cardiac innnervation in the prenatal stages of anas poecilorhyncha.innervation of the heart has been observed in the progressive developmental stages of anas poecilorhyncha ranging from 8 h to 14 days stages using silver impregnation technique of ungewitter (1951). vagal cardiac fibres reach the atrial wall on the fourth day. migration of nerve cells and ganglia has been observed from the more anterior regions to the heart along the precaval veins. the adult pattern of the heart is first established at the 8 days stage while the traces of the endocardial cushio ...19761020809
intestinal carriage of yersinia pseudotuberculosis by wild birds and mammals in japan.fecal specimens were obtained from wild birds and mammals in the eastern part of shimane prefecture, japan, an area where serotype 1b, 2b, 3, and 4b strains of yersinia pseudotuberculosis were found to be prevalent in humans. each of 869 animals, including 259 wild birds and 610 wild mammals, was screened for yersiniae. a total of 37 strains of y. pseudotuberculosis were isolated from 34 (5.6%) mammals, including 23 raccoon dogs (nyctereutes procyonoides), eight deer (cervus nippon), two hares ( ...19912059038
[low genetic differentiation and close evolutionary connection between anas platyrhynchos and anas poecilorhyncha: data from rapd-pcr analysis].using rapd-pcr, we examined genetic diversity and phylogenetic relationships in two groups of river ducks: anas platyrhynchos, a. poecilorhyncha, a. strepera and a. crecca, a. formosa, a. querquedula. molecular taxon-specific markers were found for teals (a. crecca, a. formosa, a. querquedula) and gadwall (a. strepera). each of the species examined was shown to exhibit high genetic diversity. the mean levels of intraspecific genetic polymorphism in the groups of mallards (p = 77%) and teals (p = ...200314658340
antibodies to flaviviruses in wild ducks captured in hokkaido, japan: risk assessment of invasive flaviviruses.recently, the distribution of japanese encephalitis virus (jev) and west nile virus (wnv) has expanded into new territories. the invasion of wnv into japan is of great concern. the migration of birds is suggested to be involved in the expanded distribution of these flaviviruses. in this study, 92 wild ducks--20 anas poecilorhyncha (migratory breeders), 50 anas platyrhynchos (undetermined), 16 anas acuta (winter visitors), and 6 anas penelope (winter visitors)--were captured in autumn of 2005 and ...200919514809
metal levels in livers of waterfowl from korea.this study presents concentrations of heavy metals (iron, zinc, manganese, copper, lead and cadmium) in livers of white-fronted geese (anser albifrons), eurasian wigeons (anas penelope), mallards (anas platyrhynchos) and spot-billed ducks (anas poecilorhyncha) from korea in february 2006 and 2008. iron concentrations were significantly lower in spot-billed ducks than in other species (anova, p<0.001). zinc concentrations were greater in white-fronted geese and spot-billed ducks than in eurasian ...201122177482
Serosurveillance for Japanese encephalitis virus in wild birds captured in Korea.Climate change induced by recent global warming may have a significant impact on vector-borne and zoonotic diseases. For example, the distribution of Japanese encephalitis virus (JEV) has expanded into new regions. We surveyed the levels of hemagglutination-inhibition (HI) antibodies against JEV (Family Flaviviridae, genus Flavivirus) in wild birds captured in Korea. Blood samples were collected from 1,316 wild birds including the following migratory birds: Oceanodroma castro (n = 4), Anas formo ...201122122903
occurrence of avian botulism in korea during the period from june to september 2012.botulism is a paralytic disease caused by the botulinum neurotoxin produced by clostridium botulinum. in the summer season in korea, intensive outbreaks of avian botulism were reported in both poultry and wild birds, including five korean native chicken farms (hanhyup no.3), one pheasant (phasianus colchicus karpowi) farm, and one community of spot-billed ducks (anas poecilorhyncha). the affected domestic birds showed 24.5% to 58.3% mortality, with specific clinical signs including ataxia, limbe ...201425619016
surveillance and characterization of riemerella anatipestifer from wild birds in south korea.we conducted surveillance for riemerella anatipestifer (ra) in wild birds along the east asian-australasian flyway in south korea. detected ra were characterized by serotype, antibiotic susceptibility, and sequence analysis of the 16s rrna gene. we collected 944 wild birds of 34 species from 19 of south korea's major migratory wild bird habitats between 2011 and 2012. we identified ra by pcr and rrna gene sequence in 71/102 (69.6%) pharyngeal swabs and 19/944 (2.0%) cloacal swabs of wild birds. ...201525588012
effect of embedded shot on trace element concentrations in livers of anseriformes species.trace elements were analyzed in the liver of white-fronted geese (anser albifrons, n=15), mallards (anas platyrhynchos, n=4) and spot-billed ducks (anas poecilorhyncha, n=13) found dead in gimpo, korea. all mallards and eight spot-billed ducks had embedded lead shot. embedded shot could be affected elevated trace element concentrations on geese and ducks. element concentrations of cadmium (cd), lead (pb), chromium (cr), aluminum (al), copper (cr), manganese (mn) and zinc (zn) differed among spec ...201627584822
concentration of trace elements in feathers of waterfowl, korea.cadmium (cd), lead (pb), chromium (cr), copper (cu), manganese (mn), zinc (zn), and iron (fe) were analyzed in the breast feather of white-fronted geese (anser albifrons, n = 15), mallards (anas platyrhynchos, n = 4), and spot-billed ducks (anas poecilorhyncha, n = 13) found dead in gimpo, korea. all of the mallards and eight of the 13 spot-billed ducks had embedded shot. concentrations of pb, cr, cu, mn, zn, and fe were significantly different among waterfowl species. mallards with embedded sho ...201425208517
the complete mitochondrial genome of anas poecilorhyncha (anatidae: anas).the mitochondrial genome of anas poecilorhyncha (anatidae: anas) is a circular molecule of 16,608 bp in length, containing 13 protein-coding genes, 2 ribosomal rna genes, 22 transfer rna genes and 1 control region (d-loop). overall base composition of the complete mitochondrial dna was 29.17% a, 22.21% t, 32.81% c and 15.81% g.201524021013
tissue distribution of metals in white-fronted geese and spot-billed ducks from korea.this study presents concentrations of fe, zn, mn, cu, pb and cd in livers, kidneys, muscles and bones of white-fronted geese anser albifrons (geese) and spot-billed ducks anas poecilorhyncha (ducks). iron in livers, kidneys and muscles, zn in muscles, mn and cd in every tissue, cu in livers, muscles and bones and pb in bones differed between species, and there were significant differences among tissues in both species. essential elements such as fe, zn, mn and cu concentrations were within the b ...201323689931
on a new trematode echinoparyphium bagulai sp.nov., (echinostomatidae) from anas poecilorhyncha. 196113789208
Displaying items 1 - 13 of 13