Publications
| Title | Abstract | Year Filter | PMID(sorted ascending) Filter |
|---|
| karyotypic evolution in the galliformes: an examination of the process of karyotypic evolution by comparison of the molecular cytogenetic findings with the molecular phylogeny. | to define the process of karyotypic evolution in the galliformes on a molecular basis, we conducted genome-wide comparative chromosome painting for eight species, i.e. silver pheasant (lophura nycthemera), lady amherst's pheasant (chrysolophus amherstiae), ring-necked pheasant (phasianus colchicus), turkey (meleagris gallopavo), western capercaillie (tetrao urogallus), chinese bamboo-partridge (bambusicola thoracica) and common peafowl (pavo cristatus) of the phasianidae, and plain chachalaca (o ... | 2004 | 15218250 |
| threonine metabolism in japanese quail liver. | in general, threonine is metabolized by reaction catalyzed by threonine-3-dehydrogenase (tdh), threonine dehydratase (th) or threonine aldolase (ta). the activities of these three enzymes were compared in the liver of japanese quails and rats. the animals were fed a standard or threonine rich-diet, or fasted for 3 days. the specific activity of tdh in the liver from quail fed a standard diet was 11 times higher than that in the liver from rats fed a standard diet. the tdh activities in the liver ... | 2004 | 15221503 |
| divergent selection for shape of growth curve in japanese quail. 2. embryonic development and growth. | 1. embryonic growth and development were analysed using meat type lines of japanese quail, hg and lg, divergently selected for shape of the growth curve. a total of 1020 embryos of generations 9, 10 or 13 were used for analysis. 2. considerable inter-line differences were observed in the rate of embryonic development. when compared to hg, lg embryos appeared to be developmentally accelerated during the first 42 h of incubation (larger blastoderm diameter, more somites and higher frequency of mor ... | 2004 | 15222413 |
| gonadotropin-inhibitory hormone in gambel's white-crowned sparrow (zonotrichia leucophrys gambelii): cdna identification, transcript localization and functional effects in laboratory and field experiments. | the neuropeptide control of gonadotropin secretion is primarily through the stimulatory action of the hypothalamic decapeptide, gnrh. we recently identified a novel hypothalamic dodecapeptide with a c-terminal leupro-leu-arg-phe-nh2 sequence in the domestic bird, japanese quail (coturnix japonica). this novel peptide inhibited gonadotropin release in vitro from the quail anterior pituitary; thus it was named gonadotropin-inhibitory hormone (gnih). gnih may be an important factor regulating repro ... | 2004 | 15225129 |
| retinal target cells of the centrifugal projection from the isthmo-optic nucleus. | although the avian retina has long been known to receive projection from a midbrain nucleus, the isthmo-optic nucleus (ion), the output of its target cells has remained obscure. we labeled the isthmo-optic (io) terminals in the japanese quail retina, by using anterograde transport of fluorescent tracer injected into the ion, and then labeled target cells for these terminals by means of intracellular tracer injection under direct microscopic observation. somata of the io target cells (iotcs) lie ... | 2004 | 15248195 |
| effects of vinclozolin on spermatogenesis and reproductive success in the japanese quail (coturnix coturnix japonica). | in a one-generation reproduction study, the major agricultural fungicide vinclozolin was administered to adult japanese quail for a period of 6 weeks at dietary levels of 125 and 500 ppm. fertility and reproductive performance were not affected up to the highest concentration, although the examination of additional endpoints in the drakes (spermatid count, histology of the testis) provided some evidence of an inhibition of spermatogenesis at both dietary concentrations. likewise, there were no i ... | 2004 | 15253051 |
| mhc class iib gene sequences and expression in quails (coturnix japonica) selected for high and low antibody responses. | two quail lines, h and l, which were developed for high (h) and low (l) antibody production against inactivated newcastle disease virus antigen, were used to examine differences in the organization, structure and expression of the quail mhc class iib genes. four coja class iib genes in the h line and ten coja class iib genes in the l line were identified by gene amplification using standard and long-range pcrs and sequencing of the amplified products. rflp analysis, sequencing and gene mapping r ... | 2004 | 15258705 |
| effect of alfalfa meal in diets of laying quails on performance, egg quality and some serum parameters. | this study was conducted to investigate the effects of increasing levels of alfalfa meal in the diet of laying quails on egg production, feed consumption, feed efficiency, egg quality, egg yolk cholesterol and selected serum parameters. in this study, 192, 10-week old quails (coturnix coturnix japonica) were evenly distributed to four groups with four replicates of 12 quails each. the control group was fed a basal diet containing 0% alfalfa meal and the remaining groups received 3, 6 or 9% alfal ... | 2004 | 15264674 |
| effects of central administration of naloxone during the extinction of appetitive sexual responses. | several studies indicate that opioids are involved in the control of consummatory sexual behavior in male japanese quail. naloxone has been reported to increase copulatory responses. in the current study, the effect of naloxone on appetitive sexual behaviors was assessed during extinction test trials. naloxone was found to substantially reduce appetitive responding, suggesting that opioids differentially affect anticipatory and contact components of sexual behavior. | 2004 | 15265655 |
| effect of onion (allium cepa linn.) and garlic (allium sativum linn.) on plasma triglyceride content in japanese quail (coturnix coturnix japonicum). | dietary onion and garlic caused an increase in the level of plasma triglyceride which could be due to insulin like activity of dietary alliums and other factors that promote lipogenesisi in growing stages. changes in the plasma triglyceride level in the control group due to change in age and sex were also noted. the triglyceride level was more in female birds when compared to males of similar age group. the plasma trigelyceride level increased with age in both sex except for the level being simi ... | 2003 | 15267143 |
| effect of lead and chromium on reproductive success of japanese quail. | an experimental model based on application of japanese quail (coturnix coturnix japonica) lines with high (h) and low (l) concentrations of plasma lactate was designed in order to investigate the effects of lead and chromium on embryonic development and reproductive success of experimental groups representing different genotypes. during the first stage of the trial, mature males from quail lines h and l (marked as generation t) were fed subchronically for 12 weeks with lead as pb(no(3))(2) and c ... | 2004 | 15269915 |
| dose-dependent cocaine place conditioning and d1 dopamine antagonist effects in male japanese quail. | the dopamine d1 receptor subtype has been implicated in drug reward processes in mammals. two experiments investigated whether dose-dependent differences in cocaine conditioned place preference (cpp) would be obtained in an avian species and whether these cocaine effects were mediated by the dopamine d1 antagonist r(+/-)-sch23390. in experiment 1, male birds were given intraperitoneal injections of 1, 3, 10, or 30 mg/kg of cocaine hydrochloride, paired with a chamber that contained distinct visu ... | 2004 | 15276793 |
