Fox breeding technology in spring

Mastering the mating technology of female foxes is the key to improving fertility and enhancing economic efficiency. The breeding season of the female fox is very strict. It only breeds once a year, usually starting in late January and ending in late April. Fox is a spontaneous ovulation animal, ovulation has an accurate timing, usually the silver black fox ovulation occurs in the afternoon of the first day of estrus or the next morning, the Arctic fox in the heat of the second and third days, but not all the eggs mature simultaneously Discharge, there is a certain interval, silver black fox about 23 days, blue fox about 5 - 7 days. According to studies, the ovulation of female fox is only 13X on the first day, 47% on the second day, 30% on the third day, and 7% on the fourth day. To improve the fertility rate of the female fox, it is best to mate in the second and third days. If the rate of empty mating is about 40%, the compounding will be carried out on the second day after the initial allocation. The empty rate is about 26%. The use of 2 to 3 combinations will reduce the empty rate to less than 4%. Therefore, the use of female foxes in combination to improve the conception rate and litter size. The male fox sperm can survive in the female fox reproductive tract for about 24 hours. In order to ensure that female foxes are in time for heat, timely breeding, full-fledged and full-fledged purposes, the following technical keys must be captured. First, make preparations before mating 1, adjust the condition of a good fox adjustment fox body condition, start after the autumn equinox, to be foxes, foxes were fed, respectively, on the animal species balance adjustment. The public fox adjusts to the upper-middle-scale escort condition before mating, and the female fox adjusts to the moderate-lying condition. To prevent starvation and reduce fat, hunger and fat reduction detrimental to the health of foxes. Fox can not be too fat or too thin, over-fertilized estrus is slow, unfavorable mating, and some are not estrus, too thin adverse estrus should be misled. Overweight or too thin body condition can affect the follicle development of the female fox, which will affect the number of ovulation, and reduce the rate of conception and slaughter. "The early estrus body condition is good, not fat or thin, early estrus, breeding more smoothly and more productive. 2. Doing a good job of preventing epidemic diseases All kinds of foxes that participate in spring breeding are required to immunize dogs with fever, viral enteritis and foxcephalitis according to the epidemic prevention program. From the effects of the above several vaccines, the effect of the single-linked vaccine is better than that of multi-linked vaccines. Use method and dosage, use according to the bottle sign. We must choose reliable vaccines for use. At present, there are many units that produce and sell the same type of vaccine in China. According to incomplete statistics, there are more than 8 units, and only 2-3 manufacturers actually hold the national approval number and production batch number, so we choose Use vaccines carefully. 3, prevention and treatment of good Gardner's disease Fox Gardner's disease, currently widely popular in China's fox farm, great harm. According to statistics, the major foxes in the country tested fox serum, the positive rate was 0.9% to 21.9%, and the heavier field was over 75%. The rate of empty arms was 3.2% to 47.5%, and the abortion rate was 1.5% to 14.7%. Gardnerella vaginalis can cause a miscarriage or abortion of the female fox that is between 20 days and 45 days of pregnancy and the fetus is absorbed. After infected with Gardnerella, the foxes mainly cause genitourinary diseases. The female foxes have vaginitis, metritis, cervicitis, ovarian cysts, and abscesses around the kidney; male foxes have symptoms such as dermatitis and prostatitis. Loss or loss of mating ability, such as mating female fox can be transmitted to female Fox Gardner's disease; severe illness: manifested anorexia, mental depression, lying in a corner of the cage, typical characteristics of hematuria, late body temperature, liver Degeneration, kidney enlargement, and finally septicemia, have caused great harm to the fox industry. The treatment of the disease with chloramphenicol, erythromycin, ampicillin, thanks to benefit, the negative foetida injection Gardnerella vaccine can be treated, convenient method to use Baiyang to prevent and control, before catching each catch 10 kg The weight of male and female injected 0.3ml, once a day for three consecutive days will receive a significant effect, can put an end to miscarriage and empty arms. Using chloramphenicol 2 times a day, each 0.25 mg (1 tablet) continuous administration for 7 days (prevention) to 12 days (treatment) will also receive good results. 4. Exterminate parasites in vivo and in vitro and in vivo, causing great harm to the fox. For example, parasites, tapeworms and pregnant foxes with fox eggs will be infected with tsutsugamushi disease. Some foxes can see vomiting or maggots if they do not reach the nesting time. They may cause intestinal obstruction due to excessive foxes. The death, analysis shows that the intestinal worms clog into groups; again such as in vitro tsutsugamushi disease, pregnant fox have worm eggs, the production of foxes are subject to infection. The body skin of the fox mouth, nose, eyes, ears, head and chest is reddened with rash-like nodules, bald hair, thickening of the subcutaneous tissue, and itching and other symptoms. There are nematodes, aphids, toxoplasmosis, etc., if not cured before mating, pregnant follicles will be transmitted to young fox after giving birth, so give a thorough cure before mating. For the treatment of parasitic diseases both in vivo and in vitro, the new antiparasitic drugs developed