Publications
| Title | Abstract | Year Filter | PMID(sorted ascending) Filter |
|---|
| the leukocyte response of japanese quail to rous sarcoma virus-induced tumors. | in male japanese quail, different circulating leukocyte responses were observed for progressors (birds developing a massive tumor that persisted throughout the experiment) and regressors (birds developing a tumor that gradually disappeared) after initial challenge with rous sarcoma virus (rsv). blood was sampled before and at weekly intervals postinoculation. blood smears were prepared and stained with diff quik, and a light microscope (1000 x) was used in a direct count of 50 fields. leukocytes ... | 1994 | 7832716 |
| comparison of ultradian and circadian oscillations of carbon dioxide production by various endotherms. | carbon dioxide emission (vco2) was computed every 20 min from continuous co2 concentration recordings taken during 3-30 consecutive days, in strictly controlled environmental conditions, in 54 of1 mice, 99 japanese quail, 66 sprague-dawley rats, 50 hartley guinea pigs, 7 chicks, for 7-15 days on 2 cynomolgus monkeys, and for 24 h on 7 premature infants. this vco2 shows circadian and ultradian oscillations that were analyzed for frequencies and amplitudes in light-dark 12-h alternation (ld 12:12) ... | 1995 | 7840329 |
| alterations in histones of the liver and oviduct of japanese quail during aging. | age-related changes occur in histones of the liver and oviduct of the female quail. in the liver an extra histone band, named hcx, between h2a and h4, is observed that increases with age. in the oviduct, a large complex of histones is seen which is tissue-specific. this complex declines with increasing age. the changes in the histones of the oviduct of adult and old birds in response to estradiol and progesterone are age-related. in the adult, the histone-complex increases after administration o ... | 1994 | 7845393 |
| estradiol and androgen modulate chicken luteinizing hormone-releasing hormone-i release in vitro. | hypothalamic slices (1 mm) including medial basal hypothalamus and preoptic areas (mbh-poa) were taken from adult male japanese quail, placed in a short-term perifusion system, and exposed to estradiol or androgen. release of chicken lhrh-i (clhrh-i) was measured by an enzyme immunoassay specific for clhrh-i. in separate experiments, mbh-poa slices were exposed short-term to 5 alpha-dihydrotestosterone (5 alpha-dht, 10(-7) m) and testosterone (t, 10(-7) m), and short- or long-term to 17 beta est ... | 1994 | 7849191 |
| distribution and regulation of estrogen-2-hydroxylase in the quail brain. | the anatomical distribution and endocrine regulation of the estrogen-2-hydroxylase activity were investigated in the brain of adult male and female japanese quail. significant levels of enzymatic activity were detected in all brain regions that were studied, but the highest levels were observed in preoptic and hypothalamic brain nuclei that are known to contain high levels of aromatase activity. these data are consistent with previous results suggesting that the placental aromatase is also respo ... | 1994 | 7850484 |
| testosterone levels and the free running rhythm of feeding activity in japanese quail in darkness. | castrated male japanese quail were reared in total darkness for 7 months. in order to mimic changes in concentration of plasma testosterone during sexual development, the birds were implanted on three occasions with increasing numbers of testosterone-filled capsules. the feeding activity of each bird was recorded and concentrations of plasma testosterone were measured before and after capsules were implanted. the concentration of testosterone was around 0.05 ng/ml and the period of the free runn ... | 1994 | 7851715 |
| pharmacokinetics of sulphamethoxazole and trimethoprim administered intravenously and orally to japanese quails. | the pharmacokinetic behaviour of sulphamethoxazole and trimethoprim was studied after combined intravenous (i.v.) administration at doses of 20 mg/kg and 4 mg/kg, respectively, and after oral administration at doses of 50 mg/kg and 10 mg/kg. the serum concentration versus time data after i.v. administration were best described by the biexponential equations c = 34.77.e-2.655.t + 39.03.e-0.241.t for sulphamethoxazole and c = 3.29.e-3.878.t + 0.83.e-0.306.t for trimethoprim. mean biological half-l ... | 1994 | 7853455 |
| pharmacokinetics of apramycin in japanese quails. | 1994 | 7853466 | |
| drusen-like deposits in the outer retina of japanese quail. | histological examination of the outer retina of japanese quail (coturnix coturnix japonica) ranging in age from 4-48 months revealed the presence of drusen-like deposits which closely resemble those described in primate and human retinas. at both light and electron microscopic levels, these deposits were characterized by randomly distributed, granular and heterogenous materials. larger deposits with pleomorphic inclusions, often globular in shape, occurred more frequently in older quail, particu ... | 1994 | 7859816 |
| receptor binding in japanese quail selected for long or short tonic immobility. | japanese quail, selectively bred for long (lti) and short (sti) tonic immobility (ti) responses, are thought to represent high and low fear groups, respectively. to study the neurochemical mechanisms underlying the behavioral distinctions, binding parameters were determined at the benzodiazepine, 5-ht1a, 5-ht3, alpha 2, and opioid receptor sites in the forebrains of the two lines. no differences were found in 5-ht1a, 5-ht3, alpha 2, mu- or kappa-opioid receptor binding between the lines. the kd ... | 1994 | 7862716 |
| qce-6: a clonal cell line with cardiac myogenic and endothelial cell potentials. | a clonal cell line (qce-6) sharing many properties with splanchnic mesodermal cells has been derived from 20-methylcholanthrene-treated cardiogenic mesoderm of the japanese quail. qce-6 cells which have been stably maintained for over 4 years in vitro display positive staining with antibodies to cytokeratin, vimentin, cingulin, and n-cadherin but were negative for markers of endothelial, fibroblastic, smooth, and skeletal muscle cell lineages. in the present study, we show that addition of retin ... | 1995 | 7875372 |
| animal model analysis of genetic (co)variances for growth traits in japanese quail. | records of 1,530 japanese quail were used to estimate heritabilities and genetic correlations based on a derivative-free restricted maximum likelihood (reml) method with an animal model and anova. the animal model included fixed effects of hatch and sex, random effects of additive genetic value of the bird, and common environmental effect of the dam. heritabilities estimated from reml for body weights at hatch, 7, 14, 21, and 28 d of age were .38, .12, .31, .12, and .44, respectively. heritabili ... | 1994 | 7877938 |
| growth variability in avian embryos as a source of experimental error. | to reduce variability in an embryonic population to be used in experiments with electromagnetic fields, 820 japanese quail eggs (41 experiments, 20 eggs per experiment) were incubated to analyze different possible inputs of experimental variance. eggs came from a randombred progenitor population obtained from a poultry farm and selectively maintained. the results show that growth variability is significantly higher in some progenies, which show bimodal distributions; this is evidence of the exis ... | 2008 | 7881203 |
