Microalgae composite living bait for shellfish breeding and production method of microalgae composite living bait

Abstract

The invention discloses microalgae composite living bait for shellfish breeding and a production method of microalgae composite living bait. The microalgae composite living bait is prepared by cultivating the following microalgae species to obtain a mixed microalgae solution according to the proportion of cell numbers: 15-20% of chaetoceros muelleri, 20-25% of coccolithophores, 5-10% of isochrysis galbana, 15-20% of haematococcus pluvialis, 25-30% of chlorella pyrenoidosa and 10-15% of platymanas subcordiformis, wherein the total density is (1*105) to (5*105) cells / mL. The production method comprises the following steps: (1) utilizing photobioreactors to cultivate the microalgae species respectively, thereby obtaining the microalgae solution of which the cultivation density is (1*109) to (5*1010) cells / mL; (2) preparing the microalgae solution into the microalgae composite living bait according to the proportion of cell numbers, wherein the total density of the microalgae composite living bait is (1*105) to (5*105) cells / mL. The microalgae composite living bait is prepared from various microalgae cells, so that a nutrition balance effect is realized, the survival rate of juveniles shellfish can be effectively improved, and the morbidity of the juveniles shellfish can be reduced.

Description

technical field [0001] The invention belongs to the field of microalgae biotechnology, and in particular relates to a microalgae composite live bait for raising shellfish seedlings and a production method thereof. Background technique [0002] The aquaculture of economic shellfish such as oysters, mussels, clams and scallops accounts for an increasing share of world fisheries production and has become one of the pillars of the marine living resource industry. As the best bait for shellfish seedlings, microalgae is the only suitable food source for shellfish seedlings. [0003] In recent years, with the rapid development of the industrialization process of the aquaculture industry in various countries, the production technology of microalgae bait has developed rapidly, and the application and development of microalgae in aquaculture feed have developed rapidly. The proportion of microalgae bait in aquaculture feed Also getting bigger and bigger. In the production process of...

AI Technical Summary

Problems solved by technology

However, due to the unique growth characteristics of microalgae, the industrialization degree of its large-scale production is still very low. So far, only the design and application of the open culture system have been relatively successful, which has been enlarged to 180,000 m in Taiwan, China. 2 (production of chlorella) and 200,000 m2 of Mexico City for the production of spirulina 2 , up to 50 hectares for Western Australia Biotech

However, open systems generally have disadvantages such as difficult to control growth parameters, unstable culture environment, easy to be polluted, difficult to achieve aseptic culture, and low yield. The cultivation of microalgae that tolerates growth in extreme environments; the large-scale cultivation of economical algae such as Diagonal hairs and golden algae is difficult to apply, which greatly restricts the development and marketization of microalgae bait products

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