| oxygen affinity of duck blood determined by in vivo and in vitro technique. | half saturation partial pressure of o2,p50, was determined in domestic muscovy ducks (cairina moschata) both by in vivo and in vitro techniques. for in vivo determination, blood samples were drawn from the anesthetized, artificially ventilated animals and analyzed both for o2 content, co2, and o2 partial pressure, po2. o2 capacity was detemined in arterial samples during hyperoxic ventilation (arterial po2 about 180 torr). p50 was calculated from measurements in venous blood samples (o2 saturati ... | 1977 | 18767 |
| [problem of the infertility of hybrids of the muscovy (cairina moschata l.) and the domestic duck (anas platyrhynchos domestica)]. | analysis of blood serum proteins electrophoretic spectra for perching and domestic ducks resulted in revealing interspecific differences of prealbumin and transferrin types showing incomplete identity of loci in analogous sites of some homologous chromosomes in the hybridizants. this confirms the genetic nature of sterility in this crossing combination hybrids whose blood serum proteins electrophoretic spectrum displays a complex hybrid phenotype. | 1977 | 70093 |
| [immunological study of gonadotropic and prolactin cells in adenohypophysis of the barbary duck (cairina moschata l.)]. | in both lobes of the pars distalis of the barbary duck the basophile, alcian-blue positive and pas negative cells no affected by thyroxine treatment are revealed by anti-hcg-immunserum; they are certainly gonadotropic cells previously named delta-cells in the pekin duck. in the cephalic lobe only one type of pas positive cells, is revealed by antiprolactin antiserum; they are abundant and very active in the broody duck. | 1975 | 126762 |
| [cyto-immunological study of the anterior pituitary somatotropin cells of male and female adult peking, barbary and hybrid (from crossing male peking x female barbary) ducks and of male ducklings of the 3 races)]. | the anti-human-sth immunserum applied on hypophysis sections of adults males and females peking (anas platyrhynchos l.) barbary (cairina moschata l.) and hybrid (from the mating male peking x female barbary) ducks, marks orangeophils, oval- or round shaped, pas negative cells exclusively localized in the caudal lobe of the pars distalis. in the males ducklings of the three races this immunserum reveals numerous and partially exhausted cells. the authors conclude that the acidophils alpha cells o ... | 1976 | 134787 |
| [ultrastructure of 3 beta hsdh (delta 5-3 beta hydroxysteroid dehydrogenase)-containing cells in ducks. iii. hybrid ducks (anas platyrhynchos male x cairina moschata female) during egg laying]. | all the cells of the ovary of the hybrid duck (peking duck x barbary duck) which contain an active 3 beta hsdh enzyme show ultrastructural characteristics of steroid cells: a smooth, developed reticulum, tubularcrested mitochondria, a considerable "charge" in lipid inclusion. these cells are found not only in the internal theca of follicles as with the female gender, but also in the cortical zones void of germinal elements, a tendancy particular to the female. | 1976 | 139997 |
| [the germinal population at embryonic stage and young age in the female hybrid duck born of male pekin x female barbary crossing. comparison with ducks of the parent species]. | as hatching the number of left ovary germinal cells of the female hybrid (anas platyrhynchos x cairina moschata) is weaker than that of the peking and barbary females because the small size of the genital crest limites the number of colonising germinal cells. as well after 16 days of incubation the multiplication of the oogonies stops in a way that we can not explain. the later growth of the ovarian follicle is, however, very fast, and the first laying is earlier than with the female parents. | 1977 | 142551 |
| [ultrastructure of the granulosa cells of the ovarian follicle of ducks (barbary duck: cairina moschata, pekin duck: anas platyrhynchos]. | in the granulosa cells of the ovarian follicle of the ducks, the golgi apparatus is developed, the granular endoplasmic reticulum is important. owing to these characters, these cells are probably oriented towards the elaboration of proteins. the seasonal variations of the aspect of these cells are important: in january all organits are not very developed when in may they are all very developed. for a determined season all cells present the same aspect. | 1977 | 145304 |
| [autoradiography and tritiated thymidine labeling during spermatogenesis of the barbary duck (cairina moschata l.)]. | using autoradiographic method (intraveinous of 1 mci-3h thymidine/kg of body weight) the authors show that meiotic prophase of the spermatogenesis of the barbary drake (cairina moschata l.) lasts 5 days 1/4; the first labeled gametes appear in the ejaculate at the end of the 12th day. | 1977 | 145305 |
| [autoradiography after tritiated thymidine labeling of the abortive gametogenesis in hybrid male ducks from the cross male pekin x female barbary]. | this autoradiographic data concludes that meiotic prophase of the abortive gametogenesis of the sterile hybride drake (from the mating peking male = anas platyrhynchos l. x barbary female = cairina moschata l.) lasts 5 days 1/4. 6 days after the injection of the marker the seminiferous tubules contain numerous labeles necrosing cells but never typical elongated spermatids. | 1977 | 145306 |
| occurrence of duck virus enteritis (duck plague) in pennsylvania, 1968-74. | during the 7-year period 1968-74 cases of duck virus enteritis (duck plague) were diagnosed in waterfowl in pennsylvania. muscovy ducks were affected in 8 cases, geese in 3 cases, and mallard ducks in 1 case. in 5 of these cases either domestic or wild ducks were closely associated with infected waterfowl but were unaffected. | 1975 | 168855 |
| an outbreak of duck virus enteritis (duck plague) in alberta. | duck plague (duck virus enteritis) was disgnosed in a resident population of muscovy ducks (cairina moschata) on a small game farm in alberta. this disease has not been reported previously in canada. clinical signs consisted of cyanosis, depression and acute death. necropsy of two muscovy ducks revealed lesions typical of the disease. there were ulcerations with pseudomembranes in the small intestine, ulcerations with caseous plaques in the esophagus and eosinophilic intranuclear inclusion bodie ... | 1976 | 180302 |
