Efficient cultivation system and method for mudflat economic shellfish juvenile mollusks

Abstract

The invention discloses an efficient cultivation system and method for mudflat economic shellfish juvenile mollusks. A 5-8 mu algae species pond and a 20+ / -2 mu algae enlarged culture pond is constructed, seawater and algae species therein are introduced, and algal facies of the seawater in the algae species pond is observed, thereby facilitating disinfection treatment and fertilization of the seawater in the pond. After microscopically detecting the algal facies, proper algal facies are selected, directional enlarged culture on high-quality algae is conducted, water is fertilized to quickly breed the algae to a certain scale, 1 / 3 of seawater reaching the specified enlarged culture concentration in the algae species pond is introduced into the enlarged culture pond for enlarged culture, water is added again to reach the enlarged culture density, pond moving operation is repeated for continuous culture, and finally, water in the enlarged culture pond is led into a seedling raising chamber for juvenile mollusk running water circulation feeding culture, so as to promote growth and development of shellfish. According to the method disclosed by the invention, about 10 billion seedlings with the specification of 1,600,000 / kg can be cultured in the seedling raising chamber with the culture scale of 4-5,000 square meters, so that the culture cost is saved.

Description

technical field [0001] The invention relates to the field of shellfish cultivation, in particular to a system and method for efficiently cultivating spat of tidal flat economic shellfish. Background technique [0002] At present, the artificial breeding technology of shellfish has been studied, but the supply of single-celled algae is extremely unstable, the pollution of algae cultivation pools by protozoa is frequent, and the bait is seriously insufficient after the larvae attach to metamorphosis. Low, very unstable seedling emergence and other defects. Microalgae are a kind of autotrophic plants widely distributed in land and ocean, rich in nutrients and high in photosynthetic utilization, and are high-quality bait for shellfish nursery. But in the process of using it as bait, it is difficult to have fresh microalgae all the time. For the cultivation of traditional bait, single-celled algae such as diatoms, golden algae, and flat algae are generally used as algae species...

AI Technical Summary

Problems solved by technology

The cultivation method of the prior art has the following defects: 1. There are relatively few types of microalgae, and large-scale cultivation requires certain temperature, salinity and light conditions to limit

2. Sometimes the quality of the algae species is not good. Most of the microalgae in the seawater are in the dead stage, and the algae species are prone to aging. The content of dead algae in the algae species is high and not fresh. The spat rearing cycle is shortened, resulting in slow growth of spat

3. The traditional bait culture method requires the use of various indoor facilities such as triangular flasks, transparent plastic bottles, and large cement pools, which occupy a large area of ​​the nursery room, resulting in high costs for cultivating shellfish seedlings

4. The cultured algae species are single, and shellfish are prone to malnutrition

Therefore, traditional shellfish breeding methods cannot produce large quantities of high-quality seedlings to meet the needs of multiplication and release and artificial breeding

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