Starch in aquafeeds: the benefits of a high amylose to amylopectin ratio and resistant starch content in diets for the carnivorous fish, largemouth bass (Micropterus salmoides)

Li, Songlin, Sang, Chunyan, Turchini, Giovanni M, Wang, An, Zhang, Jiacan and Chen, Naisong 2020, Starch in aquafeeds: the benefits of a high amylose to amylopectin ratio and resistant starch content in diets for the carnivorous fish, largemouth bass (Micropterus salmoides), British journal of nutrition, vol. 124, no. 11, pp. 1145-1155, doi: 10.1017/S0007114520002214.

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Title Starch in aquafeeds: the benefits of a high amylose to amylopectin ratio and resistant starch content in diets for the carnivorous fish, largemouth bass (Micropterus salmoides)
Author(s) Li, Songlin
Sang, Chunyan
Turchini, Giovanni MORCID iD for Turchini, Giovanni M orcid.org/0000-0003-0694-4283
Wang, An
Zhang, Jiacan
Chen, Naisong
Journal name British journal of nutrition
Volume number 124
Issue number 11
Start page 1145
End page 1155
Total pages 11
Publisher Cambridge University Press
Place of publication Cambridge, Eng.
Publication date 2020-12-14
ISSN 0007-1145
1475-2662
Keyword(s) Largemouth bass
Amylose
Amylopectin
Carbohydrate
Glycogen
Summary Abstract Aquafeeds for carnivorous species face a nutritional–technological conundrum: containing sufficient starch to meet specific manufacturing requirements for binding, extrusion and expansion, but ideally containing as little starch as possible owing to their limited ability to utilise carbohydrates. The present study evaluated the effects of dietary starch with different amylose to amylopectin ratios and resistant starch contents on growth performance, hepatic glycogen accumulation and glucose metabolism of an important cultured carnivorous finfish, largemouth bass (Micropterus salmoides). A common starch source (α-cassava starch (CS)) was tested as is or after being enzymatically de-branched at three different inclusion levels in diets for largemouth bass. Results showed that the increased dietary starch levels compromised performance and high dietary α-CS content led to obvious liver damage. However, the growth performances of fish fed the diets with de-branched starch (DS) were improved, and no manifest liver damages were observed even at the higher inclusion level. The increasing dietary starch contents significantly increased hepatic glycogen accumulation, but not when DS was used. High dietary starch content, without regard to starch sources, had no effect on the expression of glucose metabolism-related genes, except for down-regulation of insulin receptor expression. However, the use of dietary DS promoted the expression of genes involved in the insulin pathway and glycolysis. In conclusion, this study showed that the use of starch sources with a high amylose to amylopectin ratio and resistant starch in the feed for cultured carnivorous finfish could alleviate the hepatic glycogen deposition through regulating the insulin pathway and glycolysis.
Language eng
DOI 10.1017/S0007114520002214
Indigenous content off
Field of Research 0702 Animal Production
0908 Food Sciences
1111 Nutrition and Dietetics
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Persistent URL http://hdl.handle.net/10536/DRO/DU:30140928

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