| [ultrastructural aspects of cells with 3 beta-hsdh (delta 5-3 betahydroxysteroid dehydrogenase) activity in female ducks. ii. female barbary ducks (cairina moschata)]. | the cells making up the thin internal theca of the follicle of the barbary duck and which contain are 3 beta hsdh enzyme show all of the ultrastructural characteristics of steroid cells: a well-developed smooth reticulum, tubular cristae mitochondria, a considerable load in lipid inclusionologous cells of the peking duck since they are constantly more dense and their cristae are bigger and less numerous. | 1976 | 184892 |
| spontaneously occurring lymphoproliferative disease in ducks. | a naturally occurring lymphoproliferative disease was observed in a domestic flock of muscovy ducks. gross lesions were observed only in one of three ducks necropsied (in the small intestine). microscopic lesions consisted of mononuclear cell infiltrates composed primarily of reticuloendothelial cells, mature lymphocytes, and plasma cells in livers, spleens, small intestines, peripheral nerves, and brains. antibodies to reticuloendotheliosis virus were detected in sera of four ducks, whereas all ... | 1978 | 206252 |
| immunofluorescent localization and ultrastructural characterization of gonadotrophe cells in the adenohypophysis of the barbary drake (cairina moschata l.) using anti-chicken lh serum. | an indirect immunofluorescence technique and an anti-chicken lh serum were used to localize cells in the adenohypophyses of drakes at different stages of their breeding cycle, after castration, and after castration combined with thyroxine treatment. immunofluorescent cells were distributed throughout both lobes of the adenohypophyses from control and experimental birds and were shown to be alcian blue positive. pas negative, basophiles. immunofluorescent cells were as numerous in castrated birds ... | 1977 | 328161 |
| [fowl cholera. preventive treatment with antibiotics (author's transl)]. | in view of an outbreak of fowl cholera in the duck-and turkey-farming industry, the possibility of instituting long-term preventive treatment of recently acquired birds on the farms involved was studied. satisfactory results were obtained in peking-ducks and turkeys when chlortetracycline was administered at a concentration of at least 100 ppm in the feed for three weeks. satisfactory results were also obtained using a combined preparation of neomycin and oxytetracycline in muscovy ducks or a pr ... | 1979 | 425106 |
| studies on the livestock of southern darfur, sudan, vii. production of poultry under simulated traditional conditions. | observations were made on egg production, egg hatchability and fertility, liveweight and growth characteristics of domestic fowls, muscovy ducks and pigeons kept under simulated traditional conditions in southern darfur. fowl and ducks produced about 50 eggs a year in 4 1/2 clutches spaced at 80 day intervals and pigeons 17 in 8 1/2 clutches at 43 day intervals. first eggs were laid at about 240 days by the fowls, 213 days by ducks and 132 days by pigeons. the annual weight of eggs produced was ... | 1979 | 505586 |
| [requirements of muscovy ducks (cairina moschata domestica) for crude protein and energy levels of fattening diets]. | groups of male and female cairina ducks subjected to equal starter feeding (1st to 3rd weeks) were used from the 4th week of live (fattening period) to test feed mixes of varying energy and crude protein levels (480 energetic feed equivalents/heu[efh] - 140 g crude protein[cp]; 480 efh - 180/g cp; 555 efh - 140 g cp; 555 efh - 180 g cp; 625 eeh - 140 g cp; 625 efh - 180 g cp - all figures referred to 1 kg of feed). the different energy levels remained without influence of the live weight develop ... | 1977 | 603397 |
| [the effect of hybridization on the embryonic germ cell population and the young females produced by the crossing of a male peking duck with a female barbary duck (anas platyrhynchos x cairina moschata)]. | ovarian development has been studied in a hybrid duck (anas platyrhynchos male x cairina moschata female) and in females of the parental peking and barbary species. in the hybrid, the gonadal ridge when it first forms is smaller than in either parental species, and after 16 days of incubation there is less cortical growth and less oogonial proliferation. at hatching, the left ovary of the hybrid contains fewer follicles, perhaps because the reduced size of the hybrid gonadal ridge limits germ ce ... | 1978 | 632731 |
| the occurrence of the intestinal fluke sphaeridiotrema globulus in domestic ducks in new south wales. | a mortality in muscovy ducklings caused by infection with the intestinal fluke, s. globulus, is described. the disease was characterised by depression, anorexia, wasting, diarrhoea and high mortality. the major pathological lesions were associated with the attachment sites of the flukes and consisted of severe enteritis with ulceration, principally affecting the jejunum, but also involving the duodenum and ileum. experimental infections were produced in ducklings by oral administration of either ... | 1977 | 849214 |
| the avian bronchial arteries: species variations. | the bronchial arteries arose from the oesophagotracheobronchial branches of the common carotid arteries. in the goose, duck, muscovy duck, and turkey several small bronchial arteries supplied the whole length of each primary bronchus, including the orifices of the secondary bronchi. in the guinea-fowl and quail similar bronchial arteries supplied only the extrapulmonary part of the primary bronchus. in the pigeon a single true bronchial artery supplied the extrapulmonary part of each primary bro ... | 1977 | 885783 |
| duck plague virus replication in muscovy duck fibroblast cells. | duck embryo fibroblast cell cultures from seven species of ducks were compared for virus yield, plaque quality, and sensitivity to infection by the duck plague herpesvirus (duck virus enteritis). muscovy duck and wood duck cells gave the best results for virus yield and plaque quality, but muscovies were considered superior because they are more available than wood ducks. pintails and lesser scaup gave the poorest results, and pekin duck, black duck, and redhead duck were intermediate. a growth ... | 1976 | 986808 |
| [abortive spermatogenesis in the hybrid duck (cross of male anas platyrhynchos and female cairina moschata). ultrastructural study]. | the ultrastructural study of the abortive spermatogenesis of the hybrid drake (cross: male anas platyrhynchos l. x female cairina moschata l.) shows the following characteristics: 1) deep anomalies during the pachytene stage (meiotic prophase) where the chromosomes form more or less irregular packs close to the nuclear enveloppe; 2) the total lack of 2nd spermatocytes and in their place were found: --either some cells with lobed or fragmented nuclei in a cytoplasm filled with numerous annulate l ... | 1976 | 1028452 |