| insulin-like growth factor-i messenger rna content in the oviduct of japanese quail (coturnix coturnix japonica): changes during growth and development or after estrogen administration. | complementary dna (cdna) of insulin-like growth factor-i (igf-i) of japanese quail was cloned. the nucleotide sequence analysis of the cdna showed that only seven bases differed from those of chicken igf-i cdna in the 440 bases of the cloned region. this difference in nucleotide sequence did not cause changes in the amino acid sequence. using this cloned cdna, the changes in igf-i mrna content in the tissues of female quail during growth and development were investigated. in the oviduct, igf-i m ... | 1994 | 7881819 |
| new findings in the stumpy-limb mutation of japanese quail. | the stumpy-limb (sl) mutant (sl/sl) of japanese quail (coturnix japonica) is characterized by brachycephaly, parrot-like beaks with mild expressivity, and short and thick limbs. although this mutant had been believed to be completely embryonic lethal just before hatching, this study revealed that the sl mutant was partly viable when genetic background was altered. a total of 132 of 237 sl embryos (56%) hatched from the eggshell with no assistance; subsequently, 36 of the 132 sl chicks that hatch ... | 2003 | 7890930 |
| the effect of water loss upon the urate, urea and ammonia content of the egg of the japanese quail coturnix coturnix japonica. | 1. the urate, urea and ammonia content of the whole egg of the japanese quail was measured in late incubation in eggs subject to different rates of water loss. 2. high rates of water loss substantially increased egg urate content, but had little or no effect on urea or ammonia content. 3. allopurinol, an inhibitor of urate synthesis, reduced egg urate content to low levels, but produced no effect on urea content, and a small reduction in ammonia content. 4. the urea concentration of the embryo w ... | 1993 | 7902795 |
| dopaminergic interplexiform cells in the retina of pigmented and hypopigmented quails (coturnix coturnix japonica). | interplexiform cells (ipcs) have not been previously described as a component of the population of tyrosine hydroxylase (th) immunoreactive (presumably dopaminergic) cells in the avian retina. in this study, carried out in both pigmented and imperfect albino mutant quails (coturnix coturnix japonica), we initially describe th immunoreactive cells in the inner nuclear layer whose internal dendritic arborization extends into strata 1, 3 and 4/5 of the inner plexiform layer. then, we describe ascen ... | 1993 | 7903119 |
| retinal distribution of tyrosine hydroxylase immunoreactive cells in two strains of quails coturnix coturnix japonica. | we have compared the distribution of tyrosine-hydroxylase immunoreactive (th-i) somata in the retina of two strains of japanese quails, one normally pigmented and one hypopigmented mutant which develops a glaucoma, three months after their hatching. th-i cells were observed among amacrine and presumptive interplexiform cells in both strains. they were distributed in areas of decreasing densities from an area centralis, located in the central upper retina to the retinal periphery. we have arbitra ... | 1994 | 7914902 |
| comparison of circadian oscillation of melatonin release in pineal cells of house sparrow, pigeon and japanese quail, using cell perfusion systems. | we compared the circadian oscillation of melatonin release from cultured pineal cells in japanese quail, pigeon and house sparrow, to determine whether the pineal gland of these species retains the circadian oscillator function in vitro. after dissociated pineal cells have been cultured for 4 days under 12 h: 12 h light-dark (ld) cycle, they were perfused at a flow rate of 0.25 ml/h for 6-7 days under ld or constant darkness (dd). melatonin release increased during the dark period and low during ... | 1994 | 7922568 |
| stimulus control of copulatory behavior in sexually naive male japanese quail (coturnix japonica): effects of test context and stimulus movement. | sexually experienced male quail (coturnix japonica) are more likely to engage in copulatory behavior than sexually naive ones. these experiments suggest that sexual experience in a particular place may facilitate later copulatory responding because of increased familiarity with the contextual cues of the environment. male quail in experiment 1 did not copulate reliably with taxidermic models of females in a novel context, even though some of the subjects were allowed to copulate with female quai ... | 1994 | 7924255 |
| effect of day length on luteinizing hormone beta-subunit mrna and subsequent gonadal growth in the white-crowned sparrow, zonotrichia leucophrys gambelii. | we have applied a cdna probe for chicken luteinizing hormone beta-subunit to adenohypophysial preparations collected from gambell's white-crowned sparrows. in situ hybridization showed luteinizing hormone (lh) beta-subunit mrna distributed throughout the adenohypophysis in a manner identical to that of lh visualized by immunocytochemistry. northern blot analysis showed a single band (0.8 kbp) identical to that from japanese quail. dot blot analysis was used to quantify changes in lh beta-subunit ... | 1994 | 7926654 |
| the density of melatonin receptors is dependent upon the prevailing photoperiod in the japanese quail (coturnix japonica). | two groups of japanese quail (coturnix japonica) were exposed to two different photoperiods (short and long days: ld 8:16 and ld 16:8, respectively), and their brains examined for the presence and distribution of melatonin receptors by means of quantitative in vitro autoradiography. animals belonging to the ld 8:16 group expressed a significantly higher melatonin receptor density in the optic tectum and nucleus triangularis, while the ld 16:8 animals had a higher density of receptors in the hype ... | 1994 | 7936394 |
| changes in the frequency and size of smooth muscle tumors in japanese quail lines differing in body weight. | the purpose of this investigation was to study the incidence and size of smooth muscle tumors in several japanese quail lines and to report recent correlated changes in mature bw and egg production. laying females from lines selected solely (hw) or partly (hw-hp; hw-lp) for increased 4-wk bw or for decreased 4-wk bw (lw) and from the corresponding randombred control (r1) were used. lines hw-hp and hw-lp were sublines of line hw in which males were selected for increased 4-wk bw and females were ... | 1994 | 7937482 |
| fear of humans in japanese quail selected for low or high adrenocortical response. | behavioral reactions to a nearby human were recorded in male japanese quail of two lines selected for reduced (ls; low stress) or exaggerated (hs; high stress) plasma corticosterone (b) response to brief mechanical immobilization. their adrenocortical responses to one of three treatments were then examined. these were: no human disturbance (undisturbed controls, con), capture and return to the home cage before recapture and bleeding after 5 min (cr), or capture and manual restraint for 5 min bef ... | 1994 | 7938253 |
| centrifugal inputs enhance responses of retinal ganglion cells in the japanese quail without changing their spatial coding properties. | centrifugal fibers originating in the midbrain innervate the avian retina. stimulation of the centrifugal fibers enhances the responses of ganglion cells in the retinas of both chick and pigeon. the enhanced responses have been attributed to disinhibition, a reduction of the inhibitory surround component of the receptive fields of retinal ganglion cells. we found that stimulation of the centrifugal fibers in japanese quail enhances the responses of retinal ganglion cells to drifting sine-wave gr ... | 1994 | 7941415 |
