Literature type: Scientific
Journal: Biological conservation
Volume: 141 , Pages: 2301-2309.
DOI: 10.1016/j.biocon.2008.06.022
Language:
English
Full reference: Cao, L., Barter, M. & Lei, G. 2008. New Anatidae population estimates for eastern China: Implications for current flyway estimates. Biological conservation 141: 2301-2309. https://www.dx.doi.org/10.1016/j.biocon.2008.06.022
Keywords: Anatidae, China, East Asia, Population estimate, Yangtze
Abstract:
Soundly-based conservation plans for Anatidae require abundance and distributional data to provide accurate estimation of population sizes and trends and to identify key sites for protection. Here, we report the first ever extensive surveys throughout eastern China’s wetlands for Anatidae, 80% of which occurred in the Yangtze floodplain. Population estimates for 24 species with sufficient data are provided, allowing assessment of the accuracy of current flyway population estimates; fourteen species are far less numerous than previously believed and three far more numerous. Further improvement of the population estimates for eastern China will need coordinated counts across the region requiring a large, skilled counter network.
Literature type: Scientific
Journal: Conservation Genetics
Volume: 8 , Pages: 197-207.
DOI: 10.1007/s10592-006-9162-5
Language:
English
Full reference: Ruokonen, M., Andersson, A.-C. & Tegelström, H. 2007. Using historical captive stocks in conservation. The case of the lesser white-fronted goose. Conservation Genetics 8: 197-207. https://www.dx.doi.org/10.1007/s10592-006-9162-5
Keywords: Hybrid, Captive, Supplementation, Reintroduction, Lesser white-fronted goose, Anser erythropus
Abstract:
Many captive stocks of economically or otherwise valuable species were established before the decline of the wild population. These stocks are potentially valuable sources of genetic variability, but their taxonomic identity and actual value is often uncertain. We studied the genetics of captive stocks of the threatened lesser white-fronted goose Anser erythropus maintained in Sweden and elsewhere in Europe. Analyses of mtDNA and nuclear microsatellite markers revealed that 36% of the individuals had a hybrid ancestry. Because the parental species are closely related it is unlikely that our analyses detected all hybrid individuals in the material. Because no ancestral polymorphism or introgression was observed in samples of wild populations, it is likely that the observed hybridisation has occurred in captivity. As a consequence of founder effect, drift and hybridisation, captive stocks were genetically differentiated from the wild populations of the lesser white-fronted goose. The high level of genetic diversity in the captive stocks is explained at least partially by hybridisation. The present captive stocks of the lesser white-fronted goose are considered unsuitable for further reintroduction, or supplementation: hybridisation has involved three species, the number of hybrids is high, and all the investigated captive stocks are similarly affected. The results highlight the potential shortcomings of using captive-bred individuals in supplementation and reintroduction projects, when the captive stocks have not been pedigreed and bred according to conservation principles.
Literature type: General
Journal: Vår Fågelvärld
Volume: 1/2007 , Pages: 22-25.
Language:
Swedish
Full reference: Engström, H. 2007. Hur skall det gå for fjällgåsen? Oförmåga till samsyn motverkar kraftfulla bevarandeinnsatser. [The future fate of the Lesser White-fronted Goose. Disagreements counteract effective conservation.], Vår Fågelvärld: 1/2007, 22-25.
Keywords: conservation
Literature type: General
Journal: Vår Fuglefauna
Volume: 28 , Pages: 171.
Language:
Norwegian
Full reference: Øien, I.J., Aarvak, T. & Ekker, M. 2005. Bevaring av dverggås langs den europeiske trekkruten. [Conservation of LWfG along the European migration route.], Vår Fuglefauna: 28, 171.
Keywords: conservation, status
Literature type: Report
Language:
Greek
(In Greek with English summary.)
Full reference: Athanasiadis, A., Rigas, Y., Arapis, T. 2005. Restoration and conservation management of Drana lagoon in Evros delta. Final report LIFE 00NAT/GR/7198. [Restoration and conservation management of Drana lagoon in Evros delta. Final report LIFE 00NAT/GR/7198.]
Keywords: EU-Life
Literature type: Rep.article
Language:
English
Full reference: Tolvanen, P., Bragina, T. & Bragin, E. 2004. Conservation work for the wetlands in Kustanay region, north-western Kazakstan, in 2001–2003. , In: Aarvak, T. & Timonen, S. (eds.). Fennoscandian Lesser White-fronted Goose conservation project. Report 2001-2003. WWF Finland Report No 20 & Norwegian Ornithological Society, NOF Rapportserie Report No 1-2004: pp. 41-43.
Keywords: Annual report, monitoring
Literature type: Scientific
Journal: Conservation Genetics
Volume: 5 , Pages: 501-512.
DOI: 10.1023/B:COGE.0000041019.27119.b4
Language:
English
Full reference: Ruokonen, M., Kvist, L., Aarvak, T., Markkola, J., Morozov, V.V., Øien, I.J., Syroechkovsky Jr., E.E., Tolvanen, P. & Lumme, J. 2004. Population genetic structure and conservation of the lesser white-fronted goose (Anser erythropus). Conservation Genetics 5: 501-512. https://www.dx.doi.org/10.1023/B:COGE.0000041019.27119.b4
Keywords: Anser erythropus, lesser white-fronted goose, Palearctic, management unit, population genetic Structure
Abstract:
The lesser white-fronted goose is a sub-Arctic species with a currently fragmented breeding range, which extends from Fennoscandia to easternmost Siberia. The population started to decline at the beginning of the last century and, with a current world population estimate of 25,000 individuals, it is the most threatened of the Palearctic goose species. Of these, only 30–50 pairs breed in Fennoscandia. A fragment of the control region of mtDNA was sequenced from 110 individuals from four breeding, one staging and two wintering areas to study geographic subdivisions and gene flow. Sequences defined 15 mtDNA haplotypes that were assigned to two mtDNA lineages. Both the mtDNA lineages were found from all sampled localities indicating a common ancestry and/or some level of gene flow. Analyses of molecular variance showed significant structuring among populations (φ ST 0.220, P < 0.001). The results presented here together with ecological data indicate that the lesser white-fronted goose is fragmented into three distinctive subpopulations, and thus, the conservation status of the species should be reconsidered.
Literature type: Report
Language:
English
Full reference: Aarvak, T.& Timonen, S. 2004. Fennoscandian Lesser White-fronted Goose conservation project. Report 2001-2003. , WWF Finland Report No 20 & Norwegian Ornithological Society, NOF Rapportserie Report No 1-2004.
Keywords: Fennoscandian annual report
Literature type: General
Journal: Vår Fågelvärld
Volume: 3/2003 , Pages: 6-12.
Language:
Swedish
(In Swedish)
Full reference: Øien, I.J. & Aarvak, T. 2003. Fjällgås. Finns det hopp för Skandinaviens ”sjungande gäss"? [Lesser White-fronted Goose. Is there hope for Scandinavias "singing goose"?], Vår Fågelvärld : 3/2003, 6-12.
Keywords: Scandinavia, Norway, Sweden, Finland, conservation, status
Number of results: 109