Physiological Response of Atlantic Salmon (Salmo salar) to Long-Term Exposure to an Anesthetic Obtained from Heterosigma akashiwo

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Autori principali: Gonçalves, Ana Teresa, Llanos-Rivera, Alejandra, Ruano, Miguel, Avello, Veronica, Gallardo-Rodriguez, Juan José, Astuya-Villalón, Allisson
Natura: Recurso digital
Pubblicazione: Zenodo 2022
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author Gonçalves, Ana Teresa
Llanos-Rivera, Alejandra
Ruano, Miguel
Avello, Veronica
Gallardo-Rodriguez, Juan José
Astuya-Villalón, Allisson
author_facet Gonçalves, Ana Teresa
Llanos-Rivera, Alejandra
Ruano, Miguel
Avello, Veronica
Gallardo-Rodriguez, Juan José
Astuya-Villalón, Allisson
contents <p>Despite the invaluable role of anesthetics as a tool for ensuring animal welfare in stressful situations, there is currently a lack of anesthetic drugs that meet the requirements of intensive aquaculture. In response to the growing interest in anesthetic substances of natural origin, this study evaluated the physiological and health impact of an anesthetic based on an extract of the microalga <span>Heterosigma akashiwo</span> on juvenile salmon (<span>Salmo salar</span>) exposed for a period of 72 h. To simulate a condition closer to reality where fish are subjected to stimuli (e.g., transport), the animals were exposed to 50 mg L<sup>−1</sup> of algal extract and to physical stress. Functional, physiological, and histological parameters were evaluated in blood and tissues at different sampling periods (0, 24, and 72 h). There was no mortality and the induction and recovery times observed were within the established criteria for anesthetic efficacy. The anesthetic extract did not induce any side effects, such as stress or metabolic damage, indicating that this extract is a viable option for supporting fish welfare during deleterious events. This study provides information to support that the anesthetic extract tested, derived from <span>H. akashiwo</span>, is a promising candidate drug for operations requiring sedation (e.g., Salmonid transport).</p>
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id zenodo_https___doi_org_10_3390_toxins14080575
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publishDate 2022
publisher Zenodo
record_format zenodo
spellingShingle Physiological Response of Atlantic Salmon (Salmo salar) to Long-Term Exposure to an Anesthetic Obtained from Heterosigma akashiwo
Gonçalves, Ana Teresa
Llanos-Rivera, Alejandra
Ruano, Miguel
Avello, Veronica
Gallardo-Rodriguez, Juan José
Astuya-Villalón, Allisson
Atlantic salmon
Salmo salar
anaesthesia
<p>Despite the invaluable role of anesthetics as a tool for ensuring animal welfare in stressful situations, there is currently a lack of anesthetic drugs that meet the requirements of intensive aquaculture. In response to the growing interest in anesthetic substances of natural origin, this study evaluated the physiological and health impact of an anesthetic based on an extract of the microalga <span>Heterosigma akashiwo</span> on juvenile salmon (<span>Salmo salar</span>) exposed for a period of 72 h. To simulate a condition closer to reality where fish are subjected to stimuli (e.g., transport), the animals were exposed to 50 mg L<sup>−1</sup> of algal extract and to physical stress. Functional, physiological, and histological parameters were evaluated in blood and tissues at different sampling periods (0, 24, and 72 h). There was no mortality and the induction and recovery times observed were within the established criteria for anesthetic efficacy. The anesthetic extract did not induce any side effects, such as stress or metabolic damage, indicating that this extract is a viable option for supporting fish welfare during deleterious events. This study provides information to support that the anesthetic extract tested, derived from <span>H. akashiwo</span>, is a promising candidate drug for operations requiring sedation (e.g., Salmonid transport).</p>
title Physiological Response of Atlantic Salmon (Salmo salar) to Long-Term Exposure to an Anesthetic Obtained from Heterosigma akashiwo
topic Atlantic salmon
Salmo salar
anaesthesia
url https://doi.org/10.3390/toxins14080575