RESUMO
Nucleotide sequence diversity in two mtDNA loci (the cytochrome b gene and the control region) was for the first time studied in the Baikal seal Pusa sibirica with the use of several spatiotemporal samples. The population was found to be evolutionarily young and to be in the stage of demographic expansion.
Assuntos
Focas Verdadeiras , Animais , Focas Verdadeiras/genética , Sequência de BasesRESUMO
Abundance of 388 ± 108 whales for the Okhotsk Sea bowhead whale population based on individual genotyping was estimated using the capture-recapture method for the open population model. The data demonstrate that this endangered population shows no signs of recovery.
Assuntos
Baleia Franca/genética , Espécies em Perigo de Extinção/estatística & dados numéricos , Animais , Baleia Franca/fisiologia , Genótipo , SibériaRESUMO
Over the past half-century, the common hamster (Cricetus cricetus), along with range-wide decline of natural populations, has actively populated the cities. The study of the genetic structure of urban populations of common hamster may shed light on features of the habitation of this species in urban landscapes. This article is focused on the genetic structure of common hamster populations in Simferopol (Crimea), one of the largest known urban populations of this species. On the basis of the analysis of nucleotide sequences of the cytochrome b gene and mtDNA control region, and the allelic composition of ten microsatellite loci of nDNA, we revealed that, despite the fact that some individuals can move throughout the city at considerable distances, the entire population of the city is represented by separate demes confined to different areas. These demes are characterized by a high degree of the genetic isolation and reduced genetic diversity compared to that found for the city as a whole.