The selection of black dolphin species

The selection of black dolphin species

In black dolphin breeding, good individuals must be selected as parents. The reference criteria are as follows:

1. The body is plump and long, the nutrition is good, and the bones are strong and strong.

2. The hair color is bright and the coat is clean and dense.

3. The body is streamlined and the head, neck, chest, abdomen and buttocks are compact. Quick and lively in action.

4. Bright eyes, no secretions. The nose is damp and there is no hair removal. Breathing is steady.

5. The skin is soft and elastic, without skin disease.

6. the testes of male rats are symmetrical, the skin of scrotum is meticulous, and the development of penis is normal. The female rats had clean vulva, well-developed breasts and prominent nipples. According to the characteristics of each strain, the 2-5 offspring of parents with strong physique, strong vitality and strong disease resistance were selected to keep the seed, and the offspring with poor growth were eliminated in time. The breeding and management of guinea pigs is basically the same as that of breeding mice, but we should pay attention to moderate nutrition so as not to become overweight and lead to infertility.

7. Maintain the exuberant production capacity of the population. Breeder rats can be eliminated when they have been used continuously for 12 months or 18 months. For those who are weak and sick, they should also be eliminated in time. For guinea pigs with excessive consumption caused by production (such as hair loss and emaciation), breeding should be stopped and allowed to rest for a period of time before production.

8. Record. The records in the production of guinea pigs are basically the same as those of mice. The individual records of monochromatic guinea pigs can be recorded by ear number, and the records of polychromatic guinea pigs can be recorded by different positions of body surface coat color distribution.