| epithelial intracytoplasmic herpes viral inclusions associated with an outbreak of duck virus enteritis. | several muscovy ducks from a free-roaming flock of 65 muscovy and mallard ducks died over a 3-week period. three muscovy ducks were necropsied. gross and microscopic changes were compatible with duck virus enteritis, and the virus was isolated. in addition to intranuclear viral inclusion bodies in several tissues, intracytoplasmic inclusion bodies were present in esophageal and cloacal epithelium. by electron microscopy, the membrane-bound intracytoplasmic inclusions were found to contain envelo ... | 1992 | 1314555 |
| host range of rous sarcoma virus pseudotype rsv(hprs-103) in 12 avian species: support for a new avian retrovirus envelope subgroup, designated j. | the host ranges of the rous sarcoma virus (rsv) pseudotype rsv(hprs-103) of a novel avian leukosis virus (alv), strain hprs-103, and representative rsv pseudotypes of subgroups a to f, have been determined in embryo fibroblasts from 12 avian species. domestic fowl, red jungle fowl, sonnerat's jungle fowl and turkey were susceptible to infection by rsv(hprs-103); ring-necked pheasant, japanese green pheasant, golden pheasant, japanese quail, guinea-fowl, peking duck, muscovy duck and goose were r ... | 1992 | 1331300 |
| the first outbreak of fowl cholera in muscovy ducks (cairina moschata) in japan. | the first outbreak of fowl cholera occurred in a flock of muscovy ducks (cairina moschata) in okinawa prefecture of japan in november 1990. fifty (25%) of 200 birds in a farm died of an acute disease. remaining birds recovered after treatment with oxytetracycline. pasteurella multocida subsp. multocida was isolated in pure culture from all tissues tested from two dead birds. serovars of the isolates were identified as carter's capsular type a. heddleston's type 3.4.12, and namioka's type 5:a whi ... | 1992 | 1477178 |
| a comparison of the responses of dispersed steroidogenic cells derived from embryonic adrenal tissue from the domestic chicken (gallus domesticus), the domestic pekin duck and the wild mallard duck (anas platyrhynchos), and the domestic muscovy duck (cairina moschata). | the steroidogenic responsiveness of adrenal cell suspensions prepared from domestic chicken adrenal tissue at the end of embryogenesis was compared to the responses of similar preparations derived from the wild and domesticated mallard duck (anas platyrhynchos), and the domesticated muscovy duck (cairina moschata). in all cases, the masses of corticosterone (b), aldosterone (aldo), and deoxycorticosterone (doc) released from cells incubated in medium containing 1-24 acth exceeded the estimated h ... | 1992 | 1490583 |
| [the genetic variability in the amylase isoenzymes of hybrid muscovy (cairina moshata) and domestic (anas platyrhynchos) ducks compared to the initial species]. | genetically conditioned polymorphism of alpha-amylases in musk ducks, domestic ones and their hybrids has been described. two isoenzymes (amy-1, amy-2) are in blood serum of the ducks. one of them is apparently formed in crope gland and other--in pancreas. amy-2 is monomorphic in both species. amy-2 is polymorphic with three alleles (amy-1a, amy-1b, amy-1b) in musk ducks and monomorphic in domestic ducks (amy-1c). the hybrids have also allele obtained by them from domestic ducks. | 1990 | 1700518 |
| avian tandem repeats: nuclear protein binding sites and the origins of short tandem repetitive dnas. | a 14 bp repeat isolated from the genome of a mallard duck (anas platyrhynchos) and a 13 bp repeat isolated from the genome of a muscovy duck (cairina moschata) were both tandem and genus-specific. there were 2.1 x 10(6) copies of the 14 bp repeat in the mallard duck genome and 1.3 x 10(6) copies of the 13 bp repeat in the muscovy duck genome. these two repeats were not obviously homologous but each contains different transcription protein binding sites. experimentally, the two repeats were also ... | 1991 | 1772445 |
| [direct electron microscopic virus detection in diseases of goslings and moscovy ducks (cairina moschata)]. | various organs of goslings and muscovy duck chickens were investigated by electron microscopy, with the negative contrast technique being used in a routine diagnosis programme. investigations were extended over several years and were, more specifically, applied to 1,148 samples obtained from 525 goslings and 429 samples which had been collected from 139 muscovy duck chickens. viruses were directly detected in 132 or 76 samples. parvoviruses were predominant in geese and muscovy ducks and account ... | 1991 | 1789728 |
| isolation of poxvirus from debilitating cutaneous lesions on four immature grackles (quiscalus sp.). | poxvirus was isolated from nodules on four immature grackles (quiscalus sp.) collected in two residential areas of victoria, texas. all of the birds were emaciated and had nodules on the eyelids, bill, legs, toes, and areas of the skin on the wings, neck, and ventral abdomen. these pox nodules were extensive and probably interfered with both sight and flight. the preliminary diagnosis was confirmed by virus isolation, histopathology, and electron microscopy. poxvirus was isolated on the chorioal ... | 1991 | 1851418 |
| the interspersed dna repeat conserved in water birds' genomes. | a putative old and ubiquitous interspersed dna repeat family was identified from taqi restriction, m13 cloning, and sequencing of the genomic dna of a mallard (anas platyrhynchos), a muscovy duck (cairina moschata), a toulouse goose (anser anser), and a black swan (cygnus atratus). a 425-bp consensus core sequence was obtained for the interspersed family. the 425-bp unit was about 2% of the avian genome and was found to be conserved in at least four genera of the order anseriforme: anas, anser, ... | 1991 | 1889740 |
| insulin sensitivity and liver insulin receptor structure in ducks from two genera. | insulin sensitivity and liver insulin receptor structure were studied in 5-wk-old ducks from two genera (muscovy and pekin). in the fasting state, both duck types were equally resistant to exogenous insulin compared with chicken. despite the low potency of duck insulin, the number of insulin receptors was lower in muscovy duck and similar in pekin duck and chicken liver membranes. after 125i-insulin cross-linking, the size of the alpha-subunit of the receptors from the three species was 135,000. ... | 1991 | 1928434 |
