Change of biological parameters of poultry semen at cryopreservation

The cryobanks of genetic material are an important element of assisted reproductive technologies. This technology allows more efficient use of genetic material, ensuring to obtain the maximum possible number of offspring for to preserve and restore of rare and endangered species. The most common biomaterial used in programs for the conservation and restoration of the genetic resources of agricultural poultry are spermatozoa. The spermatozoa undergo significant technological treatment during freezing and thawing. Some stages of this cycle are lead to the death of a large part of the cells, damage to their individual organelles or segments. The aim of the research was to study the effect of the freezing and thawing cycle on the biological parameters of spermatozoa in agricultural poultry. The objects of research were adult males of different types of agricultural poultry: roosters Gallus gallus ( n = 6), quails Coturnix coturnix ( n = 10), guinea fowls Numida meleagris ( n = 6), turkeys Meleagris gallopavo ( n = 3) and geese Anser anser ( n = 4)...