The individual selection Program of Fox

1 primary election

After weaning, the parents with good production performance, early birth and normal development were selected mainly according to the production performance of their ancestors. The primary baby silver black fox male fox should be born before April 5, the female fox should be born before April 10, and the primary baby arctic fox should be born before May 20. 40% more should be left in accordance with the seed retention plan during the primary election.

The selection of adult male foxes is carried out after mating and the selection of adult females is carried out after the litter of foxes. Those male foxes with poor breeding ability and poor semen quality should be eliminated. Female foxes should choose those who have more offspring, strong motherhood, strong lactation, normal development of young foxes, and those who come out early and return late in estrus should be reserved for breeding, otherwise, they should be eliminated.

2 check

It should be carried out from August to September, when those adult foxes with poor physical recovery should be listed in the elimination group; choose well-developed young foxes to stay. The number of selected species should also be 20% more than the planned number of seeds.

3 selected

Before taking the skin, according to the individual quality, ancestral records and descendant quality, and focus on the fur quality, strictly select and retain, those who do not meet the requirements will be eliminated.

Large-scale farms can adopt the method of group selection, that is, to select foxes from some excellent populations to enrich other populations with poor quality, so as to improve the quality of the whole population. Of course, an excellent population is a population that has reached a good level after several generations of individuals. However, not all of them should be selected and retained, and those poor individuals with poor development and defects should also be eliminated.