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Effects of TBT on the imposex development, reproduction and mortality in Hexaplex trunculus (Gastropoda: Muricidae)

Published online by Cambridge University Press:  20 February 2009

Sami Abidli ,
Youssef Lahbib  and
Najoua Trigui El Menif
Sami Abidli
Affiliation:
Laboratory of Environment Bio-monitoring (LBE), Department of Biology, University of 7th November at Carthage, Faculty of Sciences of Bizerte, 7021 Zarzouna, Tunisia
Youssef Lahbib
Affiliation:
Laboratory of Environment Bio-monitoring (LBE), Department of Biology, University of 7th November at Carthage, Faculty of Sciences of Bizerte, 7021 Zarzouna, Tunisia
Najoua Trigui El Menif*
Affiliation:
Laboratory of Environment Bio-monitoring (LBE), Department of Biology, University of 7th November at Carthage, Faculty of Sciences of Bizerte, 7021 Zarzouna, Tunisia
*
Correspondence should be addressed to: Najoua Trigui El Menif, Laboratory of Environment Bio-monitoring (LBE) Department of Biology, University of 7th November at Carthage, Faculty of Sciences of Bizerte, 7021 Zarzouna, Tunisia email: Najoua.TriguiElMenif@fsb.rnu.tn; elmunif2004@yahoo.fr
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Abstract

Tributyltin (TBT) exposure experiments at 5 and 50 ng l−1 concentrations were carried out in the laboratory on female Hexaplex trunculus collected during the reproductive season from a site weakly-affected by imposex (12.1%). The imposex intensity estimated by the imposex incidence or frequency (I%), the average length of the vas deferens (VDL), the average length of female penis (FPL) and the vas deferens sequence index (VDSI) showed significant variation with TBT concentration. The number of spawning females decreased with TBT concentration. TBT had no effect on the number of egg-capsules laid per female nor on the number of eggs per capsule. The egg-capsules laid in the control and 5 ng TBT l−1 aquaria showed harder texture of the wall compared to those exposed to 50 ng TBT l−1. The mortality rate increased proportionally with TBT concentration and duration of exposure.

Keywords

Hexaplex trunculusTBTexposure experimentsimposexreproductionmortality
Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 89 , Issue 1 , February 2009 , pp. 139 - 146
Copyright
Copyright © Marine Biological Association of the United Kingdom 2009

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