| expression of hypothalamic arginine vasotocin gene in response to water deprivation and sex steroid administration in female japanese quail. | arginine vasotocin (avt) is a neurohypophyseal hormone involved in reproductive function and control of osmoregulation in birds. in view of the dual function of avt, the present experiment was designed to observe the effect of water deprivation (wd) and sex steroid [estradiol benzoate (eb) and testosterone propionate (tp)] treatment independently, as well as simultaneously, on the profile/activity of the hypothalamic avt system. wd resulted in a significant increase in plasma osmolality, sodium ... | 2004 | 15277557 |
| pasteurellosis in japanese quail (coturnix coturnix japonica) caused by pasteurella multocida multocida a:4. | 2004 | 15311804 | |
| possible involvement of a sperm-associated body in the process of fertilization in quail. | the present paper describes a novel structure, termed the sperm-associated body, which is found both in the lumen at the oviductal infundibulum and in the vitelline membrane of the ovum in the quail coturnix japonica. the fully developed sperm-associated body, which is about 100 microm long, consisted of two parts; a core of concentric-circular appearance and a cortex of needle-like projections. the outer surface of the body was coated with caco3. the body was always accompanied by spermatozoa. ... | 2004 | 15333998 |
| age-related and steroid induced changes in the histones of the quail liver. | histones were extracted from the liver of young, adult and old japanese quails. both linker and core histones were found to vary with age. an extra band, h3x, was found between h2a and h4. its level is higher in young and old birds in comparison to that of the adult. h3x shows interesting changes under steroid induction. its level is higher in progesterone administered young birds. in adult and old birds, it is higher in progesterone treated (p) and progesterone primed estradiol administered (p+ ... | 2004 | 15374037 |
| effect of 17beta estradiol and progesterone on the conformation of the chromatin of the liver of female japanese quail during aging. | plasma levels of 17beta estradiol and progesterone were measured by radioimmunoassay in immature, adult and old female japanese quails. the levels of progesterone and the progesterone/estradiol ratio were maximum in adult, egg laying birds. conformation of the chromatin of the liver of birds of various ages before and after administration of steroid hormones was studied by digesting the nuclei with micrococcal nuclease (mnase) and pancreatic deoxyribonuclease i (dnase i) followed by electrophore ... | 2004 | 15374094 |
| cdna array analysis of japanese quail lines divergently selected for four-week body weight. | decades of divergent selection for 4-wk bw has produced 3 lines of growth-selected japanese quail. p line quail have been selected for >110 generations for 4-wk posthatch bw and are nearly 3-fold larger than the randomly bred control c line. the h line has been selected for high 4-wk bw for 52 generations and the l line has been selected for low 4-wk bw for 54 generations. to identify differentially expressed genes that may play a role in defining the differences in these lines, a dna array cont ... | 2004 | 15384902 |
| isolation of e. coli from foam and effects of fluoroquinolones on e. coli and foam production in male japanese quail. | sexually active male japanese quail (coturnix coutrnix japonica) produce a foamy substance from their cloacal gland. it was postulated that bacteria played an important role in production of foam. the primary objective of this study was to isolate and identify bacteria present in the cloacal foam. the secondary objective was to evaluate the effect of fluoroquinolone treatment on bacterial counts and foam production. healthy adult japanese quail were maintained in individual cages under uniform h ... | 2004 | 15451247 |
| factors considered in using birds for evaluating endocrine-disrupting chemicals. | documented effects on fish and wildlife populations, coupled with evidence from human poisonings, epidemiology, and experimental toxicology, led to the formation of the endocrine disruptor screening program within the us environmental protection agency. the main objectives of the program are to validate and implement the screens and tests that have been proposed for evaluating possible endocrine-disrupting activity of chemicals. an avian two-generation test is one of the recommended higher tier ... | 2004 | 15454685 |
| polymorphism of dopamine receptor d4 exon i corresponding region in chicken. | in stockbreeding, there are indications that behavioral traits of livestock have an effect on breeding and production. if the variation in individual behavior is related to that in neurotransmitter-related genes such as in humans, it would be possible to breed pedigrees composed of individuals having behavioral traits that are useful to production and breeding using selection based on genotypes. in this study, we investigated the exon i region of dopamine receptor d4 (drd4), in which variation i ... | 2004 | 15459452 |
| hydropericardium syndrome in japanese quail (coturnix coturnix japonica). | 2004 | 15461367 | |
| seasonal change in luteinizing hormone subunit mrna in japanese quail and effects of short daylength and low temperature. | changes in pituitary mrna levels of lhbeta-subunit (lhbeta) and glycoprotein hormone alpha-subunit (common alpha) were investigated in male japanese quail under natural and laboratory conditions to clarify the mechanisms of seasonal regulation of luteinizing hormone (lh) secretion. in experiment 1, birds were kept in outdoor cages under natural conditions from august for 12 months. both lhbeta and common alpha mrna levels decreased rapidly from august to september, and after a period of low leve ... | 2004 | 15474534 |
| aging influences cellular and molecular responses of apoptosis to skeletal muscle unloading. | the influence of aging on skeletal myocyte apoptosis is not well understood. in this study we examined apoptosis and apoptotic regulatory factor responses to muscle atrophy induced via limb unloading following loading-induced hypertrophy. muscle hypertrophy was induced by attaching a weight to one wing of young and aged japanese quails for 14 days. removing the weight for 7 or 14 days after the initial 14 days of loading induced muscle atrophy. the contralateral wing served as the intra-animal c ... | 2005 | 15483226 |
| hormonal regulation of brain circuits mediating male sexual behavior in birds. | male sexual behavior in both field and laboratory settings has been studied in birds since the 19th century. birds are valuable for the investigation of the neuroendocrine mechanisms of sexual behavior, because their behavior can be studied in the context of a large amount of field data, well-defined neural circuits related to reproductive behavior have been described, and the avian neuroendocrine system exhibits many examples of marked plasticity. as is the case in other taxa, male sexual behav ... | 2004 | 15488549 |
| an animal model of fetishism. | an animal model of sexual fetishism was developed with male japanese quail based on persistence of conditioned sexual responding during extinction to an inanimate object made of terrycloth (experiments 1 and 3). this persistent responding occurred only in subjects that came to copulate with the terrycloth object, suggesting that the copulatory behavior served to maintain the fetishistic behavior. sexual conditioning was carried out by pairing a conditioned stimulus (cs) with the opportunity to c ... | 2004 | 15500813 |
