| detection of antibodies to alphaviruses and flaviviruses in some migratory birds of the danube delta. | data are reported on the presence of antibodies to some group a(alphavirus) b(flavivirus) arboviruses in 8 species of migratory birds (ardea cinerea, plegadis falcinellus, anas querquedula, anser albifrons, gavia arctica, fulica atra, larus minutes and and phalacrocorax corbo) of the danube delta. | 1978 | 676070 |
| fluoroacetamide (1081) oisoning in wild birds. | an outbreak of poisoning in four greylag geese (anser anser) and 35-45 teal (anas crecca) is described. laboratory findings led to the conclusion that a wheat bait containing the rodenticide fluoracetamide (1081) caused the poisoning. circumstantial evidence incriminated fluoracetamide as the cause of death in white-fronted geese (anser albifrons), mallards (anas platyrhynchos), and chukars (alectoris chukar). | 1975 | 1195498 |
| epizootic necrotic enteritis in wild geese. | outbreaks of a disease characterized by severe necrotic enteritis occurred among canada geese (branta canadensis), lesser snow geese (anser caerulescens), ross' geese (a. rossi), and white-fronted geese (a. albifrons) on lakes in saskatchewan and manitoba during the autumn of 1983, 1984 and 1985. ducks using the lakes were apparently not affected. lesions in the geese closely resembled those described in enteritides in other species associated with the proliferation of clostridium perfringens in ... | 1987 | 3625893 |
| serological investigations concerning the presence of antibodies to arboviruses in wild birds. | serum samples from 8 species of migratory birds (ardea cinerea, plegadis falcinellus, anas querquedula, anser albifrons, gavia arctica, fulica atra, phalacrocorax carbo, larus minutus) were tested for the presence of hemagglutination-inhibiting (hai) antibodies to alpha- and flaviviruses. hai antibodies to alphaviruses (eastern equine encephalitis, western equine encephalitis, sindbis, middelburg, semliki forest) ranging in titer from 1/20 to 1/160 were detected in 46 serum samples; 22 serum sam ... | 1984 | 6710861 |
| [hemoglobins, xlvii. hemoglobins of the bar-headed goose (anser indicus): primary structure and physiology of respiration, systematic and evolution]. | the primary structures of the alpha- and beta-chains of the main component of bar-headed goose (anser indicus) are given. by homologous comparison with the hemoglobin of the grey-lag goose (anser anser) 3 differences were found in the alpha-chains, 1 difference in the beta-chains. in position alpha 119 h2ala and beta 125 h3asp alpha 1 beta 2-contact points are changed. the mutation alpha 63 e12val brings a drastic change in tertiary structure of the alpha-chains of bar-headed goose: the helices ... | 1982 | 7106705 |
| [the aerobic bacterial intestinal flora of various wintering geese species]. | the aerobic fecal flora of wintering brent goos (branta bernicla), barnacle goose (branta leucopsis), greylag goose (anser anser), white-fronted goose (anser albifrons), pink-footed goose (anser brachyrhynchus), and bean goose (anser fabalis) was studied. there were no specific differences between the various geese. bacterial counts were in the range of 10(5)-10(7) cpu per gram of feces. neither pathogenic bacteria nor rotavirus could be detected in the fecal samples of the wintering geese, so t ... | 1982 | 7136353 |
| helminths of wintering geese in texas. | ten canada geese (branta canadensis), 24 snow geese (chen caerulescens) and 22 white-fronted geese (anser albifrons) from coastal texas (usa) were examined for helminths. three cestode, seven nematode, and three trematode species were collected. gizzard nematodes (amidostomum anseris, a. spatulatum and epomidiostomum crami) infected 53 of 54 birds. gross lesions were not attributed to helminth infections and the host population does not appear to be impaired by them. | 1997 | 9249720 |
| serological survey of viral pathogens in bean and white-fronted geese from germany. | sera from wild geese were tested for antibodies to selected viral pathogens at a resting site for wild waterfowl in germany. serum samples from both bean geese (anser fabalis) and white-fronted geese (anser albifrons) collected in october 1991 were examined using serological methods licensed for routine diagnosis in domestic poultry. of 130 sera tested, antibodies to several infectious agents were found including newcastle disease virus (45%), goose parvovirus (48%), avian reovirus (29%), and av ... | 1998 | 9706557 |
| a descriptive analysis of the potential association between migration patterns of bean and white-fronted geese and the occurrence of newcastle disease outbreaks in domestic birds. | the sightings and migration patterns of 65 bean (anser fabalis) and 65 white-fronted geese (anser albifrons) are reported. in the past, these geese were serologically screened for the occurrence of newcastle disease virus (ndv) and other avian viral diseases by hlinak et al. (3). of the 130 birds originally tagged and serologically screened in 1991, 53 birds were resighted between 1991 and 1996. most of the sightings were reported from main wintering and resting sites in germany and the netherla ... | 1999 | 10396646 |
| pcr-based typing of mycobacterium avium isolates in an epidemic among farmed lesser white-fronted geese (anser erythropus). | mycobacterium avium is an important veterinary pathogen causing avian tuberculosis in birds. the aim of the study was to evaluate the genetic relatedness in m. avium isolates from deep tissues of farmed lesser white-fronted geese with avian tuberculosis and in samples from the farm environment. the strains were analyzed by two pcr-based typing methods, inverted repeat (ir) typing and random amplified polymorphic dna (rapd) analysis. the primers for the inverted repeats of the insertion sequences ... | 2001 | 11356317 |
| [comparative study of the sensory system in gamasid mites rhinonyssus rhinolethrum, rh. subrhinolethrum and ptilonyssus motacillae (mesostigmata: gamasina: rhinonyssidae), parasites in the nasal cavity of birds]. | sensillae of the tarsal receptor complex, palpal organ, and body chaetom were examined by means of scanning electron microscopy in three endoparasitic gamasid mites: rhinonyssus rhinolethrum, rh. subrhinolethrum and ptilonyssus motacillae, the parasites of anser albifrons, anas crecca, and motacilla alba, respectively. in the tarsal sensory complex, the scale of reduction of the olfactory sensilla reflects the adaptation of gamasid mites to cavernous parasitism. the topography of this sensilla i ... | 2002 | 12481607 |
| isolation of myxoviruses from migratory waterfowls in san-in district, western japan in winters of 1997-2000. | between november 1997 and february 2000, winter migratory waterfowls of several species staying in san-in district, western japan were surveyed for influenza a virus and paramyxovirus at four stations. a total of 18 influenza a viruses was isolated from 1,404 fecal samples of whistling swans, pintails, mallards, and white-fronted geese. five different hemagglutinins and eight neuraminidases were identified in the viruses isolated, in 11 different combinations, including h7n8 related to a subtype ... | 2002 | 12499693 |