| analysis of the sternotrachealis muscle fibers in some anseriformes: histochemistry and sex differences. | histochemical characteristics and sizes of the fibers of the sternotrachealis (st) muscle have been investigated in some anseriformes (mallard, pekin duck, muscovy duck, and goose) of both sexes. a sexual dimorphism has been shown in the muscle of the species examined. in the mallard and pekin duck, the male st muscle shows type iiia fibers in addition to the type i, iia, and iib fibers observed also in the female. in the muscovy duck, the male muscle has only type i and iia fibers, whereas the ... | 1990 | 2149489 |
| the effect of tamoxifen on semen fertilization capacity in white leghorn male chicks. | tamoxifen (tam) is an antiestrogen that advances sexual puberty in cockerels, turkey toms, and muscovy drakes. the effect of tam on semen-fertilization capacity in white leghorn (wl) male chicks was assayed in the present study. sixty, 2-wk-old, male chicks were divided into two equal groups. the chicks from one group were injected im with 1 mg of tam per kg of bw every other day; those from the second group were vehicle-treated (with corn oil) and served as controls. each chick was paired with ... | 1990 | 2235838 |
| [immunoprophylaxis against an acute p. multocida type d infection in cairina moschata]. | an acute p. multocida infection led to severe losses in a big cairina moschata fattening farm. all isolated strains belong to serogroup d. after testing the virulence and immunogenic properties of the isolated strains in nmri mice, we used an highly virulent and immunogenic strain for developing an inactivated vaccine (formaline inactivated, al (oh)3 adsorbed, with a content of 3 x 10(9) bacteria/ml). two sc. immunizations of cairina at an age of 10 and 24 days resulted in immunity. all immunize ... | 1990 | 2268254 |
| the effect of tamoxifen on sexual puberty of turkey toms and muscovy drakes. | the effects of tamoxifen (tam) on reproductive traits in young turkey toms and muscovy drakes were studied. at 6 wk of age, five toms were injected every other day with 1 mg tam/kg bw, while six others were treated with corn oil (controls). in the toms, using tam advanced semen production by 4 wk (13.5 versus 17.5 wk of age) and increased the size of the snood and testes. similarly, in the muscovy drake, using tam enhanced penis growth and advanced semen production by 5 wk. | 1990 | 2320529 |
| [intensive raising of muscovy ducks]. | concerning the husbandry of muscovy ducks in intensive systems there is an urgent need to find ways of substituting certain practices that are incompatible with animal welfare. this is a major problem to be solved in cooperation with producers and scientific institutions. the state veterinary officers of the weser-ems district consider in this respect the following key principles as essential: 1. those husbandry systems which are only to be realized by means of the current practice of trimming t ... | 1990 | 2351047 |
| rhythmic occurrence of sexual behavior and egg laying activity of muscovy ducks. | 1. the existence of nychthemeral rhythms in the sexual behaviour of muscovy ducks, kept under intensive husbandry conditions, was investigated. studies were also carried out of the relationships between artificial insemination or natural mating times, oviposition time and female fertility. 2. sexual activity (as measured by the number of complete matings observed) followed a trimodal pattern with peaks of activity in the second to third, 5th to 6th and 10th to 15th hours of the photoperiod. the ... | 1990 | 2354378 |
| the digestibility of cell-wall polysaccharides from wheat (bran or whole grain), soybean meal, and white lupin meal in cockerels, muscovy ducks, and rats. | the digestibility of nonstarch polysaccharides (nsp) were measured in cockerels. muscovy ducks, and rats by using four diets where the only sources of nsp were wheat bran (diet b), whole wheat grain (diet w), soybean meal (diet s), or white lupin meal (diet l). the four diets contained similar amounts of crude protein (24.4%), lipids (5.2%), and nsp (6.9%). the proportions of water-soluble nsp in total nsp were 11.1% (diet b), 19.7% (diet w), 8% (diet s), and 11.5% (diet l). the nsp contents of ... | 1990 | 2356179 |
| muscovy ducks as an adjunct for the control of the house fly (diptera: muscidae). | in laboratory trials, muscovy ducks, cairina moschata l., removed adult house flies, musca domestica l., at least 30 times faster than commercial bait cards, coiled fly paper rolls, fly sheets, or fly traps. the lt90 for ducks in 0.24-m3 cages with 100 flies was 0.6 h compared to 15.3 h for the most effective commercial device. ducks survived for at least 12 wk in pens with calves, without injury or feed supplement. ducks ingested a mean of 25 house flies per 15-min observation period when popul ... | 1990 | 2376638 |
| evolutionary comparison of the avian igl locus: combinatorial diversity plays a role in the generation of the antibody repertoire in some avian species. | immunoglobulin light chain (igl) diversity is generated in the chicken by recombination between the single functional variable (vl) and joining (jl) gene segments and subsequent somatic diversification of the rearranged vl region. in order to determine whether these events are a general feature of avian igl genes, we analyzed the organization and recombinatorial characteristics of the igl loci of several other avian species. southern blot analysis of bursal and germline dna using chicken vl and ... | 1989 | 2489032 |
| conserved organization of an avian histone gene cluster with inverted duplications of h3 and h4 genes. | the organization of histone gene clusters of the duck cairina moschata was studied in the dna inserts of two recombinant phage that overlap and feature identical histone gene arrangements but differ in sequence details and in the extent of repetition of an at-rich motif in one of the nontranscribed spacer regions. these few but substantial differences between otherwise nearly identical histone gene groups suggest that we have independently isolated alleles of the same site of the duck genome or ... | 1989 | 2494350 |
| effects of antithyroid drug on the rectal temperature and metabolic parameters of ducks (cairina moschata). | the effect of propylthiouracil oral treatment (400 mg/day per bird for 20 days) on body and thyroid weight, rectal temperature and plasma metabolic parameters of ducks (cairina moschata) was determined. propylthiouracil treatment produced a reduction (p less than .01) in body weight and an increase (p less than .01) in thyroid weight. the antithyroid drug also produced a decrease in rectal temperature starting from the 15th day of treatment, but did not significantly change blood glucose. plasma ... | 1989 | 2587473 |
