Changes in thiamine concentrations, fatty acid composition, and some other lipid-related biochemical indices in Baltic Sea Atlantic salmon (Salmo salar) during the spawning run and pre-spawning fasting

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Vuorinen , P J , Rokka , M , Ritvanen , T , Käkelä , R , Nikonen , S , Pakarinen , T & Keinänen , M 2020 , ' Changes in thiamine concentrations, fatty acid composition, and some other lipid-related biochemical indices in Baltic Sea Atlantic salmon (Salmo salar) during the spawning run and pre-spawning fasting ' , Helgoland Marine Research , vol. 74 , no. 10 . https://doi.org/10.1186/s10152-020-00542-9

Title: Changes in thiamine concentrations, fatty acid composition, and some other lipid-related biochemical indices in Baltic Sea Atlantic salmon (Salmo salar) during the spawning run and pre-spawning fasting
Author: Vuorinen, Pekka J.; Rokka, Mervi; Ritvanen, Tiina; Käkelä, Reijo; Nikonen, Soili; Pakarinen, Tapani; Keinänen, Marja
Other contributor: University of Helsinki, Molecular and Integrative Biosciences Research Programme
University of Helsinki, Molecular and Integrative Biosciences Research Programme



Date: 2020-08-28
Language: eng
Number of pages: 24
Belongs to series: Helgoland Marine Research
ISSN: 1438-3888
DOI: https://doi.org/10.1186/s10152-020-00542-9
URI: http://hdl.handle.net/10138/319168
Abstract: Salmonines in the Baltic Sea and North American lakes suffer from thiamine (vitamin B1) deficiency, which is connected to an abundant lipid-rich diet containing substantial amounts of polyunsaturated fatty acids (PUFAs). In the Baltic region, this is known as the M74 syndrome. It affects both adult salmon (Salmo salar) and especially their offspring, impairing recruitment. However, very little is known about the thiamine and lipid metabolism of salmon during feeding and spawning migrations in the Baltic Sea. In this study, salmon females were sampled along the spawning run from the southern Baltic Proper in four locations at sea and finally at spawning in a river at the Bothnian Bay in a year with insignificant M74 mortality. Changes in concentrations of thiamine and its components in muscle, ovaries, and the liver and other biochemical indices potentially relating to lipid and fatty acid metabolism were investigated. The results provide further evidence of the role of peroxidation of PUFAs in eliciting thiamine deficiency in salmon: During the entire spawning run, the muscle total lipid content decreased by 50%, palmitic acid (16:0) by 62%, and docosahexaenoic acid (DHA, 22:6n-3) by 45%. The concentration of total thiamine decreased significantly until the spawning in the liver and ovaries, 66 and 70% respectively. In the muscle, the proportion of thiamine pyrophosphate of total thiamine increased with the use of muscular lipid stores. There was no trend in the concentration of total carotenoids during the spawning run. The doubling of the concentration of hepatic malondialdehyde indicated peroxidation of PUFAs, and the mobilisation of body lipids suppressed the activity of glucose-6-phosphate dehydrogenase, as consumed dietary lipids would also have done.
Subject: 1181 Ecology, evolutionary biology
Atlantic salmonSalmo salar
Carotenoids
Fatty acids
G6PDH
Lipid peroxidation
MDA
M74 syndrome
PUFA
Thiamine deficiency
YOLK-SAC MORTALITY
CLUPEA-HARENGUS L.
COD GADUS-MORHUA
M74 SYNDROME
OXIDATIVE STRESS
RAINBOW-TROUT
LAKE TROUT
REPRODUCTIVE DISORDER
FISH
DEFICIENCY
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