Winter refers to December to March of the following year, which lasts for 4 months. At this time, Fox is in the final stage of preparation (December to mid-January) and breeding (mid-January to March). Correct feeding and management is the key to ensure the normal development, maturation and high-yield rate of fox organs, such as improper feeding and management, prone to the occurrence of estrus and estrus disorders. Therefore, we should do a good job in feeding management from the following aspects.
First, make a good selection of skin work and populations.
After maturation of winter hair, it is necessary to timely take skin and finalize the group. When selecting a fox, the fox examines the size and elasticity of the testicles and descends to the scrotum; the fox checks the position and shape of the genitalia. Should be eliminated cryptorchidism, single testicles and two testicles stuck to the shape of the public fox and vulva, abnormal position of the abnormal female fox. For individuals who do not have enough hair change, are not large enough in body shape, are not strong enough in growth, have good coat color, and have self-bite symptoms, they must be resolutely removed.
The appearance of the mature fur looks long and even, especially the hips and tail hairs are long and thick, and the body is full of hair, shiny, plush, and fluffy hair; when the fox walks around and turns, the plush appears. Obvious "cracking". After separating the plush, if you see the skin is blue, the skin is light blue, indicating that the fur is not mature; if the skin is light blue or rose, the skin is clean white, indicating that the skin is mature, can be skinned .
Second, ensure feed nutrition, promote reproductive organ development.
The fox's nutrient needs are higher than the skin beasts, and require higher protein levels, but the energy level needs to be low, and the medium condition can be maintained slightly. The fox requires 418KJ of metabolizable energy daily, 8g/kg body weight or more of digestible protein, and 5 to 10mg of VE. Only in this way can the development of sexual organs be guaranteed.
The silver fox begins in mid-November. The Arctic fox is approaching the breeding period from mid-December. The nutritional level of the diet requires 418 KJ (100 kcal) of metabolizable energy per day. The digestible protein must reach 10 g/kg body weight. 10-15mg per day. Silver and black foxes are given 30 mg VE every month in January and Arctic fox to February, and Finnish foxes only need VE 50 mg daily. Only by reaching the above nutritional level can the fox's normal estrus and breeding be guaranteed. In order to ensure normal fox winter growth and development, the recommended nutrient levels and feed ratios are shown in Table 1-3.
During this period, in addition to feeding the full price of nutrients, according to the body condition of the fox, the fox's feed intake is also grasped to prevent the body from becoming over-fat.
Third, adjust the body condition.
This work begins after the autumnal equinox. Balanced adjustment of the body condition of the animals, the public fox adjusts to the upper-middle-scale lye body condition before mating, and the female fox adjusts to a medium-level lyrical condition, ie, the silver fox fox weighing 5.5-7.5kg and the female fox 5.0-6.5. Kg; Arctic Fox fox body weight 8~10kg, female fox body weight about 6~7kg.
Fourth, increase lighting and exercise.
Light is an indispensable environmental factor in fox reproduction. To promote the normal development of animal organs, it must be kept in the natural environment of Chaoyang and cannot be placed in a dark room or in a small hole.
A variety of ways can be used to promote the movement of foxes, increase the amount of activity, and increase the appetite of the fox, and the body is robust. Sports can make normal foxes heat estrus, sexual desire is strong, improve the ability of the public fox matching, so that the female fox smooth breeding.
Fifth, make preparations before mating.
1 estrus identification. The purpose of the estrus inspection is to accurately grasp the estrus symptoms of the breeder, in order to achieve timely breeding. From January, the female genitalia was observed every 5 days or 1 week, and the changes occurred were recorded. The change process of the female fox can be divided into three stages:
The first stage: the vulva begins to swell, the pubic hair separates, the clitoris increases; The female fox has the performance which tends to the opposite sex and the sexual excitement, allows the public fox to chase sniffing, but does not accept to climb, this stage generally lasts 2 to 3 days.
The second stage: The vulva is obviously swollen, close to a circle, has elasticity, the clitoris is larger and pink; the female fox is very excited and active, playing with the fox and chasing, but is unwilling to accept cross-breeding, even if the forced mating, the conception rate is also Very low, this stage generally lasts 1 to 3 days.
Stage 3: The vulva is swollen and round. The labia is valgused. The elasticity becomes smaller and the color changes to deep red. White or yellowish mucus or curdled secretions appear. The female fox continues to be excited and stands when the fox approaches. The tail is tilted to one side to receive mating. This phase is the ovulation period of the female fox, and is also the best period for mating, generally lasting 2 to 3 days. 2 heterosexual stimulation. In the later stages of preparation for breeding, the male and female foxes are spaced apart from each other to extend the contact time between male and female foxes to stimulate gonad development. However, the stimulus should not be premature (just in January) to prevent the public fox from prematurely reducing appetite and affecting the constitution.