| [isolation from ducks of a hypervirulent strain of duck plague virus and an avian type 6 paramyxovirus]. | this paper describes the isolation and identification of a duck plague virus (dp) and a paramyxovirus (pmv6), from the livers and intestines collected in 4-month old mule ducks, under fattening, exhibiting 75% mortality and necrotic-haemorrhagic gross lesions. these viruses were isolated in specific pathogen free (spf) muscovy duck eggs and spf chicken eggs respectively. then the dp virus was adapted to duck and chicken fibroblasts. the disease was reproduced in 2-week old spf muscovy ducklings, ... | 1987 | 2827947 |
| histological data associated with muscovy duck reovirus infection. | | 1988 | 2845626 |
| [vaccination of geese (anser anser dom.) and muscovy ducks (cairina moschata dom.) against parvovirus hepatitis (s. derzsy's disease)-- report of a field trial with the attenuated live virus vaccine palmivax]. | | 1985 | 2996870 |
| dependence of o2 transfer conductance of red blood cells on cellular dimensions. | to estimate the significance of the dimensions of rbc on o2 transfer, the kinetics of o2 release from rbc into medium containing dithionite (40 mmol/l) was measured, by a stopped-flow technique, for nine different species with varying rbc size (man, llama, vicuna, alpaca, dromedary camel, pygmy goat, domestic hen, muscovy duck and turtle). the observed o2 transfer kinetics were found to be size-dependent, i.e. the o2 transfer conductance of the single rbc, gst, was lower, whereas the specific o2 ... | 1988 | 3364283 |
| social specificity: interaction with own species is necessary to foster species-specific maternal preference in ducklings. | previous studies have shown that if domestic mallard ducklings are allowed social interaction with broodmates after their initial exposure to a stuffed mallard (anas platyrhynchos) hen, they later show a visual preference for the familiar mallard over an unfamiliar redhead (aythya americana) hen. birds kept in social isolation do not make this difficult discrimination. in the present study, we examined whether this social enhancement of imprintability to a natural maternal model is merely the re ... | 1988 | 3378677 |
| riboflavin-binding protein from reptiles: a comparison with avian riboflavin-binding proteins. | 1. riboflavin-binding protein (rbp) has been isolated for the first time from reptilian sources. 2. rbp from eggs of python molurus (indian python) and chrysemys picta (painted turtle) has been isolated and compared to rbp from gallus gallus domesticus (chicken), a well-characterized protein, and a newly isolated rbp from cairina moschata (muscovy duck). 3. each of the proteins is phosphorylated and glycosylated. 4. the ratio of riboflavin binding to protein is 1:1 and the kd for each protein is ... | 1988 | 3396329 |
| [tolerance of halofuginone (stenorol) by geese (anser anser f. dom.), flight ducks (cairina moschata f. dom.) and peking ducks (anas platyrhynchos f. dom.)]. | | 1986 | 3516638 |
| host specificity of cryptosporidium sp. isolated from chickens. | the host specificity of cryptosporidium sp. infecting chickens was evaluated by oral inoculation of oocysts into 6 different species of neonatal rodents, adult nude mice (athymic), neonatal conventional and gnotobiotic pigs, turkeys, muscovy ducks and bobwhite quail. examinations of tissue sections, ileal mucosal smears, fecal flotations and stained feces failed to reveal any infections in the mammalian species examined. oocysts were observed in the feces, and developmental stages were observed ... | 1986 | 3537258 |
| two daily glucagon injections induce nonshivering thermogenesis in muscovy ducklings. | in 6-wk-old chronically glucagon-treated (gt) ducklings, the calorigenic effect of intraperitoneal test injection of glucagon was measured at 25 and 4 degrees c ambient temperature (ta). at 25 degrees c ta, the increase in metabolic rate (mr) due to test injection of glucagon (360 micrograms/kg) reached 5.3 w/kg (i.e., 98% above the saline control value) in gt ducklings and only 1.7 w/kg (i.e., 29% above the control value) in control (tn) ducklings. after the injection, gt ducklings developed a ... | 1987 | 3578510 |
| experimental transmission of duck hepatitis b virus to pekin ducks and to domestic geese. | we investigated experimental transmission of duck hepatitis b virus to its original host, the domestic pekin duck, and to three other avian species. intramuscular injection of a standard inoculum of duck hepatitis b virus into 2- to 5-day-old pekin ducklings hatched from a duck hepatitis b virus-free flock resulted in viremia in 100% of 107 animals, indicating that duck hepatitis b virus infection of young progeny of a defined duck hepatitis b virus-free flock occurs reproducibly. when the same ... | 1987 | 3610050 |
| further search for interaction antigens on erythrocytes in selected species hybrids of birds. | replicated blood typing reagents were made to detect an interaction antigen (hybrid substance) on the red cells of several species hybrids of birds. reagents against pigeon x ringneck dove hybrids are compared with other reagents made in an effort to find a similar interaction in the chicken x guinea fowl hybrid and in the ringneck x mourning dove hybrid. mallard x muscovy hybrids also were tested for their reported red cell interaction product. both rabbits and parental types were injected with ... | 1986 | 3737514 |
| kinetics of oxygen uptake and release by red blood cells of chicken and duck. | the specific conductance (g) for o2 transfer by red blood cells (rbcs) of chicken and muscovy duck was measured using the experimental (stopped-flow) and analytical techniques (rbc model) previously applied to human rbc (yamaguchi, nguyen phu, scheid & piiper, 1985). avian rbcs behaved similarly to human rbcs: g values were of similar magnitude; g for o2 uptake decreased with time and increasing o2 saturation; g for o2 release at high levels of dithionite decreased slightly with decreasing o2 sa ... | 1986 | 3760769 |
| development of trichobilharzia australis blair & islam, 1983 in the snail, lymnaea lessoni deshayes and in an experimental definitive host, the muscovy duck. | the development of trichobilharzia australis blair & islam, 1983 in the intermediate host, lymnaea lessoni deshayes and in experimental definitive hosts, muscovy ducks is described. 24 hours after entry into the snail, miracidia had lost their cilia, epidermal plates and lateral processes and became young mother sporocysts. they were located in the tissues of the head-foot organ of the snail and were oval in cross section but still retained the shape of a miracidium, and measured 0.058-0.066 x 0 ... | 1986 | 3794294 |
