Sampling device and sampling method for pond-culture flatfish

Abstract

The invention discloses a sampling device and a sampling method for a pond-culture flatfish, and belongs to the field of marine fish culture equipment. The sampling method comprises a funnel-shaped outer net cage, a large funnel net, a small funnel net, a large bamboo circle, a small bamboo circle, a stay bar, an edge line, a float line, a sinker line, a buoy, a buoy rope, a cross rope anchorage, a tail end anchorage, a tail end rope, a tail end anchorage line and a cross rope, wherein the sampling device is paved in a pond during sampling, and is taken in the next day, so that the requirements that regular sampling observation analysis is needed in the bastard halibut culture process and the sample n is greater than or equal to 30 are met; and the fish body is free of injury. The sampling device is low in price, simple in structure, easy to manufacture, and convenient to operate; the number of collected samples is ensured; the injuries to the fish body are reduced or avoided; the sample deviation is relatively small; and the condition of the pond-culture flatfish population can be really reflected.

Description

technical field [0001] The invention belongs to the field of seawater fish breeding equipment, in particular to a device and method for randomly sampling the flounder and flounder in order to observe and grasp the growth conditions of the flounder and flounder in the process of large-scale cultivation of the flounder and flounder in ponds. technical background [0002] Flounder (Paralichthys olivaceus) is also known as brown flounder because of the dark brown side of the eye, the body is oblong and flattened on the side; the two eyes are located on the left side of the head; the side with the eye is grayish brown or dark brown, in the center of the straight line of the lateral line and up and down the front end Each has a bright black spot approximately equal to the pupil, and there are dark rings or spots scattered everywhere else. The dorsal fin, anal fin and caudal fin all have dark spots, and the pectoral fins have yellowish-brown spots or horizontal stripes; the side wit...

AI Technical Summary

Problems solved by technology

In addition, due to the presence of sea cucumber reefs and sea cucumbers in ponds where sea cucumbers and flounder are mixed, sea cucumbers are easy to be taken out during sampling. If the cover is rotated or scooped to the sea cucumber reefs, the net will be broken, so rotating nets and manual sampling cannot be used. Copy network sampling

Therefore, scientific research personnel and practitioners of pond cultured flounder urgently need a low-cost, simple structure, easy to manufacture, convenient operation, and make the sample deviation less, the quantity is sufficient, does not damage the fish body, and can truly reflect the situation of pond cultured flounder populations. Sampling device and method to solve the problems that the traditional rotary net and manual net sampling are time-consuming and labor-intensive, cannot be used in ponds where sea cucumbers and flounder are mixed, the deviation between the sample and the actual population is large, and the fish body is vulnerable to damage, etc.

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