High-yield large-scale breeding method carried out by scientifically utilizing autumn cannon-head macrobrachium nipponense larvae

Abstract

The invention discloses a high-yield large-scale breeding method carried out by scientifically utilizing autumn cannon-head macrobrachium nipponense larvae, belonging to the field of aquaculture science. The high-yield large-scale breeding method comprises the following steps of: breeding after macrobrachium nipponense parents in different local water areas are collected in March-April of the current year; starting to fish cannon-head macrobrachium nipponense with larger sizes in batches for sparse breeding in different ponds after female shrimps brood and incubate to generate a large quantity of the larvae in mid-June-July, wherein the cannon-head macrobrachium nipponense sparsely bred in the different ponds start to achieve sexual maturity and brood and incubate autumn larvae in mid-August-September; breeding by utilizing the incubated autumn larvae; and fishing large macrobrachium nipponense and remaining small macrobrachium nipponense during a breeding period, and lasting to about May of the coming year. The invention can effectively carry out the breeding by utilizing the autumn macrobrachium nipponense larvae, and enhances the total output of the macrobrachium nipponense by more than 20 percent, the proportion of large-size macrobrachium nipponense by more than 10 percent and the breeding benefit by more than 15 percent.

Description

technical field [0001] The invention relates to a high-yield and large-scale culture technology for scientifically utilizing autumn green shrimp seedlings, and relates to a culture method for freshwater economical shrimp. Background technique [0002] Freshwater shrimp (Macrobrachium nipponeuse), scientific name Macrobrachium nipponeuse, belongs to the phylum Arthropoda, Crustacea, Decapod order, Macrobrachidae, and the genus Macrobrachium. Freshwater shrimp farming has the advantages of good market prospects, simple technical operation, low start-up investment, low production cost, and high economic benefits. Moreover, freshwater shrimp is tender in meat, delicious in taste and rich in nutrition. At present, the annual output of freshwater shrimp farming in my country is more than 200,000 tons. However, with the continuous expansion of the scale of farming and the continuous improvement of the degree of intensification, the economic benefits of freshwater shrimp farming are...

AI Technical Summary

Problems solved by technology

However, with the continuous expansion of the scale of farming and the continuous improvement of the degree of intensification, the economic benefits of freshwater shrimp farming are getting lower and lower. Deterioration of traits, weakening of stress resistance, increase of diseases, and downward trend of breeding benefits seriously restrict the development of freshwater shrimp farming industry, and it is urgent to optimize the production process of freshwater shrimp farming

[0003] At present, there are the following three ways for the source of the parents of freshwater shrimp: one is that the farm (household) catches the big ones and keeps the small ones, and uses the remaining small shrimps as the parents of the next generation. The problem with this method is that it causes adverse selection and does not Considering the kinship of the remaining parents, the phenomenon of inbreeding caused by breeding together is very serious, which causes the germplasm degradation of the cultured freshwater shrimp to become more and more serious, especially in slow growth and precocious puberty, resulting in poor economic traits

The second is to introduce freshwater shrimp parents from other waters such as Dongting Lake, Poyang Lake, Taihu Lake, Chaohu Lake, Hongze Lake, etc., to replace local domesticated species that have been cultured for a long time. The problem is that the parents are not easy to transport, the loss is high, and the cost is high. Promotion is difficult

At present, the measures to effectively control the excessive autumn multiplication of freshwater shrimp mainly include purchasing high-quality seedlings, controlling the temperature of pond water, controlling the number of water changes, delaying the time of releasing seedlings, splashing lime water, controlling the water quality of ponds, and raising silver carp and bighead carp species. Not easy to grasp, little effect