in japanese quail (coturnix japonica). tissue samples from cranial, middle and caudal divisions of each kidney were obtained from 20 male and 20 female adult, healthy japanese quail. the sections stained with hematoxylin & eosin ( h & e: ), masson's trichrome, verhoeff's, alcian blue (ph 2.5), periodic acid-schiff, and gomori's method ... | 2016 | 27274085 |
| neurotrophins and specific receptors in the oviduct tracts of japanese quail (coturnix coturnix japonica). | neurotrophins (ngf, bdnf and nt-3) and their specific receptors (trka, trkb and trkc) were studied in the oviduct of egg laying quails. neurotrophins (nts) are mainly involved in the development and maintenance of neuronal populations in the central and peripheral nervous system, but also in reproductive system. in this survey, we first studied the morphological organization of the quail oviduct, distinguished in infundibulum, magnum, isthmus, uterus and vagina, and then we analyzed the expressi ... | 2017 | 27235870 |
| use of transcutaneous ultrasonography to characterize ovarian status, size distribution, and hierarchical status of follicles in japanese quail (coturnix coturnix japonica). | the present study was undertaken to evaluate the ovarian status of matured breeding female japanese quail by means of b mode portable ultrasound scanning. active ovaries in various stages of hierarchical development and different morphological structure were observed. the large yellow follicles appeared as a cluster of dark circles with various intensity of hyperechoic concentric ring. sonographically, these follicles were classified into f1, f2, and f3 measuring 16.20 ± 0.06 mm, 12.48 ± 0.09 mm ... | 2016 | 27233352 |
| apoptosis-mediated testicular alteration in japanese quail (coturnix coturnix japonica) in response to temporal phase relation of serotonergic and dopaminergic oscillations. | reproductive performance of many avian species, including japanese quail, is reported to be modulated by specific temporal phase relation of serotonergic and dopaminergic oscillations. accordingly, it has been shown that the serotonin precursor 5-htp and the dopamine precursor l-dopa given 8 h apart induce gonadal suppression and given 12 h apart lead to gonadal stimulation, while other temporal relationships were found to be ineffective. in the present study, we investigated the effects of 8- a ... | 2016 | 27207953 |
| a low dose of an organophosphate insecticide causes dysbiosis and sex-dependent responses in the intestinal microbiota of the japanese quail (coturnix japonica). | organophosphate insecticides have been directly or indirectly implicated in avian populations declining worldwide. birds in agricultural environments are commonly exposed to these insecticides, mainly through ingestion of invertebrates after insecticide application. despite insecticide exposure in birds occurring mostly by ingestion, the impact of organophosphates on the avian digestive system has been poorly researched. in this work we used the japanese quail (coturnix japonica) as an avian mod ... | 2016 | 27168998 |
| neurotrophins and specific receptors in the oviduct tracts of japanese quail (coturnix coturnix japonica). | neurotrophins (ngf, bdnf and nt-3) and their specific receptors (trka, trkb and trkc) were studied in the oviduct of egg laying quails. neurotrophins (nts) are mainly involved in the development and maintenance of neuronal populations in the central and peripheral nervous system, but also in reproductive system. in this survey, we first studied the morphological organization of the quail oviduct, distinguished in infundibulum, magnum, isthmus, uterus and vagina, and then we analyzed the expressi ... | 2016 | 27167968 |
| an evaluation of inorganic toxicity reference values for use in assessing hazards to american robins (turdus migratorius). | when performing screening-level and baseline risk assessments, assessors usually compare estimated exposures of wildlife receptor species with toxicity reference values (trvs). we modeled the exposure of american robins (turdus migratorius) to 10 elements (as, cd, cr, cu, hg, mn, pb, se, zn, and v) in spring and early summer, a time when earthworms are the preferred prey. we calculated soil benchmarks associated with possible toxic effects to these robins from 6 sets of published trvs. several o ... | 2017 | 27155981 |
| long-term effect of yolk carotenoid levels on testis size in a precocial bird. | conditions experienced during prenatal development can have long-lasting organizational effects on offspring. maternal carotenoids deposited in the eggs of birds and other oviparous species play an important role during fast embryonic growth and chick development through their antioxidant properties. however, the long-term consequences of variation in maternal carotenoid transfer for the offspring have seldom been considered. since plasma carotenoid levels at adulthood are known to influence tes ... | 2016 | 27122006 |
| genistein causes germ cell reduction in the genital ridges of japanese quail coturnix japonica embryo. | genistein (gen), an isoflavonoid phytoestrogen, is one of the potent estrogenic compounds derived from plants that can cause disrupting effects on sex organ development in non-mammalian and mammalian species. the present study revealed effect of genistein on germ cell number in the genital ridges during gonadogenesis. genistein (16 and 24 μg/g egg) was injected into the egg yolk prior to incubation. effect of genistein on quail-primordial germ cells (pgcs) number was examined by counting the num ... | 2016 | 27096788 |
