Releasing method for sepiella maindroni fries

Abstract

The invention relates to a releasing method for sepiella maindroni fries. The method includes the following steps that a, preparation work includes the steps that when a living water transport ship hold or a transport cask is used for loading and transporting the sepiella maindroni fries to a releasing sea area, a water inlet valve of the living water hold or transport cask is closed, water is drained to the depth of 20 cm-40 cm, a water drainage port valve is closed, and oxygenation is stopped; b, fry collecting includes the steps that a living water hold opening is covered with black-out cloth, and a light source with the illumination degree of 1000 lx-2000 lx is aligned with corners of the living water hold for illumination; c, siphon releasing includes the steps that a plastic pipe is used for siphoning the fries into sea water from the corners of the living water hold, wherein the plastic pipe is smooth in inner wall, and the diameter of the plastic pipe is larger than or equal to 6 cm; in the process of siphoning, the water inlet valve of the living water hold is opened, water inlet amount is adjusted to make the water depth of the living water hold be kept from 20 cm to 40 cm until the fries are released into the sea. The phenomenon that due to stress reaction, the sepiella maindroni fries perform ink squirt is reduced, and the survival rate of the released fries is increased. Meanwhile, the labor intensity for releasing is lowered, and the time for releasing is shortened, and efficiency is improved.

Description

technical field [0001] The invention relates to a method for multiplying and releasing marine fishery resources, in particular to a method for releasing squid seedlings. Background technique [0002] Mansoni squid was once one of the famous "four major fisheries" in my country. In the 1950s and 1970s, the total annual catch reached about 70,000 tons. In the 1990s, the resources of Squid mansonii declined severely, and were even nearly exhausted. With breakthroughs in the research on domestication and seed breeding of Squid mansoni, in order to curb the declining trend of Squid mansoni resources, the East China Sea District began to multiply and release it in 2005, especially in the "Ministry of Agriculture" Opinions on implementing the "Action Outline for the Conservation of Aquatic Biological Resources in China" and doing a good job in the current key fishery work" (Nong Yufa [2006] No. 17) and the "Notice of the General Office of the Ministry of Agriculture on doing a good...

AI Technical Summary

Problems solved by technology

Another method is to use oxygenated plastic bags for packaging and transportation. When releasing the water, untie the packaging bag with water, and dump the seedlings directly into the sea. These two methods require multiple people to operate at the same time, which takes a long time. There is a certain height difference between the ship's side and the sea surface, and the seedlings are dumped into the sea with water, which is easy to be injured. It is also easy to cause the stress response of the squid mansoni, causing ink jetting, resulting in a decrease in the vitality of the released seedlings or even death, which seriously affects the effect of release. A huge waste of human and financial resources