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Testosterone nanoemulsion produced masculinized Nile tilapia (Oreochromis niloticus)

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Abstract

The objective of this work was to develop a food additive for the sex reversal of Nile tilapia (Oreochromis niloticus) based on a simple oil in water (O/W) nanoemulsion with testosterone propionate for incorporation into commercial feed. Oil screening and evaluation of the organoleptic and physicochemical characteristics were carried out to determine the best formulation. A palatability test was also performed. Sex reversal test was assayed using 5 experimental groups: negative control — macerated feed without hormone; free testosterone — macerated feed with 60 mg/kg of testosterone propionate diluted in ethanol; and macerated feed with testosterone propionate nanoemulsion at a concentration of 30, 60, and 90 mg/kg. Stable nanoemulsions (size 76–210 nm) with testosterone propionate were produced. All nanoemulsion-added feed was palatable to tilapia. We obtained sex reversal values of ≈65, 75, and 72% in the groups of 30, 60, and 90 mg/kg, respectively. We can conclude that the nanoemulsion showed promising results; it is capable of inducing sex reversal in tilapia, is suitable as a commercial product, and has the potential to promote safety for rural staff and reduce the environmental impact of hormones.

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Data Availability

The data and material used in this study are available from the corresponding author on request.

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Acknowledgements

The authors would like to thank the Universidade Federal de Pernambuco for the availability of Laboratórios Associados em Rede de Nanotecnologia (LARNano), and all the members involved in this research.

Funding

The authors would like to thank the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior — CAPES, for the scholarship to Amanda R. Santos-Magnabosco, Ester I. D. Quinova, and Jadson F. Silva; CNPq (National Council for Scientific and Technological Development) for the PIBITI scholarship for Matheus V. V. Melo and DT-2 productivity scholarship (Process 310401/2017–8) for Pabyton G. Cadena; and Universidade Federal Rural de Pernambuco (Call 015/2018) and Serviço Brasileiro de Apoio às Micro e Pequenas Empresas (SEBRAE) (Catalisa ICT No. 29083*198) for the financial support.

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Contributions

Details of each author with their contribution in this paper: Amanda Rodrigues dos Santos Magnabosco — conceptualization, methodology, validation, formal analysis, investigation, data curation, writing — original draft, writing — review and editing, and visualization; Ester Inácio Damião Quinova — investigation and data curation; Matheus Victor Viana de Melo — investigation and data curation; Paulo Eduardo da Silva Bastos — investigation; Thamiris Pinheiro Santos — investigation; Ivanildo Inácio da Silva Júnior — investigation; André Lucas Corrêa de Andrade — formal analysis and data curation; Renata Meireles Oliveira Padilha — investigation and writing — original draft; Jadson Freitas da Silva — investigation; Fabrício Bezerra de Sá — investigation; Marília Ribeiro Sales Cadena — supervision, project administration, writing — original draft, and writing — review and editing; and Pabyton Gonçalves Cadena — conceptualization, methodology, validation, formal analysis, resources, data curation, writing — original draft, writing — review and editing, visualization, supervision, project administration, and funding acquisition. All authors read and approved the final manuscript.

Corresponding author

Correspondence to Pabyton Gonçalves Cadena.

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Ethics approval

All protocols presented in this study were submitted and approved by the Ethics Committee on the Use of Animals of Universidade Federal Rural de Pernambuco — UFRPE, protocol number 117/2019.

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Conflict of interest

The research reported in this manuscript is part of a patent (BR102020004629-2) in the course of the process.

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dos Santos Magnabosco, A.R., Quinova, E.I.D., de Melo, M.V.V. et al. Testosterone nanoemulsion produced masculinized Nile tilapia (Oreochromis niloticus). Fish Physiol Biochem 48, 1449–1462 (2022). https://doi.org/10.1007/s10695-022-01156-3

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  • DOI: https://doi.org/10.1007/s10695-022-01156-3

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