I request you to share your view on the importance of astaxanthin in fish and shrimp feed. Whom do you think will require a higher amount of astaxanthin fish or shrimp?
Dear Sir, I am not very much sure about role of Astaxanthin in poultry nutrition.
Astaxanthin is a fat soluble nutrient with antioxidant properties that is valuable for human and animal nutrition. It is advantageous for aquaculture feeds to impart a similar nutrient content to seafood obtained from wild stocks. Moreover, the reddish pigment is valued by consumers.
You can rfind the links below:
http://www.trjfas.org/uploads/pdf_256.pdf
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4952235/
The astaxanthin is present in the antartic krill (Euphasia superba). One of the largest suppliers of krill oil and krill meal is the norwegian company Akerbiomarine. In the webpage www.qrillaqua.com you can find commercial but very useful information about this topic both for fish and shrimp feed.
Being the most abundant carotenoid in the marine environment, astaxanthin plays an important role in the immune systems of shrimp and fish. It is an antioidant, provitamin A, and is required for the successful production of eggs and larvae. From an economic standpoint, astaxanthin is absolutely crucial in imparting the desirable red/pink coloration of crustaceans and fish such as salmon, sea bream, grouper, etc.
Thank you Dr. Gustavo Guida and Dr. Floreto for adding the answer to my query.
Astaxanthin shows as a red pigment, other than when mix with different proteins, the light absorbance shifts and cause crustaceans to variety in color from green, yellow, blue to brown. The red color of cooked crustaceans is formed by the free of the individual carotenoid prosthetic group (astaxanthin) from the carotenoproteins when denatured through the heat of cooking.
The short of of dietary astaxanthin in cultured Penaeus monodon has been revealed to be the reason of "Blue Color Syndrome.
Nice review on astaxanthin is recently published in journal of reviews in aquaculture may 2017 issue. Check it out
Astaxanthin has strong action like an inhibitor of lipid peroxidation arbitrated by active shapes of oxygen
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