A kind of microalgae composite living bait for fish breeding and its production method

Abstract

The invention discloses a microalgae composite living bait for fish seedlings and a production method thereof. The microalgae composite living bait is composed of microalgae liquid mixed according to the number of cells after the following microalgae species are cultivated: Chaetoceros mourii 10%~15%, Phaeodactylum tricornutum 15%~20%, Isochrysis globosa 10%~15%, Haematococcus pluvialis 10%~15%, Chlorella pyrenoidosa 30% ~35% and Pavlova 15%~20%, and the total density is 1.2×105~5.8×105 cells / mL. The production method is as follows: (1) use the photobioreactor to culture the microalgae and algae species separately, and obtain the microalgae liquid with a culture density of 1.1×109~5.6×1010 cells / mL; (2) the microalgae liquid The microalgae composite living bait is formulated according to the ratio of the number of cells, and the microalgae composite living bait with a total density of 1.2×105-5.8×105 cells / mL is obtained. In the present application, a variety of microalgae cells are made into compound living bait, which has balanced nutrition, can improve the survival rate of fish seedlings, and reduce the incidence of the disease.

Description

technical field [0001] The invention belongs to the technical field of microalgae biology, and in particular relates to a microalgae composite living bait for fish breeding and a production method thereof. Background technique [0002] Microalgae are rich in nutrients and comprehensive, and are the primary food for aquaculture animal seedlings. The protein quality of microalgae is higher, especially the content of essential amino acids is equivalent to or even better than that of fish meal, such as aspartic acid and glutamic acid can be as high as 7.1-12.9%, cysteine, methionine, tryptophan and histidine The content of amino acids is between 0.4-3.2%, and the content of other amino acids is between 3.2-13.5%. Polyunsaturated fatty acids (PUFA) are essential nutrients for the development of aquatic animal larvae, and microalgae are the primary producers of PUFA. Many microalgae, especially diatoms and golden algae, are rich in eicosapentaenoic acid (EPA), docosahexaenoic ac...

AI Technical Summary

Problems solved by technology

According to this method, based on the amount of seedlings of these three aquaculture animals in my country in 2010, 16,000 tons of dry weight of microalgae is required. However, the current production of commercialized microalgae in my country is still less than 10,000 tons. output is negligible

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