| the integrative segment of the quail coturnix coturnix japonica. occurrence and distribution of carbonic anhydrase and complex carbohydrates. | as part of a more extensive study into the involvement of carbonic anhydrase in avian excretory function, the occurrence and distribution of this enzyme was investigated in the quail integrative segment. the integrative segment represents, in birds, that part of the intestinal tract where ureteral urine undergoes postrenal modification to form definitive urine. to define the structural peculiarities within the intestinal epithelium, the constituent parts, namely cloaca, rectum and caecum, as wel ... | 1994 | 7961146 |
| force and contractile characteristics after stretch overload in quail anterior latissimus dorsi muscle. | stretch overload has been shown to increase muscle mass by increasing fiber size and fiber number in the anterior latissimus dorsi (ald) of adult japanese quail. however, the functional significance of these changes is not known. the purpose of this study was to determine if stretch-induced hypertrophy alters function of the ald. a tube weight corresponding to 12% of the bird's body mass was added to one wing of 12 japanese quail for 30 days. this increased muscle mass corrected for the increase ... | 1994 | 7961225 |
| the circadian rhythm of thermoregulation in japanese quail. i. role of the eyes and pineal. | japanese quail exhibit a robust circadian rhythm in body temperature. this rhythm is readily entrainable by 24 h light-dark (ld) cycles and persists under constant conditions. because both the pineal organ and the eyes have been implicated as major components of the circadian system of birds, the role of these organs in generating the rhythm of body temperature was investigated. pinealectomy, when performed alone, had little effect on the body temperature rhythm of quail either under ld or under ... | 1994 | 7965924 |
| comparison of freeze-dried and extruded spirulina platensis as yolk pigmenting agents. | experiment 1 was an 8-wk study with japanese quail fed 0, .5, 1.0, 2.0, and 4.0% of freeze-dried spirulina or the dry equivalent of fresh spirulina extruded with corn. experiment 2 was a 16-wk repeat of experiment 1 using levels of 0, .25, .5, 1.0, and 2.0% spirulina. in the third experiment, corn, barley, and cassava were extruded with fresh spirulina equal to 1% of the dried product, and each feedstuff fed with 1% freeze-dried spirulina. four replicates of five quail were assigned to each trea ... | 1994 | 7971672 |
| the avian vitamin d receptors: primary structures and their origins. | cdna clones encoding japanese quail chorioallantoic membrane and chicken kidney 1,25-dihydroxyvitamin d3 receptors were isolated and the total 448-amino acid (aa) sequence was deduced. the sequences of the chicken and quail receptors are identical. the nucleotide and deduced amino acid sequences of the avian receptors are similar but not identical to the reported rat or human receptor sequences. there is a 78% similarity in the nucleotide sequences and 98.5% and 87.5% similarities in the amino a ... | 1994 | 7972109 |
| effect of reserpine pretreatment on avian erythrocyte carbonic anhydrase activation by isoproterenol. | we studied the action of beta-adrenergic agonists on japanese quail erythrocyte carbonic anhydrase (ca) in vitro. earlier we had reported that epinephrine increased ca activity by 14%; the present study focused on an attempt to increase the size of this response. washed erythrocytes from reserpine-treated (1 mg/kg daily i.m. for 3 days) and control birds were incubated for 40 min in the presence of isoproterenol 10(-6) mol/l. the activity of ca expressed as wilbur-anderson units/mg hemoglobin wa ... | 1994 | 7972320 |
| restraint, fear, and distress in japanese quail genetically selected for long or short tonic immobility reactions. | japanese quail genetically selected for long (lti) rather than short (sti) tonic immobility reactions showed more pronounced overt fear-responses in a number of putatively frightening situations. greater fear has also been found in japanese quail selected, in an independent program, for exaggerated (hs, high stress) rather than reduced (ls, low stress) plasma corticosterone response to brief mechanical restraint. the present study examined tonic immobility (ti) and adrenocortical responses in ma ... | 1994 | 7972404 |
| tartrate-resistant acid phosphatase accumulated in the matrix of developing medullary bone induced by estrogen treatment of male japanese quail. | tartrate-resistant acid phosphatase (trap) in medullary bone matrix and bone cells was histochemically examined employing estrogen-induced medullary bone of male japanese quail. within 2 days after estrogen administration, medullary bone matrix was identified and the matrix and osteoblasts were negative for trap activity. osteoclasts showing trap activity were occasionally seen. by 4 days, the projection of medullary bone trabeculae was seen and trap became positive in the deeper part of the bon ... | 1994 | 7976497 |
| morphometric analysis of the scleral bony ring with different numbers of ossicles in the eye of coturnix coturnix japonica. | the scleral bony ring (s.b.r.) of coturnix coturnix japonica was examined and evaluated morphometrically in its characteristic formations (scleral ossicles, overlapping sectors). the modal class 14-14, the most representative, was compared to others having minor or major numbers of ossicles with complex or simple overlaps in the left and right eyes. it was observed that the ossicles, numbered as in the literature, are ordered in a characteristic manner to form the s.b.r. the ossicle dimensions a ... | 1994 | 7978347 |
| differential effects of short photoperiod on 2-[125i]iodomelatonin binding in the testis and brain of quail. | the affinities and densities of 2-[125i]iodomelatonin binding sites in the brains and gonads of male japanese quail following short photoperiod treatment were studied. at 6 weeks old, control quail were placed under a 14 hour light/10 hour dark photo-stimulatory cycle and experimental quail were housed under a 7 hour light/17 hour dark photo-inhibitory lighting regime. eighteen weeks after photic manipulation, the birds were killed at mid-light. the photo-inhibited quail had very small testes. b ... | 2013 | 8004153 |
| effect of raised extracellular calcium on cell spread area in quail medullary bone osteoclasts. | the present study reports on the effects of extracellular calcium ([ca2+]o) elevation and ionomycin on cell spread area of medullary bone osteoclasts freshly isolated from egg-laying japanese quail. the responses were compared with those demonstrated in osteoclasts cultured for periods of 5-8 days and also to those previously demonstrated in neonatal rat osteoclasts. freshly isolated medullary bone osteoclasts, unlike rat osteoclasts, were refractory to 20 mm [ca2+]o, in that they showed no chan ... | 1994 | 8011313 |
| experimental borrelia garinii infection of japanese quail. | japanese quail inoculated subcutaneously with borrelia garinii responded to infection. b. garinii was reisolated mainly from skin and randomly from several organs between 7 and 56 days postinoculation. skin lesions were occasionally observed in association with spirochete recovery. all birds were positive for antibody at 53 to 56 days postinoculation. these results suggest that the japanese quail is a model for experimental infection with b. garinii and that birds are reservoirs for lyme disease ... | 1994 | 8039933 |
