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UDC 636.934.57.03
WAY OF STIMULATION REPRODUCTIVE FUNCTIONS OF MINKS
Razyapova L., Post-graduate student Balakirev N.A., Professor Moscow State Academy of Veterinary Medicine and Biotechnology named after K.I. Skryabin,
Moscow, Russia E-mail: sci@mgavm.ru
ABSTRACT
The use of bio-stimulator nukleopeptid, improves the fertility of females, males covered stimulated biological product by 4.5%, and the output register to whelp puppies female is 8.8% more than in the control group. Females’ fertility receiving the drug, increased by 18.5%, a decrease of disadvantaged whelping, pro-empty percentage of 6.7%, compared with the control group.
KEY WORDS
Immunostimulant; Mink; Main herd; Fertilizing capacity; Yield puppies.
The problem of immune reactivity regulation has great importance, both in theoretical, and in practical aspects. The search of new immunoactive preparations is one of actual task of zootechnical and veterinary medicine. The important place in regulation of the immune answer is stimulation of immunity [1]. In spite of wide practical use of various stimulators in the animal cattle breeding, many questions of their rational application are insufficiently studied. Such questions as the most optimum dosages, frequency rates of an injection and intervals are between them. In this regard, the task set by us in this work of studying of stimulating influence of a biostimulator nukleopeptid, allows to find out a number of questions of influence of these substances on an organism and to define rational methods of their use in fur farming [2].
Tests of preparation's action were carried out in February-March, 2013 on a mink of breed Skanblack in open joint stock market entity "Oktober fur farm". In February 4 groups of females up to 40 heads by the principle of analogs and 2 groups of males up to 30 heads were formed in February. Preparation in a different dosage was set in 2 weeks prior to rutting by a three-day course and further 1 time in 7 days, including during rutting. Animals of control group didn't receive the preparation. The scheme of formation of females and males groups of minks is shown in figure 1.
Figure 1 - Scheme of experience
After preparations’ introduction to adult males it was considered: the quantity a cage in day, quantity of the females’ leaper, % littered females from number leapered, % being pro-
empty and unsuccessful given rise females, quantity of puppies, morphological and biochemical indicators of blood. The quantity of puppies to a jigging, quantity of dead born puppies was considered at females.
RESULTS OF RESEARCH
Results of an assessment of males on sexual activity are presented in table 1. As we can see in the table 1, during rutting by males of skilled group it was made about 10,8 coitus that is more than control result for 4,6%. Respectively, the quantity of females leapered with one male in skilled group, also exceeded the control's result for 6,6%.
After females' whelping, impregnating ability of males' sperm was studied. It is seen from table 2, on one male of skilled group littered down 4,2 females that is 11,9% more, than in control.
Table 1 - Sexual activity of minks' males
Indicator Group
Control n=30 animals. Skilled n=30 animals.
Number of coitus , time 10,3±0,39 10,8±0,47
Number of leapered females 5,6±0,19 6,0±0,34
As a whole efficiency of males use is defined by number of the puppies received from each of them. This indicator, in its turn, depends on a great number of others: from number of the leapered females, fertility, % of pro-emptied and unsuccessful whelping.
Table 2 - Impregnating ability of sperm of males of minks' males
Indicator Group
control skilled
Littered down females on 1 male 3,7±0,32 4,2±0,26
Number of whelping , % 61,9±3,63 74,3±3,80*
Number of pro-emptied, % 35,2±4,11 25,7±3,81
Number of females,% 21,3 18,7
*- P<0,05.
The reliable difference between groups on percent of whelping is observed, in favor of skilled for 16,6%. The greatest specific weight of being pro-empty females - 35,2% was noted in control group that is 27% more than result of skilled group. The similar tendency is observed and on an indicator of females of NBR, such females in control group were registered 21,3% that exceeds result of skilled group for 13,9%. The analysis of the females’ fertility leapered with stimulated males is presented in table 3.
