Effect of estradiol-17β on the sex ratio, growth and survival of juvenile common snook (Centropomus undecimalis)

Acta Scientiarum: Animal Sciences

Wanessa de Melo Costa¹  Beatriz Nunes Vieira²  Cristina Vaz Avelar de Carvalho²  Vinicius Ronzani Cerqueira²  Gabriel Passini² 

[1] Fundação Instituto de Pesca do Estado do Rio de Janeiro;Universidade Federal de Santa Catarina;

关键词: sex control;    hormone treatment;    marine fish;    intersex;    protandric;   

DOI  :  10.4025/actascianimsci.v36i3.22839

来源: DOAJ

【 摘 要 】

Sex control in fish is a promising technique for aquaculture, since it gives advantages associated with one sex. The aim of this study was to investigate the feminization of common snook (Centropomus undecimalis) by oral administration of two doses of estradiol-17β (50 and 100 mg E2 kg-1 feed) and control treatment for 45 days and to evaluate their effects on the sex ratio, growth and survival of common snook juveniles. After this period, fish were fed only with commercial feed without hormone supplementation. During the period of E2 administration, the control fish grew more than those in the other treatments. At the end of the experiment in the treatment with 50 mg E2 kg-1, 26.32% of the fish were male, 68.42% were female, and 5.26% were intersex. In the treatment with 100 mg E2 kg-1, 10% of the fish were male, and 90% were female. There was no difference in growth among the treatments after 11 months. This study showed that it is possible to obtain 90% common snook females using feeds with 100 mg E2 kg-1 for 45 days without impairing the fish growth or survival.

【 授权许可】

Unknown