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Impacts of astaxanthin-enriched Paracoccus carotinifaciens on growth, immune responses, and reproduction performance of broodstock Nile tilapia during winter season

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Abstract

The growth, immune response, and reproductive performance of broodstock of Nile tilapia (Oreochromis niloticus) under winter stress conditions were investigated the effects of supplementary diets with astaxanthin-enriched Paracoccus carotinifaciens. Throughout an eight-week period in the winter season, male and female tilapia were fed with diets containing different levels of P. carotinifaciens dietary supplementation: 0 g/kg (T1; control), 5 g/kg (T2), 10 g/kg (T3), and 20 g/kg (T4). Subsequently, a four-week mating system was implemented during the winter stress period. The results revealed that there were no significant differences observed in growth, hematological indices, and blood chemical profiles among all treatment groups for both male and female tilapia. However, a significant increase in cholesterol content was noted in both male and female tilapia fed with the T4 diet (p<0.05). The total carotenoid content in the muscle was evaluated, and significantly higher values were found in both male and female tilapia that fed T4 supplementation (p<0.05). Moreover, immunological parameters such as myeloperoxidase and antioxidant parameters in the liver including superoxide dismutase activity and catalase enzyme activity showed significant increases in tilapia fed with the T4 diet. The impact of P. carotinifaciens supplementation on broodstock tilapia indicated a significant increase in spermatozoa concentration in males and increased egg production in females after consumption of the T4 diet (p<0.05). Thus, this study highlighted that the presence of astaxanthin-enriched P. carotinifaciens in the diet of broodstock Nile tilapia can lead to the accumulation of carotenoids in their muscle tissue, improvement in antioxidant status, enhancement of immune function, and potential enhancement of reproductive capabilities, even under overwintering conditions.

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All data generated or analyzed during this study are included in this published article.

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Acknowledgements

We gratefully thank Marine leader or.th, Thailand for kindly supplying the bacterium (Paracoccus carotinifaciens) used for this research. We extend special thanks to Ms. Wachirintra Sanseemon and Ms. Piyapohn Kanhaseeya for their kind assistance during the preparation of this research.

Funding

This research project was financially supported by Mahasarakham University (Grant no. 6601003/2566) and this research work was partially supported by Unit of Excellence Physiology and Sustainable Production of Terrestrial and Aquatic Animals (Fundamental Fund 2024), University of Phayao.

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N.S. was involved in conceptualization, methodology, formal analysis, investigation, resources, data curation, writing-original draft preparation, visualization, writing - review & editing, project administration, and funding acquisition. P.P. was involved in methodology, writing - review & editing, and funding acquisition. T.V. was involved in methodology, writing-original draft preparation, writing - review & editing. E.W. was involved in methodology, formal analysis, writing - review & editing.

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Correspondence to Nantaporn Sutthi.

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Institutional Animal Care and Use Committee, Mahasarakham University (IACUC-MSU), Thailand (IACUC-MSU-13/2021).

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The authors declare no competing interests.

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Panase, P., Vongkampang, T., Wangkahart, E. et al. Impacts of astaxanthin-enriched Paracoccus carotinifaciens on growth, immune responses, and reproduction performance of broodstock Nile tilapia during winter season. Fish Physiol Biochem (2024). https://doi.org/10.1007/s10695-024-01331-8

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