67 results about "Hatchery" patented technology

The invention discloses a visual inspection grading device and a visual inspection grading method for survival rates of eggs incubated in groups, and relates to the technical field of egg processing grading. A machine vision technology is used for acquiring images of the incubated eggs, the images are subjected to a series of processing, and the survival rates of the incubated eggs are judged according to color characteristics of the incubated eggs. The device is structured in a way that the incubated eggs in standard egg trays of a hatchery are vertically arranged in egg holes of the standard egg trays; light sources with rubber rings are positioned under the incubated eggs; the standard egg trays of the hatchery are positioned on an egg machine conveyor belt; an industrial camera is positioned over the egg machine conveyor belt; a photoelectric sensor is positioned just under the egg machine conveyor belt, and is connected with the industrial camera through a data line; and the industrial camera is connected with a computer through a data line. The device and the method are high in efficiency and intelligence, and the labor intensity is reduced; and human eyes are replaced by a machine, so that the device and the method can be adapted to the modern automatic inspection industry, and have broad application and popularization prospects.

The invention discloses a smelt artificial propagation method. From the early June, the fodder containing more fish meal protein is used for the feeding of female parent fishes. While from the middle of September, the female parent fishes are fed on the fodder containing spirulina powder and aluzyme. After the parent fishes enter the gonad mature period, the better mature female parent fishes are selected and cultivated after the estrualization, and the sexually mature male parent fishes are selected and cultivated after the estrualization. After the cultivated parent fishes reach more than 60 % gonad maturity, the water temperature of a decorporation pool is dropped continuously for 2 days with the decline of 2 degree each day. Afterwards the constant temperature is kept for 4 to 6 days. During the ovulatory period of parent fish, the ovums and the sperms are artificially collected every two days. The dry artificial insemination method is used to obtain a germ cell, and the germ cell is put in a hatchery pond for breeding. With the invention, the smelt sverage absolute fecundity and the fertility rate can be enhanced, and a great number of fry can be obtained in each breeding. The scale of artificial propagation is increased, and the labour intensity of the artificial propagation is reduced. Thus a foundation for the large scale artificial culture of smelt is established.