| another way to win: learning and intrasexual competition in japanese quail (coturnix japonica). | two experiments were designed to test whether learning affects the opportunity to obtain cloacal contact with female sexual partners during male-male contests in japanese quail (coturnix japonica). the aim of experiment 1 was to evaluate the relationship between competitive status and efficiency of access to cloacal contact. six groups of 3 males each were observed for 40 days. observed males established stable dominance relationships in which winner status positively correlated with copulatory ... | 2016 | 27078074 |
| in search of genetic constraints limiting the evolution of egg size: direct and correlated responses to artificial selection on a prenatal maternal effector. | maternal effects are an important force in nature, but the evolutionary dynamics of the traits that cause them are not well understood. egg size is known to be a key mediator of prenatal maternal effects with an established genetic basis. in contrast to theoretical expectations for fitness-related traits, there is a large amount of additive genetic variation in egg size observed in natural populations. one possible mechanism for the maintenance of this variation is through genetic constraints ca ... | 2016 | 26956564 |
| effect of different light sources on reproductive anatomy and physiology of japanese quail (coturnix coturnix japonica). | artificial lights are essential for controlling the reproductive tract development of birds during puberty and therefore influence reproductive quality. the aim of this study was to evaluate the effect of different light sources on reproductive anatomic and physiological characteristics of female japanese quail (coturnix coturnix japonica). a total of 270 birds from one day of age were housed in a masonry shed divided into six rooms with light isolation. each room was equipped with a different t ... | 2016 | 26949140 |
| lipidomic modulation in stressed albino rats is altered by yolk and albumen of quail (coturnix japonica) egg and poultry feed. | cold and immobilization stressors can generate oxidative stress as well as skeletal muscle fatigue. free radicals cause oxidative degradation of lipids, proteins, nucleic acids, and carbohydrates molecules, thereby compromising cell integrity and function. quail egg had been described as being very functional biochemically, due to the essential biomolecules it contains in very regulated quantity. this study was aimed for evaluating the dietary effect of the egg on lipid profile parameters on sel ... | 2016 | 26942009 |
| bioaccessibility tests accurately estimate bioavailability of lead to quail. | hazards of soil-borne lead (pb) to wild birds may be more accurately quantified if the bioavailability of that pb is known. to better understand the bioavailability of pb to birds, the authors measured blood pb concentrations in japanese quail (coturnix japonica) fed diets containing pb-contaminated soils. relative bioavailabilities were expressed by comparison with blood pb concentrations in quail fed a pb acetate reference diet. diets containing soil from 5 pb-contaminated superfund sites had ... | 2016 | 26876015 |
| stimulation of food intake after central administration of gonadotropin-inhibitory hormone is similar in genetically selected low and high body weight lines of chickens. | gonadotropin-inhibitory hormone (gnih), first isolated from the brain of the japanese quail (coturnix japonica), when centrally administered exerts orexigenic effects in birds. however, the precise mechanisms mediating this effect are poorly understood and limited information is available on this effect in models of body weight dysfunction. thus, the purpose of the present study was to investigate appetite-associated effects of gnih in chicks from lines that have been selected for either low or ... | 2016 | 26764213 |
| normal ultrasonographic images of reproductive organs of female japanese quails ( coturnix coturnix japonica): a laboratory animal model. | certain special biological characteristics of japanese quails ( coturnix coturnix japonica) could enable quicker and less expensive laboratory experiments than similar studies using mice or chickens. moreover, due to some physiological similarities with humans, quails have been recognized as an ideal laboratory model for experiments in some fields such as immunology, endocrinology, and reproductive biology. the aim of this study was to acquire normal ultrasonographic images of reproductive organ ... | 2017 | 26763492 |
| the gastrointestinal tract microbiota of the japanese quail, coturnix japonica. | microbiota in the gastrointestinal tract (git) plays an essential role in the health and well-being of the host. with the exception of chickens, this area has been poorly studied within birds. the avian git harbours unique microbial communities. birds require rapid energy bursts to enable energy-intensive flying. the passage time of feed through the avian git is only 2-3.5 h, and thus requires the presence of microbiota that is extremely efficient in energy extraction. this investigation has use ... | 2016 | 26758298 |