by Pfizer Animal Health Co., Ltd. for animals can be eliminated. The extinction of all kinds of parasites on dogs and fur animals requires only one shot to kill; its efficacy period is 18 days, and dogs and fur animals are injected intramuscularly at a dose of 0.3 ml per 10 kg body weight. A fox 0.2-0.3ml; a blister 0.lml effect is good. It eliminates toxic and side effects, does not produce drug resistance, does not destroy the immune system, is safe to use, is stored at room temperature, and has good stability. Its validity period is five years. Please try it out beforehand. l% ivermectin injection is also a good drug for the treatment of parasites in the body and in the body. It is a new drug developed on the basis of avermectin. It is less toxic than avermectin. The dosage is 0.3 ml per 10 kilograms of body weight. It is played once every 7 days. Three times is a good course of treatment. 5, fine breeding management and management of the first two months to increase the movement of the fox, give full illumination. Studies have shown that the development of fox reproductive organs is regulated by natural photoperiod and light. When the number of sunshine hours after the autumnal equinoxes is shorter than the night time, the reproductive system begins to develop slowly. With the further extension of daylight hours during the day, silver black fox and blue fox enter the breeding season one after another. If the fox is in the crucial period of development of the reproductive system, artificially altering the light cycle and light rhythm will cause the female fox reproductive system to be disordered, which will have an adverse effect on estrus breeding; Fox is most sensitive to light. The duration of illumination in the later period of breeding should not exceed 12 hours, and the natural sunshine time can be met without artificially increasing the illumination. To strengthen feed nutrition during the breeding period, the fox requires sufficient nutrients such as protein, minerals, and vitamins during the development of reproductive organs. The key to promoting the development of sexual organs is to ensure the full price of feed nutrition, especially to ensure the supply of full-priced protein and reproductive vitamin A and vitamin E. Nutritionally, we must appropriately reduce energy feeds and increase protein feeds. Animal feeds account for more than 65% of the diet. In the feed, it is necessary to intermittently increase the garlic (2-3 grams per fox can be), through the stimulating stimuli to promote the full group of sexual excitement, to achieve immediate heat, timely breeding purposes. Second, the female fox estrus and breeding 1, estrus Symptoms fox estrus, silver and black foxes generally in mid-January to mid-March; Arctic fox in mid-February to late April. The fox is easy to grasp. The male fox entering the estrus period is active, tending to the opposite sex, decreasing feed intake, frequently urinating, and the “fox-scented” taste in the urine is increased. When the female fox enters the female fox, the male fox shows great interest in it and keeps climbing. Cross-female foxes, such as female foxes, can reach a successful match when they are in heat. The identification of female fox's estrus is complicated. Commonly used identification methods, external genital observation methods, put-to-face test method, vaginal smear method, intriguing feeling method, estrus symptoms: female foxes show loss of appetite and climb caged doors. During the prosperous yin period, the vulva is elliptical, the labia valgus evacuates, the color darkens, the vulva can be seen with slight wrinkles, and the individual vulva flows out of the curd-like secretions. If the female fox is placed in a public fox cage at this time, the female fox will automatically raise the tail. Accepting the climbing of the male fox is the best estrous breeding period. 2, breeding methods fox breeding methods, can be natural mating and artificial insemination two. The natural mating method is further divided into cage feeding and artificial mating. The cages raise the mating, save manpower, and have a small workload. However, using more foxes results in wastage of feed, difficulty in grasping the expected date of production, and incapability of mastering the fox's ability to mate. It is not commonly used in China, but in the later stages of mating, This method can be used late, not in estrus or for female foxes that do not accept mating. Artificial breeding is a major method adopted by the domestic fodder industry. Normally, male and female foxes will raise their estrus foxes in a single cage for mating. If the female fox is small, the male fox with strong breeding ability can be mated into the female fox cage. Artificial insemination is the collection of male fox sperm by artificial means, and then the processed semen is fed into the uterus of the estrous female fox so that the mother fox can be given birth. Artificial insemination is an advanced technology that China has rapidly promoted and applied. Its advantages are: 1 can use the proliferation of excellent species of fox genes and breed improvement; 2 improve the breeding ability of excellent foxes, foxes natural mating general 3-5 female fox, artificial insemination. A female fox can inseminate 30-100 female foxes; 3 is suitable for the crossbreeding of foxes and arctic foxes to produce blue foxes; 4 saves some foxes: 5 reduces the chance of disease transmission; 3 solves the problem of natural mating. With difficulty, malformation, vaginal stenosis and other issues. 