Manufacturing of eel satellite sign fixing device and sign connection method

Abstract

The invention relates to a method for making a satellite mark fixing device for eels and a mark connection method, which includes two stages, wherein the first stage is to make a satellite mark fixing device at a position 6 cm backward from the front end of the dorsal fin base of the fish body, and the second stage For connection satellite sign. In the first stage, the fishing line was penetrated from the back muscles above the eel's side measuring line, and the fishing line was folded back at the protruding ends of the fish's two sides. In the second stage, use the 4-strand fishing line to make the connection between the logo and the fish body more firm, play a better role in supporting and fixing the logo, and prevent the loosening of the 4-strand fishing line through the heat shrinkable tube, effectively avoiding the 4-strand fish Lines scattered in the body of water are implicated with other debris.

Description

technical field [0001] The invention relates to the technical field of fish marks, in particular to a method for manufacturing an eel satellite mark fixing device and a mark connection method. Background technique [0002] In recent years, due to overfishing and habitat deterioration, eel resources have shown a sharp decline trend, which has seriously affected eel resources. In 2014, the eel was assessed as an endangered species by the International Union for Conservation of Nature and included in the Red List. At present, in order to change this situation, a national action plan for the protection of eels has been launched, in which the release tracking of eel parent markers is one of the important tasks. The sensors built in the markers can be used to measure and store the three-dimensional spatial data on the eel migration route, and Environmental factor data such as water temperature, salinity, and water depth, and then receive basic data through satellites to reveal th...

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Problems solved by technology

[0003] In the previous eel satellite mark fixing devices, the mark fixing point is generally selected at the front end of the dorsal fin of the fish body. The method of penetrating the eel body is from the back downwards. This penetrating method is not easy to control the depth and direction, and it is easy to injure the internal organs of the eel, thereby causing fatal damage; It penetrates from the back of the fish body and exits from both sides of the fish body. The middle is a closed structure. The satellite mark is directly fixed on the closed part of the fixation line. After the mark is fixed, the eel is directly used for releasing, without temporary breeding in the middle. Process that is detrimental to post-mark eel wound healing and recovery

After the release of the marked fish, it is impossible to judge the firmness of the fixing device and the recovery of the eel's wound, and it is impossible to carry out follow-up inspection and recovery treatment of the wound on the eel, and it is impossible to determine the normal survival of the eel after release; the fixation of the previous fixing device After the line passes through the side of the fish body, it passes through the silica gel sheet and is fixed with a single-hole buckle. The end of the fixed line is free. On the one hand, the free end has the risk of falling off easily, and on the other hand, the free end is also easy to hook into the net in the water body. Tools, ropes and other sundries hinder the normal migration of eels

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