Prawn pond ecological polyculture method

Abstract

The invention provides a prawn pond ecological polyculture method. Before water is introduced into the pond, a purse net is arranged at the central region of the pond; after water is introduced into the pond, prawns are bred outside the purse net, then omnivorous fishes are bred inside the purse net, meanwhile, a small amount of carnivorous fishes are bred outside the purse net in a cooperation machine, and finally, shellfishes are bred outside the purse net in a handing manner. A water drainage hole is formed in the bottom of the center of the pond, and in the cultivation process, the pond isaerated by adopting an aerator, and water in the pond rotates around the water drainage hole. According to the method, through the arrangement of the purse net, multispecies of fishes are cultured inpartition in the pond in a mixing manner, the omnivorous fishes in the purse net is beneficial to improve the water quality of the aquaculture pond and can not swim to a prawn culturing area outsidethe purse net to eat prawn feed;a proper amount of the carnivorous fishes are cultured outside the purse net in a mixing manner to eat sick and weak prawns and dead prawns, so that the propagation ofprawn diseases can be prevented and controlled; the shellfishes are cultured in the prawn culturing area in a mixing manner, so that the filter-feeding effect on organic debris and plankton can be enhanced, and further the water can be cleaned; due to polyculture of multispecies of fishes at the different partitions in the same pond, the ecological niche of the water body in the pond can be reasonably utilized, and the overall ecological benefits of culture can be improved.

Description

technical field [0001] The invention belongs to the field of aquaculture, and relates to an aquatic mixed culture method, in particular to an ecological mixed culture method for prawns in ponds. Background technique [0002] The pond culture of prawns is an important pillar of my country's aquaculture industry. Since the culture of a single species of prawns in ponds is prone to failure due to disease outbreaks, production has turned more to the development of fish and shrimp polyculture, but the technical model is still not perfect. The main reason for its existence is The problems are: (1) It is difficult to choose mixed species. According to the feeding habits of fish, the fish that are mixed with each other can be divided into omnivorous fish, carnivorous fish and filter-feeding fish. The purpose of choosing omnivorous fish is to ingest excess prawn feed, improve feed utilization and reduce water pollution; choose carnivorous fish to eat diseased and dead shrimp to preve...

AI Technical Summary

Problems solved by technology

[0002] The pond culture of prawns is an important pillar of my country's aquaculture industry. Since the culture of a single species of prawns in ponds is prone to failure due to disease outbreaks, production has turned more to the development of fish and shrimp polyculture, but the technical model is still not perfect. The main reason for its existence is The problems are: (1) It is difficult to choose mixed species

But there are disadvantages: polyculture of omnivorous fish, fish will compete for prawn feed, affect the normal feeding and growth of prawns, and the effect of preventing and controlling infectious diseases of prawns is not good; polyculture of carnivorous fish, the number of fish Or if the specifications are not appropriate, healthy prawns will be preyed on in large quantities by fish, and the removal effect on prawn residual bait is not good, which is not helpful for water quality regulation; polyculture of filter-feeding fish cannot solve the problems of prawn residual bait and the prevention and control of infectious diseases. And only suitable for freshwater or very low salinity seawater pond culture

(2) It is difficult to determine the stocking density and proportion

(3) It is difficult to determine the feed feeding plan

Prawns have high nutritional requirements. In conventional fish and shrimp polyculture ponds, feeding all fish feed will affect the growth of prawns; and when feeding shrimp feed, if the feeding method is improper, the shrimp feed will be ingested by fish in large quantities, which will affect the growth of prawns. Cause waste and seriously affect the breeding efficiency