Method for breeding seeds of river crabs

Abstract

The invention discloses a method for breeding seeds of river crabs. The method includes steps of a), constructing temperature-control breeding ponds; b), disinfecting the breeding ponds and planting grass in the breeding ponds; c), intensively breeding the seeds at a first level; d), intensively breeding the seeds at a second level; e), intensively breeding the seeds at a third level; f), cultivating adult crabs. The method for breeding the seeds of the river crabs has the advantages that the method is combined with biological characteristics of the river crabs, the river crabs are artificially and intensively cultivated, temperature-control facilities are constructed on the river crab seed breeding ponds, accordingly, natural growth characteristics of the seeds of the river crabs can be changed, the seed breeding periods can be shortened, the seeds of the river crabs are constantly at fast growing stages when the seeds are megalopa by the aid of the method for scientifically breeding the seeds, merchandized crabs with large sizes can be cultivated in one year instead of the traditional two years and can appear on the markets in off-peak seasons, and the purpose of increasing economic benefits can be achieved.

Description

technical field [0001] The invention belongs to the technical field of aquaculture, and relates to a method for cultivating river crabs. Specifically, the seedlings of river crabs are intensively cultivated in ponds with temperature control facilities, the seedling cultivation period is shortened, and a scientific cultivation method is combined to achieve an improvement over the tradition. Producing commercial crabs in two years is a method of producing large-scale commercial crabs in one year. Background technique [0002] The traditional river crab breeding method is to grow megalopa into large-sized crab species in the same year, and grow commercial crabs in the next year after overwintering. The breeding cycle is long and the economic benefits are low. [0003] In recent years, with the emergence of early breeding seedlings (generally referring to the megalopa larvae that came out of the pond before mid-April), it has become possible to grow commercial crabs in that year...

AI Technical Summary

Problems solved by technology

[0003] In recent years, with the emergence of early breeding seedlings (generally referring to the megalopa larvae that came out of the pond before mid-April), it has become possible to grow commercial crabs in that year. Many places in the country use greenhouses to cultivate crab species in March-April. , and then cultivate adult crabs, but because the seedlings have not been intensively cultivated, the size of the crab species is relatively small (600-1600 / kg), and the size of the adult crabs in that year is mostly less than 100 grams / piece