Colonization of the gastrointestinal tract of the farmed South African abalone Haliotis midae by the probionts Vibrio midae SY9, Cryptococcus sp. SS1, and Debaryomyces hansenii AY1

Viable cell counts and/or in situ hybridization were used to determine whether the probionts Vibrio midae SY9, Cryptococcus sp. SS1, and Debaryomyces hansenii AY1 can colonize the gastrointestinal tract of the South African abalone Haliotis midae. The number of culturable probiotic cells reisolated...

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Bibliographic Details
Published in:Marine biotechnology (New York, N.Y.) N.Y.), 2006-06, Vol.8 (3), p.246-259
Main Authors: Macey, Brett M, Coyne, Vernon E
Format: Article
Language:English
Subjects:
Animal Feed - microbiology
Animals
Aquaculture
Ascomycota - physiology
Cryptococcus
Cryptococcus - physiology
Debaryomyces hansenii
Feeds
Gastrointestinal tract
Gastrointestinal Tract - microbiology
Haliotis
Haliotis midae
Marine
Marine biology
Mollusca - microbiology
Probiotics
Proteases
Studies
Vibrio
Vibrio - physiology
Vibrio midae
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Summary:Viable cell counts and/or in situ hybridization were used to determine whether the probionts Vibrio midae SY9, Cryptococcus sp. SS1, and Debaryomyces hansenii AY1 can colonize the gastrointestinal tract of the South African abalone Haliotis midae. The number of culturable probiotic cells reisolated from H. midae fed probiotic-supplemented feed for 3 weeks ranged from 10(6) to 10(7) cfu/g gut material. A significant decrease (P < 0.05) in probiont numbers 2 days after feeding the probiotic-supplemented feed had been halted correlated with a significant decrease (P < 0.05) in intestinal protease and amylase activity. There was a positive correlation between Cryptococcus sp. SS1 and amylase activity (r2= 0.681) and V. midae SY9.8 and protease activity (r2= 0.711) in the H. midae intestine. Although culturable probionts were isolated from abalone that had not been fed probiotic-supplemented feed for a 2-week period, the drop in the number of probiotic cells colonizing the abalone digestive tract 2 days after feeding with the probiotic-supplemented feed had been halted indicates that farmed abalone should be fed probiotic-supplemented feed at least every second day for maximum benefit.
ISSN:1436-2228
1436-2236
DOI:10.1007/s10126-005-0113-9