| two new avian mitochondrial genomes (penguin and goose) and a summary of bird and reptile mitogenomic features. | we report complete mitochondrial (mt) genomes for a penguin (little blue, eudyptula minor) and a goose (greater white-fronted, anser albifrons). a revised annotation of avian and reptile mt genomes has been carried out, which improves consistency of labeling gene start and stop positions. in conjunction with this, a summary of mt gene features is presented and a number of conserved patterns and interesting differences identified. the protein-coding genes from the two new genomes were analysed to ... | 2003 | 12527195 |
| avian cholera exposure and carriers in greater white-fronted geese breeding in alaska, usa. | we conducted a 3-yr study (2001-03) on greater white-fronted geese (anser albifrons frontalis) breeding in alaska, usa, to determine the exposure of this population to pasteurella multocida and the potential role of these birds as disease carriers. we tested sera from nearly 600 adult geese for antibodies to p. multocida serotype 1. we found a low prevalence (<5%) of positive antibodies in adult geese, and based on the short duration of detectable antibodies, these findings indicate recent infec ... | 2005 | 16244059 |
| [phylogenetic relationships among domestic goose breeds based on mitochondrial cytochrome b gene sequence variation]. | the mitochondrial cytochrome b (cyt b) gene of 17 breeds of domestic goose (2 in europe and 15 in china) was sequenced and compared with that of the representative of wild species anser albifrons. sequence analysis revealed that thirty-one variable sites and 4 different haplotypes were found among the 45 sequences examined, and nucleotide diversity and haplotype diversity were 0.0068 and 0.45, respectively. mutations of insertion/deletion were not found. across all sites,the abundance of g was l ... | 2005 | 16257902 |
| pasteurella anatipestifer as a cause of mortality in captive wild waterfowl. | an outbreak of pasteurella anatipestifer infection in young wild waterfowl at the niska waterfowl research center resulted in losses of approximately 100 blue and snow geese, one white-fronted goose, five mandarin ducks, one black duck and one wood duck. clinical signs included diarrhea, paralysis and tremors. gross lesions were fibrin deposits on serosal surfaces, hemorrhages on the epicardium, consolidation of the lungs, cloudy or flaky deposits on the air sacs, and dark, swollen spleens. micr ... | 1970 | 16512147 |
| sarcocystis sp. from white-fronted goose (anser albifrons): cyst morphology and life cycle studies. | an experiment was carried out using three cubs of the arctic fox (alopex lagopus). twenty-five-day-old cubs were infected by feeding them with the leg muscles of the white-fronted goose (anser albifrons) containing sarcocystis sp. (cyst type iii) cysts. under the light microscope, the cysts were ribbon-shaped up to 4 mm long and up to 750 microm wide. on the surface of the wall (up to 2.4 microm), they had teat- or finger-like villar protrusions. ultrastructurally, the cyst wall was a type-9 wit ... | 2006 | 16649036 |
| [sequence and structure analysis of mitochondrial trnapro and trnathr genes in domestic goose breeds]. | we report here the results of the sequence and structure analysis of mitochondrial trnapro and trnathr genes in domestic goose breeds by sequencing the mitochondrial dna from a total of 25 samples from 6 breeds of chinese geese and 2 breeds of domestic europe geese. sequences and the cloverleaf structure of trnapro (69 bp) and trnathr (68 bp) in domestic goose breeds were described and analysed they were compared amongst the three domestic goose breeds as well as between anseriformes (anser cygn ... | 2006 | 16818428 |
| detection of the virulent marek's disease virus genome from feather tips of wild geese in japan and the far east region of russia. | marek's disease (md) virus (mdv) is known to cause malignant lymphomas in chickens. in 2001, we first reported an md case in a white-fronted goose (anser albifrons) in japan. therefore, the prevalence of mdv in the wild geese was surveyed by nested pcr using feather-tip samples in japan and the far east region of russia, breeding habitats of geese migrating to japan. mdv was detected in about 30% of analyzed white-fronted geese. furthermore, by nucleotide sequence analysis, we confirmed that thi ... | 2007 | 17497232 |
| sarcocystis sp. from the goldeneye (bucephala clangula) and the mallard (anas platyrhynchos): cyst morphology and ribosomal dna analysis. | by light microscopy, cysts of sarcocystis sp. (cyst type i) from the goldeneye (bucephala clangula) seemed filamentous with a smooth and thin (<1 microm) cyst wall. ultrastructurally, the cyst wall surface was irregular with minute undulations of the primary cyst wall. these sarcocysts had type-1 cyst wall. cystozoites were banana-shaped and measured 7.0-8.5 microm in length. by light microscopy, cysts of sarcocystis sp. (cyst type ii) from the mallard (anas platyrhynchos) were ribbon-shaped, ve ... | 2008 | 18084777 |
| serological survey of toxoplasma gondii in wild waterfowl in chukotka, kamchatka, russia and hokkaido, japan. | antibodies to toxoplasma gondii were assayed by elisa in 22 experimentally inoculated domestic ducks. in addition, a serological assay was carried out at obihiro, hokkaido, japan, in 2004 and 2005, on 221 wild ducks of 5 species: anas platyrhynchus (n = 111); a. poecilorhyncha (n = 27); a. acuta (n = 58); a. penelope (n = 16); and a. crecca (n = 9). assays were also conducted using sera from 197 wild geese of 2 species, i.e., anser albifrons (n = 162) and ans. fabalis (n = 35). birds were collec ... | 2008 | 18576786 |
| very virulent infectious bursal disease virus isolated from wild birds in korea: epidemiological implications. | to explore the epidemiological link between infectious bursal disease virus (ibdv) in wild birds and domestic chickens in korea, we examined 107 free-living wild birds, representing 7 species, that were found dead of apparent natural causes in korea over the past two years for the presence of ibdv. five birds were tested positive for ibdv by rt-pcr assay: black-billed magpie (n=1), mallard duck (n=2), bean goose (n=1) and white-fronted goose (n=1). ibdv was isolated from rt-pcr-positive tissues ... | 2008 | 18652855 |
| sarcocystis in the birds family corvidae with description of sarcocystis cornixi sp. nov. from the hooded crow (corvus cornix). | having studied 67 birds of six species of the family corvidae, sarcocystis cysts were found in 16 (23.9%) individuals belonging to three species. the highest prevalence of infection (35.9%) was determined in the hooded crow (corvus cornix). two types of sarcocysts, which were temporarily called cysts type i and type v, were determined in the corvids examined. by light microscope, type i cyst wall seemed to be thin (< 1.0 microm) and smooth. banana shaped cystozoites measured 6.0-8.0 microm in le ... | 2009 | 18855013 |
| [monitoring influenza a virus and newcastle disease virus in migratory waterfowls in sanjiang natural reserve of heilongjiang province]. | in order to monitor the present situation of avian influenza virus (aiv) and newcastle disease virus (ndv) in migratory waterfowls effectively, 158 tracheal and cloacal swab samples for wild birds were collected from sanjiang natural reserve during migratory seasons in october 2005, april 2006 and october 2006. | 2008 | 19160826 |
