| 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 |
| [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 |
| ultrastructural study of the keratinization of the dorsal epithelium of the tongue of middendorff's bean goose, anser fabalis middendorffii (anseres, antidae). | comparative studies of ultrastructural features of tongues allow deductions to be made about relationships between structure and function, as reflected by an animal's feeding habits. the present study was performed to serve as a basis for further studies of avian feeding mechanisms and of relationships between the fine structure of the lingual epithelium and the development of the expression of keratins. | 1997 | 9025994 |
| over a thousand years of evolutionary history of domestic geese from russian archaeological sites, analysed using ancient dna. | the european domestic goose is a widely farmed species known to have descended from the wild greylag goose (anser anser). however, the evolutionary history of this domesticate is still poorly known. ancient dna studies have been useful for many species, but there has been little such work on geese. we have studied temporal genetic variation among domestic goose specimens excavated from russian archaeological sites (4th⁻18th centuries) using a 204 base pair fragment of the mitochondrial control r ... | 2018 | 30037043 |
| spatial, temporal, and species variation in prevalence of influenza a viruses in wild migratory birds. | although extensive data exist on avian influenza in wild birds in north america, limited information is available from elsewhere, including europe. here, molecular diagnostic tools were employed for high-throughput surveillance of migratory birds, as an alternative to classical labor-intensive methods of virus isolation in eggs. this study included 36,809 samples from 323 bird species belonging to 18 orders, of which only 25 species of three orders were positive for influenza a virus. informatio ... | 2007 | 17500589 |
| 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 |
| 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 |
| [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 |
| 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 |
| genetic characterization of a novel north american-origin avian influenza a (h6n5) virus isolated from bean goose of south korea in 2018. | the complex overlap in waterfowl migratory pathways across the world has established numerous occurrences of genetic reassortment and intercontinental spread of avian influenza virus (aiv) over long distances, thereby calling for huge efforts and targeted surveillance for infection control. during annual surveillance in south korea in 2018, a novel avian influenza h6n5 (k6) subtype was isolated from the fecal sample of wild bird. genomic characterization using a phylogenetic tree indicated the k ... | 2020 | 32709116 |
| 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 |
| epidemic of wild-origin h1nx avian influenza viruses in anhui, china. | as the natural hosts of avian influenza viruses (aivs), aquatic and migratory birds provide a gene pool for genetic transfer among species and across species, forming transient "genome constellations." this work describes the phylogenetic dynamics of h1nx based on the complete molecular characterization of eight genes of viruses that were collected from 2014 to 2015 in anhui province, china. | 2017 | 28669354 |
| the complete mitochondrial genome of bean goose (anser fabalis) and implications for anseriformes taxonomy. | mitochondrial dna plays an important role in living organisms, and has been used as a powerful molecular marker in a variety of evolutionary studies. in this study, we determined the complete mtdna of bean goose (anser fabalis), which is 16,688 bp long and contains 13 protein-coding genes, 2 rrnas, 22 trnas and a control region. the arrangement is similar to that of typical anseriform species. all protein-coding genes, except for cyt b, nd5, coi, and coii, start with an atg codon. the atg start ... | 2013 | 23717412 |
| new h6 influenza virus reassortment strains isolated from anser fabalis in anhui province, china. | h6 subtype avian influenza viruses are globally distributed and, in recent years, have been isolated with increasing frequency from both domestic and wild bird species as well as infected humans. many reports have examined the viruses in the context of poultry or several wild bird species, but there is less information regarding their presence in migratory birds. | 2017 | 28222765 |
| 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 |
| experimental evidence shows the importance of behavioural plasticity and body size under competition in waterfowl. | when differently sized species feed on the same resources, interference competition may occur, which may negatively affect their food intake rate. it is expected that competition between species also alters behaviour and feeding patch selection. to assess these changes in behaviour and patch selection, we applied an experimental approach using captive birds of three differently sized anatidae species: wigeon (anas penelope) (~600 g), swan goose (anser cygnoides) (~2700 g) and bean goose (anser f ... | 2016 | 27727315 |
| 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 |