3 breeding programs and preparations. Before the start of breeding (in early January), personnel arrangements and training should be well done to formulate matching programs, production indicators and other work. Such as the development of breeding programs, view the genealogy and fill in the survey form, to prevent close relatives and mating; record cards in advance, grasping forceps, trapping nets, gloves, microscopes and other mating tools; check the health status of fox species, found that the disease fox Timely isolation, serious treatment, and strive to restore health as soon as possible to ensure timely breeding.
Sixth, breeding.
1 Select the best breeding time. Studies have shown that the success rate of mating in the morning is high: Normally, it is right at 5:30 am to 7:30 am, and it can be put at 15 to 17 o'clock on rainy days. The estrus mother fox must be compounded several times, and the middle-aged estrus mother fox should be able to look for a stable match. The late estrus mother fox should have more repetitions, which can increase the fertility rate and birth rate. At the same time, it is necessary to observe the movement of the female foxes: the female fox stands steadily, and the tail floats on one side. The female fox does not bite when the male fox climbs. At this time, breeding is just right. The initial allocation of compounding three or four times, low yield to high output.
2 master the correct breeding operation method. According to the mating plan, it should be put right at the right time, and the estrus fox should be placed in a public fox cage to prevent outside interference. The mating staff should immediately leave and watch in the dark. Normally, the match can be reached within 30 to 45 minutes, and the basket can be divided afterwards. If the match is not reached within 1 hour, replace the public fox immediately. In order to ensure abortion and increase the rate of quasi-childbirth, whether it is a cross or artificial insemination, it must be re-arranged the next morning. If conditions permit, on the third day, other species of foxes can be selected to match once, which can maximize the breeding rate. During the breeding period, any disturbances should be avoided during the breeding period. The cage should pay attention to maintenance and prevent running fox. Ensure adequate and clean drinking water and do a good job in breeding records. During the breeding period, the male foxes are properly used, and attention is paid to the protection of excellent male foxes with strong breeding ability and poor appetite.
3 do semen quality checks. The quality of male fox sperm is the key to the quality and high yield of female foxes. Therefore, foxes in the initial and final stages should be examined by the microscope. In particular, male foxes that have repeatedly mated should be tested for semen in time to ensure the pregnancy rate of female foxes. Birth rate. The amount of qualified male foxes was 0.5-2.5 mL, the number of sperms was 3-600 million, and the vigor was greater than 0.7. Frequency of normal sperm extraction: Semen collection once every 1~2 days, or once per day, 2~3 days of continuous rest 1~2 days. After semen collection, semen quality should be checked. If the vitality is lower than 0.7 and the deformity rate is higher than 10%, the fertility rate of the female fox will be significantly reduced.
First, make a good selection of skin work and populations.
After maturation of winter hair, it is necessary to timely take skin and finalize the group. When selecting a fox, the fox examines the size and elasticity of the testicles and descends to the scrotum; the fox checks the position and shape of the genitalia. Should be eliminated cryptorchidism, single testicles and two testicles stuck to the shape of the public fox and vulva, abnormal position of the abnormal female fox. For individuals who do not have enough hair change, are not large enough in body shape, are not strong enough in growth, have good coat color, and have self-bite symptoms, they must be resolutely removed.
The appearance of the mature fur looks long and even, especially the hips and tail hairs are long and thick, and the body is full of hair, shiny, plush, and fluffy hair; when the fox walks around and turns, the plush appears. Obvious "cracking". After separating the plush, if you see the skin is blue, the skin is light blue, indicating that the fur is not mature; if the skin is light blue or rose, the skin is clean white, indicating that the skin is mature, can be skinned .
Second, ensure feed nutrition, promote reproductive organ development.
The fox's nutrient needs are higher than the skin beasts, and require higher protein levels, but the energy level needs to be low, and the medium condition can be maintained slightly. The fox requires 418KJ of metabolizable energy daily, 8g/kg body weight or more of digestible protein, and 5 to 10mg of VE. Only in this way can the development of sexual organs be guaranteed.
The silver fox begins in mid-November. The Arctic fox is approaching the breeding period from mid-December. The nutritional level of the diet requires 418 KJ (100 kcal) of metabolizable energy per day. The digestible protein must reach 10 g/kg body weight. 10-15mg per day. Silver and black foxes are given 30 mg VE every month in January and Arctic fox to February, and Finnish foxes only need VE 50 mg daily. Only by reaching the above nutritional level can the fox's normal estrus and breeding be guaranteed. In order to ensure normal fox winter growth and development, the recommended nutrient levels and feed ratios are shown in Table 1-3.
During this period, in addition to feeding the full price of nutrients, according to the body condition of the fox, the fox's feed intake is also grasped to prevent the body from becoming over-fat.
Third, adjust the body condition.
This work begins after the autumnal equinox. Balanced adjustment of the body condition of the animals, the public fox adjusts to the upper-middle-scale lye body condition before mating, and the female fox adjusts to a medium-level lyrical condition, ie, the silver fox fox weighing 5.5-7.5kg and the female fox 5.0-6.5. Kg; Arctic Fox fox body weight 8~10kg, female fox body weight about 6~7kg.