| meningoencephalitis associated with sarcocystis spp. in a free-living japanese raccoon dog (nyctereutes procyonoides viverrinus). | a free-living, young adult, male japanese raccoon dog (nyctereutes procyonoides viverrinus) was rescued in gifu, japan in march 2009. the animal was weak and emaciated with neurological signs that included head tilt, tremor and tic. the brain showed no gross abnormality at necropsy, but microscopically there was severe meningoencephalitis associated with protozoa, which were morphologically consistent with the asexual developmental stage of sarcocystis spp. the protozoa were immunohistochemicall ... | 2010 | 20163802 |
| dynamics and ecological consequences of avian influenza virus infection in greater white-fronted geese in their winter staging areas. | recent outbreaks of highly pathogenic avian influenza (hpai) in poultry have raised interest in the interplay between avian influenza (ai) viruses and their wild hosts. studies linking virus ecology to host ecology are still scarce, particularly for non-duck species. here, we link capture-resighting data of greater white-fronted geese anser albifrons albifrons with the ai virus infection data collected during capture in the netherlands in four consecutive winters. we ask what factors are related ... | 2010 | 20200028 |
| waterfowl ecology and avian influenza in california: do host traits inform us about viral occurrence? | we examined whether host traits influenced the occurrence of avian influenza virus (aiv) in anatidae (ducks, geese, swans) at wintering sites in california's central valley. in total, 3487 individuals were sampled at sacramento national wildlife refuge and conaway ranch duck club during the hunting season of 2007-08. of the 19 anatidae species sampled, prevalence was highest in the northern shoveler (5.09%), followed by the ring-necked duck (2.63%), american wigeon (2.57%), bufflehead (2.50%), g ... | 2010 | 20521673 |
| mortality factors and lead contamination of wild birds from korea. | wild birds have frequently been found dead in their natural habitats, but little is known about what ecological stressors may impact health of wild populations. here, we report the potentially harmful lead (pb) levels in tissues along with necropsies on 69 individuals of cranes, raptors, and waterfowl found dead between 2000 and 2003 in korea. in all samples diagnosed, trauma (n = 22), severe emaciation (n = 15), and infectious diseases (n = 11) were identified. in the survey, injury with pb sho ... | 2010 | 20824331 |
| description of sarcocystis anasi sp. nov. and sarcocystis albifronsi sp. nov. in birds of the order anseriformes. | on the basis of the already published morphological, 18s rdna, 28s rdna data (kutkiene et al., parasitol res 99:562-565, 2006; parasitol res 102:691-696, 2008; parasitol res 104:329-336, 2009), and its-1 region investigation results of sarcocysts presented in this paper, sarcocystis albifronsi sp. nov. from the white-fronted goose (anser albifrons) and sarcocystis anasi sp. nov. from the mallard duck (anas platyrhynchos) are described. | 2011 | 21845412 |
| Backtracking the movements of a migratory bird: a case study of a white-fronted goose (Anser albifrons). | The occurrence of avian influenza has brought attention to migrating birds and their migratory routes as possible carriers and gates, respectively, of the pathogenic influenza virus. There is a need to verify migration routes and to back-track the migration routes of infected animals. Stable isotope analysis of bird feathers is a valuable tool for studying the migratory pattern of birds, by gaining information about the environmental conditions during the growth of the feathers. Ideally, if diff ... | 2011 | 21953970 |
| 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 ... | 2011 | 22177482 |
| surveillance of marek's disease virus in migratory and sedentary birds in hokkaido, japan. | marek's disease virus serotype 1 (mdv-1) strains cause malignant lymphoma in chickens. mdv-1 has been previously reported to be widespread in white-fronted geese (anser albifrons); however, the prevalence of mdv-1 in other wild birds has not been determined. in this study, we investigated the prevalence of mdv-1 in various wild birds in hokkaido, japan. the mdv-1 genome was widespread in geese and ducks, but was not detected in other birds. mdv-1 was detected in both sedentary and migratory spec ... | 2011 | 21908212 |
| avian influenza virus wild bird surveillance in the azov and black sea regions of ukraine (2010-2011). | the azov and black sea basins are part of the transcontinental wild bird migration routes from northern asia and europe to the mediterranean, africa, and southwest asia. these regions constitute an area of transit, stops during migration, and nesting for many different bird species. from september 2010 to september 2011, a wild bird surveillance study was conducted in these regions to identify avian influenza viruses. biological samples consisting of cloacal and tracheal swabs and fecal samples ... | 2012 | 23402128 |
| draft genome sequence of a taxonomically unique neisseria strain isolated from a greater white-fronted goose (anser albifrons) egg on the north slope of alaska. | we report here the draft genome sequence of a unique neisseria strain that was isolated from a greater white-fronted goose (anser albifrons) egg. the sequencing was performed with an illumina miseq system, and the sequence consists of 275 contigs. the total genome is 2,397,978 bp long and has a g+c content of 46.4%. | 2015 | 26184936 |
| microbial infections are associated with embryo mortality in arctic-nesting geese. | to address the role of bacterial infection in hatching failure of wild geese, we monitored embryo development in a breeding population of greater white-fronted geese (anser albifrons) on the arctic coastal plain of alaska. during 2013, we observed mortality of normally developing embryos and collected 36 addled eggs for analysis. we also collected 17 infertile eggs for comparison. using standard culture methods and gene sequencing to identify bacteria within collected eggs, we identified a poten ... | 2015 | 26048928 |
| conditions during adulthood affect cohort-specific reproductive success in an arctic-nesting goose population. | variation in fitness between individuals in populations may be attributed to differing environmental conditions experienced among birth (or hatch) years (i.e., between cohorts). in this study, we tested whether cohort fitness could also be explained by environmental conditions experienced in years post-hatch, using 736 lifelong resighting histories of greenland white-fronted geese (anser albifrons flavirostris) marked in their first winter. specifically, we tested whether variation in age at fir ... | 2016 | 27257539 |
| a family-wide rt-pcr assay for detection of paramyxoviruses and application to a large-scale surveillance study. | family-wide molecular diagnostic assays are valuable tools for initial identification of viruses during outbreaks and to limit costs of surveillance studies. recent discoveries of paramyxoviruses have called for such assay that is able to detect all known and unknown paramyxoviruses in one round of pcr amplification. we have developed a rt-pcr assay consisting of a single degenerate primer set, able to detect all members of the paramyxoviridae family including all virus genera within the subfami ... | 2012 | 22496880 |
