Abalone fry bottom sowing release method

Abstract

The invention belongs to the field of abalone fry release, bottom sowing culture and population proliferation, and particularly relates to an abalone fry bottom sowing release method. The abalone frybottom sowing release method comprises the steps that abalone fries attached to shells are put into rock reef gaps in a release sea area; the bottom material of the release sea area is a rock reef seaarea, the rock reef gap area accounts for more than 10% of the total surface area of the rock reef, and the water depth of the release sea area is 2-15m; the shells are selected from scallop shells,oyster shells or mussel shells and other single shells in an abalone bottom sowing local sea area, the length is 5-10 cm, and the thickness from the shell opening face to the highest position of the shell top is smaller than the rock reef gap distance; and the specification of the abalone fries is 0.8-3.0 cm, and the abalone fry bottom sowing release method is particularly suitable for small-specification 0.8-2.0 cm abalone fries. Aiming at the industrial problem of high death rate in the initial stage of bottom sowing due to many enemies of the abalone fries in the yellow Bohai sea area in China, the mode of attaching the abalone fries to the scallop shells to perform bottom sowing release can reduce physiological stress caused by stripping, scattering and transporting the abalone fries to the bottom sowing release sea area in a conventional abalone fry method, the proportion that harmful organisms can be avoided and enter the rock reef gaps during abalone bottom sowing release is effectively increased, the defect that the conventional method is large in difference of bottom sowing effects on abalone seedlings of different specifications is overcome, particularly, the defect thatsmall-specification seedlings (0.8-2.0 cm) cannot be effectively moved to the rock reef gaps is overcome, and the survival rate of the abalone seedlings of various specifications in the initial stageof bottom sowing release can be effectively increased.

Description

technical field [0001] The invention belongs to the fields of releasing abalone seedlings, bottom-sowing cultivation, and population multiplication, and specifically relates to a method for bottom-sowing abalone seedlings. Background technique [0002] Abalone, also known as abalone, is one of the important economic shellfish in my country. The aquaculture industry has grown rapidly in recent years. According to my country’s Fishery Statistical Yearbook, the abalone aquaculture output in my country has increased at an annual rate of almost 10% since 2003. In 2018, The output reached 163,000 tons. Among them, Haliotis discus hannai (Ino, 1952) accounts for the largest proportion. Abalone wrinkle is one of the original shellfish in my country. In recent years, it has been used in seedling breeding and artificial breeding. The biology and technology of Abalone wrinkle have been developed. The bottom-sowing and multiplication of wrinkled plate abalone in sea areas such as Qingda...

AI Technical Summary

Problems solved by technology

However, abalone fry below 2cm, especially small size (0.8-2.0cm) abalone fry, has a limited moving distance. According to observations, its moving distance is only 10-50cm on average. The size of the abalone seedlings is relatively large, so the cost of seed cultivation will be very high, and these reports also pointed out that when the size of the seedlings sown at the bottom is less than 2cm, the effect is poor, and the return rate is low.

Not only that, the material of the corrugated board used in the traditional method of releasing abalone seedlings is plastic, the general size is 70cm×50cm, and it will be recovered after the release is completed to prevent environmental pollution caused by plastic discarding or marine organisms eating by mistake. If the corrugated board is reduced Specifications will result in the situation of being lost with the current due to light weight

[0004] Although in the existing reports (Gao Xusheng et al., 1996) adopt the traditional plastic corrugated board bottom to play the flow 1.0-3.7cm to contain small size (0.8-2.0cm) abalone seedlings, but these reports lack the use of traditional corrugated board bottom to sow these The effect evaluation of small-scale seedlings, and in this article, the former literature is cited to point out that the bottom-sowing size is less than 2cm. 2.0cm) the bottom sowing effect of abalone seedlings is poor, so there is an urgent need for the research and development of small-sized abalone seedlings, especially for abalone seedlings with a shell length below 2cm.

[0005] In addition to the traditional method of transporting abalone seedlings with plastic attachment bases and bottom sowing seedlings, there are also technical methods such as diving seedlings in net bags for transportation, artificial reefs and other technologies to improve the habitat environment of abalone seedlings bottom sowing. These technologies are often ineffective Ideally, if the bottom sowing method of divers is used at the shelter position in the sea area, it will often not be able to accurately bottom-seek to the ideal position or the position of the shelter due to the current. Not only that, when using this method to spread seedlings to the crevices of rocks and reefs, generally it takes Peel off the abalone seedlings and pack them into bags, and then sow the seedlings at the bottom of the relevant sea area when the abalone seedlings are scattered in the mesh bag. Due to the poor physiological state, it is impossible to escape the predation of predators; artificial reefs often use cement blocks or specially designed reef structures, but due to problems such as cement materials, often the reefs cannot attach to the large abalone that feeds on them for a long time. Algae, so that the reef project with a lot of investment can not get a good effect of abalone bottom sowing and breeding