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Mar Pollut Bull. 2018 Mar;128:17-23. doi: 10.1016/j.marpolbul.2018.01.012. Epub 2018 Jan 9.

First assessment of the effectiveness of the international convention on the control of harmful anti-fouling systems on ships in Tunisia using imposex in Hexaplex trunculus as biomarker.

Author information

1
Département de Biologie, Groupe de Malacologie Fondamentale et Appliquée (GMFA), Laboratoire de Biosurveillance de l'Environnement (LBE), Faculté des Sciences de Bizerte, Université de Carthage, 7021 Zarzouna, Tunisia; Département de la Formation Technique et Appliquée, Institut Supérieur des Métiers du Patrimoine de Tunis, Université de Tunis, 10, Rue de Kélibia, Beb El Khadra, 1006 Tunis, Tunisia. Electronic address: lahbibyoussef@yahoo.fr.
2
Département de Biologie, Groupe de Malacologie Fondamentale et Appliquée (GMFA), Laboratoire de Biosurveillance de l'Environnement (LBE), Faculté des Sciences de Bizerte, Université de Carthage, 7021 Zarzouna, Tunisia.

Abstract

The global ban on the use of tributyltin (TBT) forced in September 2008 was ratified in Tunisia as late as June 2011. In this context, the present study aims to highlight the consequences of TBT contamination by monitoring 22 Tunisian sites before (2007) and after the ban (2012 and 2016) using as biomarker the occurrence of imposex in Hexaplex trunculus. From 2004 to 2016, complete recovery from imposex was reported in 11 sites. All average imposex indices calculated for each sampling year also decreased: imposex incidence from 61 to 27%, VDSI from 2 to 0.7, and RPLI from 15.7 to 1.6%. Ecological Quality Ratios (EQR) revealed that the sampling sites are in moderate to good ecological status. Overall, the present study confirms the effectiveness of the enacted legislation in reducing the impact of TBT pollution along the Tunisian coast.

KEYWORDS:

Hexaplex trunculus; Imposex; Post-ban; Tributyltin (TBT); Tunisia

PMID:
29571360
DOI:
10.1016/j.marpolbul.2018.01.012
[Indexed for MEDLINE]

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