Effects of different protein and lipid levels on the growth performance and intestinal microflora of loach (<i>Paramisgurnus dabryanus</i>)

Effects of different protein and lipid levels on the growth performance and intestinal microflora of loach (Paramisgurnus dabryanus)

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Zirui Wang^a^,^b, Shuyao Li^a^,^b, Qiubai Zhou^a^,^b^,^*, Jinhua Zhang^a^,^b, Yongan Li^a^,^b, Youjie Li^a^,^b, Zhiwen Yuan^a^,^b, Guanghua Huang^a^,^b

Animal Nutrition | 2023, 13(1) : 229 - 239

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Animal Nutrition | 2023, 13(1): 229-239

• Original Research Article •

Effects of different protein and lipid levels on the growth performance and intestinal microflora of loach (Paramisgurnus dabryanus)

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Zirui Wang^a^,^b, Shuyao Li^a^,^b, Qiubai Zhou^a^,^b^,^*, Jinhua Zhang^a^,^b, Yongan Li^a^,^b, Youjie Li^a^,^b, Zhiwen Yuan^a^,^b, Guanghua Huang^a^,^b

Affiliations

^aCollege of Animal Science and Technology, Jiangxi Agricultural University, Nanchang 330045, China

^bKey Laboratory of Featured Hydrobios Nutritional Physiology and Healthy Breeding, Nanchang, 330045, China

Published: 2023-06-10 doi: 10.1016/j.aninu.2023.02.007

Outline

Abstract

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The aim of this study was to examine the effects of dietary protein and lipid levels on the growth performance and homeostasis of the intestinal flora in Paramisgurnus dabryanus. An 8-week 3 × 3 twofactorial experiment was conducted to investigate the interaction between dietary crude protein (CP: 30%, 35%, 40%) and ether extract (EE: 6%, 10%, 14%) on the growth rate and the intestinal microflora of P. dabryanus. A total of 2,160 fish (5.19 ± 0.01 g) were randomly allotted to 36 aquariums each with 60 fish. Fish were fed the experimental diet twice daily. Results revealed that weight gain rate (WGR), specific growth rate (SGR), protein efficiency ratio and net protein utilization significantly increased when increasing protein levels from 30% to 40% (P < 0.05). BothWGR and SGR enhanced first but reduced thereafter with maximum value at 10% lipid level as dietary lipid increased from 6% to 14% (P < 0.05). Significant interactions between protein and lipid were found with feed conversion rate, lipid efficiency ratio and net lipid utilization (P < 0.05). At the phylum level, Proteobacteria and Actinobacteria were the dominant bacteria; at the genus level, Burkholderia-Caballeronia-Paraburkholderia was the dominant bacteria. Fish fed the diet containing 10% lipid had a higher abundance of Proteobacteria and unclassified_f_Eenterobacteriaceae than those fed the 14% lipid diet, and a higher abundance of Rhodobacter than those fed the 6% lipid diet (P < 0.05). Analysis of the predicted functions showed that metabolism in the intestine of fish in the CP40EE10 group was more active than that in CP30EE14 group. Polynomial regression analysis found that a diet containing 40.87% protein and 9.88% lipid can be considered optimal for P. dabryanus.

Key words

Paramisgurnus dabryanus / Protein/lipid ratio / Growth performance / Feed utilization / Intestinal microflora

Cite this Article

Zirui Wang, Shuyao Li, Qiubai Zhou, Jinhua Zhang, Yongan Li, Youjie Li, Zhiwen Yuan, Guanghua Huang. Effects of different protein and lipid levels on the growth performance and intestinal microflora of loach (Paramisgurnus dabryanus)[J]. Animal Nutrition, 2023 , 13 (1) : 229 -239 . DOI: 10.1016/j.aninu.2023.02.007

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Year 2023 volume 13 Issue 1

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Article Info

doi: 10.1016/j.aninu.2023.02.007

Receive Date：2022-07-28
Online Date：2026-02-03
Published：2023-06-10

Article Data

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History

Received：2022-07-28
Revised：2022-12-27
Accepted：2023-02-23

Affiliations

^aCollege of Animal Science and Technology, Jiangxi Agricultural University, Nanchang 330045, China

^bKey Laboratory of Featured Hydrobios Nutritional Physiology and Healthy Breeding, Nanchang, 330045, China

Corresponding:

^* Corresponding author. E-mail address: zhouqiubai@163.com (Q. Zhou).

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表12种不同金属材料的力学参数

科 Family	属数 Number of genus	种数 Number of species	占总种数比例 Percentage of total species (%)	属 Genus	种数 Number of species	占总种数比例 Percentage of total species (%)
鹅膏菌科Amanitaceae	2	11	5.26	鹅膏菌属 Amanita	10	4.78
小菇科 Mycenaceae	2	12	5.74	丝盖伞属 Inocybe	5	2.39
多孔菌科 Polyporaceae	8	14	6.70	蜡蘑属 Laccaria	5	2.39
红菇科 Russulaceae	3	23	11.00	小皮伞属 Marasmius	6	2.87
				小菇属 Mycena	11	5.26
				光柄菇属 Pluteus	5	2.39
				红菇属 Russula	17	8.13
				栓菌属 Trametes	5	2.39

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