Techniques for breeding high yield of farmed mink

Selection and retention of breeding minks: In November of each year, breeding minks with good varieties, large body shape of more than 2000 grams and slightly better hair are selected and raised separately according to the ratio of male to female of 1:3. In order to ensure the quality of litter, vaccination is carried out once a year in December. Pre-breeding vaccination:

One is to prevent canine distemper, with mink canine distemper attenuated vaccine subcutaneous injection, each 1 ml, immunity period of 6 months.

The second is anti-viral enteritis, using mink viral enteritis tissue culture inactivated vaccine, each mink subcutaneous injection of 1 ml, immunity period of 6 months, injection of the best one mink with a needle to prevent injection infection. Nutrition before mating: winter solstice season began to increase sunshine, mink reproductive organs began to develop, male mink scrotum obviously droop, testicular volume significantly increased, sperm began to develop. The number of primordial follicles in the ovary of female mink increased, the follicles also increased significantly, and the uterine body enlarged and thickened. Therefore, nutrition should keep up with physiological needs, in addition to ensuring animal protein, plant protein, but also increase vitamins, especially fat-soluble vitamins, such as VA, VE, VE tablets, carrots or peanut oil and VC tablets can be added to the feed to promote normal development of reproductive organs.

Seize the opportunity of estrus: (1) The male mink estrus period is January-March, and the normal male mink always maintains the mating state and is interested in the female mink. After the vernal equinox, with more than 12 hours of sunshine, the testicles begin to atrophy and degenerate.

(2) Female mink estrous cycle can have 2-4, cycle can be divided into 4 periods, namely prophase, estrous period and rest period. Each cycle is approximately 6 - 10 days and lasts 1 day. The rest period is 5 - 6 days. Female minks have no mature follicles in their ovaries and do not accept mating. Forced mating will not conceive. Therefore, we must seize the estrus observation, mating in the breeding season after the compound or cycle compound to ensure that the pregnancy rate is high.

Seize the breeding date: (1) The end of February and the beginning of March are the breeding season for most minks, and the breeding date should be arranged according to the number of male minks.

(2) Most female minks should adopt primary mating, that is, mating in the first estrous period. From breeding to peak breeding period is about 5 days? At the same time, young male minks were trained to participate in breeding, and semen quality identification was carried out to select excellent breeding minks.

(3) During the breeding period of about 10 ~12 days, the female mink of the first mating shall be compounded once and the breeding period shall be ended.

(4) Re-mating of non-pregnant minks at the beginning of breeding period, about 5 days after the end of breeding peak period. For female minks still showing oestrus and suspected of not being pregnant or mismating, supplementary mating can be carried out in this period, and continuous supplementary mating mode can be adopted, that is, mating once every other day after the first time. Inseminate every female mink and have a high litter rate.