UDC 636.92

A. Pogorelova

The results of the analysis of the impact of the length of daylight and ambient temperature during pairing and pregnancy of the rabbit on multiple fetus and imitation rabbit sex in young specialized meat breeds. The multiple fetus found high rates of rabbit, detained for the duration of daylight hours 14-16 and temperatures of +11-20оС. Lower rates multiple fetus had rabbit for the duration of 6-8 hours of daylight and temperature and below 0оС and + +31оС and above. Dynamics of changes in multiple fetus toward greater with increasing duration of daylight and temperatures approaching the optimal maintenance. It was established that with increasing temperature to +30оС multiple fetus rabbit decreases. Determined that the least amount the rabbits born at low temperatures and minimum duration of daylight, but with an increase in the length of daylight increases and the number of births the rabbits. The studied, males are born contrary contribute to low temperatures and reducing the duration of daylight. The best value in offspring sex distribution (50/50) observed when approaching. Hold pairing with rabbit and pregnancy of the rabbit to +11о – +20оС and 12-14 hours duration of daylight. The analysis of variance of the factors in multiple fetus imitation rabbit and sex of calves. The results of analysis of variance indicate the likely impact of temperature and length of daylight on the floor in imitation of posterity, respectively 42 and 31%.

Key words: multiple fetus, hold, navpex, temperature, daylight, pregnancy.

The influence of temperature and light conditions at the formation of sex in rabbits of specialized meat breeds.

Issue №1 (93), 2017