[Heterochromatin and euchromatin regions in the chromosomes of various representatives of the subfamily Bovinae]. / Geterokhromatinovye i éukhromatinovye raiony khromosom nekotorykh predstavitelei podsemeistva Bovinae.

Heterochromatin distribution was studied in three species of subfamily Bovinae: bison (Bison bison), European bison (Bison bonasus), and gayal (Bos frontalis). In all of the studied species, C- and CMA3-banding and in situ hybridization with satellite DNAII (satDNAII) revealed the conservative distribution of heterochromatic regions in autosomes; sex chromosomes did not contain the classical constitutive heterochromatin. The Y chromosome was the most variable element of the karyotypes of both bison species and the gayal. A mechanism for formation of the acrocentric Y chromosome in B. bison was suggested. This hypothetical mechanism included breakage of the p arm at the telomeric region and subsequent translocation and inversion. The map of B. bison chromosomes (491 bands per haploid set) is presented. The data obtained are discussed in terms of speciation and the evolution of Bovinae karyotypes.

[Helminths in an Askaniia-Nova herd of eland and experiences in eradicating Strongylata infestation]. / Izuchenie gel'mintov u Askaniiskogo stada antilop kanna i opyt ikh ozdorovleniia ot strongiliatozov.

Parasitological complex studies of the available eland stock (60 individuals) were first carried out. As a result 100 % infection rate of the herd and the age dynamics of strongylatoses were revealed. The autopsy of animals have shown that five species of six species of nematodes and one species of cestodes are common parasites of ruminants of the Ukraine steppe zone and two species are specific parasites of eland. For sanitation of the herd an anthelminthic preparation produced in Hungary was used. The preparation decreased the initial infection rate to 7.3%.

[Wohlfahrtiasis in wild ungulates in the Askaniia-Nova Zoo]. / Vol'fartioz dikikh kopytnykh v zooparke "Askaniia-Nova".

The paper presents data on the sick rate with volfartiosis in different species of wild ruminents. The animals were maintained in spacious enclosures (up to 1550 hectare). This disease was recorded in 24 species of animals, african eland (33.5%) and american bison (9.4%) being infected mostly often. The morbidity dinamics within years and its dependence on weather conditions is given. The methods of prophylaxis and medical treatment of wild animals are discussed.