| wild bird surveillance for avian paramyxoviruses in the azov-black sea region of ukraine (2006 to 2011) reveals epidemiological connections with europe and africa. | despite the existence of 10 avian paramyxovirus (apmv) serotypes, very little is known about the distribution, host species, and ecological factors affecting virus transmission. to better understand the relationship among these factors, we conducted apmv wild bird surveillance in regions of ukraine suspected of being intercontinental (north to south and east to west) flyways. surveillance for apmv was conducted in 6,735 wild birds representing 86 species and 8 different orders during 2006 to 201 ... | 2014 | 24973063 |
| ctx-m-15-type extended-spectrum beta-lactamases-producing escherichia coli from wild birds in germany. | the isolation of escherichia coli from wild birds in germany revealed the occurrence of four ctx-m-15-producing strains from four different birds (2.3% of 172 isolates). ctx-m producers were recovered from two eurasian blackbirds, one rock pigeon and a greater white-fronted goose. all ctx-m-producing e. coli revealed a clonal relationship as determined by pulsed-field gel electrophoresis (pfge) and were assigned to multilocus sequence type (st) 648. our findings suggest the emergence of a new cl ... | 2010 | 23766249 |
| h9n2 influenza a virus isolated from a greater white-fronted wild goose (anser albifrons) in alaska has a mutation in the pb2 gene, which is associated with pathogenicity in human pandemic 2009 h1n1. | we report here the genomic sequence of an h9n2 influenza a virus [a/greater white-fronted goose/alaska/81081/2008 (h9n2)]. this virus shares ≥99.8% identity with a previously reported virus. both strains contain a g590s mutation in the polymerase basic 2 (pb2) gene, which is a pathogenicity marker in the pandemic 2009 h1n1 virus when combined with r591. | 2016 | 27587808 |
| complete genome sequence of a natural recombinant h9n2 influenza virus isolated from a white-fronted goose (anser albifrons) in south korea. | in 2007, we isolated a natural recombinant h9n2 avian influenza virus (aiv) from the fecal droppings of a white-fronted goose (anser albifrons) in south korea. phylogenetic analyses of the complete genome sequence showed that polymerase acidic (pa) and neuraminidase (na) genes belonged to the eurasian lineage aiv, but polymerase basic 2 (pb2), pb1, hemagglutinin (ha), nucleoprotein (np), matrix (m), and nonstructural (ns) genes belonged to the north-american lineage aiv. these data are beneficia ... | 2013 | 23704172 |
| helminth community structure in two species of arctic-breeding waterfowl. | climate change is occurring rapidly at high latitudes, and subsequent changes in parasite communities may have implications for hosts including wildlife and humans. waterfowl, in particular, harbor numerous parasites and may facilitate parasite movement across broad geographic areas due to migratory movements. however, little is known about helminth community structure of waterfowl at northern latitudes. we investigated the helminth communities of two avian herbivores that breed at high latitude ... | 2016 | 27709067 |
| [effects of environmental factors on the distribution of dominant wintering waterfowl species in east dongting lake wetland, south-central china]. | east dongting lake is one of the national nature reserves in china, and an important habitat for the wintering of waterfowls in china, and even, global wetlands. to study the relationships between waterfowl community and environmental factors is of vital significance in providing useful data and necessary information for the restoration of bird habitat. in the winters of 2010 and 2011, a survey was conducted on the wintering waterfowls in east dongting lake wetland, and canonical correspondence ... | 2013 | 23705401 |
| 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 ... | 2016 | 27584822 |
| 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 ... | 2014 | 25208517 |
| assessment of lead exposure in waterfowl species, korea. | lead concentrations were analyzed in white-fronted geese (anser albifrons, n = 15), mallards (anas platyrhynchos, n = 4), and spot-billed ducks (a. poecilorhyncha, n = 13) found dead near gimpo, korea, to determine tissue- and species-specific lead concentration differences and to assess the effect of embedded lead shot. in livers, kidneys, and bones (tarsus), mallards and spot-billed ducks with embedded shot had greater lead concentrations than white-fronted geese and spot-billed ducks without ... | 2014 | 24854704 |
| 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 ... | 2013 | 23689931 |
| reconciling competing values placed upon goose populations: the evolution of and experiences from the islay sustainable goose management strategy. | the scottish island of islay hosts 45 000 barnacle geese branta leucopsis (56% of the greenland barnacle goose population, plus those passing through on migration), 5000 greenland white-fronted geese anser albifrons flavirostris (up to 30% of the world population) and 2500 greylag geese anser anser, most of which feed on 9000 ha of grassland. the financial impacts of estimated agricultural damage have risen greatly over the past 20 years due to increasing goose numbers and higher farming costs. ... | 2017 | 28215016 |
| neisseria arctica sp. nov. isolated from nonviable eggs of greater white-fronted geese (anser albifrons) in arctic alaska. | during the summers of 2013 and 2014, isolates of a novel gram-negative coccus in the neisseria genus were obtained from the contents of nonviable greater white-fronted goose (anser albifrons) eggs on the arctic coastal plain of alaska. we used a polyphasic approach to determine whether these isolates represent a novel species. 16s rrna gene sequences, 23s rrna gene sequences, and chaperonin 60 gene sequences suggested that these alaskan isolates are members of a distinct species that is most clo ... | 2017 | 28056218 |
| risk assessment of lead poisoning and pesticide exposure in the declining population of red-breasted goose (branta ruficollis) wintering in eastern europe. | the red-breasted goose branta ruficollis is a globally threatened species (iucn vulnerable) and the only european goose species currently in decline. working on the wintering grounds on the black sea coast, we address two potential causes of decline of this species for the first time: lead poisoning, and contamination from pesticides. we quantified the densities of spent pb shot in three wetlands used by the geese in north-east bulgaria, and analysed the pb concentration in the faeces of red-bre ... | 2016 | 27529395 |
| selection of a marker gene to construct a reference library for wetland plants, and the application of metabarcoding to analyze the diet of wintering herbivorous waterbirds. | food availability and diet selection are important factors influencing the abundance and distribution of wild waterbirds. in order to better understand changes in waterbird population, it is essential to figure out what they feed on. however, analyzing their diet could be difficult and inefficient using traditional methods such as microhistologic observation. here, we addressed this gap of knowledge by investigating the diet of greater white-fronted goose anser albifrons and bean goose anser fab ... | 2016 | 27602302 |
