-
Welcome to BirdForum, the internet's largest birding community with thousands of members from all over the world. The forums are dedicated to wild birds, birding, binoculars and equipment and all that goes with it.
Please register for an account to take part in the discussions in the forum, post your pictures in the gallery and more.
ID of Lesser x Greater White-fronted Geese hybrids? (1 Viewer)
- Thread starter lanius.bg
- Start date
hannu
Well-known member
Rather difficult to find any photos of these hybrids, but take contact to follow persons:
http://www.piskulka.net/Organizations.htm
See also:
http://www.springerlink.com/content/u243n818252x6158/
http://www.math.jyu.fi/~kahanpaa/Kotisivut/AnserErythropus/Keskustelua/Lammi LWfG workshop 2005.doc
Anna-Carin Andersson & Minna Ruokonen (and Håkan Tegelström †),: Genetic results on wild and captive populations of the lesser white-fronted goose. 125 captive LWfG form 6 from Swedish farms, 1 Belgian (12) farm and 15 from Hailuoto farm in Finland. Birds from 10 farms (incl. Öster-Malma, Boda, Nordens Ark, Hailuoto, Belgium) tested, birds from five farms (Öster-Malma, Boda, Hailuoto, Nordens Ark, Belgium) used in introduction. All of the captive stocks are more or less related to one another. Sampled around 100 wild WfG and c. 100 wild LWfG including individuals from all over the the distribution area. The three species (LWfG, WfG, Greylag Goose) can be identified on the basis of mtDNA. No introgression from one species to another in the wild. They express that hybridization may occasionally take place in nature, but has not lead to introgression of the species in the wild. In the captive LWfG there altogether 8 different mtDNA haplotypes were found. 4 of these mtDNA haplotypes came from LWfG, 3 from WfG and 1 from Greylag Goose. 4 individual of the French ultralight project (birds from Belgian farm) had Greylag Goose mtDNA. The latter problem occurs also in the Finnish Hämeenkoski farm: ca 30% of the tested individuals from that farm carry Greylag Goose mtDNA . Nuclear genetic variation: 128 captive LWfG studied. Tested 26 microsatelite loci. Only 10 of those suitable for the study. 98 alleles found in total. 63% of all microsatellite alleles can be found in both species ; 32 private alleles for the wild WfG, 1 private allele for the wild LWfG, 3 private alleles for the captive LWfG. The nuclear variation of the 10 microsatellites support the species, however variation is not enough to identify hybrid ancestry. It is not possible to identify the hybrid individuals. Indication of hybrid origin was based on the private microsatellite alleles. Unfortunately, most private alleles found in low frequency. 12 microsatellite could be used. They have used assignment test. Most of the individuals carrying the WfG haplotypes have low probability to be assigned to wild LWfG. In conclusion: no hybrids were found in the wild, mtDNA from three Anser species were found in the captive LWfG stocks; a few hybrids can be identified in captive stock, but not all. Other markers would show other hybrid individuals. Therefore, it is not possible to estimate the amount of nuclear genes from Greater White-fronted Goose in the captive LWfG stocks. They do not recommend the use of the present captive stocks if reintroduction are to be continued.
LWFG observations in 2001-2007
http://www.math.jyu.fi/~kahanpaa/Kotisivut/AnserErythropus/LWfGobserv.html
http://www.piskulka.net/Organizations.htm
See also:
http://www.springerlink.com/content/u243n818252x6158/
http://www.math.jyu.fi/~kahanpaa/Kotisivut/AnserErythropus/Keskustelua/Lammi LWfG workshop 2005.doc
Anna-Carin Andersson & Minna Ruokonen (and Håkan Tegelström †),: Genetic results on wild and captive populations of the lesser white-fronted goose. 125 captive LWfG form 6 from Swedish farms, 1 Belgian (12) farm and 15 from Hailuoto farm in Finland. Birds from 10 farms (incl. Öster-Malma, Boda, Nordens Ark, Hailuoto, Belgium) tested, birds from five farms (Öster-Malma, Boda, Hailuoto, Nordens Ark, Belgium) used in introduction. All of the captive stocks are more or less related to one another. Sampled around 100 wild WfG and c. 100 wild LWfG including individuals from all over the the distribution area. The three species (LWfG, WfG, Greylag Goose) can be identified on the basis of mtDNA. No introgression from one species to another in the wild. They express that hybridization may occasionally take place in nature, but has not lead to introgression of the species in the wild. In the captive LWfG there altogether 8 different mtDNA haplotypes were found. 4 of these mtDNA haplotypes came from LWfG, 3 from WfG and 1 from Greylag Goose. 4 individual of the French ultralight project (birds from Belgian farm) had Greylag Goose mtDNA. The latter problem occurs also in the Finnish Hämeenkoski farm: ca 30% of the tested individuals from that farm carry Greylag Goose mtDNA . Nuclear genetic variation: 128 captive LWfG studied. Tested 26 microsatelite loci. Only 10 of those suitable for the study. 98 alleles found in total. 63% of all microsatellite alleles can be found in both species ; 32 private alleles for the wild WfG, 1 private allele for the wild LWfG, 3 private alleles for the captive LWfG. The nuclear variation of the 10 microsatellites support the species, however variation is not enough to identify hybrid ancestry. It is not possible to identify the hybrid individuals. Indication of hybrid origin was based on the private microsatellite alleles. Unfortunately, most private alleles found in low frequency. 12 microsatellite could be used. They have used assignment test. Most of the individuals carrying the WfG haplotypes have low probability to be assigned to wild LWfG. In conclusion: no hybrids were found in the wild, mtDNA from three Anser species were found in the captive LWfG stocks; a few hybrids can be identified in captive stock, but not all. Other markers would show other hybrid individuals. Therefore, it is not possible to estimate the amount of nuclear genes from Greater White-fronted Goose in the captive LWfG stocks. They do not recommend the use of the present captive stocks if reintroduction are to be continued.
LWFG observations in 2001-2007
http://www.math.jyu.fi/~kahanpaa/Kotisivut/AnserErythropus/LWfGobserv.html
Last edited:
