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Method for improving daphnia growth and propagation capacity and enhancing bait nutrition performance

A nutritional and water flea technology, applied in animal feed, animal feed, application, etc., can solve the impact of aquatic animal survival rate, growth rate and disease resistance, restrict the production of water flea and product quality, and it is difficult to effectively and fully Provide and other issues to achieve the effect of reducing drying links and energy consumption, avoiding environmental pollution pressure, and reducing production costs

Inactive Publication Date: 2016-11-23
INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, in artificial aquaculture, neither the naturally captured daphnia nor the artificially bred daphnia can meet the huge demand for aquatic products. At the same time, the supply and types of single-celled microalgae are limited Limitations, only common microalgae (such as chlorella) can be provided, and have to be replaced by other types of bait (such as yeast) or even artificial feed, it is difficult to effectively provide astaxanthin, carotenoids, EPA and DHA Natural active substances such as polyunsaturated fatty acids, in other words, insufficient feeding of microalgae bait further restricts daphnia production and product quality
Therefore, the daphnia bait produced is difficult to meet the needs of aquatic animals fish, shrimp and other aquatic animals for the above-mentioned active substances, resulting in the serious impact on the survival rate, growth rate and disease resistance of aquatic animals, thus restricting the aquaculture industry. further development of

Method used

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  • Method for improving daphnia growth and propagation capacity and enhancing bait nutrition performance
  • Method for improving daphnia growth and propagation capacity and enhancing bait nutrition performance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Take two 50-liter incubators, add 40 liters of 25‰ seawater to them, and inoculate them with isopycnic daphnia (1 / ml), and cultivate them in a natural light greenhouse with sufficient ventilation for 12 days. During this period, add 15.0g fresh Nannochloropsis mud every day in one of them; Fully wall-breaking treatment) mixed product, wherein the mixed dry weight ratio of chlorella and haematococcus is 3:2 (that is, haematococcus accounts for 40% of the total microalgae bait).

[0026] The result shows: the growth and reproduction of the two feeding groups are good (see figure 1 ). During the whole culture period, in the control group fed with Nannochloropsis alone, the density of Daphnia reached a maximum of 32 / ml; while the density of Daphnia in the group fed with Nannochloropsis and Haematococcus broken algal residues was more, The highest reaches 37 / ml, and the individual density of Daphnia is increased by about 15%. At the same time, the bodies of Daphnia gnats ...

Embodiment 2

[0028] Take two 50-liter incubators, add 40 liters of 25‰ seawater to it, and inoculate isopycnic daphnia (1 / ml), and cultivate them in a natural light greenhouse with sufficient ventilation for 8 days. Wherein, 15.0g fresh Nannochloropsis mud is added every day in an incubator; Similarly, a mixed product of equal weight Nannochloropsis fresh algae mud and 1.5% Haematococcus fresh algae mud is added to another incubator , wherein the mixed dry weight ratio of chlorella and haematococcus mud is 4:1 (that is, haematococcus accounts for 20% of the total microalgae bait).

[0029] The results showed that: the dana moa in the two feeding groups obtained the phenomenon similar to that in the embodiment, and the dana belly grew and reproduced well. The control group fed Nannochloropsis alone, and the group fed Nannochloropsis and Haematococcus algae mud reached 10 / ml and 11 / ml respectively, and the densities of the two treatment groups. No obvious difference was shown. However, wit...

Embodiment 3

[0031] Take two 50-liter incubators, add 40 liters of 25‰ seawater to them, and inoculate Daphnia nuda at a density of 1 / ml, and cultivate them in a natural light greenhouse with sufficient ventilation for 10 days. During this period, 15.0g fresh Nannochloropsis mud was added every day in one of the incubators; Mixed product of slag, wherein the mixed dry weight ratio of chlorella and haematococcus algal residue is 1:1 (that is, haematococcus accounts for 50% of the total microalgae bait).

[0032] The results confirmed that the growth and reproduction of Daphnia in the two feeding groups were good. And during the whole culture period, compared with the control group fed with Nannochloropsis and Haematococcus algal residues, the density of Hydraphyllia was also more, and the trend of increase of Hydraphysis, insect The body size and color are basically similar to the results of Example 1.

[0033] The above results also further indicated that whether the astaxanthin-rich Hae...

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Abstract

The invention belongs to the field of aquatic products, and relates to a method for improving daphnia growth and propagation capacity and enhancing bait nutrition performance. In the aquatic bait daphnia culture process, microalgae biological products rich in natural bioactivators are added, then, the daphnia growth and propagation capacity is improved, and nutrients of the daphnia as bait are enhanced. The microalgae rich in bioactivators is adopted as a pure natural biological product, and due to natural transfer of an algae-daphnia-aquatic livestock food chain, the natural characteristics of aquatic products are ensured, and the daphnia is safe to use and free of toxic and side effect; the microalgae product contains various bioactivators, and further has the certain polysaccharide, protein and other nutrient and energy substances, and the aquatic product application effect can be comprehensive improved.

Description

technical field [0001] The invention belongs to the field of aquatic products and relates to a method for improving the growth and reproduction ability of daphnia and strengthening the nutritional performance of bait. Background technique [0002] With the continuous development of society and the improvement of living standards, people's demand for aquatic products such as fish, shrimp and crab is increasing. In addition, the catch of the above-mentioned aquatic products is decreasing year by year. It is important to vigorously carry out artificial breeding to provide more aquatic products to meet social needs. The main trends of current and future aquaculture development. [0003] However, in the current culture of fish, shrimp and other aquatic animals, especially in the nursery stage, the larvae of the above-mentioned aquatic animals generally have a series of problems such as low hatching survival rate, slow growth, low immunity or disease occurrence or even death. One...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01K67/033A23K10/30A23K10/37A23K50/80A23K50/90
CPCA01K67/033Y02P60/87
Inventor 刘建国李虎董乃畅
Owner INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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