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Mitigation of cold stress in Nile tilapia (Oreochromis niloticus) through dietary lipids supplementation: a preliminary network meta-analysis

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Abstract

There is a growing body of evidence suggesting that water temperature can significantly impact the dietary fatty acid requirements of Nile tilapia (Oreochromis niloticus). Therefore, this study assessed the effectiveness of different dietary lipid sources on the growth performance of Nile tilapia reared at suboptimal temperatures. A network meta-analysis was performed, including searches of PubMed and Scopus from inception to January 2022, for trials that evaluated the effects of lipid sources on cold-stressed Nile tilapia. The Bayesian hierarchical framework was used to pool and compare the effect sizes of growth parameters such as weight gain, feed intake, and feed conversion ratio (FCR). Furthermore, the surface under the cumulative ranking curve (SUCRA) was obtained to calculate the probability that each lipid source was the most effective against cold stress. All subsequent numbers refer to comparisons with diets containing only fish oil. Dietary Aurantiochytrium significantly increased weight gain (SMD = 2.00, CrI: 0.70 to 3.40). In contrast, diets containing coconut oil led to significantly lower weight gain (SMD = − 3.30, CrI: − 6.00 to − 0.63) and higher FCR (SMD = 17.0, CrI: 6.70 to 27.0). Additionally, dietary corn oil was associated with a decrease in feed intake (SMD = − 2.32, CrI: − 3.91 to − 0.80), while a combination of fish and corn oil reduced FCR (SMD = − 5.70, CrI: − 11.0 to − 0.81). In general, the analysis of SUCRA values revealed that in cold-stressed Nile tilapia, Aurantiochytrium, sunflower oil, and the combination of fish and corn oil were the most effective lipid sources for improving growth at suboptimal temperatures. The results of the current study can serve as a basis for future studies that focus on the use of dietary lipid sources to mitigate cold stress in Nile tilapia.

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All data generated or analyzed during this study are included in this published article and its supplementary information files.

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Contributions

Quenum Crespin Luc and Chris Major Ncho contributed equally to the conceptualization, methodology, formal analysis, and initial draft preparation. Souleima Dhahbi contributed to the resources, literature review, and data validation and edited the first draft. Olumide Samuel Olowe contributed to the literature review, data validation, writing, and editing of the first draft. All authors read and approved the final manuscript.

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Correspondence to Olumide Samuel Olowe.

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Ethical approval

No ethical approval was required as this meta-analysis does not require animal use. Therefore, this study does not have an ethics committee registration number because data from previously published articles were used to build the database and obtain results.

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The authors declare no competing interests.

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Luc, Q.C., Ncho, C.M., Dhahbi, S. et al. Mitigation of cold stress in Nile tilapia (Oreochromis niloticus) through dietary lipids supplementation: a preliminary network meta-analysis. Fish Physiol Biochem 50, 209–223 (2024). https://doi.org/10.1007/s10695-023-01217-1

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