2 results about "Artificial fertilization" patented technology

The application provides a dairy cow mating auxiliary device, which comprises two symmetrically distributed side frames, a front frame capable of clamping a neck of a cow is fixed between one end of the two side frames, the other end of one of the side frames is provided with a clamping ring with a circular ring structure, the ring wall of the clamping ring is a hollow structure, the inner ring wall of the clamping ring is made of elastic rubber material, and the ring wall of the clamping ring is connected with a gas pressure adjusting device capable of adjusting the gas pressure in the ring wall. In the artificial insemination process, the labor intensity of the staff can be reduced without artificial hand pulling of the cow tail, and the stability of the cow tail clamped by the inner ring wall is relatively high, so that the cow tail cannot break away from the clamping ring even if the cow resists and swings the tail.

This invention relates to a method for regulating the late autumn breeding of mandarin fish, belonging to the field of artificial fish breeding in aquaculture technology. The operation of this invention is as follows: (1) Inducing spawning in spring by injecting a high dose of a single oxytocin into the mandarin fish parent stock; (2) Under the action of the high dose of the single oxytocin, partial spawning is completed, achieving an average spawning volume per female fish of 20%-30% of the theoretical spawning volume in spring; (3) After spawning until the end of June, controlled feeding management is carried out to reduce the amount of feed, so that the fish are in a nutritional state of maintenance or slow growth; (4) In July and August, nutritional enhancement cultivation is carried out, and sufficient feeding is restored for a period of time before formal spawning to promote the rapid secondary development of the gonads of the parent mandarin fish; oxytocin is injected at a conventional effective dose to induce artificial insemination of the parent mandarin fish, resulting in concentrated spawning, achieving an average spawning volume per female fish of 80%-90% of the spawning volume in autumn. This invention can achieve the dual use of mandarin fish parent stock in one year through conventional hormone injection and feed management.