| contractile properties of aged avian muscle after stretch-overload. | the effects of ageing on muscle contractile adaptations to stretch-overload was examined in the anterior latissimus dorsi (ald) muscle of 12 old (90 weeks of age) and 12 young adult (10 weeks of age) japanese quails. a weight corresponding to 12% of the birds' body weight was attached to one wing for 30 days, while the contralateral wing served as the intra-animal control. in vitro contractile measurements were made at 25 degrees c by indirect stimulation of the ald by its nerve (pulse 0.2 ms). ... | 1994 | 8051957 |
| afferent and efferent connections of the sexually dimorphic medial preoptic nucleus of the male quail revealed by in vitro transport of dii. | the medial preoptic nucleus of the japanese quail is a testosterone-sensitive structure that is involved in the control of male copulatory behavior. the full understanding of the role played by this nucleus in the control of reproduction requires the identification of its afferent and efferent connections. in order to identify neural circuits involved in the control of the medial preoptic nucleus, we used the lipophilic fluorescent tracer dii implanted in aldheyde-fixed tissue. different strateg ... | 1994 | 8062340 |
| combined gonadal and photic influences on 2-[125i] iodomelatonin-binding level changes in some brain areas of the quail. | quantitative receptor autoradiography was used to study the binding of 2-[125i] iodomelatonin in the brain of the castrated and gonadally intact male japanese quail coturnix japonica exposed to both long- and short-day photoperiod cycles. the distribution study displayed that these conditions were responsible for a heterogeneous binding pattern as shown by elevated receptor levels being located in visual brain centers, such as the stratum opticum, nucleus pretectalis, and nucleus geniculatus lat ... | 1994 | 8064260 |
| 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 |
| experimental toxoplasmosis in japanese quail. | twenty-four 5-month-old battery-hatched japanese quail were inoculated orally with 10(5) (me 49 strain, group a, 6 birds), 10(3) (me 49 strain, group b, 6 birds), 10(5) (gt-1 strain, group c, 6 birds), and 10(3) (gt-1 strain, group d, 6 birds) toxoplasma gondii oocysts. all birds in group c died or were euthanized within 8 days after inoculation (dai). five of the 6 birds in group d died or were euthanized 8, 9, 15, 19, and 23 dai. one of the 6 quail in group a died 9 dai, and 1 of the 6 birds i ... | 1994 | 8068754 |
| 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 |
| host specificity studies and oocyst description of a cryptosporidium sp. isolated from ostriches. | oocysts of a cryptosporidium sp. were found in the feces of 14 of 165 (8.5%) ostriches imported into canada. the genus identity of the oocysts was confirmed by morphology. the mean (+/- sd) size of 40 oocysts was 4.6 (0.53) x 4.0 (0.42) microns (range 3.9-6.1 x 3.3-5.0 microns) with a shape index (length/width ratio) of 1.15 (range 1.00-1.38). in cross-transmission experiments, this cryptosporidium sp. failed to infect suckling mice, chickens, turkeys, or quail (coturnix coturnix japonica). a co ... | 1994 | 8073019 |
| infectivity of toxocara canis larvae from japanese quails in mice. | two hundred toxocara canis larvae derived from japanese quail liver were given orally to each of 50 8-week-old ddy mice and parasitism of the larvae was examined during 6 hr and 120 days after inoculation. although there were no clinical signs in infected mice, larvae were recovered from the liver (21.5 +/- 16.3 larvae), lung (5.1 +/- 6.0 larvae), kidney (0.7 +/- 1.1 larvae), small intestine (1.0 +/- 2.0 larvae), mesentery (1.6 +/- 3.1 larvae), and brain (7.8 +/- 6.8 larvae). | 1994 | 8075236 |
| gonadal-gabaergic interaction is an important factor involved in photoperiod-induced 2-[125i] iodomelatonin binding changes in the japanese quail brain. | the type of mechanism(s) by which melatonin alone and/or through the intervention of other putative neurotransmitters is able to control circadian rhythms remains unresolved. comparison of 2-[125i]iodomelatonin binding pattern in the brain of castrated and gonadally intact japanese quail (coturnix japonica), using quantitative receptor autoradiography, displayed that the combination of the intact gonadal condition and a long-day (16l:8d) photostimulatory schedule is responsible for major binding ... | 1994 | 8082036 |
| tissue-specific expression of mouse tyrosinase gene in cultured chicken cells. | a mouse tyrosinase cdna has been combined with different promoters and inserted into several replication-competent avian leukosis proviruses and the viruses were transferred into cultured albino chick cells by viral infection. expression of the tyrosinase gene depended on one of four promoter sequences: the resident constitutive promoter (rous sarcoma virus long-terminal repeat; rsv-ltr), 471 bp from the mouse tyrosinase gene-associated promoter, 519 bp from the japanese quail tyrosinase gene as ... | 1994 | 8082718 |
| solution structure of reactive-site hydrolyzed turkey ovomucoid third domain by nuclear magnetic resonance and distance geometry methods. | the solution structure of reactive-site hydrolyzed turkey ovomucoid third domain (omtky3*) was determined by n.m.r. methods. a total of 655 distance constraints was applied in a distance geometry/simulated annealing approach to calculate a family of structures consistent with the n.m.r. data. the input data included 24 torsion angle constraints, 14 hydrogen bonds, 611 constraints derived from two-dimensional nuclear overhauser enhancement spectroscopy data, and three disulfide bridges. stereospe ... | 1994 | 8089843 |
| daily rhythm of plasma insulin in japanese quail (coturnix c. japonica) fed ad libitum. | 1. plasma levels of immuno-reactive insulin (iri) of 6 groups of 5-week-old quail, held on a 16l:8d photoregime, were measured every 4 hr, for 24 hr. 2. concentrations of plasma iri varied during the 24 hr period (anova, p < 0.003). insulin levels were high (mean = 857 pg/ml) from 6 a.m. (light onset) until 6 p.m. (4 hr before light offset) and low (mean = 185 pg/ml) at 10 p.m. and 2 a.m. 3. iri concentrations at 6 a.m., 10 a.m., 2 p.m. and 6 p.m. were significantly different from values at 2 a. ... | 1993 | 8094654 |
| the catecholaminergic system of the quail brain: immunocytochemical studies of dopamine beta-hydroxylase and tyrosine hydroxylase. | the distribution of dopamine beta-hydroxylase and tyrosine hydroxylase, two key enzymes in the biosynthesis of catecholamines, was investigated by immunocytochemistry in the brain of male and female japanese quail. cells or fibers showing dopamine beta-hydroxylase and tyrosine hydroxylase immunoreactivity were considered to be noradrenergic or adrenergic, while all structures showing only tyrosine hydroxylase immunoreactivity were tentatively considered to be dopaminergic. the major dopaminergic ... | 1993 | 8095939 |
| the effect of different levels of dietary lysine on growth and development of a random-bred population of japanese quail (r1) and a subline of r1 selected for increased body weight (hw). | 1. in two experiments, the dietary lysine concentration which supported maximal gain through 14 days of age in a subline of japanese quail selected for 4-week body weight (hw) was higher than that needed by the random-bred population (r1) from which it was initially developed. 2. the lysine concentrations needed to minimize feather depigmentation and maximize breast and leg muscle development were higher in hw quail than in r1 quail. | 1993 | 8099870 |
