our overview of the global �ractice of breeding chinchillas systematizes information about �erfor-mance and re�roduction conditions that determine the �rofitability of fur farms. ca�tive chinchillas are �olygamous and �olyestrous. Seasonal differences in the organosomatic indexes�� the number of s�erma-tozoids in males�� and the duration of the sexual cycle of females �redetermine �reservation of the seasonal habit of re�roduction. chinchillas retain their re�ro-ductive ability for 15 years. To save offs�ring�� it is im�ortant to avoid �remature mating of females younger than 6 months. although 10-16 follicles ri�en in the ovary of a chinchilla female�� their average annual fecundity is 2.2-4 �u��ies �er year. in accordance with the natural annual rhythm�� a female chinchilla ty�ically �roduces two litters�� being able to have 1-3 litters annually. The interval between whel�ings de�ends on �hoto�eriod�� illumination�� and age of females. Too frequent whel�ings exhaust the female organism and reduce its �eriod of re�ro-duction. litter size is affected by the genoty�e and conformation of animals�� as well as by �araty�ic factors acting during �regnancy and whel�ing. Pro�er selection of females and males is essential for fecundity im�rovement. To im�rove the fecundity of chinchillas�� use of re�roductive technologies is recommended�� including electroejaculation�� s�erm cryo�reservation�� estrus induction�� hormonal stimulation of ovulation�� and others. The �rofitability of commercial breeding of chinchillas is de�endent largely on the im�rovement of both qualitative (color� and quantitative (fecundity� traits�� which is im�ortant for russian fur farming.

From 2010 to 2015, a short-haired mink from Denmark and Poland was imported to the Savvatievo Animal Farm, which is large in size compared to the domestic one. To preserve and further increase the size of the mink, in addition to breeding work, the feeding standards were revised. Since 2010, new non-traditional feeds have been introduced into the diet of animals, the nutritional value of which is not known yet, the caloric content in 2015-2017 was increased to 165-170 kcal and by 2018-2021 it was brought to 180 kcal per 100 g of feed, while at the same time gradually reducing the amount of protein: in 2015-2017 to 7.5 g and in 2018-2021 to 6.5-7.0 g per 100 kcal of feed for young animals during the growth period (July-October). Feed with a high fat content is introduced. In this regard, it was decided to conduct a detailed analysis of some non-traditional feeds by fatty acid composition and determine the effect of the introduction of these feeds on the growth of young animals.

No abstract

No abstract

The pride of Russia has always been sable. Sable is unique not only in the quality of its fur, but also in the fact that almost the entire range of its habitat is located on the territory of our country. It was in our country that this animal was first bred in captivity. In this regard, Russia has long had a monopoly on the production of sable skins. In 1969, the black sable breed was approved, and in 1998, the «Saltykov» type of sable was approved. JSC «Saltykovsky Breeding farm» has created a unique herd of dark Sables with evenly spaced gray hair, the skins of which are valued at auctions by 10–30% more expensive [2]. The article presents the results of a comparative assessment of the productive qualities of Sables without gray hair and with different degrees of gray created in JSC «Plemzverosovkhoz » Saltykovsky» livestock. As a result of the analysis, it was found that Sables with gray hair have higher bonitirovki scores (more than 50%). Analyzing the indicators of bonitirovki in males and females with different degrees of gray hair, it was found that the quality of pubescence and color of males with bright gray hair is significantly superior to individuals without gray hair, the same trend is observed in females. In addition, a positive correlation was found (0,79) between the weight of skins in grams, their length and area both in Sables without gray hair, and in individuals with different degrees of gray hair. The most common defect on skins without gray hair is soaking.