| [variability of the mtdna control region in goose anser albifrons scopoli, 1769]. | sequence variation of the mtdna (d loop) control region was examined in greater white-fronted goose anser albifrons scopoli, 1769 individuals (n = 71). the obtained sequences were compared with those from the ncbi genbank database. the high level of similarity of the sample from primorye (a. albifrons) with the sample from japan (a. a. frontalis) at the level of molecular variation, genetic distance, phylogenetic reconstruction, and haplotype network was demonstrated. a hypothesis on the ways of ... | 2016 | 27281856 |
| complete genome sequence of a novel avian paramyxovirus (apmv-13) isolated from a wild bird in kazakhstan. | a novel avian paramyxovirus was identified during annual viral surveillance of wild bird populations in kazakhstan in 2013. the virus was isolated from a white fronted goose (anser albifrons) in northern kazakhstan. here, we report the complete genome sequence of the isolate, which we suggest should constitute a novel serotype. | 2016 | 27198008 |
| surveillance for eurasian-origin and intercontinental reassortant highly pathogenic influenza a viruses in alaska, spring and summer 2015. | eurasian-origin and intercontinental reassortant highly pathogenic (hp) influenza a viruses (iavs) were first detected in north america in wild, captive, and domestic birds during november-december 2014. detections of hp viruses in wild birds in the contiguous united states and southern canadian provinces continued into winter and spring of 2015 raising concerns that migratory birds could potentially disperse viruses to more northerly breeding areas where they could be maintained to eventually s ... | 2016 | 27036114 |
| should i stay or should i go? fitness costs and benefits of prolonged parent-offspring and sibling-sibling associations in an arctic-nesting goose population. | theory predicts persistence of long-term family relationships in vertebrates will occur until perceived fitness costs exceed benefits to either parents or offspring. we examined whether increased breeding probability and survival were associated with prolonged parent-offspring and sibling-sibling relationships in a long-lived arctic migrant herbivore, the greenland white-fronted goose (anser albifrons flavirostris). although offspring associated with parents for 1-13 years, 79 % of these associa ... | 2016 | 26995680 |
| correction for hansen et al., draft genome sequence of a taxonomically unique neisseria strain isolated from a greater white-fronted goose (anser albifrons) egg on the north slope of alaska. | | 2016 | 26868411 |
| integrated population modelling reveals a perceived source to be a cryptic sink. | demographic links among fragmented populations are commonly studied as source-sink dynamics, whereby source populations exhibit net recruitment and net emigration, while sinks suffer net mortality but enjoy net immigration. it is commonly assumed that large, persistent aggregations of individuals must be sources, but this ignores the possibility that they are sinks instead, buoyed demographically by immigration. we tested this assumption using bayesian integrated population modelling of greenlan ... | 2016 | 26717445 |
| lesser white-fronted (anser erythropus) and greater white-fronted (a. albifrons) geese wintering in greek wetlands are not threatened by pb through shot ingestion. | fecal lead (pb) levels were investigated in the threatened european population of the lesser white-fronted goose (lwfg, anser erythropus) and of the non-threatened greater white-fronted goose (gwfg, anser albifrons) wintering in two wetland areas in northern greece in order to assess the potential risk from pb exposure. fecal, soil and food plant samples were analyzed. levels of pb were normalized using al concentrations in order to separate the effect of possible ingestion of pb shot from that ... | 2015 | 25965041 |
| microsatellite marker discovery using single molecule real-time circular consensus sequencing on the pacific biosciences rs. | microsatellite sequences are important markers for population genetics studies. in the past, the development of adequate microsatellite primers has been cumbersome. however with the advent of next-generation sequencing technologies, marker identification in genomes of non-model species has been greatly simplified. here we describe microsatellite discovery on a pacific biosciences single molecule real-time sequencer. for the greater white-fronted goose (anser albifrons), we identified 316 microsa ... | 2013 | 24215640 |
| [genetic diversity of anser albifrons scopoli, 1769 and anser fabalis latham, 1787 in the russian far east]. | using rapd pcr analysis and sequencing of the 5' end segment of the mtdna control region, the genetic diversity and differentiation of far eastern populations of greater white-fronted goose anser albifrons scopoli, 1769 and bean goose anser fabalis latham, 1787 were examined. based on rapd pcr data, the level of gene diversity (h) for a. albifrons (0.3634) and a. fabalis (0.3899) was calculated. sequence data showed considerably higher level of inter-population diversity in a. fabalis (26.4%), c ... | 2013 | 23866626 |
| misunderstanding the ‘‘nature’’ of co-management: a geography of regulatory science and indigenous knowledges (ik). | governments, ngos, and natural scientists have increased research and policy-making collaborations with indigenous peoples for governing natural resources, including official co-management regimes. however, there is continuing dissatisfaction with such collaborations, and calls for better communication and mutual learning to create more ‘‘adaptive’’ co-management regimes. this, however, requires that both western and indigenous knowledge systems be equal participants in the ‘‘co-production’’ of ... | 2013 | 23797486 |
| evidence that life history characteristics of wild birds influence infection and exposure to influenza a viruses. | we report on life history characteristics, temporal, and age-related effects influencing the frequency of occurrence of avian influenza (ai) viruses in four species of migratory geese breeding on the yukon-kuskokwim delta, alaska. emperor geese (chen canagica), cackling geese (branta hutchinsii), greater white-fronted geese (anser albifrons), and black brant (branta bernicla), were all tested for active infection of ai viruses upon arrival in early may, during nesting in june, and while molting ... | 2013 | 23469210 |
| molecular tools for species and sex identification in the mixed-species flocks of bean geese and white-fronted geese. | genetic studies on protected species can be difficult, particularly when they form a mixed-species flock with other species. the bean goose (anser fabalis), which is internationally recognized as a threatened species, was observed to form overwintering foraging flocks with white-fronted goose (anser albifrons) at agricultural lands to feed on the grains in korea. non-invasive samples such as feces and feather that are readily available in their foraging ground can be useful for understanding the ... | 2012 | 23106561 |
| the effects of simulated spring goose grazing on the growth rate and protein content of phleum pratense leaves. | the effects of simulated goose grazing on phleum pratense plants were tested in an iceland hayfield during the spring goose staging period (19 april-11 may 1997). plants in an area exclosed from the influence of grazing and the nutrient effects of goose faeces were subject to the removal of the youngest lamina once, three and four times during this period. clipping three and four times resulted in 25-41% increases in cumulative elongation of youngest laminae compared with unclipped plants. total ... | 1998 | 28308520 |
