| Autor: |
dos Santos Magnabosco, Amanda Rodrigues, Quinova, Ester Inácio Damião, de Melo, Matheus Victor Viana, da Silva Bastos, Paulo Eduardo, Santos, Thamiris Pinheiro, da Silva Júnior, Ivanildo Inácio, de Andrade, André Lucas Corrêa, Padilha, Renata Meireles Oliveira, da Silva, Jadson Freitas, de Sá, Fabrício Bezerra, Cadena, Marília Ribeiro Sales, Cadena, Pabyton Gonçalves |
| Zdroj: |
Fish Physiology & Biochemistry; Dec2022, Vol. 48 Issue 6, p1449-1462, 14p |
| Abstrakt: |
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. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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