Comparative ploidy response to experimental hydrogen peroxide exposure in Atlantic salmon (Salmo salar)

Fish & Shellfish Immunology
Lynn ChalmersHerve Migaud

Abstract

While research into the growth, survival, nutrition and, more recently, disease susceptibility of triploid Atlantic salmon has expanded, there remains an overall lack of studies assessing the response of triploids to chemical treatments. It is essential that the response of triploids to disease treatments be characterised to validate their suitability for commercial production. This study aimed to investigate and compare the stress and immune responses of triploid and diploid Atlantic salmon following an experimental treatment with hydrogen peroxide (H2O2). A dose response test was first undertaken to determine a suitable test dose for both diploid and triploid Atlantic salmon. Following this, diploids and triploids were exposed to H2O2 (1800 ppm) for 20 min, as per commercial practices, after which blood glucose and lactate, and plasma cortisol and lysozyme were measured, along with the expression of oxidative stress and immune-related genes. In the first 6 h post-exposure to H2O2, comparable mortalities occurred in both diploid and triploid Atlantic salmon. Cortisol, glucose and lactate were not significantly influenced by ploidy suggesting that, physiologically, triploid Atlantic salmon are able to cope with the stress assoc...Continue Reading

Citations

Jun 22, 2020·Parasite Immunology·Mar Marcos-López, Hamish D Rodger
Jun 28, 2019·Frontiers in Endocrinology·Francisco Javier Sánchez-VázquezJesús M Míguez
Aug 27, 2021·Diseases of Aquatic Organisms·Heidi MathiessenKurt Buchmann

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Methods Mentioned

BETA
chemical treatments
Assay
ELISA
electrophoresis
PCR

Software Mentioned

Gen5 Data Analysis
RefFinder
Image
Gen5
PRIMER3
Pro Premier

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