High-efficient ecological seedling-raising method of blue crabs

Abstract

The invention provides a high-efficient ecological seedling-raising method of blue crabs. The high-efficient ecological seedling-raising method comprises the following steps of: selecting parent crabs after artificial breeding, adopting circulating water to keep the water temperature in an overwintering pond, feeding clam worms, ruditapes philippinarum, squid and other baits for performing intensive culture on the parent crabs, utilizing a single-crab and single-pond mode to perform pond arrangement, and laying disinfection sea mud at the bottom of a larval rearing tank for simulating a sea natural ecological environment. By using the method disclosed by the invention, vertical transmission of diseases can be avoided, the use of coal is reduced, and energy conservation and emission reduction are realized; and the baits can be reasonably matched for promoting the healthy development of embryos, and self-mutilation of larvae can be reduced for improving the yield and the quality of seedlings. According to the method disclosed by the invention, the yield of the seedlings of the blue crabs can be improved by 30-50%, the outdoor farming survival rate can be improved by 10-15%, and the method can be widely applied to offshore sea waters and has significant economic benefits.

Description

technical field [0001] The invention belongs to the technical field of artificial seedling cultivation of swimming crabs, and in particular relates to an efficient ecological seedling raising method of swimming crabs trituberculatus. Background technique [0002] Portunus trituberculatus ( Portunus trituberculatus ) is an important marine economic animal. Because of its fast growth, large individual and delicious meat, it is deeply loved by the masses and has high economic value. Therefore, it is gradually developed as a breeding object. At present, the breeding area is 500,000 mu, and the output reaches 100,000 tons. It has become one of the leading species of marine farming in my country. At present, about 1.5 billion Portunus trituberculatus seedlings are needed for breeding every year. However, in recent years, the yield and quality of the seedlings have declined. In Weifang, Shandong, the average yield of Portunus trituberculatus seedlings was 10,000 / cubic water body a...

AI Technical Summary

Problems solved by technology

[0003] Aiming at the problem of the degradation of Portunus trituberculatus germplasm resources in the prior art, the purpose of the present invention is to provide a method for efficiently raising ecological seedlings of Portunus trituberculatus. The present invention selects artificial breeding parent crabs, and adopts a single pool of single crabs and cultivates Measures such as laying sea mud on the bottom of the pond can increase the seed production by 30-50%, and the breeding survival rate can also increase by 10-15%, which solves the problem of low yield and poor quality of wild parent crab factory seedling cultivation in the prior art. question