| effects of exogenous melatonin on some endocrine, behavioural and metabolic parameters in japanese quail coturnix coturnix japonica. | 1. melatonin administration in drinking water (5 micrograms/ml) to japanese quail resulted in a 20-fold increase of plasma melatonin levels in comparison with the control, day time concentration (0.34 +/- 0.05 vs 6.88 +/- 1.10 nmol/l). 2. plasma triiodothyronine levels increased (5.8 +/- 0.93 vs 7.97 +/- 0.64 nmol/l), corticosterone decreased (28.04 +/- 3.42 vs 15.96 +/- 2.56 nmol/l) and no significant changes were recorded in thyroxine concentration after the treatment. 3. a higher occurrence o ... | 1993 | 8101160 |
| effect of acth and glucocorticoids on lipid metabolism in the japanese quail, coturnix coturnix japonica. | 1. immature male japanese quail received repeated (chronic) injections of 0.8 i.u. corticotrophin (acth), 0.1 mg or 1.0 mg corticosterone (b), or 0.02 mg dexamethasone (dxm) and were fasted then refed at the end of the treatment period. a subgroup of the dxm group were given a single (acute) injection of 0.8 i.u. acth or saline before refeeding. a further group that had been given repeated injections of saline were fasted at the end of the treatment period. 2. all chronic hormone treatments decr ... | 1993 | 8102958 |
| effects of bilateral hemispherectomy on genetically variable stimulus preferences and imprinting in quail chicks. | bilateral ablation of the telencephalon on the 1st posthatch day prevented learning from imprinting to colored stimuli in japanese quail chicks c. coturnix japonica, but it spared their artificially selected approach preferences for particular colors and patterns. post-imprinting decerebration on the 3rd posthatch day erased the imprinted memory, but did not revert the chicks' approach choices to the colors of their genetically distinct initial preferences. the genetically determined and the acq ... | 1993 | 8111622 |
| [the effect of butylhydroxyanisole, an antioxidant, on experimental atherosclerosis in japanese quail]. | the present paper aimed to examine a possible influence of the antioxidant butylhydroxyanisole (bha) on the extent of atherosclerotic changes in coronary arterioles, in arcus aortae, and on the influencing of the extent of myocardial necroses. the model of atherosclerosis was worked out by administering 1% cholesterol diet to japanese quails for the period of 40 days. the above-mentioned changes were examined on histological preparations and they were evaluated morphometrically. quantification a ... | 1993 | 8111863 |
| effects of apomorphine on sexual behavior in male quail. | in the rat, dopamine (da) facilitates male copulatory behavior. indirect evidence based largely on neuroanatomical data suggest that in quail da is also implicated in the control of male reproductive behavior but there is no pharmacological evidence to support this conclusion. to test this idea, castrated testosterone (t)-treated male quail were injected with various doses of the dopaminergic agonist apomorphine (apo) in the range 1-10,000 micrograms/kg. the sexual behavior of birds was recorded ... | 1994 | 8115432 |
| ultrastructural study of post-hatching development in the pineal gland of the japanese quail. | the pineal gland of the japanese quail (coturnix coturnix japonica) retained numerous follicular structures, each of which was composed mostly of pinealocytes and supporting cells radially arranged around the follicular lumen during the first 6 weeks of age. in the pinealocytes, paraboloids and regular stacks of lamellar disks, which were demonstrated at 1 day of age in a previous study [14], rapidly decreased in number after 1 week of age. from 1 to 6 weeks of age, the pinealocytes had more dev ... | 1993 | 8117821 |
| orange: a plumage color mutation accompanied by semi-lethality in japanese quail. | a new plumage color mutant, orange, in japanese quail (coturnix japonica) was characterized by the same plumage pattern as in the wild type but with diluted pigmentation on the whole body. light reddish-brown and light black are predominant instead of heavy brown and heavy black in the wild type. although the eye color of the adult orange mutant was somewhat similar to that of the wild type, it showed a reddish color when held to the light. fertility of the orange mutant was normal (97.8%), but ... | 1994 | 8120359 |
| effects of first formant onset frequency on [-voice] judgments result from auditory processes not specific to humans. | when f1-onset frequency is lower, longer f1 cut-back (vot) is required for human listeners to perceive synthesized stop consonants as voiceless. k. r. kluender [j. acoust. soc. am. 90, 83-96 (1991)] found comparable effects of f1-onset frequency on the "labeling" of stop consonants by japanese quail (coturnix coturnix japonica) trained to distinguish stop consonants varying in f1 cut-back. in that study, cvs were synthesized with natural-like rising f1 transitions, and endpoint training stimuli ... | 1994 | 8132898 |
| experimental modification of vitellogenesis in japanese quail by trypan blue in vivo. | ovaries of adult japanese quails were exposed in vivo to the acid bisazo dye trypan blue (tb) which binds to plasma albumin, the plasma precursor of the yolk protein alpha-livetin. by a combination of fluorescence microscopy and electron microscopy alpha-livetin could be localized in the subdroplets of intermediary and yellow yolk spheres. trypan blue alters vitellogenesis in the non-disc region of follicles in rapid growth in a reversible and dose-dependent way. less yolk is produced over 24 h ... | 1993 | 8142041 |
| antioxidant status of japanese quail: comparison of atherosclerosis-susceptible and -resistant strains. | to compare levels of antioxidant components of blood and aortic tissue from two strains of japanese quail showing high and low susceptibilities to atherosclerosis and receiving either control or cholesterol-enriched diets. | 1994 | 8143223 |
| [anesthesia in poultry]. | ketamine and ketamine-xylazine anesthesia was performed in the domestic fowl of the laying hybrid hisex brown and in japanese quail (coturnix coturnix) to test short-time anesthesia for the purposes of small surgical interventions. the findings of the authors heidenreich and wissdorf (1978) obtained in birds in the zoo park in hannover were used to determine anesthetic doses and to assess the course of anesthesia, as well as a comparative study written by samour et al. (1984) dealing with the us ... | 1994 | 8154090 |
| the effects of sex steroid hormones on the pigment accumulation in the shell gland of japanese quail. | effects of sex steroid hormones on the accumulation of the superficial pigment of the eggshell in the quail shell gland were investigated. in experiment 1, 10 or 20 mg/100 g bw of aminoglutethimide (ag) was injected s.c. into laying quail hens 10 h before the expected ovulation. thirty percent of the hens that received 10 mg/100 g bw and 87% of the hens that received 20 mg/100 g bw failed to ovulate. they had significantly (p < .01) lower concentrations of preovulatory plasma progesterone (p) th ... | 1994 | 8165162 |
