Subject: fish physiology

From: [email-masked] (Ronda Dillon)
Date: 30 Aug 1995 14:35:10 GMT

Question? Can specific carotenoids of rainbow trout and other salmoinds 
be synthesized metabolically in the fish from other types of 
carotenoids?  That is, can canthaxanthin be produced in fish flesh by the 
conversion of dietary fed precursors other than canthaxanthin?

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From: "Dr. Kim Jauncey" <[email-masked]>
Date: 6 Sep 1995 14:39:05 GMT

Basically, the answer is no. Teleosts don't do much interconversion of 
ingested carotenoids, they are deposited as fed. Crustacea could do it 
though. There are quite a lot of references on this if you need some.