Effect of yeast polysaccharide on some hematologic parameter and gut morphology in channel catfish (Ictalurus punctatus) |
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Authors: | Huiling Zhu Huiyu Liu Jing Yan Rui Wang Lihe Liu |
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Institution: | Hubei Key Laboratory of Animal Nutrition and Feed Science, Department of Feed Science, Wuhan Polytechnic University, Wuhan, 430023, People's Republic of China, zhuhuiling2004@sina.com. |
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Abstract: | A study was conducted to investigate the effect of dietary yeast polysaccharides on some hematologic parameters and intestinal morphology of channel catfish. Channel catfish were fed diets containing yeast polysaccharides at 0 (control), 0.1, 0.2, or 0.3?% for 7?weeks. Each diet was provided to 10 channel catfish specimens (5.82?±?0.13?g initial weight) replicated 3?times in individual 250?L fiberglass tanks. Some hematologic parameters, leukocyte phagocytic activity, and intestinal morphology were monitored. After 7?weeks of trial, 0.2?% yeast polysaccharides resulted in significantly higher (P?0.05) monocyte numbers. Furthermore, fish fed 0.2?% yeast polysaccharide diet had higher (P?0.05) phagocytic rate of leukocyte. And 0.3?% yeast polysaccharide enhanced (P?0.05) phagocytic index of leukocyte. Histological evaluation showed yeast polysaccharide supplementation increased the height of intestine fold (0.1, 0.2 and 0.3?%) and the thick of muscular layers (0.2?%) in intestine (P?0.05). In addition, 0.1 and 0.3?% yeast polysaccharide supplementation improved the number of goblet cells (P?0.05). The results of this trial indicate that yeast polysaccharides supplementation could affect blood monocytes, improve leukocytes phagocytic activity, and the development of intestine in channel catfish. |
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