| the effects of aromatase inhibition on testosterone-dependent conditioned rhythmic cloacal sphincter movements in male japanese quail. | male japanese quail produce a foam that, along with semen, is transferred to the quail hen during copulation. this foam has been reported to increase fertility, prolong sperm motility, and enhance sperm competition. action of the cloacal sphincter muscles in response to visual exposure to a female produces the foam. the rhythmic cloacal sphincter movements (rcsm) responsible for foam production in male quail is elicited by a conditioned stimulus (cs) previously paired with access to a quail hen. ... | 2004 | 15501496 |
| involvement of interaction of zp1 and zpc in the formation of quail perivitelline membrane. | the extracellular matrix surrounding the oocyte before ovulation is called the perivitelline membrane (pl) in avian species. we have previously reported that one of its components, zpc, is produced in ovarian granulosa cells by the stimulation of follicle-stimulating hormone and testosterone. another component, zp1, is synthesized in the liver and might be transported to the surface of the oocyte of the follicles. these glycoproteins are assembled to form a three-dimensional network of coarse fi ... | 2004 | 15503149 |
| isolation and characterization of four vip-related peptides from red-bellied newt, cynops pyrrhogaster. | four novel bioactive peptides were isolated from the red-bellied newt, cynops pyrrhogaster, using a bioassay system monitoring the rectum contraction of the japanese quail, coturnix japonica. as these peptides are structurally related to vasoactive intestinal polypeptide (vip), we termed these peptides newt vip-related peptides 1, 2, 3, and 4 (nvrp-1, -2, -3, and -4). the primary sequences of these peptides were determined to be hsdavftdnysrllgktalknyldgalkke (nvrp-1), hsdavftdnysrllaktalknyldga ... | 2004 | 15518909 |
| aromatase inhibition blocks the expression of sexually-motivated cloacal gland movements in male quail. | in japanese quail (coturnix japonica), activation of appetitive and consummatory aspects of male sexual behavior requires aromatization of testosterone (t) into estrogens. appetitive male sexual behavior (asb) is usually assessed with the use of a learned social proximity procedure. in the present experiment, we investigated the role of estrogens in the activation of an another index of asb, the female-induced activation of rhythmic cloacal sphincter movements (rcsms) that are produced in reacti ... | 2004 | 15518995 |
| embryonic co-exposure to methoxychlor and clophen a50 alters sexual behavior in adult male quail. | embryonic exposure to estrogens and estrogenic pollutants is known to demasculinize sexual behavior in adult male japanese quail. in the present study, we administered the insecticide methoxychlor to quail eggs at a dose of 150 microg/g egg and then studied sexual behavior and other reproductive variables in adult males. in a second experiment we administered the same dose of methoxychlor together with 10 microg/g egg of the commercial polychlorinated biphenyl (pcb) mixture clophen a50 (ca50) an ... | 2005 | 15526189 |
| electrophysiological and neurochemical characterization of neurons of the medial preoptic area in japanese quail (coturnix japonica). | intracellular recordings of medial preoptic neurons demonstrated that most neurons show a spontaneous firing, a linear i-v relationship and low-threshold-like events suppressed by the application of ni2+. some neurons had a depolarizing sag of the membrane potential in response to hyperpolarizing current pulses. the majority of the cells exhibited a robust spontaneous synaptic activity suppressed by sr95531 (100 microm), a gabaa receptor antagonist, and/or by 6-cyano-7-nitroquinoxaline-2,3-dione ... | 2004 | 15542078 |
| effects of long-term dietary lipids on mature bone mineral content, collagen, crosslinks, and prostaglandin e2 production in japanese quail. | this study investigated the effects of long-term dietary lipids on mature bone mineral content, collagen concentration, crosslink levels, bone marrow and ex vivo prostaglandin e2 (pge2) biosynthesis, as well as the relationship of pge2 production to these bone formation parameters. one-month-old male japanese quail were given a basal diet containing 1 of 4 lipid sources: soybean oil (sbo), hydrogenated soybean oil (hsbo), chicken fat (cf), or menhaden fish oil (fo) at 50 g/kg of the diet. at 8 m ... | 2004 | 15554065 |
| 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 |
| the discriminative stimulus effects of cocaine in a pavlovian sexual approach paradigm in male japanese quail. | two groups of male japanese quail (coturnix japonica) were trained [corrected] to discriminate cocaine from saline in a conditioned approach procedure maintained by sexual reinforcement. for 1 group, cocaine (10 mg/kg ip) was administered prior to a conditioned stimulus (cs) that predicted copulation; saline followed by a cs predicted no copulation. a second group underwent the opposite training regimen. results revealed apparent between-group differences in the rates of acquisition of the discr ... | 2004 | 15571440 |
| chronic cocaine pretreatment facilitates pavlovian sexual conditioning in male japanese quail. | repeated drug exposure that results in behavioral sensitization has been shown to enhance sex-seeking behaviors in rats as well as facilitate pavlovian excitatory and inhibitory conditioning. in the present experiment, male japanese quail were given repeated presentations of cocaine (10 mg/kg, i.p.) that resulted in increased locomotor activity relative to saline. after a 10-day withdrawal period, subjects received sexual conditioning trials that consisted of presentation of an object conditione ... | 2004 | 15582016 |
| the japanese quail: a model for studying reproductive aging of hypothalamic systems. | during aging, the decline of neuroendocrine, endocrine, and behavioral components of reproduction ultimately leads to reproductive failure. these studies considered both neuroendocrine and behavioral aspects of reproductive aging in japanese quail, using chronological age and reproductive status to separate animals into experimental groups. in study i, age-related changes in the gonadotropin releasing hormone (gnrh-i) system were investigated and a sharp decrease was observed in gnrh-i concentra ... | 2004 | 15582284 |
| the chicken immediate-early gene zenk is expressed in the medio-rostral neostriatum/hyperstriatum ventrale, a brain region involved in acoustic imprinting, and is up-regulated after exposure to an auditory stimulus. | the immediate-early gene zenk (an acronym for the avian orthologue of the mammalian genes zif-268, egr-1, ngfi-a and krox-24) has been extensively employed, in studies on oscine birds, as a marker of neuronal activity to reveal forebrain structures that are involved in the memory processes associated with the acquisition, perception and production of song. audition-induced expression of this gene, in brain, has also recently been reported for the domestic chicken (gallus gallus domesticus) and t ... | 2005 | 15590145 |
