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Hoseini S M, Pagheh E, Aghaei Moghaddam A, Gharavi B, Ghelichpour M. Effect of adding cottonseed meal along with yeast (Saccharomyces cerevisiae PTCC5052) or iron-enriched yeast to diet of rainbow trout (Oncorhynchus mykiss) on economic justification of production, blood biochemical properties, microbial flora and histopathological status of the intestine. JFST 2025; 14 :13-27
URL: http://jfst.modares.ac.ir/article-6-70151-en.html
Effect of adding cottonseed meal along with yeast (Saccharomyces cerevisiae PTCC5052) or iron-enriched yeast to diet of rainbow trout (Oncorhynchus mykiss) on economic justification of production, blood biochemical properties, microbial flora and histopathological status of the intestine
Seyyed Morteza Hoseini * 1, Esmail Pagheh2 , Abbasali Aghaei Moghaddam2 , Behrouz Gharavi2 , Melika Ghelichpour2
1- Inland Waters Aquatics Resources Research Center, Iranian Fisheries Sciences Research Institute, Agricultural Research, Education and Extension Organization, Gorgan, Iran , seyyedmorteza.hoseini@gmail.com
2- Inland Waters Aquatics Resources Research Center, Iranian Fisheries Sciences Research Institute, Agricultural Research, Education and Extension Organization, Gorgan, Iran
Abstract:   (197 Views)
The aim of this study was to evaluate the effects of adding cottonseed meal along with the yeast Saccharomyces cerevisiae strain PTCC5052—either iron-enriched or non-enriched—on the economic justification of production, biochemical blood characteristics, microbial flora, and histopathological status of the intestine in juvenile rainbow trout. Fish were distributed in four treatments with four replications. One control diet without cottonseed meal, one diet containing 15% cottonseed meal, and two diets containing 15% cottonseed meal + 1 × 108 cfu/g of yeast or iron-enriched yeast were provided to the fish for 8 weeks. The results indicated no significant differences in fish production efficiency, plasma biochemical indices, and histopathological status of the intestine among the treatments. The cost of feed per unit of fish production in the treatments containing cottonseed meal significantly decreased compared to the control treatment, with the lowest cost was observed in the treatment without yeast. No significant differences in microbial abundance were observed between the control treatment and the cottonseed meal treatment; however, the addition of yeast or iron-enriched yeast to the diet resulted in an increased density of the genus Saccharomyces, a reduction in the density of the genera Aeromonas and Vibrio, and a decrease in the density of Yersinia ruckeri in the fish intestine. The results of this study indicate that adding 15% cottonseed meal to the diet of rainbow trout can enhance the economic justification for fish production, and the addition of yeast to this diet improves the microbial flora in the fish's intestine
 
Keywords: Cottonseed meal, Growth, Microbial flora, Blood, Histopathology
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Article Type: Original Research | Subject: Nutrition and Feed Technology
Received: 2023/06/29 | Published: 2025/03/16
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