Recovery of the reproductive capability following exposure to 4-tert-octylphenol in the Neotropical cichlid fish Cichlasoma dimerus

G. REY VáZQUEZ; F. J. MEIJIDE; F. L. LO NOSTRO

BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY

SPRINGER

Lugar: Berlin; Año: 2016 vol. 96 p. 585 - 590

0007-4861

Este trabajo se encuentra en prensa.In this study, we analyzed the recovery of the reproductive capability in male Cichlasoma dimerus after exposure tosublethal concentrations of 4-tert-octylphenol(OP), a demonstrated estrogenic chemical. Adult fish were exposed to 0, 30, 150and 300 ìg/L OP during 60 days and subsequently transferred to OP-free waterfor another 60 days. At 150 and 300 ìg/L, absence of fertilized spawnings wererecorded during the first four weeks following OP exposure, which could beexplained by the impairment of testis architecture recorded at the highest OP concentrations.The restoration of the testicular organization began by day 14 in OP-free water,when the germinal epithelium re-started to proliferate from the scarcespermatogonia and Sertoli cells that remained after treatment. Testicularfunctionality was recovered by day 28, yielding fertilized eggs and viable F1 embryos.These results show that pathological features induced in the testes of C.dimerus by OP exposure are not permanent since fish recover their fertilization capacity after an adequate depuration period.