| pathomorphologic findings of lead poisoning in white-fronted geese (anser albifrons). | nineteen lead-poisoned white-fronted geese (anser albifrons), including nine immature birds, were examined pathologically. subacute lead poisoning due to ingestion of spent lead shots was diagnosed pathologically and confirmed by demonstrating high lead concentration in the liver. the liver lead concentration ranged from 6.9 to 67.7 mg/kg wet weight. the most suggestive gross lesions were mottled bile-stained liver in eight geese and proventricular impaction and/or the presence of lead pellets i ... | 1993 | 8116145 |
| treatment of lead poisoning in wild geese. | twenty-seven wild geese (anser albifrons) suffering from lead poisoning caused by ingestion of lead shot were treated with disodium calcium ethylenediaminetetraacetate. the concentration of lead in blood ranged from 0.4 to 23.0 micrograms/ml, with a mean concentration of 5.6 micrograms/ml. in 22 of the birds, 1 to 48 lead pellets (mean, 10.5 pellets/bird) were seen on radiographs of their gizzards. eleven of 27 birds recovered 3 to 8 weeks after the initiation of treatment. in the birds that rec ... | 1992 | 1624358 |
| multicentric intramuscular lipomatosis/fibromatosis in free-flying white-fronted and canada geese. | over a period of 9 yr, seven white-fronted geese (anser albifrons) and one canada goose (branta canadensis) with multiple intramuscular mesenchymal tumors were encountered in saskatchewan (canada) and one similarly affected canada goose was seen on prince edward island (canada). the tumors in these birds consisted either of adipose tissue, fibroblastic tissue, or a mixture of both types of tissues. the high prevalence of this condition in white-fronted geese suggested a genetic influence. | 1991 | 2023312 |
| studies on the helminth fauna of alaska. ix. the cestode parasites of the white-fronted goose (anser albifrons) with the description of hymenolepsis barrowensis n. sp. | | 1952 | 14928150 |
| concentration of iron, zinc, copper and lead in the brain of wild and domestic geese. | concentration of fe, zn, cu and pb were determined in the brain tissue of wild (bean goose, anser fabalis, n = 14, and white-fronted goose, a. albifrons, n = 3) and domestic (a. anser f. domestica, n = 13) geese. the results are referred to 1 g fresh weight (micrograms/g). out of 17 wild geese, 4 individuals showed a very high pb level. statistically significant differences in concentrations of the metals studied were found between the white-fronted and domestic geese; for 3 metals (fe, zn, cu), ... | 1994 | 8590898 |
| characterising the interspecific variations and convergence of gut microbiota in anseriformes herbivores at wintering areas. | microorganisms in vertebrate guts have been recognized as important symbionts influencing host life. however, it remains unclear about the gut microbiota in long-distance migratory anseriformes herbivores, which could be functionally important for these wetland-dependent animals. we collected faeces of the greater white-fronted goose (gwfg), bean goose (bg) and swan goose (sg) from shengjin lake (sjl) and poyang lake (pyl) in the yangtze river floodplain, china. high-throughput sequencing of 16s ... | 2016 | 27600170 |
| a method for heavy metal exposure risk assessment to migratory herbivorous birds and identification of priority pollutants/areas in wetlands. | wetlands are important habitats for migratory birds but have been degraded by many anthropogenic factors including heavy metal contamination. birds inhabiting wetlands are exposed to pollutants. in this study, a method for exposure risk assessment of migratory herbivorous birds and identification of priority pollutants/areas was developed and employed in east dongting lake wetland (edt). four heavy metals (cr, cu, pb, and cd) in sedge and soil samples from ten lesser white-fronted goose (anser e ... | 2016 | 26948971 |
| temporal increase in mtdna diversity in a declining population. | in small and declining populations levels of genetic variability are expected to be reduced due to effects of inbreeding and random genetic drift. as a result, both individual fitness and populations' adaptability can be compromised, and the probability of extinction increased. therefore, maintenance of genetic variability is a crucial goal in conservation biology. here we show that although the level of genetic variability in mtdna of the endangered fennoscandian lesser white-fronted goose anse ... | 2010 | 20497326 |
| dna fingerprinting of captive breeding pairs of lesser white-fronted geese (anser erythropus) with unknown pedigrees. | for a number of decades, the lesser white-fronted goose (anser erythropus) has been almost-absent from the fennoscandian fauna and has a current population size of only about 60 breeding pairs, with fewer than 10 pairs in sweden. during the period 1981-1991 more than 200 young have been reintroduced in northern sweden. however, the origin and possible relatedness of lesser white-fronted individuals were unknown when the breeding program started. we have used dna fingerprinting to assess the simi ... | 1996 | 8894050 |
| no evidence that migratory geese disperse avian influenza viruses from breeding to wintering ground. | low pathogenic avian influenza virus can mutate to a highly pathogenic strain that causes severe clinical signs in birds and humans. migratory waterfowl, especially ducks, are considered the main hosts of low pathogenic avian influenza virus, but the role of geese in dispersing the virus over long-distances is still unclear. we collected throat and cloaca samples from three goose species, bean goose (anser fabalis), barnacle goose (branta leucopsis) and greater white-fronted goose (anser albifro ... | 2017 | 28542340 |
| genetic structure among greater white-fronted goose populations of the pacific flyway. | an understanding of the genetic structure of populations in the wild is essential for long-term conservation and stewardship in the face of environmental change. knowledge of the present-day distribution of genetic lineages (phylogeography) of a species is especially important for organisms that are exploited or utilize habitats that may be jeopardized by human intervention, including climate change. here, we describe mitochondrial (mtdna) and nuclear genetic (microsatellite) diversity among thr ... | 2017 | 28479995 |
| complete genome sequence of an avian paramyxovirus representative of putative new serotype 13. | here, we report the complete genome sequence of a virus of a putative new serotype of avian paramyxovirus (apmv). the virus was isolated from a white-fronted goose in ukraine in 2011 and designated white-fronted goose/ukraine/askania-nova/48-15-02/2011. the genomic characterization of the isolate suggests that it represents the novel avian paramyxovirus group apmv 13. | 2016 | 27469958 |
| individual-area relationship best explains goose species density in wetlands. | explaining and predicting animal distributions is one of the fundamental objectives in ecology and conservation biology. animal habitat selection can be regulated by top-down and bottom-up processes, and is mediated by species interactions. species varying in body size respond differently to top-down and bottom-up determinants, and hence understanding these allometric responses to those determinants is important for conservation. in this study, using two differently sized goose species wintering ... | 2015 | 25996502 |