| 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 |
| [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 |
| 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 |
| first survey of the occurrence of duck enteritis virus (dev) in free-ranging polish water birds. | duck plague (dp) caused by anatid herpesvirus 1, also called duck enteritis virus (dev), presents one of the most important concerns in mass waterfowl production. apart from geese and ducks, free-ranging water birds are the most notorious infection carriers. the epidemiology of dev in western europe remains unknown. therefore, it was reasonable to conduct a study on its occurrence using modern but simple real-time loop-mediated isothermal amplification (lamp). analysis of 132 field isolates show ... | 2014 | 24327092 |
| complete genome sequence of a natural reassortant h9n2 avian influenza virus found in bean goose (anser fabalis): direct evidence for virus exchange between korea and china via wild birds. | in 2011, we isolated a natural recombinant h9n2 avian influenza virus from fecal droppings of bean goose (anser fabalis) in korea. phylogenetic analyses showed that the a/bean goose/korea/220/2011(h9n2) isolate is a reassortant of eurasian and north american lineages of avian influenza virus. in addition, the complete genome sequence, including all 8 gene segments, was associated with chinese h9n2 viruses isolated from wild birds in the hunan east dongting lake national nature reserve. these dat ... | 2014 | 24953505 |
| characterization of a reassortant h11n9 subtype avian influenza virus isolated from bean goose along the east asian-australian flyway. | during the surveillance of avian influenza viruses in the dongxi lake wetland of hubei in 2015-2016, an h11n9 avian influenza virus was isolated from a bean goose (anser fabalis). phylogenetic analysis showed that the ha gene of this isolate belongs to the north american lineage; however, the na and the internal genes of the isolate were generated from the eurasian lineage. this strain had reduced pathogenicity in mice and was capable of replication in the mouse lung without prior adaptation. th ... | 2017 | 27730427 |
| seasonal dynamics of wintering waterbirds in two shallow lakes along yangtze river in anhui province. | the shallow lake wetlands in the middle and lower yangtze river floodplain are important wintering and stopover habitats for migratory waterbirds on the east asia-australia flyway. with increasing fishery practices in recent years, however, the wetlands have deteriorated significantly and now threaten wintering waterbirds. to gain insight into the influence of deteriorating wetlands on waterbirds, we conducted a survey of wintering waterbird species, population size, and distribution across 11 b ... | 2011 | 22006808 |
| the role of aquatic birds in the environmental dissemination of human pathogenic giardia duodenalis cysts and cryptosporidium oocysts in hungary. | fecal samples were taken from 132 (103 wild and 29 domestic) aquatic birds on selected areas in hungary from february 2008 to march 2008. cryptosporidium oocysts and giardia cysts were purified from the samples and were viewed via fluorescent antibody staining. molecular detection tools, such as pcr-sequencing and loop mediated isothermal amplification (lamp) were used in order to determine the cryptosporidium species and giardia duodenalis assemblages present. all together 6 (5.8%) and 6 (5.8%) ... | 2009 | 19446039 |
| taxonomy of the bean goose-pink-footed goose. | the bean goose anser fabalis and the pink-footed goose a. brachyrhynchus breed in the tundra and taiga zones of eurasia and eastern greenland, and the taxonomy of the group based on morphology has been controversial. we investigated the phylogenetic relationships within the bean goose-the pink-footed goose complex using mitochondrial control region sequences of 199 individuals collected from the breeding areas in the palaearctic and eastern nearctic. we found three mitochondrial clades geographi ... | 2008 | 18550388 |
| 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 |
| molecular cytogenetic characterization of repetitive sequences comprising centromeric heterochromatin in three anseriformes species. | the highly repetitive dna sequence of centromeric heterochromatin is an effective molecular cytogenetic marker for investigating genomic compartmentalization between macrochromosomes and microchromosomes in birds. we isolated four repetitive sequence families of centromeric heterochromatin from three anseriformes species, viz., domestic duck (anas platyrhynchos, apl), bean goose (anser fabalis, afa), and whooper swan (cygnus cygnus, ccy), and characterized the sequences by molecular cytogenetic ... | 2019 | 30913221 |
| two novel reassortant h11n8 avian influenza viruses occur in wild birds found in east dongting lake, china. | during the surveillance of avian influenza viruses in east dongting lake, china (2014-2015), two h11n8 avian influenza viruses were detected in the bean goose (anser fabalis) and the falcated teal (anas falcata). phylogenetic analysis showed that these two novel reassortant h11n8 avian influenza viruses contain genes from poultry and wild birds. this is the first report detecting the h11n8 subtype influenza virus from wild birds in asia. these findings indicate a dissemination of avian influenza ... | 2019 | 30847609 |
