Ecological effect and mixed culture method of sipunculus nudus

Abstract

The invention discloses an ecological benefit and mixed culture method of sipunculus nudus. According to the ecological benefit of the sipunculus nudus disclosed by the invention, the effect of the sipunculus nudus on improving the breeding ecological environment is researched, the situations that the sipunculus nudus has a migration effect on organic matters of sediments and also has biological disturbance behaviors are found, and the physical and chemical characteristics of the sediments and sediment-water interfaces can be improved. The sipunculus nudus is in mixed culture in a pond with a sandy bottom or a silt bottom, so that the substance utilization rate of a breeding system can be increased, and besides, the breeding water body environment is improved. According to the mixed culture method disclosed by the invention, the sipunculus nudus and penaeus monodon can be in the mixed culture on the basis of a good scientific basis and good practical data, for example, the sipunculus nudus and the penaeus monodon have similar requirements for temperature, salinity and the like; besides, meshes are covered, so that the probabilitythat the penaeus monodon preys on the sipunculus nudus can be obviously reduced; the breeding functions of the sipunculus nudus and the penaeus monodon have a complementary relationship. The situation that the sipunculus nudus is unceasingly bred for 60-80 days after the penaeus monodon is harvested so as to solve problem that the breeding cycle of the sipunculus nudus and the breeding cycle of the penaeus monodon are not incompletely synchronous is also found.

Description

technical field [0001] The invention relates to the application of the square starworm in improving the ecological environment and its polyculture method. Background technique [0002] Naked Checkered Starworm ( Sipunculus nudus ) belongs to the phylum Astrozoa, and is a large benthic animal that lives in burrows. It is widely distributed along the coast of China's coastal waters, and mostly inhabits sandy tidal flats. The suitable temperature range for its growth is 15~35℃, and the suitable salinity range is 20~30. The square star worm has important edible and medicinal value, and has a high market value at home and abroad. [0003] Monodon prawns ( Penaeus monodon ) is a traditional species of prawn farming in Asia. In China, its aquaculture areas are mainly distributed in coastal areas such as Fujian, Guangdong, Guangxi, Hainan and Taiwan. Among them, Guangdong is the province with the largest scale of P. 55%. The culture mode of Penaeus monodon is relatively simple...

AI Technical Summary

Problems solved by technology

[0004] Current related research, such as the polyculture of P. monodon and Scylla serrata; the polyculture of P. monodon and basket fish or mullet; the polyculture of P. monodon and Philippine clams; Polyculture, etc.; polyculture experiments of star worms and clams in coastal tidal flat areas (published by Cai Dejian); the main purpose of the polyculture model involved in these studies is to improve the utilization rate of nutrients in the culture system, however, in the above polyculture model There are some problems: polyculture fish or crabs will compete with P. monodon for food, and at the same time, crabs will prey on the prawns in the molting; macroalgae mainly use inorganic salts in the culture system, and macroalgae will also be due to Detritus increases the content of organic matter in the substrate; the activity of Philippine clam is mainly in the surface layer of the sediment, and the vertical migration ability of the surface sediment is not obvious

These research reports only mentioned that the polyculture of D. gridia and prawns can bring better economic benefits. The method of polyculture is only a rough description, and it does not involve the role of D. gridia in the breeding environment; nor does it involve the The impact of the culture of Glycina on the growth of other cultured species; and the existing articles focus on Litopenaeus vannamei, and no research reports involving Penaeus monodon have been found