Lipid profile of parr and smolts of Atlantic salmon (Salmo salar L.) reared in aquaculture under various lighting regimes

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Abstract

The study of the biochemical mechanisms of the effect of additional lighting on the

growth and early development of salmonids in aquaculture allows to identify patterns of slow or accelerated growth, as well as the onset of the smoltification. In this study, the results of changes in lipid status in parr and smolts of Atlantic salmon after the “winter window” (December-January) are presented. These results were obtained from three experimental groups exposed to different lighting and feeding regimes at the fingerlings stage. The changes in lipid composition of the studied young salmon indicate the onset of smoltification in all experimental groups. However, this effect is the most pronounced in the fish previously reared under continuous lighting during the summer-autumn season.

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About the authors

D. S. Provorotov

Institute of Biology of the Karelian Research Centre of the Russian Academy of Sciences (IB KarRC RAS)

Author for correspondence.
Email: klaydim1@mail.ru
Russian Federation, 11 Pushkinskaya Street, Petrozavodsk, Karelia, 185910

S. A. Murzina

Institute of Biology of the Karelian Research Centre of the Russian Academy of Sciences (IB KarRC RAS)

Email: klaydim1@mail.ru
Russian Federation, 11 Pushkinskaya Street, Petrozavodsk, Karelia, 185910

V. P. Voronin

Institute of Biology of the Karelian Research Centre of the Russian Academy of Sciences (IB KarRC RAS)

Email: klaydim1@mail.ru
Russian Federation, 11 Pushkinskaya Street, Petrozavodsk, Karelia, 185910

D. I. Manoylova

Institute of Biology of the Karelian Research Centre of the Russian Academy of Sciences (IB KarRC RAS)

Email: klaydim1@mail.ru
Russian Federation, 11 Pushkinskaya Street, Petrozavodsk, Karelia, 185910

M. V. Kuznetsova

Institute of Biology of the Karelian Research Centre of the Russian Academy of Sciences (IB KarRC RAS)

Email: klaydim1@mail.ru
Russian Federation, 11 Pushkinskaya Street, Petrozavodsk, Karelia, 185910

A. E. Kuritsyn

Institute of Biology of the Karelian Research Centre of the Russian Academy of Sciences (IB KarRC RAS)

Email: klaydim1@mail.ru
Russian Federation, 11 Pushkinskaya Street, Petrozavodsk, Karelia, 185910

N. N. Nemova

Institute of Biology of the Karelian Research Centre of the Russian Academy of Sciences (IB KarRC RAS)

Email: klaydim1@mail.ru
Russian Federation, 11 Pushkinskaya Street, Petrozavodsk, Karelia, 185910

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Supplementary files

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2. Fig. 1. General experimental design

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3. Fig. 2. Photographs of juvenile salmon in the experiment: a – group 24LD + KK; b – group EstLD + KD; c – group 24LD + KD

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4. Fig. 3. Dynamics of lipid classes (% dry matter) in the muscles of juvenile Atlantic salmon in the three experimental treatments studied in March. The following abbreviations for the studied lipid classes are used in the figure: PL - total phospholipids, TAG - triacylglycerols, DAG - diacylglycerols, MAG - monoacylglycerols, CS - cholesterol, ECS - cholesteryl esters, FFA - free fatty acids

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5. Fig. 4. Dynamics of some phospholipid classes (% dry matter) in the muscles of juvenile Atlantic salmon in the three experimental variants studied in March. The following abbreviations for the studied phospholipid classes are used in the figure: PI - phosphatidylinositol, FS - phosphatidylserine, PEA - phosphatidylethanolamine, PC - phosphatidylcholine, LPC - lysophosphatidylcholine, SFM - sphingomyelin

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6. Fig. Fig. 5. Dynamics of lipid classes (% dry matter) in the liver of juvenile Atlantic salmon in the three experimental treatments studied in March

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7. Fig. 6. Dynamics of some phospholipid classes (% dry matter) in the liver of juvenile Atlantic salmon in three experimental variants studied in March

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