Effects of micronutrients added to low-fishmeal diet on muscle composition, flesh quality, and antioxidant capacity of Largemouth bass-Reference-Cited by-同舟云学术

Effects of micronutrients added to low-fishmeal diet on muscle composition, flesh quality, and antioxidant capacity of Largemouth bass

Published:2023-07-24 Issue: Volume: Page:
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Author:

Li Haoming¹,Chen Liutong¹,Zhao Tengfei¹,Gong Shunlian¹,Liu Baowei¹,Yang Huijun,Xie Shiwei¹

Affiliation:

1. Guangdong Ocean University

Abstract

Abstract This study was to evaluate the impacts of micronutrients added to low-fishmeal diet on the flesh quality and immune response of largemouth bass, Micropterus salmoides. Two diets (FM48 and FM32) were formulated with 48% and 32% fishmeal, respectively, micronutrients (Zn, Mn, Se, VB12 and niacin) were added in FM32 to formulated the LFM diet. Largemouth bass with an initial weight of 12.65 ± 0.04 g were fed with three diets for eight weeks. The results showed that the feed coefficient rate of the shrimp in LFM group was significantly lower than that of the other two groups. There were no significant differences in muscle moisture, crude protein and crude lipids content among the three groups. The activity of muscle superoxide dismutase in the LFM group and FM48 group was significantly higher than that in the FM32 group. Zn content was highest in the muscles of FM48 group, and Se was higher in the muscles of the LFM group than that in the FM48 and FM32 groups. The results of histological analysis showed that the density of muscle fibers was improved after the addition of micronutrients. RT-qPCR results suggested that the expression of ribosomal protein, mammalian target of rapamycin, and eukaryotic translation initiation factor 4E-binding protein1 in the FM48 group were significantly higher than those in the FM32 group and LFM group. The expression of myogenic differentiation 1 was significantly upregulated in the LFM group, which was significantly higher than that in the FM48 and FM32 groups. The expression of tumor necrosis factorαwas significantly upregulated in the shrimp of LFM group compared with those in other groups. These results showed that the addition of micro-nutrients in low fishmeal diet did not affect the growth of largemouth bass, while increase the contents of Mn and Se in the muscle, enhanced the antioxidant capacity, promoted the proliferation of muscle fibers of largemouth bass.

Publisher

Research Square Platform LLC

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