| effects of prolonged administration of aflatoxin b1 and fumonisin b1 in laying japanese quail. | in the present study, 288 8-wk-old japanese quail were randomly distributed into 6 experimental groups (48 birds per group) and fed the following diets for 140 d: 1) 0 (control); 2) 10 mg of fumonisin b1 (fb1); 3) 50 microg of aflatoxin b1 (afb1); 4) 50 microg of afb1 + 10 mg of fb1; 5) 200 microg of afb1; and 6) 200 microg of afb1 + 10 mg of fb1/kg of feed. each treatment consisted of 4 replicates of 12 quail. egg production and individual egg weight were checked daily. feed intake and feed con ... | 2004 | 15615006 |
| the effect of dietary conjugated linoleic acid on egg yolk fatty acids and hatchability in japanese quail. | conjugated linoleic acid (cla) increased the ratio of saturated fatty acids to monounsaturated fatty acids in yolk and caused embryo mortality. our preliminary studies showed that cla had less of an effect on hatchability of quail than chickens. hence, the objective was to determine the effects of dietary cla on quail egg fatty acid content and hatchability. eight male-female japanese quail pairs per group were randomly assigned to diets containing 0 (canola oil; co), 0.25, 0.5, 1, 2, or 3% cla ... | 2004 | 15615015 |
| effect of chronic progesterone injection on egg production in japanese quail. | young laying turkey hens ceased laying and developed a polycystic ovarian follicle (pcof) syndrome 3 wk after injections of progesterone (p4) ceased. it was hypothesized that laying japanese quail chronically injected with progesterone (p4) would respond with reduced or arrested egg production and altered ovarian morphology similar to that seen in turkeys expressing the pcof syndrome, and could thus serve as a model to study the pcof syndrome. to test these hypotheses, 6 trials were conducted wi ... | 2004 | 15615020 |
| lycopene supplementation prevents the development of spontaneous smooth muscle tumors of the oviduct in japanese quail. | leiomyomas (fibroids) are benign tumors of the uterus affecting millions of women. spontaneous leiomyomas of the oviduct are common tumors of the japanese quail (coturnix coturnix japonica), which makes it a good animal model for screening potential agents for testing in the prevention and treatment of human myoma uteri. because dietary intake of lycopene has been associated with a reduced risk of a variety of human cancers, we investigated the effects of lycopene supplementation on the developm ... | 2004 | 15623465 |
| production of quail (coturnix japonica) germline chimeras by transfer of gonadal primordial germ cells into recipient embryos. | the possibility of producing quail germline chimeras by the transfer of gonadal primordial germ cells (gpgcs) into recipient embryos was investigated. japanese quail of the black (d: homozygous for the autosomal incomplete dominant gene d) and wild-type plumage (wp: d+/d+) strains were used as donors and recipients, respectively. gonadal cells were retrieved from the gonads of 5-day-old d embryos, and gpgcs were enriched by magnetism-activated cell sorting. fresh (noncultured) gpgcs or those iso ... | 2005 | 15629796 |
| endogenous neuromedin u has anorectic effects in the japanese quail. | neuromedin u (nmu), which is a brain-gut peptide, was first isolated as a smooth-muscle-contracting peptide from the porcine spinal cord in 1985. intracerebroventricular (icv) injection of nmu into rats significantly reduced the food intake during dark period, and increased oxygen consumption, locomotor activity, and body temperature suggested that nmu is an anorectic and catabolic signaling molecule in mammals. in this study, we elucidated the central role of nmu in avian species using japanese ... | 2004 | 15639143 |
| a novel g protein-coupled receptor for gonadotropin-inhibitory hormone in the japanese quail (coturnix japonica): identification, expression and binding activity. | we recently identified a novel hypothalamic dodecapeptide inhibiting gonadotropin release in the japanese quail (coturnix japonica). this novel peptide was therefore named gonadotropin-inhibitory hormone (gnih). the gnih precursor encoded one gnih and two gnih-related peptides (gnih-rp-1 and gnih-rp-2) that shared the same c-terminal motif, leu-pro-xaa-arg-phe-nh(2) (xaa=leu or gln; lpxrf-amide peptides). identification of the receptor for gnih is crucial to elucidate the mode of action of gnih. ... | 2005 | 15642802 |
| enhanced yolk testosterone influences behavioral phenotype independent of sex in japanese quail chicks coturnix japonica. | studies have demonstrated an effect of yolk testosterone levels on the physiology and behavior of nestling birds. in order to investigate this phenomenon experimentally in a precocial bird, we enhanced yolk testosterone, but within the physiological range, by injecting 50 ng testosterone in ethanol into japanese quail coturnix japonica eggs prior to incubation. the chicks hatching from these as well as from control eggs that had received the carrier-only or were left unmanipulated were subject t ... | 2005 | 15664022 |
| quail cell lines supporting replication of marek's disease virus serotype 1 and 2 and herpesvirus of turkeys. | marek's disease virus (mdv), a highly cell-associated alphaherpesvirus, can be isolated and propagated in chicken kidney cells (ckc) and chicken or duck embryo fibroblast cells (cef or def, respectively). two recently developed cell lines, cu447 and cu453, developed from methylcholanthrene-induced tumors in japanese quail, were examined for their suitability to propagate the three serotypes of mdv. the mdv strain rb-1b (serotype 1) was passaged for more than 30 passages in cu447 without causing ... | 2004 | 15666861 |
| inhibition of steroid receptor coactivator-1 blocks estrogen and androgen action on male sex behavior and associated brain plasticity. | studies of eukaryotic gene expression demonstrate the importance of nuclear steroid receptor coactivators in mediating efficient gene transcription. however, little is known about the physiological role of these coactivators in vivo. in japanese quail, the steroid receptor coactivator-1 (src-1) is broadly expressed in steroid-sensitive brain areas that control the expression of male copulatory behavior, and we investigated the role of this coactivator by antisense technology. daily intracerebrov ... | 2005 | 15673671 |
| sexual behavior activates the expression of the immediate early genes c-fos and zenk (egr-1) in catecholaminergic neurons of male japanese quail. | we analyzed the expression of the immediate early genes c-fos and zenk (egr-1) in the brain of male quail that were gonadally intact (i) or castrated and treated (cx+t) or not (cx) with testosterone and had been exposed for 60 min either to a sexually mature female (f), or to an empty arena (ea) or were left in their home cage (hc). alternate sections in the brains collected 90 min after the start of behavioral interactions were stained by immunocytochemistry for the proteins fos or zenk alone o ... | 2005 | 15680688 |
| nongenomic inheritance of emotional reactivity in japanese quail. | avian scientific literature includes few reports on the influence of characteristics of mothers on the behavior of their offspring. by comparing young domestic japanese quail raised by adoptive mothers with high levels of general emotional reactivity (e+ mothers) to young raised by adoptive mothers with low levels of general emotional reactivity (e- mothers), we evaluated the influence of characteristics of mothers on the behavioral development of their offspring. our results revealed that gener ... | 2005 | 15690384 |
