Chromosomal characterization of four antarctic procellariiformes
2013; Volume: 41; Linguagem: Inglês
ISSN
2074-1235
AutoresAnalía Del Valle Garnero, M. Boccelli, Jean Carlo Pedroso de Oliveira, Mario Angel Ledesma, Diego Montalti, Néstor Coria, Ricardo José Gunski,
Tópico(s)Avian ecology and behavior
ResumoKnowledge about the basic biology of class Aves, which includes more than 9000 species, is still incomplete, especially in regard to their genetics and evolution. Argentina and Brazil, for example, have a significant diversity of birds; the karyotype has been described for slightly above 20% (Argentina) and less than 14% (Brazil) of bird species (Santos & Gunski 2006; Cuervo et al. 2011). Among Antarctic and sub-Antarctic birds, only four have been cytogenetically analyzed: Antarctic Shag Leucocarbo bransfieldensis (2n = 72) (Phalacrocoracidae), Kelp Gull Larus dominicanus (2n = 68) (Laridae) and Snowy Sheathbill Chionis albus (2n = 76) (Chionidae) (Ledesma et al. 2005), all of which were based on conventional staining, as well as Magellanic Penguins S. magellanicus (2n = 68) (Spheniscidae) (Ledesma et al. 2003), for which differential staining (C-banding) was carried out. The determination of chromosomal characteristics represents an important tool for conservation plans, as well as for phylogenetic and evolutionary studies of this class (Benirschke et al. 1980; Bed’Hom et al. 2003).
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