| different expression of calpain in skeletal muscle of japanese quail (coturnix coturnix japonica) lines selected for body weight. | calpain activity was determined by western blot analysis of steady-state concentrations of m-calpain (calpain requiring millimolar ca2+ for activation) and also by northern blot analysis of steady-state concentrations of mrna encoding m-calpain in three lines of quail: a random-bred control line (rr) and two lines selected for body weight, one for increased body weight (ll) and another for decreased body weight (ss). the m-calpain activities in skeletal muscle were higher in the ss line and lowe ... | 1993 | 8166622 |
| visual pigments in the pineal complex of the japanese quail, japanese grass lizard and bullfrog: immunocytochemistry and hplc analysis. | we investigated localization of visual pigments in the pineal complex of japanese quail, japanese grass lizards and bullfrogs immunocytochemically by use of the antiserum against bovine rhodopsin (rh-as) and monoclonal antibodies against chicken iodopsin (io-mab). we also analyzed retinoids, chromophores of visual pigments, by a high performance liquid chromatography (hplc). the outer segments and cell membranes of some photoreceptor cells in the pineal organ of the japanese quail exhibited immu ... | 1994 | 8171418 |
| acrylamide-induced neurotoxicity in the central nervous system of japanese quails. comparative studies of normal and neurofilament-deficient quails. | acrylamide (ac) neurotoxicity in the central nervous system (cns) in normal and neurofilament (nf)-deficient mutant (quv) japanese quails was investigated. acrylamide (100 mg/kg) was injected intraperitoneally every other day. after the birds manifested neurological signs, they were necropsied (after 10-30 ac injections) and examined morphologically. all of the ac-intoxicated normal quails showed distal, retrograde nerve fiber degeneration associated with neurofilamentous axonal swellings in the ... | 1994 | 8176411 |
| a comparison of [125i]iodomelatonin binding sites in testes and brains of heavy meat-type japanese quail with a randombred strain. | 2013 | 8182279 | |
| [the effect of weightlessness on embryonic development of striated muscles in japanese quail]. | in the conditions of gravitationless state, the development of skeletal muscles and myocardium was identical in experimental, synchronous and laboratory control. there were not larger differences between the investigated groups of animals. myofibrils were in the stage of myofibrillogenesis. they were mostly disarrayed, but they already formed sarcomeres, without marked boundaries between i and a zones. sarcoplasm contained large amounts of ribosomes and polyribosomes. mitochondria were intensive ... | 1994 | 8184522 |
| toxic effects of cyclophosphamide and methylnitrosourea in japanese quail embryos depend on the route of administration. | we studied the toxic effects of cyclophosphamide and methyl-n-nitrosourea in cultured quail embryos when injected into the albumen and the subembryonic liquid, respectively. the data indicate that both agents display a greater toxicity when given into the subembryonic liquid instead of the albumen. this differential toxicity was demonstrated by means of the survival rate, developmental parameters like growth rate and developmental stages, and excreted nucleosides and uric acid. it is reasonable ... | 2013 | 8186625 |
| sex difference in the neurotensin-immunoreactive cell populations of the preoptic area in quail (coturnix japonica). | the distribution of neurotensin-immunoreactive cells and fibers was analyzed by immunocytochemistry in the forebrain of male and female japanese quail (coturnix japonica) by using an antibody directed against the c-terminal part of the molecule. immunoreactive perikarya were located almost exclusively in the medial preoptic area with small populations also being present in the nucleus paraventricularis and in the tuberal region. immunoreactive fibers were observed not only throughout the preopti ... | 1994 | 8187169 |
| topography of sexually conditioned behavior in male japanese quail (coturnix japonica) depends on the cs-us interval. | the interval between exposure to a conditioned stimulus (cs) to male quail and access to a female (the unconditioned stimulus [us]) was varied from 0.5 to 20 min using a pavlovian delayed conditioning procedure. increasing the cs-us interval altered the spatial distribution of sexual conditioned behavior. with a short cs-us interval (1 min), conditioning resulted in the ss remaining close to the cs and increasing their locomotor behavior near the cs. with a long cs-us interval (20 min), the ss a ... | 1994 | 8189188 |
| type ii collagen distribution during cranial development in xenopus laevis. | epithelially expressed type ii collagen is thought to play a prominent role in the embryonic patterning and differentiation of the vertebrate skull, primarily on the basis of data derived from amniotes. we describe the spatiotemporal distribution of type ii collagen in the embryonic head of the african clawed frog, xenopus laevis, using whole-mount and serial-section immunohistochemical analysis. we studied embryos spanning nieuwkoop and faber (1967) stages 21-39, a period including cranial neur ... | 1994 | 8192239 |
| comparison of energy metabolism during the growing period in quail lines selected for body weight. | 1. the present study was conducted to compare body weight, daily weight gain, relative growth rate, food intake, food conversion efficiency, abdominal fat weight, thyroid weight, plasma t4 concentration, body temperature, oxygen consumption, carbon dioxide production and heat production among three japanese-quail lines selected for body weight: a random bred line (rr) and lines for large (ll) or small (ss) body weight. 2. t4 concentration increased in the order ss, rr, ll in both sexes and did n ... | 1994 | 8199883 |
| atherosclerotic lesion development in hypercholesterolemic japanese quail following probucol treatment: a biochemical and morphologic evaluation. | probucol, a cholesterol-lowering agent which possesses antioxidant properties, was evaluated in hypercholesterolemic japanese quail in order to assess the significance of antioxidant therapy on the development of atherosclerosis. forty quail were fed a 0.5% cholesterol diet containing 0, 100, 200 or 500 mg kg-1 probucol for 2 months. at necropsy, plasma total and lipoprotein cholesterol and lipoprotein distribution were unchanged despite plasma probucol levels of 50 to 59 micrograms ml-1. the ch ... | 2015 | 8202444 |
| topographical distribution of reduced nicotinamide adenine dinucleotide phosphate-diaphorase in the brain of the japanese quail. | the distribution of reduced nicotinamide adenine dinucleotide phosphate (nadph)-diaphorase activity was histochemically investigated in the japanese quail brain. this enzyme is now considered responsible for the synthesis of nitric oxide, a novel neural messenger whose distribution has not been described in the avian brain until now. the histochemical technique provides a simple and reliable method for staining selected populations of neurons throughout the avian brain. in the telencephalon seve ... | 1994 | 8207130 |
| smaller number of large myelinated fibers and focal myelin thickening in mutant quails deficient in neurofilaments. | the peripheral nervous system of a mutant of a japanese quail deficient in neurofilaments (mutant) and of a normal japanese quail (control) was morphometrically evaluated to characterize the morphological findings, especially those of the myelinated fibers of the mutant. in the proximal peroneal nerves, the frequency of the teased myelinated fibers showing the focal myelin thickening was higher in mutant than in control (p < 0.001) without obvious ongoing axonal degeneration and segmental demyel ... | 1993 | 8213082 |
