USE OF MARINE YEAST IN SHRIMP FARMS
From: Fabian Jijon fabianjt@porta.net
To: shrimp@yahoogroups.com
Sent: 12 October 2004
QUESTION:
Some Ecuadorian shrimp farms use marine yeast
replicated in the
farm with molasses, and applied in the water and sometimes in the feed too,
the common feed used is about 28% for G.O. and for the start 35 % CP feed. I
have some questions about it:
1.- How digestible are the marine yeast in the shrimps gut?
2.- How to dosage the molasses and the yeast (cells/ml)?
3.- Is the C:N ratio based on the nitrogen in the feed? Or we have to
consider the nitrogen in the water column too?
4.- Is it better to use marine yeast in the feed or in the water? I guess
in the feed.
e-mail: fabianjt@porta.net
***************
comments 1:
My suggestion is to add the yeast to the feed,
the effect may be more as a nutrient than as a probiotic. For a probiotic
effect the yeast has to be alive & healthy when consumed, be active in
the gut, be present in sufficient numbers and the effects of its activity
must be beneficial to the animal; depending on the yeast and the process
used you might hit upon a combination that delivers a probiotic effect,
whereas you can be fairly sure the mix will be of at least some nutritional
value (unless of course you get pathogens growing during the replication
process). If you stick to proven commercial products then these
uncertainties are removed.
Kevin Healey
e-mail: khealey@iahp.com.au
www.iahp.com.au