| an integrated model for assessing heavy metal exposure risk to migratory birds in wetland ecosystem: a case study in dongting lake wetland, china. | heavy metal contamination is present in wetland ecosystem worldwide, and quantitative risk assessment model is significant. in this study, an exposure model was integrated for assessing heavy metal exposure risk to migratory birds in dongting lake wetland (dtw). the concentrations of cr, cu, pb, cd, hg and as in water, plant, soil and fish were investigated from 9 migratory bird habitats. the results showed that exposure doses from drinking water pathways were very low. there was a sensitive are ... | 2015 | 25876031 |
| [white-fronted and bean geese breeding near snowy owls, peregrine falcons, and rough-legged buzzards at the taimyr peninsula]. | studies were carried out in 2000-2007 near medusa bay (73.21' n, 80.32' e) and along the agapa river (from 70 degrees 11', 86 degrees 15' e. down to the mouth 71 degrees 26' n, 89 degrees 13' e), in the northwestern and central parts of the taimyr peninsula. white-fronted goose nests are usually spread in the tundra or placed in 1-3 nest colonies near nests or staging points of snowy owls, peregrine falcons, or rough-legged buzzards. the intent of white-fronted geese to breed near birds of prey ... | 2016 | 20143637 |
| indirect effects of lemming cycles on sandpiper dynamics: 50 years of counts from southern sweden. | the bird-lemming hypothesis postulates that breeding success of tundra-nesting geese and waders in siberia follows the cyclic pattern of lemming populations, as a result of predators switching from lemmings to birds when the lemming population crashes. we present 50 years of data on constant-effort catches of red knot calidris canutus and curlew sandpiper c. ferruginea at an autumn migratory stopover site (ottenby) at the baltic sea, supplemented with literature data on winter censuses of dark-b ... | 2002 | 28547301 |
| recombinant goose circoviruses circulating in domesticated and wild geese in poland. | circoviruses are circular single-stranded dna (ssdna) viruses that infect a variety of animals, both domestic and wild. circovirus infection in birds is associated with immunosuppression and this in turn predisposes the infected animals to secondary infections that can lead to mortality. farmed geese (anser anser) in many parts of the world are infected with circoviruses. the majority of the current genomic information for goose circoviruses (gocvs) (n= 40) are from birds sampled in china and ta ... | 2018 | 29498637 |
| genomic analysis of a novel picornavirus from a migratory waterfowl, greater white-fronted goose (anser albifrons). | the complete genome of goose picornavirus 1 (gpv-1) strain goose/nlszk2/hun/2013 (mf358731) was determined by rt-pcr and next-generation sequencing from a cloacal sample of a migratory waterfowl, greater white-fronted goose (anser albifrons) in hungary. the genome of gpv-1 shows an l-3-3-4 organization pattern with a 5'-terminal origin of replication (ori) region, a type-iv ires, and an hbox/nc-type 2a protein. this virus showed the highest overall sequence identity to the members of the genus k ... | 2018 | 29288473 |
| next-generation sequencing of five new avian paramyxoviruses 8 isolates from kazakhstan indicates a low genetic evolution rate over four decades. | five avian paramyxoviruses of serotype 8 (apmv-8) were isolated during a study monitoring wild birds in kazakhstan in 2013 and each was further characterized. the viruses were isolated from three white-fronted geese (anser albifrons), one whooper swan (cygnus cygnus), and one little stint (calidris minuta). before our study, only two complete apmv-8 sequences had been reported worldwide since their discovery in the usa and japan in the 1970s. we report the complete genome sequences of the newly ... | 2018 | 29058150 |
| bioserotypes, virulence markers, and antimicrobial susceptibility of yersinia enterocolitica strains isolated from free-living birds. | the risk of meat contamination with yersinia enterocolitica poses a threat to consumers and persons who come into contact with bird carcasses. the occurrence of y. enterocolitica in the vast majority of migratory game species, the capercaillie, and the black grouse has never been studied in poland, europe, or in the world. the material for the study consisted of cloacal swabs obtained from 143 eurasian coots, 50 mallards, 30 pochards, 27 greylag geese, 22 white-fronted geese, 22 bean geese, 20 g ... | 2020 | 32258154 |
| potential reverse spillover of infectious bursal disease virus at the interface of commercial poultry and wild birds. | recently, multiple spillover events between domesticated poultry and wild birds have been reported for several avian viruses. this phenomenon highlights the importance of the livestock-wildlife interface in the possible emergence of novel viruses. the aim of the current study was to investigate the potential spillover and epidemiological links of infectious bursal disease virus (ibdv) between wild birds and domestic poultry. to this end, twenty-eight cloacal swabs were collected from four specie ... | 2020 | 32970296 |
| water level affects availability of optimal feeding habitats for threatened migratory waterbirds. | extensive ephemeral wetlands at poyang lake, created by dramatic seasonal changes in water level, constitute the main wintering site for migratory anatidae in china. reductions in wetland area during the last 15 years have led to proposals to build a poyang dam to retain high winter water levels within the lake. changing the natural hydrological system will affect waterbirds dependent on water level changes for food availability and accessibility. we tracked two goose species with different feed ... | 2017 | 29238566 |
| spring temperature, migration chronology, and nutrient allocation to eggs in three species of arctic-nesting geese: implications for resilience to climate warming. | the macronutrients that arctic herbivores invest in their offspring are derived from endogenous reserves of fat and protein (capital) that females build prior to the period of investment or from foods they consume concurrently with investment (income). the relative contribution from each source can be influenced by temporal and environmental constraints on a female's ability to forage on arctic breeding areas. warming temperatures and advancing arctic phenology may alter those constraints. from ... | 2018 | 30092605 |
| highly pathogenic and low pathogenic avian influenza h5 subtype viruses in wild birds in ukraine. | there have been three waves of highly pathogenic avian influenza (hpai) outbreaks in commercial, backyard poultry, and wild birds in ukraine. the first (2005-2006) and second (2008) waves were caused by h5n1 hpai virus, with 45 outbreaks among commercial poultry (chickens) and backyard fowl (chickens, ducks, and geese) in four regions of ukraine (ar crimea, kherson, odesa, and sumy oblast). h5n1 hpai viruses were isolated from dead wild birds: cormorants (phalacrocorax carbo) and great crested g ... | 2019 | 31713401 |