Fourth, increase lighting and exercise.
Light is an indispensable environmental factor in fox reproduction. To promote the normal development of animal organs, it must be kept in the natural environment of Chaoyang and cannot be placed in a dark room or in a small hole.
A variety of ways can be used to promote the movement of foxes, increase the amount of activity, and increase the appetite of the fox, and the body is robust. Sports can make normal foxes heat estrus, sexual desire is strong, improve the ability of the public fox matching, so that the female fox smooth breeding.
Fifth, make preparations before mating.
1 estrus identification. The purpose of the estrus inspection is to accurately grasp the estrus symptoms of the breeder, in order to achieve timely breeding. From January, the female genitalia was observed every 5 days or 1 week, and the changes occurred were recorded. The change process of the female fox can be divided into three stages:
The first stage: the vulva begins to swell, the pubic hair separates, the clitoris increases; The female fox has the performance which tends to the opposite sex and the sexual excitement, allows the public fox to chase sniffing, but does not accept to climb, this stage generally lasts 2 to 3 days.
The second stage: The vulva is obviously swollen, close to a circle, has elasticity, the clitoris is larger and pink; the female fox is very excited and active, playing with the fox and chasing, but is unwilling to accept cross-breeding, even if the forced mating, the conception rate is also Very low, this stage generally lasts 1 to 3 days.
Stage 3: The vulva is swollen and round. The labia is valgused. The elasticity becomes smaller and the color changes to deep red. White or yellowish mucus or curdled secretions appear. The female fox continues to be excited and stands when the fox approaches. The tail is tilted to one side to receive mating. This phase is the ovulation period of the female fox, and is also the best period for mating, generally lasting 2 to 3 days. 2 heterosexual stimulation. In the later stages of preparation for breeding, the male and female foxes are spaced apart from each other to extend the contact time between male and female foxes to stimulate gonad development. However, the stimulus should not be premature (just in January) to prevent the public fox from prematurely reducing appetite and affecting the constitution.
3 breeding programs and preparations. Before the start of breeding (in early January), personnel arrangements and training should be well done to formulate matching programs, production indicators and other work. Such as the development of breeding programs, view the genealogy and fill in the survey form, to prevent close relatives and mating; record cards in advance, grasping forceps, trapping nets, gloves, microscopes and other mating tools; check the health status of fox species, found that the disease fox Timely isolation, serious treatment, and strive to restore health as soon as possible to ensure timely breeding.
Sixth, breeding.
1 Select the best breeding time. Studies have shown that the success rate of mating in the morning is high: Normally, it is right at 5:30 am to 7:30 am, and it can be put at 15 to 17 o'clock on rainy days. The estrus mother fox must be compounded several times, and the middle-aged estrus mother fox should be able to look for a stable match. The late estrus mother fox should have more repetitions, which can increase the fertility rate and birth rate. At the same time, it is necessary to observe the movement of the female foxes: the female fox stands steadily, and the tail floats on one side. The female fox does not bite when the male fox climbs. At this time, breeding is just right. The initial allocation of compounding three or four times, low yield to high output.
2 master the correct breeding operation method. According to the mating plan, it should be put right at the right time, and the estrus fox should be placed in a public fox cage to prevent outside interference. The mating staff should immediately leave and watch in the dark. Normally, the match can be reached within 30 to 45 minutes, and the basket can be divided afterwards. If the match is not reached within 1 hour, replace the public fox immediately. In order to ensure abortion and increase the rate of quasi-childbirth, whether it is a cross or artificial insemination, it must be re-arranged the next morning. If conditions permit, on the third day, other species of foxes can be selected to match once, which can maximize the breeding rate. During the breeding period, any disturbances should be avoided during the breeding period. The cage should pay attention to maintenance and prevent running fox. Ensure adequate and clean drinking water and do a good job in breeding records. During the breeding period, the male foxes are properly used, and attention is paid to the protection of excellent male foxes with strong breeding ability and poor appetite.
3 do semen quality checks. The quality of male fox sperm is the key to the quality and high yield of female foxes. Therefore, foxes in the initial and final stages should be examined by the microscope. In particular, male foxes that have repeatedly mated should be tested for semen in time to ensure the pregnancy rate of female foxes. Birth rate. The amount of qualified male foxes was 0.5-2.5 mL, the number of sperms was 3-600 million, and the vigor was greater than 0.7. Frequency of normal sperm extraction: Semen collection once every 1~2 days, or once per day, 2~3 days of continuous rest 1~2 days. After semen collection, semen quality should be checked. If the vitality is lower than 0.7 and the deformity rate is higher than 10%, the fertility rate of the female fox will be significantly reduced.
Led Facial Mask,Led Light Facial Mask,Led Therapy Facial Mask,Led Facial Skin Care Mask
Shenzhen Jie Zhong Lian Investment Co., Ltd. , https://www.meizons.com