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Impact of artificial light at night (ALAN) on cardiac function and acute oxidative stress physiology in migratory brown trout smolts

Identification

Clé publique

radar:r-cbf3809382b28129f0294e94c5a3add4

Auteurs

Sophia Schumann · Velizara Stoilova · Enrico Bortoletto · Elisabetta Piva · Sara Pacchini · Gloria Mozzi · Andreas Jechow · Andrea Marion · Daniela Bertotto · Ann Erlandsson · Franz Hölker · LARRY A. GREENBERG · Gianfranco Santovito

Année déclarée

2025

Langue déclarée

en

Type source

article

Première détection

2026-11-14T02:03:33.895200+00:00

Dernière observation des métadonnées

2026-11-14T02:03:33.895200+00:00

Dernière vérification HTTP

Non effectuée

Institutions déclarées par la source

University of Padua · Karlstad University · Ca' Foscari University of Venice · CMCC Foundation - Euro-Mediterranean Center on Climate Change · Brandenburg University of Applied Sciences · Leibniz Institute of Freshwater Ecology and Inland Fisheries

Pays d’affiliation déclarés

DE · IT · SE

Résumé documentaire — langue originale

Light pollution poses significant ecological challenges for nocturnal animals reliant on natural light for migration, orientation, and circadian rhythms. The physiological effects of abrupt exposure to artificial light at night (ALAN) on migratory fish, such as the light experienced passing near illuminated infrastructures, remain poorly understood. This study investigates the physiological responses of brown trout (Salmo trutta) smolts to low-intensity (0.02 lx) and short-term (30 s) ALAN, simulating nocturnal migration light conditions near illuminated bridges. To evaluate the influence of social dynamics, trout were tested individually (solitary) or in groups of six. Using continuous cardiac monitoring with data storage tags, alongside analyses of oxidative stress markers and adenylate kinase (AK) activity in the heart, we identified distinct patterns of physiological responses. Solitary fish exhibited significant heart rate variability (HRV) increases following repeated ALAN exposure, suggesting impaired physiological regulation under repeated ALAN exposure. In contrast, trout in groups displayed consistently lower HRV over the entire 90-min experiment, implying that social dynamics likely influenced a sustained oxidative stress response, corroborated by increased AK activity. Oxidative stress markers further reflected social effects, with significant upregulation of key antioxidant enzymes (sod1, sod2, gpx1, gpx4) and elevated lipid peroxidation, identifying lipids as primary oxidative targets. The observed divergence between superoxide dismutase (SOD) activity and sod gene expression suggests adaptive post-transcriptional regulation to maintain redox balance under combined environmental and social stress. These findings reveal that social dynamics under ALAN can amplify physiological stress, potentially affecting migratory outcomes.

Identifiants

OPENALEX

https://openalex.org/W4410980287

DOI

10.1016/j.envpol.2025.126593

PMID

https://pubmed.ncbi.nlm.nih.gov/40472876

Repères documentaires

Famille documentaire

article

Types déclarés par les sources

article

Éditeurs

Elsevier BV

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Sources

OpenAlex · Document 1

• Document · https://doi.org/10.1016/j.envpol.2025.126593

Statut documentaire

Pertinence à examiner

Bibliothèque

Cette identité n’est pas encore intégrée à la Bibliothèque juridique.