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Astaxanthin-6 Functions Of Animal Feed
Aug 23, 2021

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Excellent coloring effect

Advantages: The absorption and utilization rate of astaxanthin by cultured organisms is better than other pigments


e.g. Rainbow Trout

The digestion and absorption of astaxanthin by rainbow trout is significantly better than that of canthaxanthin, and its maximum apparent absorption coefficient is more than twice that of canthaxanthin; when rainbow trout is fed with astaxanthin and canthaxanthin respectively, when the same coloring effect is achieved , It is necessary to feed canthaxanthin 72 × 10-6 (m/m), but only astaxanthin 60 × 10-6 (m/m) is required, indicating that astaxanthin has a higher coloring efficiency than canthaxanthin. 【1】

Improve survival rate

Putting astaxanthin as a feed additive can improve the survival rate of aquaculture objects through multiple channels such as enhancing immunity, improving tolerance to harsh conditions and adapting to changes in environmental conditions.


E.g.

Prawns:

Astaxanthin accumulates as a pigment in tissues, which can store oxygen between cells and enhance the tolerance of fish and shrimp to high-nitrogen and low-oxygen environments;

Enhance the resistance of shrimp larvae to fluctuations in salinity and reduce the damage of ultraviolet radiation to aquatic animals. 【2】


Atlantic salmon:

When the astaxanthin in the feed is less than 1*10-6 (m/m), a large number of fry die, and the survival rate is still less than 50%; while in the control group fed with sufficient astaxanthin, the fry survival rate can reach more than 90% . 【3】


Promote growth, reproduction and development

Promote growth:

Increase weight gain rate/Astaxanthin in feed is less than a certain content, fry growth slows down/Feeding astaxanthin can shorten the molting cycle of shrimp postlarvae



Improve egg quality:

Adding astaxanthin to the feed can increase the survival rate of juvenile shrimp and the buoyancy and survival rate of fish eggs. It can also increase the fertilization rate, egg survival rate and growth rate during the salmon nursery period. 【4】


Improve physiological function:

Improve the liver function of farmed rainbow trout; strengthen the liver cell structure and glycogen storage of red tilapia; improve the hematopoietic function and lipid and calcium metabolism of rainbow trout.


Boost immunity:

It can not only improve liquid indicators such as serum defensin and lysozyme activity, but also improve cell indicators such as phagocytosis and non-specific cytotoxicity.

e.g. Atlantic salmon


Improve nutritional value


After Atlantic salmon ate feed containing astaxanthin, the content of vitamin A/C/E in certain tissues increased significantly, and when the content of astaxanthin added in the feed was higher than 5.3*10-6(m/m ), the lipid content is also significantly increased; when 13.7*10-6 (m/m) astaxanthin is added, the lipid content in Atlantic salmon meat can increase by 20%. 【5】

Facilitate the transportation and preservation of aquatic products

The main reason for meat spoilage: lipid oxidation


Astaxanthin has a strong antioxidant effect. Fish fed with astaxanthin have a longer shelf life in cold storage, and the degree of lipid oxidation increases as the feeding concentration decreases, that is, the preservation effect increases with the feeding concentration.


Advantages: high-efficiency biological preservatives, safe, reduce the use of chemical preservatives


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