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RE: Thiaminase and feeder fish for Drys

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Posted by: skiploder at Wed Oct 7 00:15:30 2009  [ Report Abuse ] [ Email Message ] [ Show All Posts by skiploder ]  
   

Salmon and trout are always good choices. I've never had a problem getting young drys to take trout or salmon fillets.

I did some research on silversides awhile back and discovered that only one brand of commercial frozen silversides were actual silversides (which are free of thiaminase).

The others were assorted baitfish and all contained thiaminase.

For example:

Hikari is using pseudohemiculter dispair which is a cyprinid (as are goldfish and other known carriers of thiaminase). My bet would be that they contain thiaminase - the rep even wrote back that they add thiamin to these fish to counteract thiaminase.

That's junk science and doesn't help - Hikari should know better. Hikari silversides are not silversides and should be avoided.

H20 Life Foods says that they use "blue anchovies" from Vietnam. These could be either engraulidae, stolephorus or cetengraulis. The fact that they can't tell me which species it is and the fact that they are - like Hikari - mislabeled as silversides is a big red flag.

Engraulidae are confirmed carriers of thiaminase. So H20 Life Foods also is a no - no.

OmegaSea uses Hemisalanx Prognathus Regan (Salanx Sp.) Hemisalanx are related to true smelts. Some smelts have thiaminase. Some do not.

There is nothing I can find verifying their claims that Salangidae are thiaminase free.

However, it is clear that these are also not true silversides.

SF Bay Brand was the only one I cold verify are selling true silversides (menidia menidia) free of thiaminase.


   

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