Dietary carbohydrate‐to‐lipid ratios modulate juvenile hybrid grouper (♀  Epinephelus fuscoguttatus  × ♂  E. lanceolatus ): Effects on growth, serum biochemistry, intestinal digestion and hepatic metabolism of glucose and lipid | Zendy

Chen Guofeng | Zendy; Qian Jiahao | Zendy; Liu Hongyu | Zendy; Tan Beiping | Zendy; Dong Xiaohui | Zendy; Yang Qihui | Zendy; Chi Shuyan | Zendy; Zhang Shuang | Zendy

Open Access

Dietary carbohydrate‐to‐lipid ratios modulate juvenile hybrid grouper (♀ Epinephelus fuscoguttatus × ♂ E. lanceolatus ): Effects on growth, serum biochemistry, intestinal digestion and hepatic metabolism of glucose and lipid

Author(s) -

Chen Guofeng,

Qian Jiahao,

Liu Hongyu,

Tan Beiping,

Dong Xiaohui,

Yang Qihui,

Chi Shuyan,

Zhang Shuang

Publication year - 2021

Publication title -

aquaculture nutrition

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.941

H-Index - 79

eISSN - 1365-2095

pISSN - 1353-5773

DOI - 10.1111/anu.13275

Subject(s) - biology , grouper , lipid metabolism , carbohydrate metabolism , hepatic lipase , lipogenesis , biochemistry , medicine , endocrinology , carbohydrate , pyruvate carboxylase , digestion (alchemy) , lipolysis , metabolism , enzyme , lipase , adipose tissue , chemistry , chromatography , fishery , fish <actinopterygii>

A 56 day feeding trial was conducted to study effects of different carbohydrate‐to‐lipid (CHO.L −1 ) ratios on growth, serum biochemistry, intestinal digestion and hepatic metabolism of glucose and lipid in juvenile hybrid grouper ( Epinephelus fuscoguttatus × ♂ E . lanceolatus ). Results showed that moderate CHO.L −1 ratio resulted in better growth performance ( p < .05). In serum, glucose, insulin and alanine aminotransferase were enhanced as CHO.L −1 ratios increased, whereas cholesterol was reduced ( p < .05). Increased CHO.L −1 ratios resulted in raised activity of amylase and reduced activity of lipase in gut ( p < .05). Gene expression related to glucose transporters improved ( p < .05). Enzyme activity and gene expression involved in hepatic glycolysis improved in a limited manner, whereas enzyme activity and gene expression related to hepatic gluconeogenesis and lipolysis were inhibited in high CHO.L −1 ratio group. Enzyme activity of hepatic lipogenesis showed an elevated trend, including acetyl‐CoA carboxylase and fatty acid synthase ( p < .05). In conclusion, different dietary CHO.L −1 ratios affected growth, serum biochemistry, intestinal digestion and hepatic metabolism of glucose and lipid in grouper. Moreover, juvenile grouper could utilize diet containing moderate CHO.L −1 ratio.

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