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Heavy metal levels in gonad and liver tissues-effects on the reproductive parameters of natural populations of Aphanius facsiatus.

Authors
  • Annabi, Ali
  • Said, Khaled
  • Messaoudi, Imed
Type
Published Article
Journal
Environmental Science and Pollution Research
Publisher
Springer Nature
Publication Date
Oct 01, 2013
Volume
20
Issue
10
Pages
7309–7319
Identifiers
DOI: 10.1007/s11356-013-1745-3
PMID: 23645000
Source
Medline
License
Unknown

Abstract

The impact of heavy metal levels (Cd, Cu, and Zn) on the reproductive parameters in natural populations of the Mediterranean killifish Aphanius fasciatus was monitored in four sites of the Tunisian coast. Our study covered a period of the reproductive cycle, from April to November 2009. The significantly higher levels of Cd, Cu, and Zn in the liver and gonads for both sexes (p<0.05) were observed in the most polluted site (Sfax coast). During the reproductive cycle of A. fasciatus, an unbalanced sex ratio in favor to females was observed for all the studied populations. The progression of the hepato- (HSI), gonadosomatic (GSI), and K-factor revealed a spatio-temporal variation between populations during the sampling period. Estradiol-17β amounts in the gonad tissues of females captured from the studied sites showed a significant difference, and the highest concentrations were noticed in the control site (Luza). Taking together, our data provide the first evidence of a physiologically stress and a disturbance of the reproductive status in natural populations of A. fasciatus.

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