A kind of ecological prevention and control method of miscellaneous snails in shrimp ponds in estuary area

Abstract

The invention provides an ecological prevention and control method of river mouth zone shrimp pond mixed spiral shells. Through the steps of black carp fry screening, timely throwing, living creature density controlling, daily observing and adjusting and the like, ecological prevention and control on the river mouth zone shrimp pond mixed spiral shells in China are achieved, under the environment condition of a river mouth zone, the mixed spiral shells in a river mouth zone shrimp pond are prevented and controlled, the number of the shrimp pond mixed spiral shells is obviously lowered and controlled, the bad influence on pond water quality caused by the phenomenon that the mixed spiral shells grab shrimp fodder and are subjected to excessive multiplication in the medium-later period of breeding is avoided, the pond shrimp breeding survival rate can be obviously improved, and great significance is achieved in stable development of the river mouth zone prawn industry in China.

Description

【Technical field】 [0001] The invention relates to an ecological prevention and control method for snails, in particular to an ecological prevention and control method for snails in a shrimp pond in an estuary area. 【Background technique】 [0002] The estuary area is a traditional fishery-intensive area, and shrimp pond culture is one of the most important aquaculture models in the estuary area of ​​my country. Different from aquaculture in the sea area, the salinity of the water body in the estuary area is between 1 / 1000 and 15 / 1000, which results in the middle and late stages of shrimp culture ponds, which are often accompanied by a large number of miscellaneous snail breeding, which in turn leads to the occurrence of shrimp culture ponds. Miscellaneous snails eat shrimp feed; on the one hand, it affects farmers to accurately judge the appropriate feeding amount, and on the other hand, it causes waste of shrimp feed, improves the bait coefficient and reduces the breeding ef...

AI Technical Summary

Problems solved by technology

Different from sea farming, the salinity of the water body in the estuary area is between 1 / 1000 and 15 / 1000, which results in the mid-to-late stage of shrimp farming ponds, often accompanied by a large number of snails breeding, which in turn leads to the occurrence of prawn farming ponds. Miscellaneous snails eat shrimp feed; on the one hand, it affects the farmers to accurately judge the appropriate feeding amount, on the other hand, it causes waste of shrimp feed, increases the bait coefficient, and reduces the breeding efficiency

The mass reproduction of snails in the shrimp culture pond will also affect the pond water quality, reduce the dissolved oxygen in the bottom water of the pond, affect the molting growth of the shrimp and reduce the survival rate of the pond

At present, the area of ​​prawn breeding ponds in the estuary area of ​​our country is vast, and the phenomenon of breeding harmful organisms and snails in the prawn breeding ponds is very common. However, the use of drugs to kill snails in the prawn breeding ponds is costly and risky, and there are a lot of snails. Deposition at the bottom of the pond after death will also pollute the water quality of the pond, coupled with the toxic effect of the drug on the prawns, often lead to large-scale disease and death of the prawns in the pond