39 results about "Hucho taimen" patented technology

The invention discloses a method for fast and physically distinguishing the quality of mature ova of hucho taimen and relates to a physical evaluation method for the quality of the ova of hucho taimen. The method aims to solve the technical problems that in the existing multiplicative process of hucho taimen, the mature ova are evaluated by operators through intuitionistic senses from experience, the ova of hucho taimen cannot be evaluated at the early stage fast and accurately, consequently, the fertility rate and the hatchability decrease, and the membrane rupture offspring seed malformation rate and the floating offspring seed death rate increase. According to the method, the pubescent female parent fishes of hucho taimen are narcotized, the mature ova are extruded to a spawning basin containing an ovum buffer cleaning solution for trout from the abdominal cavities of the fish bodies, the average weight of the fish ova and the dispersion coefficient of the average weight, the average diameter of the fish ova and the dispersion coefficient of the average diameter and the average distribution density of fat droplets of the fish ova are measured, judgment is made on the basis of the physically-measured values to divide the fish ova into the superior grade, the medium grade and the inferior grade, the judgment can be completed in 1.5h, and the method has the advantage of being capable of being used for distinguishing the quality of the ova conveniently at the early stage. The method can be used in the field of aquaculture of hucho taimen.

An artificial culture and domestication method for a fingerling of Hucho taimen relates to the aquatic product culturing field which solves the problem that the current culturing technology is not suitable for the fingerling of Hucho taimen and can be finished by the following four phases: 1. cleaning a hatching slot 2 to 10 times a day and picking out dead eggs, dead fingerling and egg skin; 2.feeding zooplanktons for 4 to 7 days and 6 to 8 times one day; 3. feeding the zooplanktons and water earthworms for the first 3 to 5 days; then feeding the water earthworms for 4 to 5 times a day forthe next one week; then feeding massive materials once every morning for three weeks and feeding the water earthworms in the daytime and at night for 4 to 5 times a day; 4. feeding artificial feedstock in the morning and massive materials in the daytime for 2 to 3 times a day and the water earthworms at night during the first 2 to 3 weeks; and feeding the artificial feedstock for 3 to 4 times a day by every 2.5 to 3 hours for one time and feeding the water earthworms at night after the next 2 to 4 weeks; feeding the artificial feedstock four times a day for the last 15 days and finishing the domestication work. The domestication method of the invention has the advantages of simple and convenient operation, low cost and good domestication fingerling quality.

The invention discloses a transportation device for fertilized eggs of Chuanshan Zheluo salmon, which comprises an outer box body, an inner box body and a box cover, the inner box body is arranged inside the outer box body, and the outer box body is connected with the inner box body through a buffer device. The buffer device is arranged on the side wall and the bottom surface of the inner box body, and a buffer plate is detachably connected to the inside of the inner box body. The device can effectively solve the problem that fertilized eggs are easily vibrated during field transportation at present, resulting in a low hatching rate.

The invention discloses a complete extruded formula feed for Hucho taimen and a preparation method thereof. The complete extruded formula feed is made from the following raw materials: fish meal, cottonseed protein powders, fermented bean cake, bread flour, beer yeast, a cotton cake / rape cake mixture, calcium dihydrogen phosphate, a vitamin-mineral salt mixture, choline chloride, and dimethylpropiothetin (DMPT), wherein the cotton cake / rape cake mixture is composed of cotton cake and rape cake at a weight ratio of 1:1. The preparation method of the complete extruded formula feed for Hucho taimen comprises the steps as follows: roughly grinding large-sized raw materials to coarse powders, mixing all materials, micronizing to powders which can pass through a 100-mesh sieve, compounding, extruding to make pellets, and oven-drying. The preparation method is simple and practical and is favorable to industrial production. The complete extruded formula feed for Hucho taimen has the advantages of good palatability, high domestication speed, lower feed coefficient and good stability.

The invention provides a Hucho taimen sperm activation solution and a preparation method thereof, and relates to the technical field of sperms of Hucho taimen species. The Hucho taimen sperm activation solution comprises the following raw materials: 40.64-81.27 mmol / L of glucose and 10.12-20.24 mmol / L of sodium chloride, wherein water temperature is 8-11 DEG C and osmotic pressure is 142.41 kPa to 284.81 kPa. The method comprises: weighing pure glucose and putting the pure glucose in a beaker; weighing analytically pure sodium chloride in the mass and putting the analytically pure sodium chloride in same beaker with the weighed glucose; adding deionized water or distilled water in half volume of the activation solution in the beaker, and stirring, transferring the dissolved solution in a volumetric flask whose capacity is the same with the prepared activation solution, pouring washed solution in the volumetric flask, and finally diluting with deionized water or distilled water to a scale mark, and shaking the volumetric flask. The activation solution and the preparation method solve problems of how to prolong movement time of Hucho taimen sperms and improve fertility rate.

The invention discloses a manual spawning induction method for wild hucho bleekeri. In each year, when the water temperature of a water region for growth of the wild hucho bleekeri is 6.2-7.5 DEG C, male fishes and female fishes in natural growth are selected, the number of the fishes is counted, and the fishes are weighed; a spawning induction medicine composition diluted with glucose is injected into the 1 / 3 position of the base portion of the pectoral fin of each female parent fish according to 0.4 mL / kg, and then the female fishes and the male fishes are bred in a pool according to the proportion of 2-3:1, and stimulated with running water constantly; after 10-11 hours of stimulation with the running water, egg collection and semen collection are carried out on the female fishes and male fishes, and after spawning induction, the male fishes and the female fishes are released into a natural water region. In the scheme, while fertilized eggs are obtained, the wild hucho bleekeri parent fishes for usage can be reasonably and effectively protected; the technical problem that at the present, it is difficult to obtain the fertilized eggs by training the wild hucho bleekeri, state first-grade protection animals can be protected better, and remarkable ecological benefits are achieved.