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Ryazan’, Russia

Mudrik E.A.,Russian Academy of Sciences | Kashentseva T.A.,Oka Crane Breeding Center | Politov D.V.,Russian Academy of Sciences
Russian Journal of Developmental Biology | Year: 2016

Using ten microsatellite loci, paternity analysis has been conducted for 71 individuals of the Siberian crane (Grus leucogeranus Pallas) obtained under artificial insemination in Oka Crane Breeding Center in 2001–2014. The fathers of 39 chicks were the sires whose sperm was used for insemination directly before fertilized egg laying. Paternity of 23 fertilizations belonged to the sires whose sperm was used in the beginning or middle of insemination cycle. Nine cases of fertilization resulted from natural copulation of artificially inseminated females with their social partners. The terms of sperm storage in the female’s reproductive ducts before fertilization were 0–6 days in the case of paternity of the last sperm donor and 2–15 days in the case of competing sperm by previous donors. Genetic relatedness by microsatellite loci between breeders of the captive Siberian crane population does not prevent fertilization and does not always lead to inbreeding depression. © 2016, Pleiades Publishing, Inc.

Mudrik E.A.,Russian Academy of Sciences | Kashentseva T.A.,Oka Crane Breeding Center | Gamburg E.A.,Russian Academy of Sciences | Politov D.V.,Russian Academy of Sciences
Biology Bulletin | Year: 2014

The genetic diversity of the founders of an artificial population of the Siberian crane Grus leucogeranus Pallas (rare species of cranes) was characterized using 10 microsatellite loci. It was established that the allelic diversity (on average, 5.9 alleles per locus) and genic (H O = 0.739) diversity of the Siberian crane is rather high and comparable with the estimations for natural populations of different crane species. Genetic passportization of the birds (119 individuals) from the register of the Siberian crane International Studbook was carried out at the initial stage. The efficiency of genetic passportization for individual identification, identification of the origin, paternity analysis, and exclusion of inbreeding was demonstrated in Siberian cranes under natural mating and artificial insemination. Cases of natural reproduction in pairs of Siberian cranes imprinted to the human and continuous storage of spermatozoa in the female reproductive ducts were registered. © 2014 Pleiades Publishing, Inc.

Klenova A.V.,Moscow State University | Volodin I.A.,Moscow State University | Volodina E.V.,Moscow Zoo | Postelnykh K.A.,Oka Crane Breeding Center
Behaviour | Year: 2010

Voice breaking is a process associated with puberty of human males that also occurs in adolescence in some birds. This study reports the jump-like vocal changes occurring during voice breaking in adolescent red-crowned cranes (Grus japonensis). We investigated acoustic parameters of chirp and trill calls during vocal ontogenesis from hatching to the age of 1.5 years in 17 male and 31 female captive red-crowned cranes and compared them with definitive calls of 5 male and 8 female conspecific adults. During voice breaking, trills and chirps of both sexes contained two non-overlapping independent fundamental frequencies: the upper one, representing the retained juvenile frequency, and the lower one, the newly attained adult frequency. Before voice breaking, the calls contained only the upper frequency, whereas after it only the lower one. Voice breaking occurred between the age of 7 and 11.5 months. We test whether sex, dates of birth and body mass gain are associated with voice breaking and speculate whether voice breaking triggers the disruption of the parent-chick bond or vice versa, or both events are driven by a third, yet unidentified trigger. © Koninklijke Brill NV, Leiden, 2010.

Mudrik E.A.,Russian Academy of Sciences | Kashentseva T.A.,Oka Crane Breeding Center | Postelnykh K.A.,Oka Crane Breeding Center | Nosachenko G.V.,Oka Crane Breeding Center | Politov D.V.,Russian Academy of Sciences
Russian Journal of Genetics | Year: 2015

The sex ratio of Siberian crane chicks (Grus leucogeranus Pallas) from the captive population of the Oka Crane Breeding Center was analyzed with the use of molecular sex marker EE0.6 in 2009–2014. We determined the sex of 84 birds bred from 12 dams by means of artificial insemination and natural breeding. The total primary sex ratio was 40: 44, and the secondary sex ratio was 36: 39 with a minor female bias. The mortality rate of embryos was the same for both sexes. The primary and secondary sex ratio for the first eggs in clutches were in-line with total sex ratio. The relatedness of parents by microsatellite loci has no effect on sex ratio in chicks of naturally and artificially propagating dams. © 2015, Pleiades Publishing, Inc.

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