Effects of Enzyme-Producing Probiotic Bacteria Isolated from the Gastrointestinal Tract of Trout on the Growth Performance, Survival, and Digestive Enzyme Activity of Rainbow Trout Fry (Oncorhynchus mykiss)

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dc.contributor.authorKoca, Seval Bahadır
dc.contributor.authorYigit, Nalan Özgür
dc.contributor.authorDidinen, Behire Işıl
dc.contributor.authorMetin, Secil
dc.contributor.authorBayrak, Halit
dc.contributor.authorOnuk, Ertan Emek
dc.contributor.authorİlhan, İlter
dc.contributor.authorEralp, Hasan
dc.contributor.authorDiler, İbrahim
dc.date.accessioned2016-05-05T22:56:05Z
dc.date.available2016-05-05T22:56:05Z
dc.date.issued2015
dc.description.abstractIn this study, we investigated the effects of enzyme-producing probiotic bacteria isolated from the gastrointestinal tract of rainbow trout on the growth performance, feed conversion ratio, and digestive enzyme activity, of fry (Oncorhynchus mykiss). Three isolates (G8/2013, T7/2013 and U5/2013) of candidate bacteria elicited the highest protease, lipase, and amylase activities, respectively. Isolates were identified as Aeromonas sp., Bacillus sp. and Citrobacter braakii by morphological, physiological, biochemical characterizations as well as 16S rRNA gene sequence analysis. The fry basal diet was supplemented with probiotics at varying concentrations; G8 group, Aeromonas sp. 1.72 x 108 CFU/g; U5 group, Bacillus sp. 3.01 x 108 CFU/g; T7 group, C. braakii 2.96 x 108 CFU/g and a mixed group (same bacterial concentrations), and control group (no bacteria). The rainbow trout fry were fed ad libitum in triplicate treatments with supplemented and non-supplemented probiotic diets for 70-days. The total bacterial count in the intestine was significantly higher in the mixed group (30th and 50th days) and U5 group (50th and 70th days) compared with the control group. However, there was no significant difference in weight gain, specific growth rate (SGR), feed conversion ratio (FCR), nutrient digestibility, or digestive enzyme activity among the groups.a
dc.format.extent10 pages
dc.identifier.issn0792-156X
dc.identifier.urihttp://hdl.handle.net/10524/49202
dc.relation.ispartofThe Israeli Journal of Aquaculture - Bamidgeh
dc.subjectenzyme-producing bacteria
dc.subjectprobiotic
dc.subjectrainbow trout fry
dc.subjectenzyme activity
dc.subject.lcshFish culture--Israel.
dc.subject.lcshFish culture.
dc.titleEffects of Enzyme-Producing Probiotic Bacteria Isolated from the Gastrointestinal Tract of Trout on the Growth Performance, Survival, and Digestive Enzyme Activity of Rainbow Trout Fry (Oncorhynchus mykiss)
dc.typeArticle
dc.type.dcmiText

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Volume 67, 2015