| in vitro metabolism of [14c]methoxychlor in rat, mouse, japanese quail and rainbow trout in precision-cut liver slices. | 1. the in vitro metabolism of [14c]methoxychlor (mxc) has been studied using precision-cut liver slices from the sprague-dawley male rat, cd-1 male mouse, we strain male japanese quail and juvenile rainbow trout (oncorhynchus mykiss). the results demonstrated integrated phase i and ii metabolism of mxc and species differences in the metabolic profiles were observed. 2. in rat liver slice preparations, mxc was rapidly metabolized to bis-oh-mxc by sequential o-demethylation followed by subsequent ... | 2004 | 15690762 |
| ultrastructural and immunohistochemical studies of medullary bone calcification, with special reference to sulphated glycosaminoglycans. | histochemical, immunohistochemical and electron energy-loss spectroscopic studies were performed to examine the relationship between sulphated glycosaminoglycans and medullary bone calcification using oestrogen-injected male japanese quail. sulphated glycosaminoglycans, detected by high iron diamine (hid) or hid-thiocarbohydrazide-silver protein (hid-tch-sp) methods, were distributed throughout the matrix of medullary bone, some periphery and extending tips of the trabeculae stained weakly, and ... | 2005 | 15695482 |
| effect of dietary fumonisin b1 on laying japanese quail. | 1. a 28-d experiment was conducted to evaluate the effects of fumonisin b1 (fb1) on egg production and egg quality of young laying japanese quail fed on fumonisin-contaminated rations. 2. to this end, 128 7-week-old birds were randomly distributed into 4 experimental groups (32 birds per group) and given rations containing 0 (control), 10, 50 and 250mg fb1/kg feed. each treatment consisted of 4 replicates of 8 quail. egg production and egg weight were checked daily. feed consumption and feed con ... | 2004 | 15697020 |
| influence of dietary culture material containing aflatoxin and t(2) toxin on certain serum biochemical constituents in japanese quail. | forty newly hatched unsexed japanese quail (coturnix coturnix japonica) chicks were fed diets containing 3 ppm aflatoxin (af) and 4 ppm t(2) toxin either singly and in combination for 35 days. sera samples were collected from six birds in each group at the end of the trial to study the effect of certain serum biochemical parameters. highly significant (p < 0.01) differences were observed for serum total protein, albumin, globulin, glucose, cholesterol, aspartate transaminase (ast), alanine trans ... | 2004 | 15702271 |
| inter-individual variability during morning choruses in japanese quail males (coturnix coturnix japonica). | we compared the organization of dawn choruses in five groups of japanese quail, coturnix coturnix japonica, males (four groups of kin-related males and one group of unrelated males). we documented the structure of chorus groups: one male sang much more than the others during the dawn peak in four of the five groups, and this regardless of the number of males in the group. the dominant singers were then removed from two similar-sized groups, one of kin-related (k3) and the other of unrelated (nk) ... | 2005 | 15714884 |
| 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 |
| the effect of genistein supplementation on performance and antioxidant status of japanese quail under heat stress. | genistein, a phytoestrogen found in soybeans, is a powerful antioxidant. we evaluated the effects of genistein supplementation on performance, carcass characteristics, levels of malondialdehyde (mda), homocysteine, vitamins c, e, a in japanese quail (coturnix coturnix japonica) exposed to high ambient temperature of 34 degrees c. two hundred and forty japanese quails (10 d old) were randomly assigned to eight treatment groups consisting of 10 replicates of three birds. the birds were kept in an ... | 2004 | 15732579 |
| somatostatin immunoreactivity in quail pterygopalatine ganglion. | in the ciliary ganglion of the chicken and quail, somatostatin (som) is an exclusive marker for parasympathetic postganglionic neurons innervating the choroid. a second parasympathetic pathway projecting to the choroid originates from the pterygopalatine ganglion. the aim of this study was to investigate som immunoreactivity in the pterygopalatine ganglion of the japanese quail (coturnix coturnix japonica) and on neurons within the choroid, the intrinsic choroidal neurons (icn). we did so using ... | 2005 | 15733297 |
| avoidance of relatively aggressive male japanese quail (coturnix japonica) by sexually experienced conspecific females. | sexually experienced female japanese quail (coturnix japonica) that are offered a choice between 2 conspecific males previously observed engaging in an aggressive encounter prefer to affiliate with the less aggressive male. the authors determined whether this apparent preference for less aggressive males results from females approaching less aggressive individuals or avoiding more aggressive individuals. the authors found that females that had seen 2 males fight before choosing, in counterbalanc ... | 2005 | 15740424 |
| androgen mediation of conditioned rhythmic cloacal sphincter movements in japanese quail (coturnix japonica). | demonstrations of increased reproductive success due to sexual conditioning in japanese quail (coturnix japonica) have been reported, although the mechanisms that underlie these effects have remained elusive. one possible mechanism is conditioned rhythmic cloacal sphincter movements (rcsm). two experiments were conducted with male quail to determine whether associations between a conditioned stimulus (cs) and a hen would result in the ability of the cs to elicit rcsm, and to explore the androgen ... | 2005 | 15740429 |
| the reciprocal switching of two thyroid hormone-activating and -inactivating enzyme genes is involved in the photoperiodic gonadal response of japanese quail. | the molecular mechanisms underlying photoperiodic time measurement are not well understood in any organism. relatively recently, however, it has become clear that thyroid hormones play an important role in photoperiodism, and in a previous study we reported that long daylengths in japanese quail increase hypothalamic levels of t(3) and of the thyroid hormone-activating enzyme, type 2 iodothyronine deiodinase. the present study extends these observations to measure gene levels of the thyroid horm ... | 2005 | 15746251 |
| different effects of peripheral and central ghrelin on regulation of food intake in the japanese quail. | when rat or human ghrelin is administered to chickens or rats it stimulates the release of growth hormone, however, its effects on food intake differ between the two species. to investigate this discrepancy, we measured plasma ghrelin concentrations before and after food intake, and determined the effects of central (intracerebroventricular, icv) and peripheral (intraperitoneal, ip) injections of various ghrelin doses on food intake and body temperature in the japanese quail. in control quails, ... | 2005 | 15748719 |
| reassessment of ecotoxicities of 1,1,1-trichloro-2,2-bis(4-chlorophenyl)ethane in japanese quail under the oecd draft new avian one-generation reproduction test guideline. | ecotoxicological hazards of 1,1,1-trichloro-2,2-bis(4-chlorophenyl)ethane (p,p'-ddt) were investigated by a one-generation reproduction study using japanese quail (coturnix coturnix japonica) under an organization for economic co-operation and development (oecd) draft new test guideline 206 following acute and subchronic toxicity studies. in the subchronic feeding toxicity study, tremors, convulsions, and deaths were observed with a clear sex difference, males being more susceptible than females ... | 2005 | 15748794 |
