Russian sturgeon cultured in a subtropical climate shows weaken innate defences and a chronic stress response

Dublin Core

Title

Russian sturgeon cultured in a subtropical climate shows weaken innate defences and a chronic stress response

Subject

INMUNOLOGIA
PECES
MARISCOS
BIBLIOGRAFIA NACIONAL QUIMICA
2017

Abstract

Russian sturgeon (Acipenser gueldenstaedtii) has been successfully farmed in Uruguay for the past ten years. However, during the Uruguayan summer fish endure high water temperatures and increased bacterial infections that threaten aquaculture. Our understanding of sturgeon's immune system and its interplay with environmental factors like temperature is almost unknown. This study analysed the way in which seasonal variations affect enzymatic blood components of Russian sturgeon's innate defences, including the serum alternative complement pathway (ACP), ceruloplasmin (Cp) and lysozyme activities. Results showed that summertime conditions in the farm altered these defences in different ways, inducing a significant decrease in ACP and Cp, and an increase in lysozyme. In addition, serum levels of total protein and cortisol decreased in summer, suggesting a chronic stress response was induced in parallel. Subsequently, we analysed whether the increase in water river temperature during summer could account for the observed results. To that end, we acclimated juvenile sturgeons to mild (18 °C) or warm (24 °C) temperatures for 37 days. Like in summer, sturgeons exposed to 24 °C showed lower levels of serum ACP, Cp and total proteins, together with a progressive decrease in body weight and increased fish mortality. Administration of an immunostimulant containing Se and Zn slightly reverted the temperature-induced effects on sturgeon's defences. Altogether, our study provides novel data on various physiological parameters of the Russian sturgeon and highlights the impact warm temperature has on stress and innate immunity in this chondrostean fish.

Creator

Castellano, Mauricio.
Silva-Alvarez, Valeria
Fernández López, Elena
Mauris, Verónica
Conijeski, Daniel
Villarino, Andrea
Ferreira, Ana M.

Source

Fish & Shellfish Immunology v. 68, 2017. -- p. 443-451

Publisher

Elsevier

Date

2017

Rights

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Format

PDF

Language

Inglès

Type

Artículo

Identifier

DOI: 10.1016/j.fsi.2017.07.048

Document Item Type Metadata

Original Format

PDF
Date Added
January 15, 2018
Collection
Bibliografía Nacional Química
Item Type
Document
Tags
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Citation
Castellano, Mauricio. et al., “Russian sturgeon cultured in a subtropical climate shows weaken innate defences and a chronic stress response,” RIQUIM - Repositorio Institucional de la Facultad de Química - UdelaR, accessed November 17, 2025, https://riquim.fq.edu.uy/items/show/4826.