Shrimp, crab and mandarin fish polyculture method

Abstract

The invention discloses a shrimp, crab and mandarin fish polyculture method, which includes pond construction, clearing and disinfection and shrimp seed stocking; pond construction means that an old pond is altered or a new pond is dug, so that the culture pond can come up to various indexes of standardized fish pond construction; clearing and disinfection mean that after old pond silt clearing, pond embankment leakage prevention and reinforcement, new / old fish pond escape-proof facility arrangement, pond insolation and other works, the whole pond is thoroughly disinfected; the quantity of stocked shrimp seeds is 10 kilograms of freshwater shrimps per mu, and the specification is 1000 to 1400 post-winter shrimp seeds per kilogram; the quantity of stocked silver carp seeds and bighead carp seeds is 30 to 50 per mu; the area of planted waterweeds is about 50 percent of the area of the pond; the quantity of migrated snails is 230 to 260 kilograms per mu; preferably, the quantity of stocked juvenile river crabs is 500 to 800 per mu; preferably, the quantity of stocked loaches is 350 to 450 per mu; and preferably, the quantity of stocked yellow catfishes is 250 to 350 per mu. The method covers the shrimp, crab and mandarin fish polyculture technique and the high-efficiency polyculture technique for a variety of fishes, and forms a unique feasible technical operation route, the polyculture mode is novel, the economic benefit is high, and the ecological environment is good.

Description

technical field [0001] The invention relates to the technical field of special aquaculture, in particular to a method for polyculture of shrimp, crab and mandarin fish. Background technique [0002] In recent years, with the rapid advancement of industry and urbanization and the aging of traditional aquaculture pond infrastructure and other factors, the area of ​​freshwater aquaculture in Jiangnan water towns in my country, especially in the Hangjiahu Plain, has shown a trend of decreasing but not increasing. How to maximize the industrial rate per unit area and the economic benefits of fishery in the limited aquaculture water surface is an important subject worthy of attention and research. [0003] In the 1960s and 1970s, fishermen in the aquatic villages in northern Zhejiang began to release seedlings outside to engage in river crab farming. In the early 1990s, due to the difficulty in controlling the daily management of the outside aquaculture, the fishing equipment was ...

AI Technical Summary

Problems solved by technology

Because many aquatic farmers have been sticking to the traditional farming experience that has been inherited for many years, the technology is not in place, and the following problems generally exist: First, due to the unreasonable ratio of fish species and quantities, different fish species compete for food and kill each other. Increased natural elimination and mortality rate, large discounts for commercial fish on the market; second, due to the ineffective control of the production cycle, the specifications of commercial fish on the market are uneven

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