How to choose a good breed for raising minks and what matters needing attention?

What is the seed selection?

Seed selection is to select good individuals for seed use and eliminate bad individuals at the same time.

How to choose a good seed?

1. Choose a good variety. A good breed is the basis for improving the litter birth rate and survival rate of minks. When introducing a variety, we must consider its adaptability, disease resistance, physiological heredity and character stability. When introducing varieties from other places, we must compare the differences in climate and natural environment between the two places, and timely and appropriately adjust their feeding and management methods.

2. Build the basic group. Seed selection generally goes through three stages: primary selection, re-selection and selection.

Primary selection: adult male minks should be selected according to their breeding ability and semen quality, and adult female minks should be selected according to their litter size, lactation, motherhood, survival number of offspring and so on. According to the litter size, development, survival and parents' quality, the mink should be selected according to the litter size, development status, survival and parents' quality. The primary is 25% and 40% more than the actual number of seeds left.

Check: from September to October. It is mainly selected one by one according to the growth and development, body size, body weight, physical strength, plush color and quality, hair changing sooner or later. The number of check-ups should be 10% or 20% more than the number of seeds left.

After the primary and re-election, the basic mink group is formed, which is usually completed by the end of October. And then make a purposeful individual selection.

3. Choose the dominant individual. Selected in November, excellent individuals were selected as male and female minks for the following year, generally 1 male and 3 females as a group. The female marten is selected from her own basic group, and the male mink is selected from the outfield to prevent inbreeding and reduce production performance.

① weight standard: male mink more than 2kg, no more than 2.5kg, female mink more than 1.2kg, less than 2kg

② fur color and density standard: sable should be black and shiny, with complete fluff and needle hair, with a plush density of more than 12000 per square centimeter; ferrets should have beautiful spots, bright body hair and complete hair change.

③ body length: 45 cm for males and 38 cm for females.

④ health status: no epidemic disease, flexible head and eye, love to move, good play, normal food and drinking water, no history of hair and tail biting.

⑤ reproductive ability: the female mink gave birth to more than 6 offspring with good motherhood, and the male mink had strong breeding ability, mating 8 female minks in one breeding period.

The age of ⑥ species: the suitable age of male mink is 2-4 years old, and some of them can be used for 6-10 years. The annual proportion is 30% in the current year and 70% in the elderly.

⑦ others: cryptorchidism of male mink, external genital deformities of female mink (genitals are far away from anus), disability (lack of legs, lack of tail, blindness, etc.) can not be reserved for breeding.

Points for attention in seed selection:

① should carefully investigate the pedigree of the introduced varieties, avoid close relatives, and establish pedigree files in this field.

② investigates the process of medication, and those with a history of drug allergy had better not be reserved for seed use.

Minks that have been treated with ③ hormones (such as melatonin) should not be kept.

Those who have not lost their summer hair in ④ should not be selected for breeding, especially the mink born in May should not leave seed.

The abnormal ratio of head to body of ⑤ can not be left seed.