title: [Trend in the emergence of flea imagoes from cocoons in the nests of a mountain gopher (Spermophilus musicus) in the central Caucasian highland natural focus of plague].
abstract: The results of observations of a trend in the emergence of flea imagoes from cocoons in the nests of mountain gopher (Spermophilus musicus) (Elbrus region) confirm that the dominant species: Citellophilus tesquorum elbrusensis and Ctenophthalmus golovi golovi have two generations. Emergence of first-generation imagoes from cocoons is recorded in July-August in the nests where the grophers constantly inhabit in May-June. These are brood-rearing and other summer nests and, to a lesser degree, former wintering ones. Hatching of the bulk of second-generation flea imagoes is observed in the nests constantly inhabited by grophers in July-August (these are nests made from summer holes and renovable wintering nests). The onset of emergence of second-generation imagoes from cocoons in both flea species is noted in September; some specimens hibernate in the cocoons, by emerging from them next April.
authors: L I
authors: LI
authors: Beliavtseva
mesh_terms: D000531:Altitude; D000818:Animals; D005260:Female; D006605:Hibernation / Q000502:physiology; D006801:Humans; D007303:Insect Vectors / Q000502:physiology*; D008297:Male; D008675:Metamorphosis, Biological; D010930:Plague / Q000635:transmission; D011157:Population Dynamics; D012426:Russia; D012589:Sciuridae / Q000469:parasitology*; D012621:Seasons; D005423:Siphonaptera / Q000502:physiology*; D015010:Yersinia pestis / Q000502:physiology