Table 3 - Females' fertility leapered with males stimulated by the preparation
Indicator Group
control skilled
Received puppies on a male, all animals 25,0±1,69 25,9±2,43
on leapered female 4,2±0,29 4,4±0,24
on whelped female 6,2±0,39 6,8±0,31*
received puppies in total, animals 750 777
* - P<0,05.
Table 4 - Results of females' whelping
Indicator Group
control The 1st skilled The 2nd skilled The 3d skilled
Pro-emptied females,% 10,0 10 3,3 3,3
Females NBR, % 10 6,6 3,3 6,6
received puppies, animals on the leapered female 4,4±0,28 4,6±0,34 5,4±0,20** 4,9±0,24
on whelped female 5,3±0,31 5,7±0,18 6,2±0,29* 5,9±0,23
total puppies, animals 131 145 168 152
**-P<0,005.
As it is seen in the table 3, the bigger quantity of puppies was received from males of skilled group - up to 25,9 animals on everyone on the average that is 4% higher, than in control. More puppies on littering female were received also in skilled group, at a reliable difference with control in 8,8%.
The analysis of the females' fertility presented in tab. 4, showed that the bigger quantity of being pro-empty females was noted in control group and 1 st-skilled, receiving 2,5% nucleopeptid solution. At the same time in the 2st and 3rd skilled groups this indicator was 6,7% lower. The greatest number of unsuccessful born females is registered in control group - 10%, the small percent of not well-being was noted in the 2nd skilled group receiving of 3% solution of a preparation. The best result of the received puppies on the leaprerd female was registered in the same group, at a reliable difference (P<0,005) with control in 18,5%, on a littering female for 14,5% (P<0,05)
As a result the greatest number of live puppies was born in group of the females receiving 0,1 ml for kg of the live weight of 3% of water solution of a preparation-168 animals.
Economic efficiency of using of a nucleopeptid preparation was defined by increase of number of the received puppies from females of the main herd.
To set a prime cost of an issue at minks kit crop R.T.Safiullin, M.A.Musatova's [3] formula was used according to which the cost of a puppy at the birth (PC) is a PC=1,82xPS/KR, where PS - the cost of a mink's skin, rub, KR - fertility.
At prime cost of a mink's skin of the 1660th ruble the charge of the main herd will increase in 1,82 times according to a formula therefore charges of 70 males will make 123928,2 rubles taking into account costs of acquisition and use of a preparation (table 5).
Table 5 - Economic indicators when using biostimulator nucleopeptid in feeding of minks male
Indicator Group
skilled control
Charges of 30 males of the main herd of minks, rub 90636 90636
The cost of a preparation per 30 males, rub 256 -
Total expenses, rub 90892 90636
Received puppies per 30 males, animal. 777 750
Prime cost of 1 kit crop, rub. 559,5 686,6
As a result of bigger quantity of the received puppies (4,4 animals on the leapered female) at biostimulator nucleopeptid inclusion to minks males the prime cost of 1 kit crop will be 4,5% lower in comparison with control.
Table 6 - Economic indicators when using biostimulator nucleopeptid in feeding of minks' females
Indicator g roup
The 2nd skilled control
Charges of 40 females of the minks' main herd, rub. 120848 120848
The cost of a preparation per 40 females, rub. 320 -
Total expenses, rub. 121168 120848
Received puppies per group of females, animals. 168 131
Prime cost of 1 head of a kit crop, rub. 686,6 719,3
Prime cost of 1 head of a kit crop per 40 females of skilled group will be 5% less than
prime cost of an kit crop in control group.
REFERENCES
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2. The instruction on nukleopeptid's application for increasing of additional weights while
feeding and increasing of resistance of young growth of cattle and pigs // Federal
Veterinary And Phytosanitary Monitoring Service, PVR-2-8.7/02147 - 10.06. 2008.
3. Safiullin R. T. Issue cost at the birth in fur farming / R.T. Safiullin, M.A. Musatov //
Veterinary science. - M., 2005. t.№9. - P.13.
