Method for identifying sexual maturity of parent fish of schizothorax

Abstract

The invention discloses a method for identifying the sexual maturity of parent fish of schizothorax. The method is characterized by comprising the following steps of fishing healthy male and female parent fish reaching sexual maturity from a parent fish culture pond in a mating season of the schizothorax; scooping up the fish in a pre-prepared container or a fish clamp; watching the rostral side of the head part of the fish through naked eyes, and determining that fish with bead stars is male fish and the fish without the bead stars is female fish. By adopting the method for checking the caudal peduncle of the male and female parent fish by adopting a magnifying lens, the method has the advantages that distinguishing on fish sexual maturity is accurate and fast, the fish is not damaged, the operation is convenient, and the method can be easily mastered.

Description

technical field [0001] The invention relates to the technical field of production methods, in particular to a method for identifying the sexual maturity of Schizothorax broodstock. Background technique [0002] When judging the sexual maturity of male and female broodstock of fish, it is generally during the breeding season of the fish that the body of the female fish is upward, slightly exposed to the water surface, and the outline of the ovary is clearly visible on both sides, and the abdomen is soft and elastic by light pressing with hands; The "pearl star" is obvious and has a strong rough feeling. The abdomen of the fish body is upward, and when the sides of the abdomen are lightly pressed, there will be milky white thick semen flowing out, which will disperse quickly when it meets water; The ultra-examination method further accurately judges the sexual maturity of female fish in order to obtain the best induced labor effect. The above methods have the following proble...

AI Technical Summary

Problems solved by technology

The above methods have the following problems: 1. It is easy to misjudgment, especially for female fish. If the nutritional value of the feed is good, the plumpness of the fish is good, and the body fat content is high. Unclear; while the broodstock with poor sexual maturity, the belly of the fish is also soft and elastic

Therefore, the broodstock with poor sexual maturity is often regarded as the parent fish with good sexual maturity for oxytocin, but the broodstock with good sexual maturity does not induce labor, resulting in poor oxytocin effect and affecting the success rate of oxytocin; 2. Inaccurate judgment: especially male fish "Pearl Star" has to experience the process of occurrence, development and shedding. During the whole process, it is not obvious when it just rises, but it is more obvious at other times until it falls off. There is a process, the "strong roughness" is the strongest before the "bead star" falls off, but the male fish is overripe at this time, the most important thing is when the male fish has the ability to touch water quickly Scattered milky white thick semen, and did not explain clearly, it is impossible to check at any time, incorrect grasp will directly affect the fertilization rate and hatching rate; Fish, the technology is not easy to master; 4. B-ultrasound identification is not only time-consuming, but people who are not professionals or have no rich practical experience may not be able to judge its accuracy

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