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Low temperature stress in a cultured fish (Piaractus mesopotamicus) fed with Pyropia columbina red seaweed-supplemented diet

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Abstract

This study aimed to analyze the cold stress effects (in terms of hematology, energy reserves, and oxidative stress) in Piaractus mesopotamicus (pacú) and their mitigation by a Pyropia columbina red seaweed-supplemented diet. For this purpose, juvenile fish were fed with a control (CD) or a red seaweed-supplemented diet (RD) for 60 days, and then, the animals were exposed to a low temperature (14 °C) and a control temperature (24 °C) for 24 h. The cold shock generated an increase of hemoglobin levels in fish fed with both diets. In CD-fed fish, plasmatic triglycerides, cholesterol, and hepatic glycogen decreased after the thermal shock; meanwhile, the animals fed with RD showed decreased hepatic proteins, but increased cholesterol and hepatic glycogen. Regarding oxidative stress, antioxidant enzymes augmented their activity in the liver, intestine, and gills; meanwhile, lipid oxidative damage was observed in the liver and intestine of fish exposed to 14 °C and fed with both diets. Pacú was sensitive to cold shock, but no mitigation effects were observed in fish fed with the supplemented diet. Further research should target higher concentrations of P. columbina in supplemented diets to take advantage of this valuable resource.

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Acknowledgements

Authors are thankful to the Área de Cereales y Oleaginosas of the Instituto de Tecnología de Alimentos (FIQ-UNL) for providing the control and supplemented extruded feed.

Funding

This work was supported by grants from Agencia Nacional de Promoción Científica y Tecnológica (PICT-2016 1911), Consejo Nacional de Investigaciones Científicas y Técnicas (PIP- 112 201501 00942 CO), and Universidad Nacional del Litoral (CAI+D 2016-50420150100016LI).

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Authors

Contributions

AA: data curation, formal analysis, methodology, visualization, writing—original draft, writing—review and editing.

CB: conceptualization, data curation, formal analysis, funding acquisition, investigation, methodology, project administration, resources, supervision, validation, visualization, writing—original draft, writing—review and editing.

AR: data curation, formal analysis, funding acquisition, project administration, investigation, methodology, supervision, validation, visualization.

PS: data curation, formal analysis, methodology, visualization, writing—review and editing.

JC: conceptualization, funding acquisition, investigation, methodology, project administration, resources, supervision, validation, visualization, writing—review and editing.

Corresponding author

Correspondence to Carla Bacchetta.

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The authors declare no competing interest.

Ethics approval

All experiments were carried out following the national and institutional guidelines for the protection of animal welfare (CONICET 2005) and approved by the Committee of Ethics and Safety in Experimental Work (Scientific-Technological Center, CONICET Santa Fe, Argentina).

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Ale, A., Bacchetta, C., Rossi, A.S. et al. Low temperature stress in a cultured fish (Piaractus mesopotamicus) fed with Pyropia columbina red seaweed-supplemented diet. Fish Physiol Biochem 47, 829–839 (2021). https://doi.org/10.1007/s10695-021-00944-7

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  • DOI: https://doi.org/10.1007/s10695-021-00944-7

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