Artificial breeding method of southward stichopus japonicus

Abstract

The invention discloses an artificial breeding method of southward stichopus japonicus, and belongs to the technical field of cultivation of the stichopus japonicus. In autumn in the north, when the water temperature of seawater of a natural sea area reaches 10-15 DEG C, cultivated stichopus japonicus is collected to be stored at a low temperature, and the storage water temperature is the natural water temperature; when the natural water temperature drops to 4-6 DEG C, the water temperature is kept for 10-20 days, and then the cultivated stichopus japonicus is transported to the south by adopting a water transportation method to be cultivated in cages on the sea; when the natural water temperature rises to 17 DEG C, the cultivated stichopus japonicus is moved from the sea to a workshop for spawning, fertilization, incubation and cultivation of floating hatch larva, throwing of substratums and cultivation of young stichopus japonicus; when the natural water temperature in the south gradually exceeds 28 DEG C, kelp seedling cooling water is utilized to cool the water used for cultivation of the young stichopus japonicus through plate heat exchangers, and the water temperature is kept within the range suitable for growth of the young stichopus japonicus. By means of the artificial breeding method of the southward stichopus japonicus, gonad development of the southward stichopus japonicus is promoted, the sperm quality and the ovum quality are improved, and the higher hatching rate and emergence rate are obtained.

Description

technical field [0001] The invention relates to a method for artificial breeding of sea cucumbers moved south, and belongs to the technical field of sea cucumber cultivation. Background technique [0002] In recent years, sea cucumber farming has gradually moved south from the traditional provinces of Liaoning and Shandong to the coastal areas of Fujian and Zhejiang. The southern coastal areas, especially the coastal areas of Fujian, have taken advantage of the ecological conditions such as high water temperature in winter in the local sea area, suitable for the growth of sea cucumbers without overwintering, etc., to develop Different forms of sea cucumber farming have been developed, and the scale has expanded rapidly. In 2011, the sea cucumber pond culture in Zhangzhou City, Fujian Province reached 400hm 2 , Ningde City is only in Xiapu County, and the cage culture in the sea area is about 10×10 4 Boxes, the amount of seedlings invested reached 7500t, and the breeding sc...

AI Technical Summary

Problems solved by technology

[0003] The large-scale artificial breeding of japonicus in the south has not been reported yet. During the process of raising seedlings locally in the south, the following technical problems were found: 1. The number of fertilized eggs was low and the egg quality was poor, resulting in a low hatching rate of fertilized eggs ; 2. During the planktonic period, there is a lack of suitable bait, rotten stomach and rotten edges are prone to occur, and the survival rate and abnormal attachment rate of planktonic larvae are low; 3. The water temperature is high in July and August, and the young ginseng grows slowly and the mortality rate is high

The above problems limit the progress of sea cucumber seedling breeding in the south

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