Soilless Nereid breeding method

Abstract

The invention relates to a soilless Nereid breeding method. A cement pond is used as a Nereid breeding pond. Sea water undergoes dark precipitation and secondary sand filtration and is then filtered for further use by a 300-mesh bolting-silk bag. Gracilaria is selected as a Nereid perching environment. The breeding pond and the gracilaria are sterilized. The gracilaria is paved at the bottom of the pond. The filtered sea water is added. Yong Nereids with 2-3-meter bodies are put in the pond according to a density of 1500-2000 Nereids per square meter. During the Nereid breeding, chlamydomonas, artificially mixed feed and fish paste are used for feeding the Nereids. Water in the pond is changed each day. The breeding pond is cleaned regularly. The light illumination is controlled in a range of 400-1000 Lux. Meanwhile, as the Nereid grow, the number of the Nereids is added. After 8-10 months of breeding, the Nereid yield rate can reach 5-7 kg / m2, which is 40 percent higher than the traditional breeding methods. The method adopts the gracilaria in place of silt as the Nereid perching place, thereby facilitating the cleaning, reducing a great amount of man power, fully improving the breeding environment, decreasing the possibility of diseases and being good for the growth of the Nereids and the breeding density increase. Meanwhile, the gracilaria can also be sold as commodity.

Description

technical field [0001] The invention belongs to the technical fields of agriculture, forestry, animal husbandry and fishery, in particular to a soilless culturing method of nereus. Background technique [0002] Perinereis aibuhitensis Gnlbe belongs to the phylum Annelid, Polychaeta, Nereidida, Neteididae, Neteidinae, rich in protein, eicosapentaenoic acid , the economic value is very high. First of all, the meat is fat, and it is an excellent bait. It is known as "universal fishing bait", and it is also a good variety for exporting foreign exchange, about 10,000 US dollars per ton; secondly, it is a high-quality fresh bait for fish, shrimp and crabs. Or as an additive and feed attractant for aquatic bait, it can save bait in shrimp ponds, clarify water quality, and reduce shrimp diseases; third, it inhabits estuaries, and its larvae and adults can be used as good biological indicators for detecting water pollution . There are abundant tidal flat resources along the coast ...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the shortcomings of the prior art that the metabolites in clamworm culture are all buried in the sand, making cleaning difficult, causing the breeding environment to be easily polluted and causing diseases, and to provide a method using large seaweed—— A soilless culture method for clamworms in which Gracilaria replaces sediment as the living environment of clamworms