Indoor flatfish fry harvesting and grading device

Abstract

The invention relates to the field of aquaculture equipment, in particular to an indoor flatfish fry harvesting and grading device which includes two harvesting device rod handles which are cross andhinged to the position of a harvesting device rotating shaft, each harvesting device rod handle is divided into a front end and a rear end with the harvesting device rotating shaft as the boundary, the rear end of the harvesting device rod handle is provided with a harvesting device handle, and the front ends of the two harvesting device rod handles are fixedly connected to the left side and the right side of a harvesting device bottom net with an arc-shaped bottom surface, respectively; the bottom surface of the rear end of the harvesting device bottom net is provided with a through hole, thethrough hole is communicated with the top of a harvesting device net bag, and the harvesting device net bag includes a harvesting device screen and a barrel-shaped harvesting device side net which isthrough up and down and formed by extending downwards along the periphery of the through hole, the harvesting device screen is detachably arranged on the inner side of the bottom end of the harvesting device side net, and the size of each mesh of the harvesting device screen is 10-50 times that of each mesh of the harvesting device bottom net. The indoor flatfish fry harvesting and grading devicecan be operated by a single person, fries are effectively screened, the indoor flatfish fry harvesting and grading device is high in operation capability and efficiency, and the damage to the fries is small.

Description

technical field [0001] The invention relates to the field of aquaculture equipment, in particular to an indoor harvesting and grading device for flounder fry. Background technique [0002] In the biological world, there is a behavior of killing each other or cannibalism among the same kind of creatures, which is called self-mutilation phenomenon. This phenomenon is relatively common. Its strict definition is to cause the death of the swallowed person by partially or whole swallowing other individuals of the same kind The phenomenon. This phenomenon is also commonly found in fish, and when it occurs in some economically important species, it will cause great economic losses. [0003] Considering the maximization of economic benefits, it is inevitable that there will be high density of fish farming in the process of industrial farming. In this case, the growth differences among many fishes will cause some young fishes to be unable to obtain and grow with each other. Correspo...

AI Technical Summary

Problems solved by technology

[0005] The current technical solution is to use a screen to screen the fry from the large to the small, but it is very time-consuming to screen the fry in the entire fish pond, and the screen will also cause damage to the fry; The sieving device has been designed for features such as crowding and escape, so that although the original sieving method has been improved to some extent and the efficiency has been improved, it is necessary to remove the fry from the pond and place them in the device just like the earliest sieving method. In this process, the probability of damage to the fry is increased, and when the sieving device is also installed, it is not only a waste of time but also troublesome and labor-intensive to operate.

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