| two new plumage mutations in the japanese quail: "curly" feather and "rusty" plumage. | the genetics of plumage of japanese quail is of interest both from a biological standpoint, for comparative studies between avian species, and from a zootechnical standpoint, for identifying commercial selection lines or crosses. there are only few plumage mutations reported in quail, and the present work describes a new color variant "rusty" and a new feather structure "curly", and their heredity from an f1 and f2 segregation experiment. | 2005 | 15760477 |
| effects of dietary chromium supplementation on performance, carcass traits, serum metabolites, and tissue chromium levels of japanese quails. | this study was conducted to investigate the effects of various levels of dietary chromium supplementation on performance, carcass traits, blood chemistry, and tissue distribution of chromium (cr3+) in quails. two hundred forty 1-d-old japanese quails were divided into five groups with four replicates and were fed a basal diet or the basal diet supplemented with 20, 40, 80, or 100 mg/kg cr (crcl3.6h2o) until 38 d of age. chromium supplementation decreased carcass fat percentage, serum low-density ... | 2005 | 15772442 |
| infectivity of blastocystis isolates from chickens, quails and geese in chickens. | the infectivity of six blastocystis isolates obtained from two domestic chickens, two japanese quails and two domestic geese, were examined in 1-week-old male chicks. all six isolates were able to infect the chicks via the intracecal inoculation of 1x10(6) cells of cultured organisms. since the infected chicks discharged many cysts in their feces, the infectivity of the concentrated cysts in chicks was compared among three isolates from different bird species. the ck86-1 and qq93-3 isolates, whi ... | 2005 | 15772866 |
| effect of alliums on total lipid in plasma and tissues of japanese quails (coturnix coturnix japonica) with respect to age and sex. | dietary onion and garlic caused an increase in the level of liver and plasma total lipids in coturnix coturnix japonica. this increase could be due to the effect of an increased feed intake, bile production, digestion and absorption that in turn caused an increased utilisation of dietary fat, increased transfer of dietary lipids to the liver and/or due to increased lipogenesis as such. however, there was no increase in the muscle lipid content. this effect in the muscle could be due to inhibitor ... | 2005 | 15782822 |
| idiopathic intranuclear inclusion bodies in the renal tubular epithelia of japanese quail (coturnix coturnix japonica). | we report idiopathic intranuclear inclusion bodies in the renal tubular epithelia of two cases of among the 960 japanese quail (coturnix coturnix japonica) in the course of the acute oral toxicity and dietary toxicity test. basophilic inclusion bodies were seen only in the nuclei of renal tubular epithelia. we could not classify our case into any adenovirus infection by clinical signs and lesions. the inclusion bodies were only identified as adenovirus-like particles based upon the electronmicro ... | 2005 | 15785127 |
| carry over (transfer) of feed-borne acrylamide into eggs, muscle, serum, and faeces - a pilot study with japanese quails (coturnix coturnix japonica). | two groups of 10 quails each were fed for 30 days on a diet containing either 663 microg feed-borne acrylamide (aa)/kg feed (group b) or 2472 microg aa/kg feed (group c) respectively. the concentrations of aa present in excreta and eggs were compared with those measured in eggs and excreta obtained from a control group (group a) fed on a diet low in aa (<10 microg/kg). the results clearly showed that the eggs of quails in group c contained approximately 53-112 microg aa/kg based on dry weight, w ... | 2013 | 15787975 |
| assessing the consequences of the pesticide methoxychlor: neuroendocrine and behavioral measures as indicators of biological impact of an estrogenic environmental chemical. | japanese quail provide an advantageous avian model for assessing long-term biological consequences of endocrine disrupting chemicals (edcs). these studies examined route of exposure and vulnerability to biological impact of edcs over the life cycle in a precocial avian model, the japanese quail. embryonic exposure occurs with maternal deposition and methoxychlor (mxc) accumulated with maternal exposure. egg injections of mxc or estradiol at selected stages of development impacted hypothalamic ne ... | 2005 | 15811582 |
| effects of endocrine modulators on sexual differentiation and reproductive function in male japanese quail. | a number of environmental contaminants have been shown to interfere with the endocrine system. many of these compounds bind to estrogen receptors, thereby potentially disrupting estrogen-regulated functions. in this paper, we review some background data on avian sexual differentiation and present some of the results from our studies on effects of estrogenic chemicals administered during sexual differentiation in the japanese quail. initially, our goal was to elucidate whether a decreased male se ... | 2005 | 15811583 |
| organizational effects of diethylstilbestrol on brain vasotocin and sexual behavior in male quail. | in japanese quail, we previously described a sexual dimorphism of the parvocellular vasotocin system of the limbic region that, as the reproductive behavior, is steroid-sensitive and is organized during embryonic life by the exposure to estradiol. we verified in this study whether diethylstilbestrol, a chemical xenoestrogen, has analogous organizational effects on the vasotocin system of limbic regions and on copulatory behavior of male japanese quail. we injected in the yolk sac of 3 day-old qu ... | 2005 | 15811585 |
| attempts to identify the source of avian vacuolar myelinopathy for waterbirds. | attempts were made to reproduce avian vacuolar myelinopathy (avm) in a number of test animals in order to determine the source of the causative agent for birds and to find a suitable animal model for future studies. submerged vegetation, plankton, invertebrates, forage fish, and sediments were collected from three lakes with ongoing outbreaks of avm and fed to american coots (fulica americana), mallard ducks and ducklings (anas platyrhynchos), quail (coturnix japonica), and laboratory mice eithe ... | 2005 | 15827222 |
| atrazine and the hypothalamo-pituitary-gonadal axis in sexually maturing precocial birds: studies in male japanese quail. | the herbicide atrazine is a putative endocrine disruptor. the present studies investigated the effects of atrazine in male japanese quail during sexual maturation. atrazine was administered for two weeks in the diet or systemically to birds under long photoperiods. atrazine had no effect on mortality but depressed both feed intake and growth (average daily gain [adg] in g/day) at dietary concentrations of 1000 ppm. atrazine in the diet at 10 ppm, but at no other concentrations, increased testes ... | 2005 | 15829615 |
| effect of enzyme supplementation on the metabolisable energy content of solvent-extracted rapeseed and sunflower seed meals for chicken, guinea fowl and quail. | (1) the nitrogen-corrected apparent metabolisable energy (ame(n)) content of solvent-extracted rapeseed and sunflower seed (un-decorticated) meals in relation to species (chicken, guinea fowl and quail) and dietary addition of feed enzymes (0 or 0.5 g/kg diet) was evaluated by a diet replacement method in a 3 x 2 factorial design. (2) the metabolism trial was conducted at two substitution levels (200 and 400 g/kg diet) of each meal with or without supplementation of commercial enzyme preparation ... | 2005 | 15835255 |
