| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| coupling modern portfolio theory and marxan enhances the efficiency of lesser white-fronted goose's (anser erythropus) habitat conservation. | climate change and human activities cause uncertain changes to species biodiversity by altering their habitat. the uncertainty of climate change requires planners to balance the benefit and cost of making conservation plan. here optimal protection approach for lesser white-fronted goose (lwfg) by coupling modern portfolio theory (mpt) and marxan selection were proposed. mpt was used to provide suggested weights of investment for protected area (pa) and reduce the influence of climatic uncertaint ... | 2018 | 29317759 |