<abstract xmlns="http://www.w3.org/1999/xhtml">

<p>The present study evaluated the health status of rainbow trout (30.24±5.34 g) acclimated to high-saline water (28‰). Among adaptation procedures, gradually-acclimated (for 48 h) fish showed best performance, which were then introduced to the offshore cage-farm for further monitoring of fish health in marine environment over a long-term period of 100 days, until harvest weight of 319.9±48.51 g. Fish health and welfare was evaluated by means of biochemical parameters (viscerasomatic index, hepatosomatic index, mesenteric fat index, and spleen somatic index), hematological parameters (serum glucose, triglyceride, cholesterol, total protein, albumin, globulin), and immune parameters (lysozyme, myeloperoxidase, respiratory burst and potential killing values). Gradual acclimation to high-saline water did not show any adverse effects on health parameters. No significant differences were found in biometric measures (P>0.05). However, a time-dependent increase was recorded in hematology markers (P&lt;0.05) after seawater transfer, and the health status improved over long term from March 7 to June 14, 2018. All serum biochemical markers, except the total protein showed significant alterations (P&lt;0.05) in long term but without detrimental influence by day 100. Therefore, it seems possible to expand trout farms from brackish water sites to higher saline environments up to 28‰ salinity, with no detrimental impacts on fish health, that in turn may significantly contribute to the extension of potential aquaculture sites to wider areas.</p>
</abstract>

The present study evaluated the health status of rainbow trout (30.24±5.34 g) acclimated to high-saline water (28‰). Among adaptation procedures, gradually-acclimated (for 48 h) fish showed best performance, which were then introduced to the offshore cage-farm for further monitoring of fish health in marine environment over a long-term period of 100 days, until harvest weight of 319.9±48.51 g. Fish health and welfare was evaluated by means of biochemical parameters (viscerasomatic index, hepatosomatic index, mesenteric fat index, and spleen somatic index), hematological parameters (serum glucose, triglyceride, cholesterol, total protein, albumin, globulin), and immune parameters (lysozyme, myeloperoxidase, respiratory burst and potential killing values). Gradual acclimation to high-saline water did not show any adverse effects on health parameters. No significant differences were found in biometric measures (P>0.05). However, a time-dependent increase was recorded in hematology markers (P<0.05) after seawater transfer, and the health status improved over long term from March 7 to June 14, 2018. All serum biochemical markers, except the total protein showed significant alterations (P<0.05) in long term but without detrimental influence by day 100. Therefore, it seems possible to expand trout farms from brackish water sites to higher saline environments up to 28‰ salinity, with no detrimental impacts on fish health, that in turn may significantly contribute to the extension of potential aquaculture sites to wider areas.

Temporal Variations in Hematological, Immunological and Serum Biochemical Parameters of Rainbow Trout (<italic>Oncorhynchus mykiss</italic>) Acclimated to High-Saline Water in the Northern Aegean Sea

Department of Marine Sciences, Faculty of Marine Science and Technology

Department of Animal Nutrition and Nutritional Diseases, Faculty of Veterinary Medicine

Department of Marine Technology Engineering, Faculty of Marine Science and Technology

Department of Aquaculture, Faculty of Marine Science and Technology

Annals of Animal Science

This work is licensed under the Creative Commons Attribution 4.0 International License.

Temporal Variations in Hematological, Immunological and Serum Biochemical Parameters of Rainbow Trout () Acclimated to High-Saline Water in the Northern Aegean Sea

The present study evaluated the health status of rainbow trout (30.24±5.34 g) acclimated to high-saline water (28‰). Among adaptation procedures,...

Temporal Variations in Hematological, Immunological and Serum Biochemical Parameters of Rainbow Trout (Oncorhynchus mykiss) Acclimated to High-Saline Water in the Northern Aegean Sea

Published Online: Jan 27, 2023

Page range: 97 - 106

Received: Feb 03, 2022

Accepted: Jun 07, 2022

DOI: https://doi.org/10.2478/aoas-2022-0047

Keywords
rainbow trout, biochemical parameters, hematological profile, health status, high saline water

© 2022 Yesim Buyukates et al., published by Sciendo

This work is licensed under the Creative Commons Attribution 4.0 International License.

Temporal Variations in Hematological, Immunological and Serum Biochemical Parameters of Rainbow Trout (Oncorhynchus mykiss) Acclimated to High-Saline Water in the Northern Aegean Sea

Published Online: Jan 27, 2023

Page range: 97 - 106

Received: Feb 03, 2022

Accepted: Jun 07, 2022

DOI: https://doi.org/10.2478/aoas-2022-0047

Keywordsrainbow trout, biochemical parameters, hematological profile, health status, high saline water

© 2022 Yesim Buyukates et al., published by Sciendo

This work is licensed under the Creative Commons Attribution 4.0 International License.

Keywords
rainbow trout, biochemical parameters, hematological profile, health status, high saline water