| recent introgression between taiga bean goose and tundra bean goose results in a largely homogeneous landscape of genetic differentiation. | several studies have uncovered a highly heterogeneous landscape of genetic differentiation across the genomes of closely related species. specifically, genetic differentiation is often concentrated in particular genomic regions ("islands of differentiation") that might contain barrier loci contributing to reproductive isolation, whereas the rest of the genome is homogenized by introgression. alternatively, linked selection can produce differentiation islands in allopatry without introgression. w ... | 2020 | 32451423 |
| microstructure and compression resistance of bean goose (anser fabalis) feather shaft. | the bean goose anser fabalis, noted for its excellent flying ability, has feathers composed of keratinized products derived from epidermal cells, which play a crucial role in flight. the feather shaft is an important connective unit, made of a lightweight material, which also contributes to aiding flight. the shaft can withstand loads from different directions and has outstanding compression resistance. in this study, the microstructure and composition of the a. fabalis feather shaft were observ ... | 2020 | 31659818 |
| less is better. avoiding redundant measurements in studies on wild birds in accordance to the principles of the 3rs. | the principles of the 3rs apply to animal use in research regardless where the research is conducted. in wildlife research, particularly research on wild birds, 3r implementation lags behind research using laboratory, farm, or pet animals. raised 3r awareness and more field-adapted techniques and protocols are expected to improve the situation. unpredictable access to animals entices the wildlife researcher to make the most of each caught animal, leading to potential over-use, and violation of t ... | 2019 | 31275951 |
| making do with less: must sparse data preclude informed harvest strategies for european waterbirds? | the demography of many european waterbirds is not well understood because most countries have conducted little monitoring and assessment, and coordination among countries on waterbird management has little precedent. yet intergovernmental treaties now mandate the use of sustainable, adaptive harvest strategies, whose development is challenged by a paucity of demographic information. in this study, we explore how a combination of allometric relationships, fragmentary monitoring and research infor ... | 2018 | 29205644 |
| comparison of hemisphere size in wild and domestic geese. | the hemisphere size has been studied in wild and domestic geese (anser fabalis, n = 77: a. albifrons, n = 48; a. anser, n = 8; a. anser f. domestica, n = 10), which were classified according to particular age category (adult or immature). material used in studies was fixed in 4% solution of formaldehyde. the brain weight as well as hemispheres' length, width and height was measured with standard method. morphometric characteristic of geese's brains has been presented in absolute and relative way ... | 1997 | 9178574 |
| 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 |
| spring migration patterns, habitat use, and stopover site protection status for two declining waterfowl species wintering in china as revealed by satellite tracking. | east asian migratory waterfowl have greatly declined since the 1950s, especially the populations that winter in china. conservation is severely hampered by the lack of primary information about migration patterns and stopover sites. this study utilizes satellite tracking techniques and advanced spatial analyses to investigate spring migration of the greater white-fronted goose (anser albifrons) and tundra bean goose (anser serrirostris) wintering along the yangtze river floodplain. based on 24 t ... | 2018 | 29988414 |
| shifts in distribution of herbivorous geese relative to hydrological variation in east dongting lake wetland, china. | studies on distribution dynamics of waterbirds and the relation with hydrological changes are essential components of ecological researches. east dongting lake is a ramsar site and especially important wintering ground for herbivorous geese along the east asian-australasian flyway. in this paper, based on annual (2008/09-2016/17) waterbird census data, we investigated the spatial-temporal distributions of three herbivorous goose species (lesser white-fronted goose anser erythropus, bean goose an ... | 2018 | 29702400 |
| a preliminary analysis of the diet composition of overwintering bean geese (anser fabalis) and greater white-fronted geese (a. albifrons) in korea using pcr on fecal samples. | bean geese (anser fabalis) and greater white-fronted geese (anser albifrons) are the dominant wintering waterfowl in south korea. although they are commonly observed in estuaries and rice fields during the winter, the diet composition of the geese during the winter has rarely been studied. in this study, we provide the results from preliminary analyses on the diet of these two geese species overwintering in daebu island of south korea. we used a total of 13 fecal samples from bean geese (n = 4) ... | 2017 | 30460062 |