Volume 13, Issue 2 (2024)
JFST 2024, 13(2): 55-68 |
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Zare R, Abedian Kenari A. ٍEvaluation of Growth, body composition, physiological and immune parameters of Siberian sturgeon (Acipenser baerii) fed with lactic acid and probiotic Protexin dietary supplements. JFST 2024; 13 (2) :55-68
URL: http://jfst.modares.ac.ir/article-6-75009-en.html
URL: http://jfst.modares.ac.ir/article-6-75009-en.html
1- Tarbiat Modares University
2- tarbiat Modares University ,aabedian@modares.ac.ir
2- tarbiat Modares University ,
Abstract: (467 Views)
The use of probiotics and organic acids is an ideal and suitable alternative to antibiotics in aquaculture. Currently, there is not enough knowledge about the specific and combined effects of these additives in the diet of sturgeon. Therefore, the aim of this research was to evaluate the use of lactic acid and probiotic supplements (Protexin) and their combination in the diet of Siberian sturgeon (Acipenser baerii). Therefore, 160 healthy fish with an average body weight of 54.85 ± 0.36 grams were randomly divided into 4 experimental groups in 3 replicates. Fish were fed four diets including a control diet without additives (diet 1), a control diet with 2% lactic acid (diet 2), a control diet with a combination of 2% lactic acid and 0.01% Protexin (diet 3), and a control diet with 0.01% Protexin (diet 4). Fish were fed three times a day to satiation for 9 weeks. At the end of the experiment, growth and physiological parameters were measured. The results showed that lactic acid alone and in combination with Protexin increased body weight and specific growth rate. The feed conversion ratio decreased in treatments where lactic acid was used alone or in combination with Protexin (P<0.05). Mortality rates were zero in all treatments during the experimental period. The carcass protein of Siberian sturgeon in diets supplemented with a combination of lactic acid and Protexin showed significant improvement compared to other groups (P<0.05). Addition of lactic acid and Protexin either separately or in combination led to a decrease in carcass fat content (P<0.05). The lowest intestinal pH was observed in the diet supplemented with lactic acid along with Protexin, while the highest was in the control group. Additionally, the total number of lactic acid bacteria in the intestines of fish fed with lactic acid along with Protexin showed a significant increase compared to other treatments (P<0.05). The combined addition of lactic acid with Protexin significantly increased lysozyme and complement activity in fish blood (P<0.05). In general, the separate and combined use of lactic acid (2 %) and Protexin (0.01 %) in the diet of Siberian sturgeon improved the performance of this fish.
Article Type: Original Research |
Subject:
Nutrition and Feed Technology
Received: 2024/05/8 | Published: 2024/07/1
Received: 2024/05/8 | Published: 2024/07/1
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