Effects of replacing fishmeal with methanotroph (Methylococcus capsulatus, Bath) bacteria meal (FeedKind (R)) on growth and intestinal health status of juvenile largemouth bass (Micropterus salmoides)
文献类型： 外文期刊
作者： Zhang, Qile 1 ; Liang, Hualiang 2 ; Longshaw, Matt 3 ; Wang, Jia 4 ; Ge, Xianping 1 ; Zhu, Jian 2 ; Li, Songlin 5 ; Ren, Mingchun 1 ;
作者机构： 1.Nanjing Agr Univ, Wuxi Fisheries Coll, Wuxi 214081, Jiangsu, Peoples R China
2.Chinese Acad Fishery Sci CAFS, Freshwater Fisheries Res Ctr FFRC, Key Lab Genet Breeding Aquat Anim & Aquaculture B, Wuxi 214081, Jiangsu, Peoples R China
3.Calysta UK Ltd, Redcar, Cleveland, England
4.Calysta Inc, San Mateo, CA USA
5.Shanghai Ocean Univ, Res Ctr, Minist Agr & Rural Affairs Environm Ecol & Fish N, Shanghai 20136, Peoples R China
关键词： Methanotroph bacteria meal; Growth performance; Intestinal health; Largemouth bass (Micropterus salmoides)
期刊名称：FISH & SHELLFISH IMMUNOLOGY （ 影响因子：4.622； 五年影响因子：4.799 ）
ISSN： 1050-4648
年卷期： 2022 年 122 卷
页码：
收录情况： SCI
摘要： A ten-week feeding trial evaluated the feasibility of methanotroph (Methylococcus capsulatus) bacteria meal (FeedKind (R), FK) as a fishmeal substitute in largemouth bass (Micropterus salmoides) diets. Six isonitrogenous and isoenergetic diets with different inclusion levels of FK (0 (fishmeal group), 43, 86, 129, 172 and 215 g/kg) were formulated to replace 0, 50, 100, 150, 200 and 250 g/kg fishmeal, respectively. The results showed that FK inclusion level could reach 129 g/kg without significantly affecting growth or feed coefficient rate (P > 0.05), while growth performance was decreased and feed coefficient rate increased when FK inclusion levels exceeded 129 g/kg (P < 0.05). Increase in FK inclusion levels tended to reduce plasma total cholesterol and total triglyceride whilst plasma total protein, albumin, alanine aminotransferase and aspartate aminotransferase in FK treatment groups were unchanged compared with fishmeal group (P > 0.05). FK inclusion levels at 43 g/kg and 86 g/kg were not detrimental to intestinal morphology whilst it was unfavourable when FK inclusion levels exceeded 86 g/kg as the total length of intestinal wall thickness and villus height, villus height were obviously decreased compared with fishmeal group (P < 0.05). As regards to inflammatory cytokine genes, FK instead of fishmeal increased the expression levels of TLR2, RelA, TNF-alpha, IL-1 beta, IL-10 and TGF-beta, 43 g/kg and 86 g/kg FK decreased the expression level of Caspase-3 (P < 0.05). In conclusion, 129 g/kg FK can replace 150 g/kg fishmeal without negative effects on the growth performance, and replacing 100 g/kg fishmeal with 86 g/kg FK is more beneficial to intestinal health.
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