Method for screening and separating high-quality fry and poor-quality fry in batches

Abstract

The invention discloses a method for screening and separating high-quality fry and poor-quality fry in batches, belonging to the method for screening and separating the fry, which aims to provide a method for screening and separating the high-quality fry and the poor-quality fry. The method is carried out in a circular way and is characterized in that a straight way on the left side of the circular way is respectively provided with a front baffle plate and a rear baffle plate, and three slip grooves are arranged between the front baffle plate and the rear baffle plate; and a diving pump, an inflating head and a heating rod are put in a straight way on the right side of the circular way. When the fry are screened and separated, the speed of the water flow is maintained at about 1cm / s so as to form a clockwise water flow in the circular way. The fry is put in water adjacent to the front baffle plate, and the speed of the water flow is gradually changed so as to ensure that the fry with poor physique swim to the rear baffle plate with the water flow, and the fry with good physique still stay at the front baffle plate. After the fry are steadily distributed on the left straight way, movable baffle plates are rapidly inserted at the three slip grooves. The fry adjacent to the front baffle plate have the best physique, the fry adjacent to the rear baffle plate have the poorest physique, and the high-quality fry are fished out and put in a culture pond for culturing.

Description

technical field [0001] The invention belongs to the technical field of aquaculture, and relates to a batch rapid quality identification, screening and separation method for fish fry with top flow characteristics. Background technique [0002] Fish is a large family of marine organisms, the main fishing target in fishery production and an important source of high-quality animal protein for human beings. In recent years, with the decline of fishery resources, fishery production has shifted from fishing to aquaculture. Fish seed is an important material basis for fish farming. The quality of fish seed is directly related to the output of fish farming. Therefore, farmers attach great importance to the quality of fish seed and hope to select the best seed Only in this way can the survival rate and growth rate of fish in the breeding process be improved. [0003] Usually the method of identifying fish quality includes the following steps: first look at the body color, the body c...

AI Technical Summary

Problems solved by technology

[0005] Many fishes have the characteristics of top flow and like to hold their heads against the water flow, such as barracuda, which will swim against the direction of the water flow, but this kind of top flow swimming requires a lot of energy, and only fry with good physique can do it. However, inferior seedlings have poor swimming ability and can only swim downstream, unable to swim.

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