| incorporation of competitive effects in forest tree or animal breeding programs. | competition among domesticated plants or animals can have a dramatic negative impact on yield of a stand or farm. the usual quantitative genetic model ignores these competitive interactions and could result in seriously incorrect breeding decisions and acerbate animal well-being. a general solution to this problem is given, for either forest tree breeding or penned animals, with mixed-model methodology (blup) utilized to separate effects on the phenotype due to the individuals' own genes (direct ... | 2005 | 15911590 |
| dietary modulation of lens zeaxanthin in quail. | although higher dietary intake of lutein/zeaxanthin has been associated with reduced risk for cataracts, the impact of dietary supplements on lens lutein (l) or zeaxanthin (z) has not been examined. if higher lens carotenoids do reduce risk for cataract, it would be essential to know whether dietary carotenoids can elevate carotenoids in the adult vertebrate lens. in this study, a covey of japanese quail were hatched and raised 6 months on carotenoid-deficient diet, then switched to deficient di ... | 2005 | 15913607 |
| effects of estrogen (17 beta-estradiol) and p-nonylphenol on the development of immune organs in male japanese quail. | the aim of this study was to determine the effects of estrogen and endocrine disrupters on the immune organs of japanese quail. we used p-nonylphenol (np) as a model endocrine disrupter. birds were injected with 17 beta-estradiol (e2) in doses of 1, 0.1 and 0.01 ng/g body weight and np in doses of 1000, 100 and 10 ng/g body weight from 4 to 7 weeks of age. the data indicate injection of e2 during the growth phase resulted in cyst formation, increased connective tissue, disappearance of lymphoid ... | 2005 | 15915150 |
| construction of a genetic linkage map of japanese quail (coturnix japonica) based on aflp and microsatellite markers. | the japanese quail (coturnix japonica) is a notably valuable egg and meat producer but has also been used as a laboratory animal. in the present study, we constructed a japanese quail linkage map with 1735 polymorphic amplified fragment length polymorphisms markers, and nine chicken microsatellite (ms) markers, as well as sex and phenotypes of two genetic diseases; a muscular disorder (lwc) and neurofilament-deficient mutant (quv). linkage analysis revealed 578 independent loci. the resulting li ... | 2005 | 15932402 |
| rapid decreases in preoptic aromatase activity and brain monoamine concentrations after engaging in male sexual behavior. | in japanese quail, as in rats, the expression of male sexual behavior over relatively long time periods (days to weeks) is dependent on the local production of estradiol in the preoptic area via the aromatization of testosterone. on a short-term basis (minutes to hours), central actions of dopamine as well as locally produced estrogens modulate behavioral expression. in rats, a view of and sexual interaction with a female increase dopamine release in the preoptic area. in quail, in vitro brain a ... | 2005 | 15932925 |
| effects of calorie restriction on reproductive and adrenal systems in japanese quail: are responses similar to mammals, particularly primates? | the benefits of calorie restriction (cr) have been established across a variety of vertebrate and invertebrate species. although the effects of cr on lifespan in birds have not been examined, it is clear that cr has beneficial effects on reproductive, metabolic, and physiological function in adult poultry. we examined the effects of cr in japanese quail, a rapidly maturing avian model, on reproductive endocrine and neuroendocrine systems. male japanese quail were pair fed at 0% ad libitum (al), ... | 2005 | 15935442 |
| dopamine modulates male sexual behavior in japanese quail in part via actions on noradrenergic receptors. | in rats, dopamine (da) facilitates male sexual behavior through its combined action on d1- and d2-like receptors, in the medial preoptic area (mpoa) as well as other brain areas. in japanese quail, systemic injections of dopaminergic drugs suggested a similar pharmacology but central injections have never been performed. recent electrophysiological experiments demonstrated that da effects in the mpoa of quail are mediated mainly through the activation of alpha2-noradrenergic receptors. previous ... | 2005 | 15936834 |
| microsatellite mapping of qtl affecting growth, feed consumption, egg production, tonic immobility and body temperature of japanese quail. | the japanese quail (coturnix japonica) is both an animal model in biology and a commercial bird for egg and meat production. modern research developments with this bird, however, have been slowed down by the limited information that is available on the genetics of the japanese quail. recently, quail genetic maps with microsatellites and aflp have been produced which open the way to comparative works with the chicken (gallus gallus), and to qtl detection for a variety of traits. the purpose of th ... | 2005 | 15941487 |
| early embryonic administration of xenoestrogens alters vasotocin system and male sexual behavior of the japanese quail. | the copulatory behavior and the parvocellular vasotocin (vt) system of the nucleus of the stria terminalis (bst) are sexually dimorphic in the japanese quail. embryonic administration of estradiol benzoate (eb) induces an organizational effect determining the disappearance of such a dimorphism (male shows behavior and cerebral phenotype of the female). the vt parvocellular system can therefore be considered an accurate marker of the sexual differentiation of brain circuits and a very sensitive i ... | 2005 | 15950431 |
| laser pressure catapulting followed by b actin gene identification in japanese quail macrochromosomes and microchromosomes using teflon-coated coverslip slides. | laser microdissection of individual mammalian chromosomes (> 2 microm) has been achieved though the use of a microscope slide coated with a polyethylene naphthalate (pen) membrane. although these slides have proved sufficient for larger chromosomes, they are insufficient for small chromosomes (< 1 microm). we have developed a new type of slide which allows laser microdissection of single japanese quail microchromosomes (0.5 microm) and macrochromosomes (3-4 microm). to test the usefulness of the ... | 2005 | 15958014 |
| rapid effects of aromatase inhibition on male reproductive behaviors in japanese quail. | non-genomic effects of steroid hormones on cell physiology have been reported in the brain. however, relatively little is known about the behavioral significance of these actions. male sexual behavior is activated by testosterone partly through its conversion to estradiol via the enzyme aromatase in the preoptic area (poa). brain aromatase activity (aa) changes rapidly which might in turn be important for the rapid regulation of behavior. here, acute effects of vorozole, an aromatase inhibitor, ... | 2006 | 15963995 |
| supplementation of zinc from organic or inorganic source improves performance and antioxidant status of heat-distressed quail. | two sources of zinc [znso4.h2o or znpicolinate (znpic)] supplementation were evaluated for their effects on performance, carcass weight, levels of malondialdehyde, and vitamins c, e, a in japanese quail (coturnix coturnix japonica) exposed to high ambient temperature of 34 degrees c. the birds (n = 360; 10-d-old) were randomly assigned to 12 treatment groups consisting of 3 replicates of 10 birds each in a 2 x 2 x 3 factorial arrangement of treatments (temperatures, zinc sources, zinc levels). b ... | 2005 | 15971524 |
