The Combined Efficiency of Dietary Isomaltooligosaccharides and Bacillus spp. on the Growth, Hemato-Serological, and Int
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The Combined Efficiency of Dietary Isomaltooligosaccharides and Bacillus spp. on the Growth, Hemato-Serological, and Intestinal Microbiota Indices of Caspian Brown Trout (Salmo trutta caspius Kessler, 1877) Maryam Aftabgard 1 & Alireza Salarzadeh 1 & Mahmoud Mohseni 2 & Amir Houshang Bahri Shabanipour 1 & Mohammad Ebrahim Jalil Zorriehzahra 3
# Springer Science+Business Media, LLC, part of Springer Nature 2017
Abstract The combined effects of a commercial probiotic, BetaPlus®, and a prebiotic, isomaltooligosaccharides (IMOS) on the growth, survival rate, intestinal microbiota, and hemato-immunological parameters were evaluated in Caspian brown trout (Salmo trutta caspius Kessler, 1877). Caspian brown trout fingerlings (~ 9 g) were fed a control diet (basal diet) or a synbiotic diet (the basal diet + 2 g kg−1 IMOS + 1 g kg−1 BetaPlus®) for 7 weeks. At the end of this trial, fish fed the synbiotic diet showed significant improvements in body weight increase, feed conversion ratio, and survival rate compared with fish fed the control diet (P < 0.05). In addition, fish fed the synbiotic diet had the highest levels of white blood cells, monocytes, and neutrophils (P < 0.05), while the red blood cells, hemoglobin, hematrocrit, mean corpuscular volume, and lymphocytes were significantly higher in the control group (P < 0.05). The serum triglycerides, cholesterol, total protein, albumin, albumin/globulin ratio, and immunoglobulin M levels, as well as alanine aminotransferase and lactate dehydrogenase activities were higher in the synbiotic group than in the control group (P < 0.05). In addition, fish fed the synbiotic diet showed significantly higher gut total viable aerobic bacterial counts and lactic acid bacteria (P < 0.05). The results demonstrated that BetaPlus® in combination with IMOS enhanced the growth, survival rate, intestinal microbiota, and some haemato-immunological parameters in Caspian brown trout fingerlings. Keywords Isomaltooligosaccharides . BetaPlus® . Hemato-immunological . Gut microbiota . Salmo trutta caspius
Introduction In recent years, it has been increasingly common to study the effects of functional feed additives on improving * Maryam Aftabgard [email protected] 1
Department of Fisheries, College of Natural Resources, Bandar Abbas Branch, Islamic Azad University, P.O.Box: 79159–1311, Bandar Abbas, Iran
2
Coldwater Fishes Research Center (CFRC), Iranian Fisheries Science Research Institute (IFSRI), Agricultural Research, Education and Extension Organization (AREEO), P.O.Box: 46815–467, Tonekabon, Iran
3
Department of Aquatic Animal Health and Diseases, Iranian Fisheries Science Research Institute (IFSRI), Agricultural Research, Education and Extension Organization (AREEO), P.O.Box: 15745– 133, Tehran, Iran
aquaculture production, as well as the health and welfare status of fish. The Food and Agriculture Organization (FAO) and the World Health Organization (WHO) defined probiotics as BLive microorganisms which when administered in adequate amounts confer a health benefit on the
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