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ZEISS DTI thermal imaging cameras. For more discoveries at night, and during the day.

Italian Sparrow (1 Viewer)

Eroukhmanoff et al

Eroukhmanoff, Elgvin, Gonzàlez Rojas, Haas, Hermansen & Sætre (in press). Effect of species interaction on beak integration in an avian hybrid species complex. Evol Biol. [abstract]
 
Hermansen et al

Hermansen, Haas, Trier, Bailey, Nederbragt, Marzal & Sætre (in press). Hybrid speciation through sorting of parental incompatibilities in Italian sparrows. Mol Ecol. [abstract]
 
Italian x House Sparrow hybridisation

Bailey, Tesaker, Trier & Sætre (in press). Strong selection on male plumage in a hybrid zone between a hybrid bird species and one of its parents. J Evol Biol. [abstract] [supp info]

Trier, Hermansen, Sætre & Bailey 2014. Evidence for mito-nuclear and sex-linked reproductive barriers between the hybrid Italian sparrow and its parent species. PLoS Genet 10(1): e1004075. [article] [pdf]

Hermansen et al 2011. Hybrid speciation in sparrows I: phenotypic intermediacy, genetic admixture and barriers to gene flow. Mol Ecol 20(18): 3812–3822. [pdf]
Elgvin et al 2011. Hybrid speciation in sparrows II: a role for sex chromosomes? Mol Ecol 20(18): 3823–3837. [pdf]
Eroukhmanoff et al 2014. Effect of species interaction on beak integration in an avian hybrid species complex. Evol Biol 41(3): 452–458. [pdf]
Hermansen et al 2014. Hybrid speciation through sorting of parental incompatibilities in Italian sparrows. Mol Ecol 23(23): 5831–5842. [pdf]
 
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Dutch Birding

Forthcoming...
  • Winkel 2015. Italian Sparrow: hybridization with House Sparrow in northern Italy and rufous-breasted morph. Dutch Birding 37(4): 238–246.

  • Poelstra 2015. Hybridization and speciation: the case of Italian Sparrow. Dutch Birding 37(4): 251–254.
[via AvianReferences]

Italian Sparrow Passer [domesticus] italiae is now recognised as a distinct species by H&M4, IOC, eBird/Clements, HBW, AERC, BOURC and DB; but not by BirdLife.

PS. ...just arrived. :t:
 
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All very interesting researches that however arise many questions that they not vene tried to address or solve even less: so, why in Sicily there is Passer italiae according to the genetic done but they looks in typical breeding areas cloeser to Spanish in fenotipus ? So, what it is P.h.maltae? This accepted taxon should now be synonimised with italiae or it become a subsp. of italiae that will be then P.i.italiae and P.i.maltae? Or what ? And why the call and song in Sicily is closer to Spanish rather than Italian even if not fitting 100%...
So, why also true colonies of isolated Spanish and also Italian are breeding in Sicily in some peculiar areas ?

Etc etc

A HUGE BIG CAOS !!!:eek!::eek!:
 
So, what it is P.h.maltae? This accepted taxon should now be synonimised with italiae or it become a subsp. of italiae that will be then P.i.italiae and P.i.maltae?
Subspecies maltae (Hartert, 1903) of Sicily/Malta is indeed synonymised with italiae by (eg) Moreau & Greenway 1962 (Peters), Clement et al 1999 (Finches & Sparrows), Summers-Smith 2009 (HBW 14), H&M4, IOC and eBird/Clements. But I suspect that current treatments of the complex are probably over-simplistic...
 
This may just be a one of many geographic subspecies but Passer brutius from Calabria was described in 1890 prior to maltae??
AERC TAC (2003) gives the range of brutius as 'central and southern Italy', with maltae in 'Malta and Sicily with off-shore islands', and italiae sensu stricto in 'southern Switzerland, northern Italy, Corsica, Elba, and Crete' (presumably reflecting BWP?).

H&M3 additionally notes that payni Hachisuka, 1926 (Corsica) and africanus Stephan, 1999 (NW Africa) have also recently been used "for stabilised hybrids found where domesticus and hispaniolensis meet".
 
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Eroukhmanoff et al 2016

Eroukhmanoff, Rowe, Cramer, Haas, Hermansen, Runemark, Johnsen & Sætre 2016. Experimental evidence for ovarian hypofunction in sparrow hybrids. Avian Res 7: 3. [article & pdf]
 
Runemark, A., Trier, C.N., Eroukhmanoff, F., Hermansen, J.S., Matschiner, M., Ravinet, M., Elgvin, T.O. and Saetre, G.P., 2018. Variation and constraints in hybrid genome formation. Nature Ecology & Evolution. doi:10.1038/s41559-017-0437-7

Hybridization is an important source of variation; it transfers adaptive genetic variation across species boundaries and generates new species. Yet, the limits to viable hybrid genome formation are poorly understood. Here we investigated to what extent hybrid genomes are free to evolve by sequencing the genomes of four island populations of the homoploid hybrid Italian sparrow Passer italiae. We report that a variety of novel and fully functional hybrid genomic combinations are likely to have arisen independently on Crete, Corsica, Sicily and Malta, with differentiation in candidate genes for beak shape and plumage colour. However, certain genomic regions are invariably inherited from the same parent species, limiting variation. These regions are over-represented on the Z chromosome and harbour candidate incompatibility loci, including DNA-repair and mitonuclear genes. These gene classes may contribute to the general reduction of introgression on sex chromosomes. This study demonstrates that hybrid genomes may vary, and identifies new candidate reproductive isolation genes.

https://www.nature.com/articles/s41559-017-0437-7
 
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