| intestinal d-glucose and l-alanine transport in japanese quail (coturnix coturnix). | the mechanisms involved in d-glucose and amino acid transport in the intestine of birds are still not clear. in chickens, d-glucose and amino acid absorption occurs via carrier-mediated transport, but in wild birds a passive paracellular mechanism seems to be the predominant pathway. the purpose of this work was to determine the existence of carrier-mediated sodium cotransport of d-glucose and l-alanine in the small intestine of japanese quail (coturnix coturnix), a granivorous bird. intestinal ... | 2005 | 15971535 |
| age-related apoptotic responses to stretch-induced hypertrophy in quail slow-tonic skeletal muscle. | in the present study, we examined the responses of apoptosis and apoptotic regulatory factors to muscle hypertrophy induced by stretch overload in quail slow-tonic muscles. the wings from one side of young and aged japanese quails were loaded by attaching a tube weight corresponding to 12% of the bird's body weight for 7 or 21 days. muscle from the contralateral side served as the intraanimal control. relative to the intraanimal contralateral control side, the muscle wet weight increased by 96% ... | 2005 | 15972839 |
| magnesium proteinate is more protective than magnesium oxide in heat-stressed quail. | we evaluated the effects of dietary supplementation with mg-oxide and mg-proteinate on performance; nutrient digestibilities; malondialdehyde (mda) concentrations in serum, liver, and thigh meat; and serum cholesterol and triacylglycerol concentrations in japanese quail (coturnix coturnix japonica) exposed to high ambient temperature. the birds (n = 360; 10 d old) were randomly assigned to 12 treatment groups consisting of 6 replicates of 5 birds each in a 2 x 2 x 3 factorial arrangement (temper ... | 2005 | 15987857 |
| impact of endocrine disrupting chemicals on reproduction in japanese quail. | many environmental contaminants can interact with the endocrine system, thereby potentially disrupting the reproductive fitness of individuals. in avian species, the egg-yolk is a major route for excretion of lipophilic compounds by the adult female bird and embryos are exposed to contaminants that have been deposited in the eggs. the reproductive and neuroendocrine system of japanese quail undergoes sexual differentiation during embryo development. the phenotypic sex, including sex-specific adu ... | 2005 | 15998507 |
| effects of dietary administration of cl-20 on japanese quail coturnix coturnix japonica. | hexanitrohexaazaisowurtzitane, or cl-20, is an emerging highly energetic compound currently under consideration for military applications. with the anticipated wide use of cl-20, there is the potential for soil and groundwater contamination resulting in adverse toxicologic effects on environmental receptors. presently, there is a lack of data describing the toxic effects of cl-20 on avian species. the present study describes the effect of cl-20 on japanese quail (coturnix coturnix japonica) modi ... | 2005 | 16001151 |
| effects of androgens and estrogens on crowings and distress callings in male japanese quail, coturnix japonica. | in male japanese quail, crowing behavior is considered to be strictly androgen-dependent. it was previously shown that in chicks, treatment with either testosterone or 5alpha-dihydrotestosterone (5alpha-dht; a non-aromatizable androgen) induced crowing with motivation for distress calling in acutely isolated conditions. many studies, however, have shown that the potencies of testosterone and 5alpha-dht in activating crowing in castrated males are different. to clarify the effects of androgenic a ... | 2006 | 16002068 |
| subcellular responses of p53 and id2 in fast and slow skeletal muscle in response to stretch-induced overload. | tumor suppressor p53 and inhibitor of dna-binding/differentiation id2 were examined after 7 or 21 days of wing weighting in fast patagialis (pat) and slow anterior latissimus dorsi (ald) wing muscles of young adult and old japanese quails. the contralateral wing served as the intra-animal control. seven days of loading increased pat and ald muscle weight by 28 and 96%, respectively, in young birds. pat and ald muscle weight was 49 and 179% greater, respectively, than control muscles after 21 day ... | 2005 | 16002773 |
| cloning of a quail homologue of hatching enzyme: its conserved function and additional function in egg envelope digestion. | the aim of the present study was to reveal molecular entities participating in the digestion of the egg envelope in the japanese quail, coturnix japonica. we isolated a 1,510-bp cdna from extraembryonic tissues of developing embryos and designated it quail hatching enzyme (qhe) cdna. the qhe cdna was found to code a protein molecule comprising an astacin protease domain in the n-terminal half and a complement subcomponents c1r/c1s, uegf, bmp1 (cub) domain in the c-terminal half. a phylogenetic a ... | 2005 | 16003522 |
| experimental salmonella enteritidis phage type 4 infection and egg transmission in japanese quails. | japanese quails were inoculated orally with 1 x 10(10) colony-forming units of salmonella enteritidis phage type 4 isolated from chicks to obtain information concerning s. enteritidis infection and egg transmission. the inoculation resulted in a bacteraemic infection with seeding of the liver, spleen, intestine, peritoneum, ovule, ovary and oviduct. some infected birds showed diarrhoea, ruffled feathers, depression, loss of appetite and death. however, most infected birds remained clinically nor ... | 1992 | 16031673 |
| administration of pregnant mare serum gonadotropin to japanese quail (coturnix coturnix japonica): dose response over seven days and comparison of delivery by daily injection or osmotic pump. | this study is part of a research programme that aims to develop a method of hormone treatment to stimulate breeding in female birds. the aims of this study were to compare dose rates and two different delivery methods, daily injection or osmotic pump, for hormone treatment of japanese quail (coturnix coturnix japonica) with pregnant mare serum gonadotropin (pmsg). | 2002 | 16032222 |
| short-term effects of carbendazim on the gross and microscopic features of the testes of japanese quails (coturnix coturnix japonica). | carbendazim, a metabolite of benomyl which is widely used as a fungicide, has been found to cause testicular and epididymal damage in laboratory rats, mice and hamsters. no studies of the effects of this chemical on the reproductive organs of birds have been reported previously. this report is that of an investigation on the response of the testis of the japanese quail to experimental administration of this chemical in sexually mature and active birds. a single dose (400 mg/kg body weight) of ca ... | 2005 | 16034611 |
| vitellogenin detection and chick pathology are useful endpoints to evaluate endocrine-disrupting effects in avian one-generation reproduction study. | to investigate additional endpoints for screening of endocrine disruptors in birds, effects of 17beta-estradiol (e2) on one-generation reproduction in the japanese quail (coturnix japonica) were assessed. pairs of the 10-week-old japanese quail were fed a low-phytoestrogen diet containing e2 at 0 (control), 10, 100, and 1,000 ppm for six weeks. in the e2 100- and 1,000-ppm groups, the parental quail represented marked toxic changes including high mortality, decreased food consumption, decreased ... | 2005 | 16050582 |
| pharmacokinetics of ketoprofen in japanese quail (coturnix japonica). | 2005 | 16050821 |