RU2557779C1 - Method of increasing animal reproduction - Google Patents

Abstract

FIELD: veterinary medicine.

SUBSTANCE: method comprises intramuscular administration to females of ovulation stimulating drugs, at that in reproduction of roe deer maintained in semi-free conditions, the females are sampled with the increased number of offspring. 1÷2 female underyearlings at the age 3÷5 days are taken from each of them, isolated in separate nursery, raised and in achievement of puberty the ovulation and estruation stimulating drugs are administered intramuscularly, then elite male producers are caught, the potency and spermatogenesis stimulating drugs are administered intramuscularly to them, and they are placed in the area of maintenance of female underyearlings ready to mate, at the rate of one male producer per 5÷7 female underyearlings.

EFFECT: increase in reproductive function of roe deers.

Description

The invention relates to biotechnology, and in particular to methods of increasing the number of wild animals, mainly roe deer, located in an isolated limited area, for example, in hunting enclosures, animal nurseries.

A known method of artificial insemination of sheep at a fixed time (RF patent for the invention No. 2162670. A method of frontal artificial insemination of sheep at a fixed time, IPC A61D 19/02, dated 02/10/2001). The method consists in a double single dose of intramuscular injection to sheep of the drug estrofan in a single dose of 1.0 ml with an interval of 8-9 days. 48 and 72 hours after the second administration of estrofan, artificial insemination of sheep is carried out. An artificial sperm of the male is introduced into the female genitals by artificial method.

This method is applicable for pets. It is very difficult to use for wild animals due to the difficulty of catching males to obtain sperm, the occurrence of stressful situations during capture. The transferred stresses in capturing females for artificial insemination reduce the likelihood of successful insemination. In wild animals, it is difficult to determine the timing of estrus and the readiness of female wild ungulates for fertilization.

The closest in technical essence to the proposed solution is a way to increase the reproduction of cows (Valyushin K.D., Medvedev GF Obstetrics, gynecology and biotechnology of animal reproduction, textbook, 2nd edition.- Mn .: Urozhay, 2001, p. 320). The method increases the number of ovulation in the ovaries in cows - donor embryos. Superovulation is carried out by administering the follicle-stimulating hormone Gonadotropin FFA and prostaglandin F2 _α . After the animals arrive at the hunting (extrus) stage, they are inseminated and embryos are removed from donor cows in a predetermined time period and transplanted and implanted to heifers and cows.

The disadvantages of this method, as well as the above analogue, are the difficulty of using it for wild animals, as well as an insufficient number of reproduced animals.

The task of the invention is to increase the reproduction of roe deer by additional reproduction during the extra rut in December of this year, as well as genetic improvement of the offspring.

The problem is solved in that in a method of increasing the reproduction of animals, including intramuscular injection of preparations stimulating ovulation to females, according to the proposed solution, when reproducing roe deer kept in semi-free conditions, females with an increased number of offspring are selected, 1 from each of them is selected for 3 ÷ 5 days, 1 ÷ 2 year-olds of a female individual, isolate them into separate nurseries, feed them and, upon reaching the puberty of these females, they are injected intramuscularly with stimulating ovulation and sexual hunting prep Ata, then catch elite male manufacturers, intramuscularly injected with increasing potency and spermatogenesis formulations and placed in a zone of content ready to mate female juveniles based - one male-producer 5 ÷ 7 females fingerlings.

It should be noted that puberty in roe deer occurs approximately at the age of six months, i.e. in the month of December in extreme conditions of existence in nature (snow, low temperatures, wind). At this time, the search for and extraction of fodder resources are at the forefront. During this period, there is a decrease in the sexual activity of males, the rutting period in which occurs from August to September. It is also known that sexually mature male roe deer are able to mate from May to January, and in the offspring the female can have from one to four calves. There is a disconnected habitat of males and females with calves in the winter. This negates the possibility of fertilizing ready-for-mating females of underyearlings and females, for some reason not fertilized during the mass rut. The claimed distinctive features of the proposed method will allow the reproduction of roe deer to use the biological capabilities of female yearlings and thereby increase the number of roe deer. Semi-free conditions of keeping and artificially created habitat of roe deer include their keeping in hunting enclosures, animal nurseries.

The selection of female underyearlings from each highly fertile female of more than two can lead to genetic deterioration of the offspring.

Reducing the age of separation of female under yearlings from mothers less than 3 days can lead to weakening immunity of newborn calves and their health, separation of them at the age of more than 5 days is impractical, since there will be difficulties with their capture and taming.

The optimal number of females, from 5 to 7 per male producer, is associated with the physical condition and sexual activity of male producers under extreme conditions, as well as the rate of spermatogenesis and its sufficiency for the fertilization of each female.

A decrease in the number of females per male less than 5 is irrational due to the emerging rivalry between the males; an increase in this number more than 7 does not guarantee the fertilization of all the females contained in the restricted area.

The genetic improvement of the offspring is due to the selection of the most healthy, prolific and thoroughbred females, the choice of the largest and most viable cubs from offspring. Improves offspring and selection of elite males.

The method is as follows.

From each highly fertile female ungulate, such as roe deer, located in an isolated area, for example in a hunting aviary, 1-2 of the most viable yearlings of a female individual aged 3-5 days are separated. Young yearlings are taken from a female animal that has three or more cubs in the offspring. The yearlings are placed in separate isolated nurseries for manual artificial and subsequent natural feeding and maintenance with mineral-salt, vitamin and protein supplements to achieve their high physical, morphological and functional conditions. The remaining pups are left to be fed with their mothers.

When puberty is reached at six months of age, female fingerlings in early December on the 10th day of the sexual cycle intramuscularly administer ovulation-stimulating drugs, for example 40 ME gonadotropin FFA (Folligon or Fallmag preparations) and injections of prostaglandin F2 _α (Esrofan preparation) on the 12th day of the cycle 30 μg )

With severe oestrus, female underyearlings capture elite male producers into livestock traps in the aviary complex and inject them intramuscularly with drugs to enhance sexual activity, increase testosterone in the blood and spermatogenesis, for example, gonadotropin releasing hormone (Surfagon drug) at a rate of 10 μg per animal. Then the males are placed in the detention area of females of yearlings ready for mating for fertilization at the rate of one male producer for 5–7 female yearlings.

The invention will find application in animal husbandry, in hunting farms, animal nurseries to increase the number of wild animals.

Claims (1)

A method of increasing animal reproduction, including intramuscular administration of preparations stimulating ovulation to females, characterized in that when reproductive roe deer are kept in semi-free conditions, females with an increased number of offspring are selected, 1 ÷ 2 female yearlings are selected from each of them at the age of 3-5 hours, isolate they are fed into separate nurseries, they are fed and, upon reaching the puberty of these females, they are intramuscularly injected with drugs that stimulate ovulation and sexual hunting, then they are caught by elite male producers th, they are injected intramuscularly with drugs that increase potency and spermatogenesis and place them in the area of keeping ready for mating female yearlings at the rate of one male producer for 5-7 female yearlings.