Long- and short-term dietary β-glucan improves intestinal health and disease resistance in pearl gentian grouper (Epinephelus lanceolatus♂ x Epinephelus fuscoguttatus♀)
文献类型： 外文期刊
作者： Wang, Fan 1 ; Wang, Zhiwen 1 ; Cao, Junming 3 ; Lu, Yishan 1 ;
作者机构： 1.Guangdong Ocean Univ, Guangdong Prov Engn Res Ctr Aquat Anim Hlth Assess, Shenzhen Publ Serv Platform Evaluat Marine Econ An, Shenzhen Inst, Shenzhen 518210, Peoples R China
2.Guangxi Acad Sci, Guangxi Acad Marine Sci, Guangxi Key Lab Marine Environm Sci, Nanning 530000, Guangxi, Peoples R China
3.Guangdong Ocean Univ, Coll Fishery, Zhanjiang 524088, Peoples R China
4.Guangdong Acad Agr Sci, Guangzhou 510640, Peoples R China
关键词： beta-Glucan; Administration period; Intestinal health; Fish
期刊名称：FISH PHYSIOLOGY AND BIOCHEMISTRY （ 影响因子：2.9； 五年影响因子：3.1 ）
ISSN： 0920-1742
年卷期： 2024 年
页码：
收录情况： SCI
摘要： beta-Glucans are immunostimulants and are widely used in aquaculture industry. The present study was conducted to evaluate the effects of different periods of beta-glucan management on growth performance, intestinal health, and disease resistance in pearl gentian grouper (Epinephelus lanceolatus male x Epinephelus fuscoguttatus female). A commercial feed was used as control diet (CD), and the beta-glucan diet (beta D) was based on CD and further supplemented with 0.1% beta-glucan. Grouper in control and long-term beta-glucan diet (LGD) groups were fed with CD and beta D for 8 weeks, respectively. Groupers in short-term beta-glucan diet (SGD) group were fed with CD for the first 4 weeks and beta D for the last 4 weeks. We found that LGD and SGD had no effect on growth performance but reduced the mortalities of grouper after challenging with Vibrio harveyi. In addition, both LGD and SGD increased intestinal morphology, enhanced antioxidant capacity, enhanced immunity, inhibited apoptosis, altered the transcriptional profile, and activated mitogen-activated protein kinase (MAPK) and nuclear factor kappa-B (NF-kappa B) signaling pathway in the intestine of grouper. Furthermore, the effect of LGD on most of the above parameters was comparable to that of SGD. In conclusion, LGD and SGD did not affect growth rate parameters but enhanced the intestinal health and disease resistance of pearl gentian grouper.
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