| basic and lectin histochemistry for studying glycoconjugates in the lingual salivary glands of the japanese quail (coturnix coturnix japonica). | traditional non-lectin staining methods and lectin histochemistry combined with specific exoglycosidase digestion were used to investigate the histological structure of these glands and to visualize the occurrence and composition of salivary glycoconjugates. the quail lingual glands comprise the anterior lingual gland, with rostral and caudal portions that differ in morphology and histochemical staining, and the posterior lingual gland devoid of regional differences. carbohydrate histochemistry ... | 1993 | 8215987 |
| low temperature and short days together induce thyroid activation and suppression of lh release in japanese quail. | we have found in japanese quail that low ambient temperature is required to terminate breeding activity in the presence of short days (wada et al., 1990, gen. comp. endocrinol. 80, 465-472; tsuyoshi and wada, 1992, gen. comp. endocrinol. 85, 424-429). to elucidate the mechanism for photoperiodic and temperature regulation of the release of luteinizing hormone (lh), several serum variables were measured in three groups of mature male birds: (a) birds kept on long days of 16l:8d, 24 hr at 19 degre ... | 1993 | 8224762 |
| celadon: an eggshell color mutation in japanese quail. | a new eggshell color mutant was discovered in the japanese quail. this trait was named "celadon" and was shown to be controlled by an autosomal recessive gene. therefore, the gene symbol ce was proposed. this gene and an autosomal recessive gene we controlling a white eggshell trait were shown to be nonallelic. also, ce was shown to be hypostatic to we. a spectrophotometric analysis revealed that the celadon eggshell pigments are protoporphyrin and biliverdin as in the wild-type eggshell, but th ... | 2006 | 8228165 |
| light down--dominant plumage color mutation with homozygous lethality in japanese quail. | a new plumage color mutation in japanese quail (coturnix japonica) was named light down (ld) from its external appearance at hatching; it was expressed as an incompletely dominant autosomal gene, for which the symbol l is proposed. in the heterozygous neonates, black stripes on the head and back were narrow and yellowish stripes were wide, creating a lighter external appearance than that of the wild type. one-third of the homozygotes, which had creamy down plumules all over the body, died before ... | 2006 | 8228174 |
| allelism of panda and dotted white plumage genes in japanese quail. | panda and dotted white mutant plumage colors of japanese quail (coturnix japonica) were found to be controlled by the autosomal alleles. both mutants showed white plumage with colored spots or patches, but they were easily distinguishable by size and location of the colored areas and the color and markings of the pigmented feathers. at hatching also they were easily distinguishable by the position, size, and colors of the spots or patches. the panda chicks possessed large blackish patches on the ... | 2006 | 8228175 |
| sensory nerve endings in the beak skin of japanese quail. | this study is concerned with the distribution and ultrastructure of sensory nerve endings in the beak skin of adult japanese quail (coturnix coturnix japonica). the following nerve endings were found: free nerve endings, clusters of dermal merkel nerve endings, herbst corpuscles and ruffini corpuscles. the latter were found only in the dermis of the tip of the upper beak. the remaining endings were present in the skin of all areas of upper and lower beak. free nerve endings were supplied by eith ... | 1993 | 8238960 |
| sources of behavioral deviation modeled by early color preferences in quail. iii. developmental stability and normative canalization. | successful artificial selection of quail (c. coturnix japonica) for divergent early approach preferences for, and imprintabilities to, the wavelength characteristics of otherwise identical visual stimuli decreased the trait's developmental stability. the developmental error that resulted from selecting for extreme initial preferences was associated with enhanced imprintabilities. conversely, the developmental error that resulted from selecting for extreme imprintabilities was associated with enh ... | 1993 | 8240216 |
| induction of normal cardiovascular development in the vitamin a-deprived quail embryo by natural retinoids. | the biological activity of various natural retinoids and the time "window" when vitamin a activity is required for normal cardiovascular development were examined in vitamin a-deprived japanese quail embryos. the administration of 1 microgram of retinol at the beginning of incubation resulted in normal cardiovascular development in 97% of embryos; retinoic acid was toxic at this dose level. treatment of embryos with 0.1 microgram of all-trans-retinol or 13-cis-retinoic acid at the beginning of i ... | 1993 | 8253275 |
| structures of asparagine linked oligosaccharides of immunoglobulins (igy) isolated from egg-yolk of japanese quail. | structures of the asn linked oligosaccharides of quail egg-yolk immunoglobulin (igy) were determined in this study. asn linked oligosaccharides were cleaved from igy by hydrazinolysis and labelled with p-aminobenzoic acid ethyl ester (abee) after n-acetylation. the abee labelled oligosaccharides were then fractionated by a combination of concanavalin a-agarose column chromatography and anion exchange, normal phase and reversed phase hplc before their structures were determined by sequential exog ... | 1993 | 8257848 |
| divergent selection for body weight and yolk precursor in coturnix coturnix japonica. 9. evaluation of traits associated with onset of sexual maturity. | an experiment was conducted to compare traits associated with onset of sexual maturity in japanese quail lines. lines divergently selected for high and low 4-wk bw (hw and lw), and high and low total plasma phosphorus at beginning of lay (hp and lp) were compared with a randombred line (rbc1) that served as the base population for hw, lw, hp, and lp. the hw sublines (hw-hp and hw-lp) and lp subline (lp-hw) were also compared to their respective line of origin. most of the differences observed fo ... | 1993 | 8265491 |
| effect of dietary protein and selected antioxidants on fatty liver hemorrhagic syndrome induced in japanese quail. | the effects of cp and antioxidants on fatty liver hemorrhagic syndrome (flhs) in japanese quail hens were studied. in experiment 1, four treatments were arranged as a 2 x 2 factorial; dietary cp (18 or 24%) and reduced glutathione (gsh, 0 or 120 mg/kg diet) were the major variables, but cysteine and other amino acids were higher in the 24% cp diets. negative control (nc1) and positive control (pc1) diets were also evaluated. in experiment 2, the effects of vitamin e (ve) and gsh were evaluated i ... | 1993 | 8265498 |
| melatonin and photoperiodic time measurement in japanese quail (coturnix coturnix japonica). | artificial extension of the duration of nocturnally secreted circulating melatonin with exogenous injections produces a short day effect in the reproductive status of mammals, and this paradigm has been applied to japanese quail to test the hypothesis that birds are similar to mammals in this respect. male quail reared on non-stimulatory short days (8l:16d) were switched to mildly stimulatory 12l:12d and given daily melatonin injections at dusk (10 micrograms 2 h before dusk and 10 micrograms at ... | 1993 | 8265672 |