| highly pathogenic and low pathogenic avian influenza h5 subtype viruses in wild birds in ukraine. | there have been three waves of highly pathogenic avian influenza (hpai) outbreaks in commercial, backyard poultry, and wild birds in ukraine. the first (2005-2006) and second (2008) waves were caused by h5n1 hpai virus, with 45 outbreaks among commercial poultry (chickens) and backyard fowl (chickens, ducks, and geese) in four regions of ukraine (ar crimea, kherson, odesa, and sumy oblast). h5n1 hpai viruses were isolated from dead wild birds: cormorants (phalacrocorax carbo) and great crested g ... | 2019 | 31131580 |
| a periodic markov model to formalize animal migration on a network. | regular, long-distance migrations of thousands of animal species have consequences for the ecosystems that they visit, modifying trophic interactions and transporting many non-pathogenic and pathogenic organisms. the spatial structure and dynamic properties of animal migrations and population flyways largely determine those trophic and transport effects, but are yet poorly studied. as a basis, we propose a periodic markov model on the spatial migration network of breeding, stopover and wintering ... | 2018 | 30110431 |
| novel hpaiv h5n8 reassortant (clade 2.3.4.4b) detected in germany. | a novel h5n8 highly pathogenic avian influenza virus (hpaiv) was detected in a greater white-fronted goose in january 2020 in brandenburg, germany, and, in february 2020, in domestic chickens belonging to a smallholding in baden-wuerttemberg, germany. full-genome sequencing was conducted on the minion platform, enabling further phylogenetic analyses. the virus of clade 2.3.4.4b holds six segments from a eurasian/asian/african hpaiv h5n8 reassortant and two segments from low pathogenic avian infl ... | 2020 | 32143363 |
| the complete mitochondrial genome of eimeria anseris from the wintering greater white-fronted goose in shengjin lake, china, and phylogenetic relationships among eimeria species. | coccidiosis is recognized as one of the most widespread and pathogenic parasitic infections in migratory waterfowl throughout the world. it can be caused by several species of eimeria. we sequenced the complete mitochondrial genome (mtdna) of eimeria anseris from wintering greater white-fronted geese (anser albifrons) in china. the complete e. anseris mtdna is 6179 bp in size and contains three protein-coding genes (cyt b, coi, and coiii), 12 gene fragments for large subunit ribosomal rna (rrna) ... | 2019 | 30778751 |
| significant differences in bacterial and potentially pathogenic communities between sympatric hooded crane and greater white-fronted goose. | the gut microbiota of vertebrates play a crucial role in shaping the health of their hosts. however, knowledge of the avian intestinal microbiota has arguably lagged behind that of many other vertebrates. here, we examine the intestinal bacterial communities of the hooded crane and the greater white-fronted goose at the shengjin lake of china, using high-throughput sequencing (illumina mi-seq), and infer the potential pathogens associated with each species. intestinal bacterial alpha-diversity i ... | 2019 | 30804919 |
| population genomics reveals lack of greater white-fronted introgression into the swedish lesser white-fronted goose. | interspecific introgression is considered a potential threat to endangered taxa. one example where this has had a major impact on conservation policy is the lesser white-fronted goose (lwfg). after a dramatic decline in sweden, captive breeding birds were released between 1981-1999 with the aim to reinforce the population. however, the detection of greater white-fronted goose (gwfg) mitochondrial dna in the lwfg breeding stock led to the release program being dismantled, even though the presence ... | 2020 | 33110153 |
| reducing human pressure on farmland could rescue china's declining wintering geese. | while goose populations worldwide benefit from food provided by farmland, china's threatened wintering goose populations have failed to capitalize on farmland. it has been proposed that, due to an exceptionally intense human pressure on chinese farmland, geese cannot exploit farmland in their wintering sites and hence are confined to their deteriorating natural habitat. if this were true, locally decreasing this human pressure on farmland 'refuges' would represent a promising conservation measur ... | 2020 | 32832090 |
| hydrology-driven responses of herbivorous geese in relation to changes in food quantity and quality. | east dongting lake is a ramsar site and a particularly important wintering ground for herbivorous geese along the east asian-australasian flyway. the operation of the three gorges dam has changed the water regime and has a significant impact on wetland ecosystems downstream. we studied the responses of two sympatric herbivorous goose species, the lesser white-fronted goose anser erythropus and bean goose anser fabalis, to habitat change by investigating their food conditions, habitat selection, ... | 2020 | 32607151 |
| variations in gut bacterial communities between lesser white-fronted geese wintering at caizi and shengjin lakes in china. | the avian gut microbiota plays an important role in shaping the health of its host. however, knowledge of gut bacteria in birds lags behind that of other animals. in this study, we investigated the gut bacterial communities of lesser white-fronted geese (anser erythropus) wintering at shengjin lake and caizi lake, china, using high-throughput sequencing (illumina miseq). altogether, 1,053,624 high-quality sequences and 4,405 operational taxonomic units (otus) were acquired from 30 fecal samples ... | 2020 | 32207252 |
| flyway connectivity and exchange primarily driven by moult migration in geese. | for the conservation and management of migratory species that strongly decrease or increase due to anthropological impacts, a clear delineation of populations and quantification of possible mixing (migratory connectivity) is crucial. usually, population exchange in migratory species is only studied in breeding or wintering sites, but we considered the whole annual cycle in order to determine important stages and sites for population mixing in an arctic migrant. | 2019 | 30733867 |
| crucial sites and environmental variables for wintering migratory waterbird population distributions in the natural wetlands in east dongting lake, china. | dongting lake is the second largest freshwater lake in china and is one of the globally important wintering sites for migratory waterbirds in the east asian-australasian flyway. crucial sites and environmental variables for wintering migratory waterbirds are of great concern in the dongting lake wetlands. in this research, based on annual (2003/2004-2016/2017) waterbird and habitat census data, we recognized the crucial sites for waterbirds during wintering seasons by comparing the difference of ... | 2019 | 30469060 |
| flyway structure in the circumpolar greater white-fronted goose. | dispersal and migratory behavior are influential factors in determining how genetic diversity is distributed across the landscape. in migratory species, genetic structure can be promoted via several mechanisms including fidelity to distinct migratory routes. particularly within north america, waterfowl management units have been delineated according to distinct longitudinal migratory flyways supported by banding data and other direct evidence. the greater white-fronted goose (anser albifrons) is ... | 2018 | 30250718 |