| [effects of hypoxia and growth factors on the angiogenic activity of multipotent mesenchymal stromal cells]. | the effects of fetal calf serum (fcs) growth factor concentration and cell growth phase on production of angiogenic mediators by mesenchymal stromal cells (mscs) at different o2 levels (20 and 5%) was studied. for this purpose vascular endothelial growth factor (vegf-a) production was measured in msc-conditioned medium (cm); besides, branching vessels as well as vessel end points (ramification) in the chorioallantoic membrane of japanese quail eggs (coturnix coturnix japonica) were counted follo ... | 2015 | 26738305 |
| comparison of two 4.7-milligram to one 9.4-milligram deslorelin acetate implants on egg production and plasma progesterone concentrations in japanese quail (coturnix coturnix japonica). | reproductive disease in captive avian species is common, and medical management is often chosen over surgical removal of the reproductive tract. in a previous study with japanese quail, a single 4.7-mg deslorelin acetate implant reversibly decreased egg production in 6 out 10 birds for 70 days. the objective of the current study was to evaluate the effects of two 4.7-mg deslorelin acetate implants versus one 9.4-mg implant on egg production and plasma progesterone concentrations in japanese quai ... | 2015 | 26667535 |
| modelling inhibition of avian aromatase by azole pesticides. | the potential effects of pesticides and their metabolites on the endocrine system are of major concern to wildlife and human health. in this context, the azole pesticides have earned special attention due to their cytochrome p450 aromatase inhibition potential. cytochrome p450 aromatase (cyp19) catalyses the conversion of androstenedione and testosterone into oestrone and oestradiol, respectively. thus, aromatase modulates the oestrogenic balance essential not only for females, but also for male ... | 2015 | 26535448 |
| photoinduced changes in subcellular structures of the retinal pigment epithelium from the japanese quail coturnix japonica. | fifteen-week-old sexually mature female japanese quails (coturnix japonica) grown under various lighting conditions were used in the study. it was found that the number of mitochondria and phagosomes was increased by 1.5-fold in the retinal pigment epithelium from birds reared for 95 days under blue light (440-470 nm) vs. reduced blue light component conditions. also, it was found that egg production was increased by 15% in birds reared under blue light compared to other lightning conditions. th ... | 2015 | 26531024 |
| the effects of transportation stress on japanese quail (coturnix coturnix japonica) fed corn-based diet in comparison with wheat-based diet supplemented with xylanase and phytase. | harvesting, handling and transporting quails to the slaughterhouses, other farms and laboratories might covertly reduce their welfare. the aim of this study was to evaluate the effects of two major sources of energy in poultry nutrition on reducing transportation stress in japanese quail (coturnix coturnix japonica). male quails (n = 60) were divided into two groups. the first group was fed corn-based diet, and the second was fed wheat-based diet supplemented with xylanase and phytase. at the en ... | 2016 | 26459218 |
| toxicity and cytochrome p450 1a mrna induction by 6-formylindolo[3,2-b]carbazole (ficz) in chicken and japanese quail embryos. | the tryptophan derivative formylindolo[3,2-b]carbazole (ficz) binds with high ligand affinity to the aryl hydrocarbon receptor (ahr) and is readily degraded by ahr-regulated cytochrome p450 family 1 (cyp1) enzymes. whether in vivo exposure to ficz can result in toxic effects has not been examined and the main objective of this study was to determine if ficz is embryotoxic in birds. we examined toxicity and cyp1 mrna induction of ficz in embryos from chicken (gallus domesticus) and japanese quail ... | 2016 | 26456929 |
| relative sensitivities among avian species to individual and mixtures of aryl hydrocarbon receptor-active compounds. | dioxins and dioxin-like compounds (dlcs) are potent toxicants to most vertebrates. sensitivities to dlcs vary among species. in the present study, the sensitivities of avian species (chicken [gallus gallus], ring-necked pheasant [phasianus colchicus], and japanese quail [coturnix japonica]) to some polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans (pcdd/fs) were determined by using species-specific, in vitro, transactivation assays based on a luciferase reporter gene under cont ... | 2016 | 26442838 |
| expression of prostaglandin-synthesizing enzymes (cyclooxygenase 1, cyclooxygenase 2) in the ovary of the quail (coturnix japonica). | cyclooxygenase is known to be the ratelimiting enzyme in the production of prostaglandins. so far, in different bird species there have been found two isoforms of cyclooxygenases (cox), cyclooxygenase 1 (cox-1) and cyclooxygenase 2 (cox-2). these isoforms along with prostaglandins are regarded to possess a determining influence on the success in female reproduction. only in a few bird species the expression sites of cyclooxygenases have been investigated. in this study we report on the expressio ... | 2015 | 26441201 |
| comprehensive identification of sexual dimorphism-associated differentially expressed genes in two-way factorial designed rna-seq data on japanese quail (coturnix coturnix japonica). | japanese quail (coturnix coturnix japonica) reach sexual maturity earlier, breed rapidly and successfully, and cost less and require less space than other birds raised commercially. given the value of this species for food production and experimental use, more studies are necessary to determine chromosomal regions and genes associated with gender and breed-differentiation. this study employed trinity and edger for transcriptome analysis of next-generation rna-seq data, which included 4 tissues o ... | 2015 | 26418419 |