| multilocular adipocytes from muscovy ducklings differentiated in response to cold acclimation. | morphological and functional aspects of adipose tissue from 6-week-old cold-acclimated muscovy ducklings reared at 4 degrees c ambient temperature (ta) from the age of 1 week were examined for the occurrence of brown adipose tissue (b.a.t.) in order to explain non-shivering thermogenesis (n.s.t.) observed at this age. metabolic rate and integrated muscle electrical activity (e.m.g.) were measured at different ta (from -10 to +28 degrees c) in cold-acclimated and in control ducklings reared at th ... | 1986 | 3795059 |
| muscovy duck mortality not caused by haemoproteus. | | 1985 | 3928910 |
| [corticotropic adenohypophyseal cells in the barbary duck (cairina moschata l.). immunocytochemistry]. | | 1974 | 4377540 |
| [effects of hybridization on ovary and ovulatory activity in adult hybrid ducks resulting from a cross between peking males (anas platyrhynchos) and muscovy females (cairina moschata). comparison with female parent species]. | | 1974 | 4469413 |
| [annual changes in the testicular activity of hybrid ducks resulting from crossing pekin males (anas platyrhynchos l.) and barbarie females (cairina moschata l.)]. | | 1972 | 4651588 |
| [ultrastructure of leydig and sertoli cells of the barbary duck(cairina moschata l.) testis during sexual activity]. | | 1973 | 4803181 |
| [intersexuality of the ovary of hybrid ducks (cairina moschata l. male x anas platyshyachos l. female) and hormone activity]. | | 1968 | 4973710 |
| [the interbreeding of the khaki campbell duck (anas platyrhynchos l) x the barbarie duck (cairina moschata l). 1. study of the genital system of the embryos and adults. 2. study of the activity of the gonads]. | | 1965 | 5324362 |
| sex-linked chocolate coloration in the muscovy duck. | | 1970 | 5448682 |
| [on the extreme sexual dimorphism in the growth of the muscovy duck, cairina meschata flemm. vi. the physiological effect of doses of estradiol or ovarian stimulation on growth]. | | 1968 | 5694337 |
| brown-rippled, a recessive mutant in the muscovy duck. | | 1968 | 5713633 |
| case report--salmonella pullorum in a muscovy (cairina moschata) duck. | | 1963 | 5896507 |
| differences in growth and thyroid function of pekin and muscovy ducks either untreated or treated with stilboestrol. | | 1965 | 5898104 |
| heterogeneity of serum, egg amylase and egg lysozyme in the interspecific hybrids of ducks. | polymorphism of serum and egg amylase by means of horizontal agarose gel electrophoresis and egg lysozyme by means of horizontal starch gel electrophoresis in pekin, muscovy ducks and their interspecific hybrids was studied. in the interspecific hybrids of ducks the codominant type of heredity of serum, egg yolk and egg white amylase isozymes, as well as egg white lysozyme, were found. | 1983 | 6191917 |
| vertical transmission of duck plague virus (dpv) by apparently healthy dpv carrier waterfowl. | duck plague virus (dpv) was transmitted vertically in muscovy, pekin, and mallard ducks that were persistently infected with the la-sd-73, msn-wi-77, or co-wi-73 isolates of dpv. the effects of vertical transmission on the fertility and hatchability of eggs laid by dpv carrier ducks varied with the dpv isolate and duck species. fertility was reduced significantly only in eggs laid by msn-wi-77 virus carrier pekin and muscovy ducks. the hatchability of eggs laid by dpv carrier mallards and muscov ... | 1981 | 6279069 |
| the isolation and partial characterization of linked alpha a- and alpha d-globin genes from a duck dna recombinant library. | genomic dna from an adult duck (cairina moschata) was used to construct a library of cloned dna fragments in the vector lambda charon 4a. screening of the dna library resulted in the isolation of a recombinant, d alpha g-1, which carries both the adult duck alpha a- and alpha d-globin genes. the two globin genes are separated by approx. 2.2 kb of dna, they are encoded by the same dna strand and their orientation with respect to the direction of transcription is 5'- alpha d- alpha a-3'. partial s ... | 1982 | 6290322 |
| laboratory confirmed outbreaks of duck virus enteritis (duck plague) in the united kingdom from 1977 to 1982. | from 1977 to 1983 the central veterinary laboratory, weybridge confirmed 19 outbreaks of duck virus enteritis in the united kingdom. all the outbreaks involved collections of captive waterfowl and there were no reported cases in commercial ducks. in many instances the disease was associated with contact with migrating waterfowl, particularly male mallards (anas platyrhynchos). muscovy ducks (cairina moschata) and related species appeared to be particularly susceptible. the most sensitive system ... | 1984 | 6324446 |
| susceptibility of pekin and muscovy ducks to haemoproteus nettionis. | domestic muscovy (caririna moschata) and pekin (anas platyrhynchos) ducklings were exposed to or injected with homogenates of culicoides flies collected at white pine, michigan. gametocytes of haemoproteus nettionis were detected in both species of ducks at 16 days post-exposure. culicoides downesi was indicated as a vector of h. nettionis in northern michigan. blood infections occurred with a higher prevalence and reached a higher intensity in muscovy ducks. endogenous tissue stages of h. netti ... | 1984 | 6429353 |
| volumetric growth of muscle fibers in ducks. | pekin and muscovy breeds of domestic ducks were reared from hatching to 10 weeks. males and females of each breed were killed at weekly intervals and sartorius muscles were removed after the onset of rigor mortis. fiber diameters were measured from macerated preparations after fixation with formaldehyde. all volumetric data were corrected to a common sarcomere length. longitudinal and radial growth of muscles reached their maximum velocity during the fourth and fifth weeks, respectively. in musc ... | 1980 | 6453044 |
| allometric growth of histochemical types of muscle fibers in ducks. | radial growth (fiber cross sectional area) was measured at the midlength of sartorius muscles in pekin and muscovy breeds of domestic ducks. pekins exhibited faster early growth (up to 7 weeks after hatching) while muscovies exhibited greater divergence between sexes (after 7 weeks). in both sexes of both breeds, radial growth of strong-atpase fibers failed to keep pace with that of weak-atpase fibers; allometric growth ratio, k = 0.64 in muscovy males, k = 0.65 in muscovy females, k = 0.61 in p ... | 1981 | 6453045 |
| histological development of the paracloacal vascular body in the male embryo of muscovy duck, cairina moschata. | | 1984 | 6482124 |
