Externally-hung marker plate for artificial breeding of flatfish fry and marking method

Abstract

The invention discloses an externally-hung marker plate for artificial breeding of flatfish fry, which belongs to the technical field of culture and proliferation of marine biological resources. The externally-hung marker plate for the artificial breeding of the flatfish fry comprises an external marker end, a connecting line and an anchoring end, wherein the external marker end consists of a marker rod and an outer sleeve; encoding information is printed on the marker rod; the outer sleeve is tightly sleeved outside the marker rod; the marker end and the anchoring end are connected together by the connecting line; the connecting line is connected with one end of the marker end to form a straight line; and the other end of the connecting line is vertically connected with the anchoring end. The externally-hung marker plate for the artificial breeding of the flatfish fry is simple in structure, convenient to manufacture, light in weight and easy to operate; and the marker rod is coated by the transparent polypropylene outer sleeve and the outer sleeve is good in corrosion resistance, so that the information difficultly shed due to corrosion. The invention further provides a marking method used for the externally-hung marker plate for the artificial breeding of the flatfish fry. The externally-hung marker plate for the artificial breeding of the flatfish fry is anchored on the backs of the flatfish fry by using a special marking machine; the marked flatfish fry is high in survival rate; the plate-shedding rate is low; the externally-hung marker plate for the artificial breeding of the flatfish fry has small influence on the growth and the food intake amount of the marked flatfish fry; and the marking method is simple in operation and is applicable to marking of flatfish bodies on a large scale.

Description

technical field [0001] The invention belongs to the technical field of increasing and breeding marine biological resources, and in particular relates to a sign plate and a marking method for artificially draining fluids of flounder and flounder seedlings. Background technique [0002] In recent decades, the increasing frequency of human social activities and the rapid development of port-side industries have resulted in increasing pollution of the marine ecological environment, resulting in the decline of marine biological resources in my country's coastal waters, the increasingly fragile structure of marine ecosystems, and the capture of marine biological resources year by year. decline. Artificial breeding and release is the main way to restore and replenish marine biological resources and maintain ecological balance and biodiversity. Marking released organisms has become the only means to track released organisms and evaluate the effect of breeding and releasing. Carrying ...

AI Technical Summary

Problems solved by technology

In the early stage, when we used it to mark small-sized flounder seedlings (7cm-11cm in total length), it was easy to penetrate the fish body and cause a large trauma on the surface of the fish body, resulting in a large number of deaths and a high rate of de-branding

At the same time, due to the large surface area and weight of the sign board, it affects the swimming behavior of the marked fish and increases the chance of being preyed in natural sea areas after release

There are few researches on the release of flounder and flounder in vitro by marking at home and abroad, and there are problems of high mortality and delisting rate

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