Richard Klim
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D'oh! I thought it would be about feuding northern clans of radioactive quackers. :smoke:
Peters, Winker, Millam, Lavretsky, Kulikova, Wilson, Zhuravlev & McCracken (in press). Mito-nuclear discord in six congeneric lineages of Holarctic ducks (genus Anas). Mol Ecol. [abstract] [supp info]Forthcoming...
Peters, Winker, Millam, Lavretsky, Kulikova, Wilson, Zhuravlev & McCracken (in review). Mito-nuclear discord in six congeneric lineages of Holarctic ducks (genus Anas).
If anyone has access: do they make any recommendations regarding wigeon or green winged teal?
Peters et al. 2014 said:Among these six lineages, the wigeon and teal have the most similar population histories. Both lineages have relatively deep mtDNA divergences and diagnosable plumage differences between OW and NW. Although nuDNA differentiation is weak, allelic frequency differences are sufficient for assigning individuals to their respective populations in most cases (Fig. 5E,F). Peters et al. (2012b) argued that teal have likely experienced a long history of parapatric divergence, and that male-mediated gene flow has been sufficient to prevent the completion of speciation despite the deep mtDNA divergence. This scenario seems to fit the wigeon as well. Although Eurasian and American wigeons are recognized as separate species on the basis of morphology, male-mediated gene flow likely inhibits broad-scale genomic differentiation and the evolution of strong isolating mechanisms. The Eurasian wigeon has become more common on the Pacific coast of North America during winter (Edgell 1984), and hybridization with American wigeon might be increasing. This species pair provides an excellent opportunity for studying mechanisms of speciation and factors contributing to mito-nuclear discord
John Boyd (TiF):For the generic reassignment of Andean Goose, why Andichenodes Boetticher 1950 rather than Oressochen Bannister 1870?
Oressochen (Bannister 1870) replaces Andichenodes (Boetticher 1950) due to priority.
Taxonomy in flux - indisputably!He is so fast! Great job.
Taxonomy in flux - indisputably!
The shovelers (genus Anas) are a globally distributed dabbling duck lineage comprising four species, each found on a different continent. Although these species are widely allopatric, high dispersal abilities potentially make gene flow likely. We obtained samples from the Holarctic northern shoveler (Anas clypeata; N = 50), African Cape shoveler (A. smithii; N = 28), South American red shoveler (A. platalea; N = 23), and Australasian shoveler (A. rhynchotis; N = 13) from widely distributed locations throughout their respective ranges. We sequenced five nuclear introns and the mitochondrial control region to examine phylogenetic relationships and to test for gene flow. Phylogenetic relationships inferred from mitochondrial (mt) DNA and nuclear (nu) DNA were concordant, recovering northern and Australasian shovelers as sister taxa and the red shoveler as the basal lineage. Coalescent analyses revealed significant evidence of gene flow from the northern shoveler into the Australasian shoveler and perhaps into the Cape shoveler, but not into northern or red shoveler. We conclude that the migratory behavior of northern species, relative to the sedentary behavior of the southern species, facilitates gene flow, and that this species complex is an excellent candidate for divergence with gene flow models of speciation.
Nelson, McCracken & Peters 2014. Divergence and gene flow in a cosmopolitan lineage of dabbling ducks. Evolution 2014. (p355)
AOU-SACC Proposal #637 (Jaramillo, Jul 2014): Transfer Chloephaga melanoptera to Neochen.Bulgarella, Kopuchian, di Giacomo, Matus, Blank, Wilson & McCracken (in press). Molecular phylogeny of the South American sheldgeese with implications for conservation of Falkland Islands (Malvinas) and continental populations of the Ruddy-headed Goose Chloephaga rubidiceps and Upland Goose C. picta. BCI. [abstract]
SACC proposal passed, 2 Dec 2014: RECENT CHANGES.AOU-SACC Proposal #637 (Jaramillo, Jul 2014): Transfer Chloephaga melanoptera to Neochen.