| histochemical research into the facial caruncle of the muscovy duck (cairina moschata domestica l.) and its relationship with the adrenal glands and gonads. | histochemical studies carried out on prepuberal and adult, males and females, muscovy ducks (the black ancestral variety) showed that the beginning of the facial caruncle is caused mainly by local androgenic activities. in adult males, support for this organ comes from the steroid hormones originating from the adrenal gland and testis. in adult females, caruncular androgenic activity also seems to be necessary for the support of this organ. | 1984 | 6598145 |
| artificial insemination and natural mating in the crossbreeding of the muscovy drake and the pekin duck. | artificial insemination and natural mating were used for the crossbreeding of the muscovy drake with the pekin duck in order to produce the mule duck. an average fertility rate of 48% was reached by artificially inseminating twice a week. in small flocks, however, when the male to female ratio was 1:2.5 (or higher), natural mating yielded a fertility rate of 80%. | 1984 | 6709575 |
| mortality in muscovy ducks (cairina moschata) caused by haemoproteus infection. | haemoproteus infection was confirmed in white pekin ducks (anas platyrhynchos domesticus) following placement in a pond where severe mortality from a respiratory condition apparently caused by schizonts of haemoproteus had occurred in muscovy ducks (cairina moschata). blood from one infected white pekin duck was experimentally inoculated into five muscovy ducks; two of the five developed large numbers of schizonts in the endothelial cells and died. illness did not occur in the white pekin ducks. | 1980 | 6768903 |
| comparison of electrophoretic and immunological properties of myoglobins from domestic birds-chickens, quail, duck, goose, muscovy and pigeon. | | 1981 | 6806517 |
| microcystis aeruginosa toxin: cell culture toxicity, hemolysis, and mutagenicity assays. | crude toxin was prepared by lyophilization and extraction of toxic microcystis aeruginosa from four natural sources and a unicellular laboratory culture. the responses of cultures of liver (mahlavu and pcl/prf/5), lung (mrc-5), cervix (hela), ovary (cho-k1), and kidney (bgm, ma-104, and vero) cell lines to these preparations did not differ significantly from one another, indicating that toxicity was not specific for liver cells. the results of a trypan blue staining test showed that the toxin di ... | 1982 | 6808921 |
| the amino-acid sequence of northern mallard (anas platyrhynchos platyrhynchos) hemoglobin. | the complete amino-acid sequence of the major hemoglobin component (hba) of the adult northern mallard (anas platyrhynchos platyrhynchos) is presented. a minor component hbd was also detected but in low concentrations. the sequences of alpha a- and beta-chains were established by automatic edman degradation on tryptic peptides and peptides obtained by specific chemical cleavages. the alignment of the peptides was performed by comparison with the alpha a- and beta-chains of greylag goose hemoglob ... | 1983 | 6884992 |
| two low-molecular weight apoproteins (apovitellenins i and ii) from a lipoprotein of goose's egg yolk: a comparison with related species. | as part of a comparative study of egg yolk from different avian species, the major lipoprotein and its mixed apoproteins from the egg yolk of the chinese goose (anser cygnoides) have been prepared. from the apoprotein mixture, two new proteins, of molecular weight approximately 10000 and 22000 according to gel electrophoresis in detergent, have been isolated by gel-filtration chromatography in urea. the protein of lower molecular weight corresponds in amino acid sequence to apovitellenin i, a pr ... | 1982 | 7150114 |
| polymorphism of yolk proteins in the interspecific hybrids of ducks. | 1. polymorphism of lipid-free proteins of egg yolk by means of horizontal starch gel electrophoresis in pekin, muscovy ducks and their interspecific hybrids was studied. 2. in the interspecific hybrids of ducks the codominant type of heredity of beta livetin and transferrin were found. | 1982 | 7199416 |
| the frequency of collection and semen production in muscovy ducks. | 1. semen was collected by artificial vagina from 40 muscovy drakes at frequencies of twice daily; once daily; once every 2 d; and once every 3 d for 24 consecutive days. 2. the total mean semen volume over a 24-d period increased linearly and significantly from 2-15 to 9 x 40 ml as the frequency of collection increased from once every 3 d to twice daily, but the average semen volume per collection decreased linearly and significantly from 1 x 07 to 0 x 78 ml. 3. the total number of spermatozoa p ... | 1980 | 7407662 |
| duck hepatitis b virus infection of muscovy duck hepatocytes and nature of virus resistance in vivo. | to test the hypothesis that in vivo resistance to hepadnavirus infection was due to resistance of host hepatocytes, we isolated hepatocytes from muscovy ducklings and chickens, birds that have been shown to be resistant to duck hepatitis b virus (dhbv) infection, and attempted to infect them in vitro with virus from congenitally infected pekin ducks. chicken hepatocytes were resistant to infection, but we were able to infect approximately 1% of muscovy duck hepatocytes in culture. infection requ ... | 1994 | 7511172 |
| analysis of the complete nucleotide sequences of goose and muscovy duck parvoviruses indicates common ancestral origin with adeno-associated virus 2. | the complete nucleotide sequences of two parvoviruses isolated from goose and muscovy duck were determined. the two virus genomes share 81.9% nucleotide sequence identity, indicating that they are closely related. the coding regions are bracketed by inverted terminal repeats containing palindromes. this is similar to the genome organization of human parvoviruses, adeno-associated virus 2, and b19. amino acid sequence comparison shows that the closest relative of the goose and muscovy duck parvov ... | 1995 | 7571426 |
| photoperiodic control of sexual maturation in muscovy drakes. | the influence of photoperiodic control on reproductive development was investigated in muscovy drakes by the use of night-interruption photoschedules consisting of a main photofraction of 6 hr and a secondary photofraction of 1 hr, interrupting the dark period 6 hr (group a), 8 hr (group b), 10 hr (group c), and 12 hr (group d) after dawn. sexual maturity, assessed by the increase in plasma concentrations of luteinising hormone (lh) and testosterone, was achieved in all groups by week 34. howeve ... | 1995 | 7600769 |