| experimental light damage increases lipofuscin in the retinal pigment epithelium of japanese quail (coturnix coturnix japonica). | lipofuscin accumulation in the retinal pigment epithelium (rpe) of japanese quail was investigated in normal and light-damaged animals at 4 months and 12 months of age following a single, 18-hr light-damaging exposure (3000-3200 lx) evaluated 6 weeks postexposure. quail in a second experimental group light-damaged at 4 months of age were exposed to a second, identical light-damaging exposure at 12 months of age. rpe lipofuscin was quantitatively assessed in three ways: (1) total lipofuscin, expr ... | 1993 | 8282031 |
| anf binding sites in the heart of the quail (coturnix coturnix japonica). | the distribution pattern of rat [125i]-atrial natriuretic factor (anf) binding sites in the cardiac regions of the japanese quail was examined by in vitro quantitative autoradiography. elevated anf binding densities (519 +/- 121 fmol/mg protein) were found in the posterior vena cava, while lower binding levels (between 40 and 50 fmol/mg protein) were found in sinus venosus, aortic bulb, and endomural vessels, with the ventricular wall having the lowest value (17.6 +/- 8.8 fmol/mg protein). scatc ... | 1993 | 8284267 |
| fine structure of merkel corpuscles in the lingual mucosa of japanese quail, coturnix coturnix japonica. | by electron microscopy, these corpuscles were found exclusively in the connective tissue just beneath the dorsal epithelium near the lateral margin of the tongue. each consisted of 4-8 merkel cells and flattened nerve terminals arranged alternately. the merkel cell was characterized by dense-cored granules, with a diameter ranging from 120 to 180 nm, throughout the cytoplasm. the functional significance of the avian merkel cell, i.e. a mechanoreceptor cell or a trophic cell with the axon, still ... | 1993 | 8297254 |
| spermiogenesis and spermiation in the japanese quail (coturnix coturnix japonica). | the ultrastructure of 12 steps of spermatid development and the process of spermiation are described for the japanese quail in order to clarify the classification proposed for determining the stages of the cycle of the seminiferous epithelium (lin et al. 1990) and to assess disagreements in the literature about sperm development in birds. it was concluded that acrosomal development involves the formation of proacrosomal granules which do not contain dense granules like the mammalian acrosome. ma ... | 1993 | 8300429 |
| multiphasic analysis of egg production in japanese quail. | a multiphasic function that considers egg production of individual hens to result from more than one phase was used to describe egg production for japanese quail. each phase is determined by number of eggs within a clutch, including internally laid eggs, and pause between clutches. cumulative egg production was fitted by using a function (koops and grossman, 1992) expressing time in terms of cumulative egg number. data from nine hens over a 31-day period were analyzed to estimate parameters for ... | 1993 | 8309867 |
| beta,beta'-iminodipropionitrile toxicity in normal and congenitally neurofilament-deficient japanese quails. | morphological effects of a neurotoxin, beta,beta'-iminodipropionitrile (idpn) were analyzed in normal and congenitally neurofilament (nf)-deficient japanese quails. these quails (6 weeks old) were injected intraperitoneally with idpn (0.2 g/kg body weight) three times every 3 days. they were necropsied at 10 to 12 days after the first injection. in normal quails, axonal swellings were observed histologically in the ventral motoneurons, ventral root, commissura grisea and spinal ganglion in the c ... | 1993 | 8310813 |
| hematology and serum biochemistry of japanese quail fed dietary tri-n-butyltin oxide during reproduction. | during a subchronic toxicity and reproduction study with tri-n-butyltin oxide (tbto) concentrations of 0, 24, 60, and 150 mg/kg diet in japanese quail, preliminary data on hematology and serum biochemistry were obtained. the absence of serious effects in blood parameters in both adult quail and developing chicks are discussed in view of the adverse effects of tbto on reproduction. | 1994 | 8311513 |
| carcass composition, feed intake, and feed efficiency following long-term selection for four-week body weight in japanese quail. | a study was conducted to determine bw, feed intake, feed efficiency, and carcass composition changes following 51 generations of selection for high 4-wk bw in japanese quail. quail lines utilized were the p line selected for high 4-wk bw on a normal 28% cp diet and the unselected base population (c line) from which the p line originated. body weight, feed intake, and feed efficiency data were collected daily from 1 to 28 days, whereas percentage carcass water, ash, protein, and total lipid data ... | 1993 | 8321810 |
| the influence of dietary protein level on body weight of japanese quail lines selected under high- and low-protein diets. | two experiments were conducted to determine the protein requirement of quail lines (p and t) following selection for increased 4-wk bw under normal-protein (28% cp) and low-protein (20% cp) diets, respectively. quail progeny from generation 39 breeders were fed diets containing 18, 21, 24, and 27% cp from 0 to 5 wk of age in experiment 1, whereas in experiment 2, quail progeny from generation 79 breeders were fed diets containing 18, 21, 24, 27, and 30% cp from 0 to 4 wk of age. quail from the u ... | 1993 | 8321811 |
| short-latency stressor effects on tonic immobility fear reactions of japanese quail divergently selected for adrenocortical responsiveness to immobilization. | despite evidence for a positive association between adrenocortical activation and fearfulness, the effects of chronic (12 to 20 h) exposure to stressful stimulation on the fear reactions of japanese quail genetically selected for high (hs) or low (ls) plasma corticosterone response to immobilization stress are not straightforward. the present study examined tonic immobility fear responses in quail of both lines that, immediately prior to testing, either had been allowed to remain undisturbed or ... | 1993 | 8321818 |
| effects of crf on isolated japanese quails selected for fearfulness and for sociality. | the effects of crf on the behavior and plasma corticosterone levels of isolated japanese quail chicks were determined. doses of 15, 30, and 45 micrograms/kg of crf reduced the number of distress vocalizations emitted during isolation in chicks of a control line. the behavioral responses to a 15 micrograms/kg dose of crf in lines selected either for high (hsr) or low (lsr) level of sociality or for low (sti) or high (lti) fearfulness were compared. crf suppressed vocalizations and increased the n ... | 1993 | 8327589 |
| somite pattern regulation in the avian segmental plate mesoderm. | previous experimental evidence suggested that the avian segmental pattern is already specified in the apparently unsegmented paraxial (segmental plate) mesoderm, but is susceptible to modification and reconstitution. we explored capacities of embryos to alter the specified pattern and restore it after disruption. in control experiments, right segmental plates of chicken or japanese quail embryos were removed after about 48 hours of incubation and immediately replaced. hensen's node and the primi ... | 1993 | 8330540 |