| subchronic exposure to chlorpyrifos affects energy expenditure and detoxification capacity in juvenile japanese quails. | effects of pesticides on non-target organisms have been studied in several taxa at different levels of biological organization, from enzymatic to behavioral responses. although the physiological responses may be associated with higher energy costs, little is known about metabolic costs of pesticide detoxification in birds. to fill this gap, we exposed orally (diet) 15-d old coturnix coturnix japonica individuals to sublethal doses of chlorpyrifos (10 and 20 mg active ingredient/kg dry food) for ... | 2016 | 26414738 |
| discovery and functional characterization of leptin and its receptors in japanese quail (coturnix japonica). | leptin is an important endocrine regulation factor of food intake and energy homeostasis in mammals; however, the existence of a poultry leptin gene (lep) is still debated. here, for the first time, we report the cloning of a partial exon 3 sequence of lep (qlep) and four different leptin receptor splicing variants, including a long receptor (qleprl) and three soluble receptors (qlepr-a, qlepr-b and qlepr-c) in japanese quail (coturnix japonica). the qlep gene had high gc content (64%), which is ... | 2016 | 26342967 |
| basic characterization of avian β-defensin genes in the japanese quail, coturnix japonica. | in this study, we identified a cluster of 14 avian β-defensins (avbd; approximately 66 kbp) in the japanese quail, coturnix japonica. except for avbd12 (cjavbd12) and -13, the cjavbds coding sequences exhibited greater than 78.0% similarity to the respective orthologous chicken avbd genes (ggavbd). the putative amino acid sequence encoded by each cjavbd contained six cysteine residues and the gxc (x1-2) motif considered essential for the β-defensin family. each cjavbds also formed a sub-group wi ... | 2016 | 26338292 |
| nesfatin-1: localization and expression in avian gonads and its modulation by temporal phase relation of neural oscillations in female japanese quail, coturnix coturnix japonica. | in a search for new appetite-controlling signals, the peptide nesfatin-1, expressed in the brain and peripheral tissues of rodents and humans has been reported to regulate feeding by reducing food intake. recently it has also been reported that nesfatin-1 might be involved in regulating the reproductive axis in fishes and mammals, but its expression and physiological role if any, is not yet known in birds. in the present study, localization and expression of nesfatin-1 was observed in the testis ... | 2015 | 26319133 |
| hit or miss: fertilization outcomes of natural inseminations by japanese quail. | variation in fertilization success underlies sexual selection, yet mating does not guarantee fertilization. the relationship between natural inseminations and fertilization success is essential for understanding sexual selection, yet that relationship and its underlying mechanisms are poorly understood in sperm-storing vertebrates such as birds. here the relationship is analyzed in mating trials using japanese quail (coturnix japonica), which show striking variation in the fertilizing success of ... | 2015 | 26222780 |
| effects of experimentally increased in ovo lysozyme on egg hatchability, chicks complement activity, and phenotype in a precocial bird. | in birds, spectrum of egg white proteins deposited into the egg during its formation are thought to be essential maternal effects. particularly, egg white lysozyme (lsm), exhibiting great between and within species variability, is considered to be essential for developing avian embryos due to its physiological, antimicrobial, and innate immune defense functions. however, there have been few studies investigating effects of lsm on early post-hatching phenotype, despite its broad physiological and ... | 2015 | 26205223 |
| immunohistochemical localization of epidermal growth factor system in the lung of the japanese quail (coturnix coturnix japonica) during the post-hatching period. | the purpose of this study is to determine the possible changes in the localization of the four epidermal growth factor receptors and three ligands in quail lungs from the first day of hatching until the 125th after hatching using immunohistochemical methods. immunohistochemical results demonstrated that four egfrs and their ligands are chiefly located in the cytoplasm of cells. additionally, erbb4, areg, and nrg1 are localized to the nucleus and nucleolus, but egf is present in the nucleolus. er ... | 2015 | 26179370 |
| egg drop syndrome-76 (eds-76) in japanese quails (coturnix coturnix japonica): an experimental study revealing pathology, effect on egg production/quality and immune responses. | egg drop syndrome-76 (eds-76) is a recognized disease of chickens and japanese quails, which is of high economic importance due to its drastic negative effects on egg production in laying birds. the aim of the present study was to better understand the eds-76 viral disease process in japanese quails (coturnix coturnix japonica), since very limited studies have been conducted in this species of birds. for this purpose, an experimental study was conducted with infection of eds-76 virus in laying j ... | 2014 | 26035955 |