<abstract xmlns="http://www.w3.org/1999/xhtml"><p>The goal of the current study was to characterize developmental-induced changes of the metabolic and antioxidant responses in the skeletal muscles of the anadromous sea trout (<italic>Salmo trutta</italic> L.) from the Baltic Sea and its catchment area rivers. Activities of the metabolic enzymes, i.e., lactate dehydrogenase, succinate dehydrogenase, alanine and aspartate aminotransferases, their ratios representing aerobic, anaerobic, and amino acid metabolisms, the level of the metabolites (pyruvate and lactate), the activities of several key antioxidant enzymes (superoxide dismutase, catalase, glutathione peroxidase, and reductase), and a marker of lipid peroxidation (2-Thiobarbituric acid reactive substances, TBARS) were evaluated. The current study revealed the impact of the sex and different developmental stages of the sea trout (parr, smolts, spawners, adults, and kelts) on the effective formation of adaptive oxygen-dependent mechanisms. A stable developmental-related tendency toward increased lipid peroxidation in muscle tissues was observed. Glutathione peroxidase in muscle tissues played a leading role in the different stages of trout development. A switch of the muscle cytosolic redox potential from the aerobic pathway to anaerobic glycolysis was observed. These results indicated that energy-related cellular components and metabolic enzymes could compensate for adaptive mechanisms without any serious damage to muscle tissues. The differences in the enzyme activities were associated with the reorganization of the energy-related metabolic pathways (anaerobic and aerobic pathways) during spawning. This process was one of the adaptation mechanisms of this fish.</p></abstract>

The goal of the current study was to characterize developmental-induced changes of the metabolic and antioxidant responses in the skeletal muscles of the anadromous sea trout (Salmo trutta L.) from the Baltic Sea and its catchment area rivers. Activities of the metabolic enzymes, i.e., lactate dehydrogenase, succinate dehydrogenase, alanine and aspartate aminotransferases, their ratios representing aerobic, anaerobic, and amino acid metabolisms, the level of the metabolites (pyruvate and lactate), the activities of several key antioxidant enzymes (superoxide dismutase, catalase, glutathione peroxidase, and reductase), and a marker of lipid peroxidation (2-Thiobarbituric acid reactive substances, TBARS) were evaluated. The current study revealed the impact of the sex and different developmental stages of the sea trout (parr, smolts, spawners, adults, and kelts) on the effective formation of adaptive oxygen-dependent mechanisms. A stable developmental-related tendency toward increased lipid peroxidation in muscle tissues was observed. Glutathione peroxidase in muscle tissues played a leading role in the different stages of trout development. A switch of the muscle cytosolic redox potential from the aerobic pathway to anaerobic glycolysis was observed. These results indicated that energy-related cellular components and metabolic enzymes could compensate for adaptive mechanisms without any serious damage to muscle tissues. The differences in the enzyme activities were associated with the reorganization of the energy-related metabolic pathways (anaerobic and aerobic pathways) during spawning. This process was one of the adaptation mechanisms of this fish.

Developmental-induced changes of metabolic and antioxidant responses in the skeletal muscles of sea trout (<italic>Salmo trutta</italic> L.)

Department of Zoology and Animal Physiology

Fisheries & Aquatic Life

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Developmental-induced changes of metabolic and antioxidant responses in the skeletal muscles of sea trout ( L.)

The goal of the current study was to characterize developmental-induced changes of the metabolic and antioxidant responses in the skeletal muscles of the...

Developmental-induced changes of metabolic and antioxidant responses in the skeletal muscles of sea trout (Salmo trutta L.)

Published Online: Jul 27, 2020

Page range: 77 - 90

Received: Nov 26, 2019

Accepted: May 26, 2020

DOI: https://doi.org/10.2478/aopf-2020-0011

Keywords
metabolic alteration, antioxidant defense, developmental changes, sea trout, Baltic Sea

© 2020 Natalia Kurhaluk et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Developmental-induced changes of metabolic and antioxidant responses in the skeletal muscles of sea trout (Salmo trutta L.)

Published Online: Jul 27, 2020

Page range: 77 - 90

Received: Nov 26, 2019

Accepted: May 26, 2020

DOI: https://doi.org/10.2478/aopf-2020-0011

Keywordsmetabolic alteration, antioxidant defense, developmental changes, sea trout, Baltic Sea

© 2020 Natalia Kurhaluk et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Keywords
metabolic alteration, antioxidant defense, developmental changes, sea trout, Baltic Sea