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August 12, 2026Journal of Fish BiologyOpen Access

Integrated multitissue analysis reveals distinct oxidative stress responses during recovery from cold shock in the Amazonian fish Colossoma macropomum

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Authors

NMNaiara MeloIKIsaac KonigSSStefânia P. de Souza

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Overview

Randomized trial evaluated oxidative stress responses in Amazonian fish, indicating tissue-specific recovery dynamics.

Key Points

  • This study aims to investigate how cold shock affects oxidative stress and recovery in the Amazonian fish Colossoma macropomum.
  • Juvenile tambaqui were exposed to cold shock at 20°C for 24 h, followed by recovery at 28°C.
  • Biomarker analysis included antioxidant enzyme activity and oxidative damage indicators across different tissues at baseline, 1, 24, and 48 h post-recovery.
  • Tissue-specific responses were evaluated using Integrated Biomarker Response version 2 (IBRv2).
  • The liver showed significant modulation of antioxidant enzymes, indicating high sensitivity to oxidative stress.
  • Gills exhibited the earliest response and integrated disturbance in oxidative stress biomarkers.
  • The brain demonstrated a tendency towards restoring redox homeostasis, while muscle and intestine showed ongoing oxidative demands during recovery.

Cite This Study

Melo et al. (2026) studied this question.

synapsesocial.com/papers/6a7c20ae06a85aed514b7b36https://doi.org/10.1111/jfb.70604
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Also Consider

Synapse has enriched 3 closely related papers on similar clinical questions. Consider them for comparative context:

  1. 1The role of the brain in farmed fish2012 · 43 citations
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  3. 3South American fish for continental aquaculture2016 · 333 citations