| susceptibility to duck hepatitis b virus infection is associated with the presence of cell surface receptor sites that efficiently bind viral particles. | to test the hypothesis that susceptibility of hepatocytes to duck hepatitis b virus (dhbv) infection requires cell surface receptors that bind the virus in a specific manner, we developed an assay for the binding of dhbv particles to monolayers of intact cells, using radiolabeled immunoglobulin g specific for dhbv envelope protein. both noninfectious dhbv surface antigen particles and infectious virions bound to a susceptible fraction (approximately 60%) of pekin duck hepatocytes. in contrast, b ... | 1995 | 7609048 |
| goose parvovirus--an autonomous member of the dependovirus genus? | goose parvovirus is the etiological agent of derzsy's disease, a fatal hepatitis of young geese. the virus infects geese and muscovy ducks and can be propagated in the laboratory in primary embryonic goose fibroblasts. to date the virus has only been classified by morphological, biochemical, and culture characteristics as an autonomous parvovirus. we now report the cloning and partial sequencing of 3434 nucleotides of the viral genome. three overlapping clones were obtained, encoding regions in ... | 1995 | 7618268 |
| an immunohistochemical survey of peptide-containing nerves in the copulatory apparatus of several male birds. | distribution of peptide-containing nerves in male copulatory apparatus as well as rectal and cloacal ganglia were examined immunohistochemically in cock, guinea fowl, duck and muscovy duck. neurofilament protein-immunoreactive nerves were also examined to investigate general distribution of nerves. substance p (sp)-, vasoactive intestinal polypeptide (vip)-, calcitonin gene-related peptide (cgrp)-, and neuropeptide y (npy)-immunoreactive (ir) nerves were detected in all four species of birds whe ... | 1993 | 7683938 |
| isolation, identification, and plaque titration of parvovirus from muscovy ducks in japan. | muscovy ducks (cairina moschata) showed abnormal feathering, leg weakness, and high mortality. a virus was isolated from these ducks after several blind passages in embryonating muscovy duck eggs. the isolate was resistant to chloroform, to ph 3.2, and to 65 c for 30 min. electron microscopy showed that the isolate was an icosahedral and nonenveloped virus 20-22 nm in diameter. the isolate reacted with an antiserum against a goose parvovirus in agar gel precipitation tests. after 15 passages of ... | 1994 | 7702515 |
| production of digoxigenin-labelled dna probe for detection of muscovy duck parvovirus. | a chemiluminescent dot-blot hybridization assay was developed for the detection of muscovy duck parvovirus (dpv) by using a non-radioactive dpv dna probe. a 1030bp hindiii-bg/ii fragment of dpv dna was labelled with digoxigenin-labelled dutp. the hybridized dpv dna probes were detected by an immunoenzymatic reaction using anti-digoxigenin-antibody fab fragments conjugated to alkaline phosphatase and visualized by chemiluminescent reaction. the assay proved to be sensitive since up to 3 fg of hom ... | 1995 | 7760858 |
| cdna sequence and organization of the immunoglobulin light chain gene of the duck, anas platyrhynchos. | a cdna was cloned which encoded an immunoglobulin (ig) light (l) chain of the white pekin duck. the organization of the variable (v) and constant (c) domains was analyzed by genomic southern blotting. the duck l chain gene has a similar chromosomal organization to that of the chicken, with a single lambda-like c region and multiple vl, hybridizing elements. the amino acid sequence of the vl region of the white pekin duck l chain showed 88% identity with the muscovy duck and 87% identity with the ... | 1994 | 7768317 |
| uveal malignant melanoma in a duck. | an adult male muscovy (cairina moschata) x peking (anas platyrhynchos) duck had a primary malignant uveal melanoma with periocular extension involving the left eye. the periocular mass displaced the globe 1.5 cm laterally. thoracic metastasis of the ocular neoplasm infiltrated the pectoral muscles, rib cage, and cranial lung lobe on the left side, causing diminished voluntary motion of the left wing. the left orbit was exenterated, but tumor regrowth was evident within 2 weeks. this case was unu ... | 1995 | 7775238 |
| biochemical and genomic characterization of muscovy duck parvovirus. | a duck parvovirus (dpv) isolated from muscovy ducks during the epizootic in france in 1989 was purified from inoculated allanto-amniotic fluids by cscl density gradient centrifugation and characterized. full and empty non-enveloped icosahedral viral particles were observed banding at densities of 1.39 to 1.42 and 1.38 respectively, with a diameter of 22 to 23 nm. viral proteins were analyzed by sds-page and the estimated molecular weights of the 3 major proteins were 91, 78 and 58 kda. the nucle ... | 1994 | 7826205 |
| genetic parameters from factorial cross breeding in two duck strains (anas platyrhynchos) brown tsaiya and pekin, for growth and fatty liver traits. | 1. a total of 655 mule ducklings were produced in three hatches by artificial insemination of common duck females brown tsaiya and pekin "alienor" and of their 2 reciprocal crossbreds with muscovy semen. 2. they were fed ad libitum until 6 weeks, then restricted to one meal per day until day 75 and afterwards preforce fed until day 84 and subsequently forced fed by 2 crammers, twice a day, from the age of 85 d and for a maximum of 13 d. 3. body weight at hatching, 28 d, 56 d, 75 d, 84 d and at s ... | 1994 | 7828009 |
| heart and body growth in ducks. | growth of body and heart weight in drakes was measured to 154 days of age in mallards, 2 lines of white pekins (anas platyrhynchos), muscovys (cairina moschata), and a muscovy x white pekin cross. allometric heart growth was slightly negative in the mallard and its domestic forms (allometric exponent 0.895 < b < 0.943) whereas no significant difference from isometry was detected in muscovy ducks and its cross. the relation between heart and body weight, using all stocks combined, yielded an expo ... | 1994 | 7928022 |
| host restriction in the productive cycle of avian polyomavirus budgerigar fledgling disease virus type 3 depends on a single amino acid change in the common region of structural proteins vp2/vp3. | the three avian polyomaviruses budgerigar fledgling disease virus types 1 to 3 (bfdv-1 to -3) contain genomes of identical size, 4981 bp. with differences of up to only 15 bp between the three genomes, these viruses show distinct tropism for cultured cells of various avian species: infection of chicken embryo (ce) cells with bfdv-1 and -2 results in virus propagation, whereas bfdv-3 is not replicated; all three viruses replicate, with different efficiencies, in infected muscovy duck cells. trans ... | 1994 | 8077924 |