Effects of dietary choline on liver lipid composition, liver histology and plasma biochemistry of juvenile yellowtail kingfish (Seriola lalandi)

Liu, Angela, Pirozzi, Igor, Codabaccus, Basseer M., Stephens, Frances, Francis, David S., Sammut, Jesmond and Booth, Mark A. 2020, Effects of dietary choline on liver lipid composition, liver histology and plasma biochemistry of juvenile yellowtail kingfish (Seriola lalandi), British Journal of Nutrition, no. First View, doi: 10.1017/s0007114520003669.

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Title Effects of dietary choline on liver lipid composition, liver histology and plasma biochemistry of juvenile yellowtail kingfish (Seriola lalandi)
Author(s) Liu, Angela
Pirozzi, Igor
Codabaccus, Basseer M.
Stephens, Frances
Francis, David S.ORCID iD for Francis, David S. orcid.org/0000-0002-4829-6926
Sammut, Jesmond
Booth, Mark A.
Journal name British Journal of Nutrition
Issue number First View
Total pages 15
Publisher Cambridge University Press (CUP)
Place of publication Cambridge, Eng.
Publication date 2020-09-18
ISSN 0007-1145
1475-2662
Keyword(s) 2-Amino-2-methyl-1-propanol
Fatty acids
Hepatic lesion
Lipid classes
Plasma lipids
choline chloride
long-chain PUFA
melanomacrophage centre
phosphatidylcholine
phosphatidylethonolamine
yellow kingfish
Summary Choline plays a crucial role in lipid metabolism for fish, and its deficiency in aquafeed has been linked to compromised health and growth performance. A 56-d experiment was conducted to examine the effects of dietary choline on lipid composition, histology, and plasma biochemistry of yellowtail kingfish (Seriola lalandi; YTK; 156 g initial body weight). The dietary choline content ranged from 0.59 to 6.22 g/kg diet. Three grams of 2-amino-2-methyl-1-propanol (AMP)/kg was added to diets, except for a control diet, to limit de novo choline synthesis. The results showed that the liver lipid content of YTK was similar among diets containing AMP and dominated by free fatty acids (FFA). In contrast, fish fed the control diet had significantly elevated liver triacylglycerol (TAG). Generally, the saturated fatty acids (SFA), monounsaturated fatty acids (MUFA), and polyunsaturated fatty acids (PUFA) content of liver lipid in fish fed diets containing AMP was not influenced by choline content. The SFA and MUFA of liver lipid in fish fed the control diet was similar to other diets except for a decrease in PUFA. The linear relationship between lipid digestibility and plasma cholesterol was significant, otherwise most parameters were unaffected. When AMP is present, higher dietary choline reduced the severity of some hepatic lesions. This study demonstrated that choline-deficiency affects some plasma and liver histology parameters in juvenile YTK which might be useful fish health indicators. Importantly, this study elucidated potential reasons for lower growth in choline-deficient YTK and increased the knowledge on choline metabolism in the fish.
Language eng
DOI 10.1017/s0007114520003669
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
Copyright notice ©2020, The Authors
Persistent URL http://hdl.handle.net/10536/DRO/DU:30143299

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