3, semen quality testing Gong Fox semen quality is good or bad can guarantee the quality and high yield of female fox. Therefore, the first breeding should be timely inspection of male fox sperm. With a straw of 15 cm in diameter and 0.8 to 1 cm, after sterilization, gently insert a freshly mated female fox about 5-7 cm from the vagina to take a little semen for routine microscopic examination. The sperm density is high and the vigor is strong in the visual field. Most of them are linear movements, no deformities, and clear head and tail, indicating that the quality of semen is normal and that the male fox can participate in breeding. The semen quality test can be used to discover the male fox with poor semen quality and lack of sperm, so that it can be replaced or stopped in time. The used female fox must use the fox with good semen quality to supplement the fox in time to avoid empty foxes. Third, the management of the breeding period 1, the mating time. The estrus time of the fox is closely related to the temperature of the sunshine. In terms of individuals, the estrus time has a certain regularity. Early female foxes with early estrus are early every year. The general difference is not 5-7 days. The difference in feed nutrition and management techniques also has a certain impact on the mating of foxes. In terms of groups. The high fodder mating period of the fox is about 20 days earlier than that of the fox, and it is concentrated in about 30 days from the end of February to mid-March. The fox was born earlier and the mating time was concentrated. In mid-March to late April. The female fox, who was late in her estrus, has experienced difficulties due to the gradual warming of the weather. Late mating with late litter foxes, the survival rate of pups is also low. Late female foxes, when selecting breeding foxes, can be properly eliminated. 2. Put the right time for the fox. According to studies, it is good to have a high mating success rate in the morning of the day: generally, it is played right from 5:30 to 7:30 in the morning. Rainy weather is also available from 3pm to 5pm. It's not easy to observe at night. The male fox can be used twice a day for mating, and the time interval should be more than four hours. The estrus mother foxes are compounded several times; the female estrus in the mid-term estrus should be spotted; the mother foxes in the late estrus should be mobilized, which can increase the fertility rate and birth rate. When you put it right, you should put the female fox in the male fox cage according to the female fox yin gate “Pink early, Violet black, Dark red, and moist”. Put the female fox quietly and wait for the male fox to climb. Most of the pairs can be pregnant, and at the same time pay attention to the movement of the female fox. "The female fox stands steady, his tail scratches, and the male fox does not bite across the mother. At this time, the mating is just right. The first time there is compounding three or four times. The output is high with low output." "Yummao ovulation period, male and female put The most appropriate, do not have too many mating times, 3 - 4 times that can be, once the pregnancy is also possible to register, with a few more than a litter, only one time a year, do not miss this time." "Yin Wet, dry and not put right, put it right is not pregnant. "We can learn from these experiences. 3. Age-matching The first-born mother-female fox should be selected as an adult male fox, and the mother fox must be selected as a young male fox. To be with the old, small with the evening, not old with small. This breeding method can increase fertility. According to experience, there are many male prostitutes at the beginning of the public sector, and there are more mothers with birth mothers. 4. Follow-up observation Throughout the season of estrus and breeding, the husbandry and management staff must carefully observe the foxes and discover that there are foxes in the estrus. They must be released in due course and do not miss the opportunities for breeding. In the case of female foxes with hidden estrus, trial matches must be done to prevent missed matches and mismatches. 5, remain quiet and foolish sex surviving, natural alertness, paranoid suspicious, easily frightened. The "stress" response is particularly sensitive during the breeding season, especially during pregnancy and lactation. The physiological tension, discomfort and behavior caused by "stress" directly affect the reproductive survival rate. Therefore, it is very important to create a comfortable environment and prevent the occurrence of undesirable "stress" factors. Therefore, during the breeding period of the entire breeding period, it is necessary to keep the field quiet, fix the rearing staff, decline the visits of outsiders and idlers, and prohibit the sound of all vehicle motors from entering the fox field. The husbandry and management personnel must take care of them and strictly prohibit running foxes. 6, set up a file card, do a good job in recording each fox to establish a file card work. Number 1 fox 1 card in order of each fox match to create a file. The date of birth, the number of the current year, the number of the previous year, the breeding time of the previous year, the number of litters of the previous year, the parental origin, the breeding time of the year, and the number of litters. Basic information such as the number of spouses is recorded for future reference. 7, pre-preparation work fox's gestation period is generally 51-52 days. About 0.5 ml of progesterone is injected about 8 days after mating, which promotes its tocolysis and miscarriage. After the progesterone is injected, it can be placed in the production cage, and the production box door must be closed. The maternal fox should be opened three days before the childbirth to allow the mother fox to enter the farrowing box. The litter box must be carefully disinfected. The production box should be kept warm, and all gaps should be blocked to prevent the cold wind from intruding. There should be grass bedding in the production box to prevent sudden cold currents.

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