Black guinea pigs are highly reproductive animals, but due to various factors, their reproductive potential is often not fully realized. In order to increase the economic benefits of guinea pig production, improving the fecundity of black guinea pigs is a problem worthy of attention. In order to improve the fecundity of black guinea pigs, certain measures must be taken.

1. Temperature

Ambient temperature has a significant impact on the reproductive performance of black guinea pigs. If it exceeds 30, it will lead to decreased appetite and sexual desire. reduce. Continued high temperature can make the testicles produce less sperm, or even no sperm. High temperature can affect libido, but it can recover quickly after high temperature, and it takes about two months to recover the quality of semen, because it takes about one and a half months for sperm to occur, develop to maturity and discharge. This may be the reason why the breeding conception rate is still low despite the cooler weather in the fall. However, low temperature also has a certain impact on the fecundity of black guinea pigs. The ambient temperature is 5 degrees Celsius lower, and the libido decreases. Of course, the reasons for low fecundity in the cold season, in addition to the impact of low temperature, there are nutritional factors, vitamin deficiencies caused by the lack of green fodder in winter and so on.

2. Nutrition

According to our research and testing, nutritional levels often affect follicle development and reduce ovulation rate. Observing the number of fertilized eggs implanted around the 10th day after mating, the mortality rate of embryos with low nutritional levels was 25%, while the mortality rate of embryos with guaranteed nutritional levels was only 3% to 5%.

The nutrient level is too low or the nutrition is not comprehensive, which is quite detrimental to the black fecundity. Because reproductive performance is largely affected by the function of the pituitary gland, nutritional deficiencies directly affect the function of the pituitary gland.

3. Cryptorchidism or Monorchidism

Cryptorchidism or monorchidism in male dolphins is a physiological defect, and breeding cannot make the female dolphin conceive or the rate of conception Not high because cryptorchid or mono-testicular male dolphins are unable to produce sperm or are less able to produce sperm.

4. Improper use

Temporary sterility may occur in male dolphins after the leisure period, but disappear after the first breeding. Male dolphins have not been bred for a long time, and the first mating should be compounded. If artificial insemination is used, the semen collected for the first time will be discarded. The female dolphin is empty for a long time or the first mating is too late, and the ovarian function is reduced, which often makes it difficult for the female dolphin to conceive.

5. Breeding age

The age of the breeding dolphin obviously affects its reproductive performance. Improved reproductive performance. After 2 years of age, reproductive performance gradually declines. Generally, the breeding dolphins are used for about 2.5 years, and those above 2.5 years old should not be used for breeding, except for some excellent ones.