A temporal and spatial monitoring of organotin pollution in a harborside region of Brazil by imposex and ecological quality ratio using Leucozonia nassa

This study represents the first use of Leucozonia nassa (Mollusca-Gastropoda) in a program of long-term monitoring. Specimens of L . nassa were collected between 2006 and 2014 and analyzed for the occurrence of imposex in two areas in Southeastern Brazil, one control area and another characterized b...

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Published in:	Environmental monitoring and assessment Vol. 189; no. 12; pp. 650 - 16
Main Authors:	da Costa, Mercia Barcellos, Zamprogno, Gabriela Carvalho, Otegui, Mariana Beatriz Paz, de Morais, Letícia, Pedruzzi, Felipe Corteletti, Dalbem, Gabriel Bautz, da Silva, Daniele Angeli, Resende, Allana Cristini Borges
Format:	Journal Article
Language:	English
Published:	Cham Springer International Publishing 01-12-2017 Springer Nature B.V
Subjects:	Animals Antifouling Antifouling substances Atmospheric Protection/Air Quality Control/Air Pollution Bans Bioindicators Developing countries Earth and Environmental Science Ecological monitoring Ecology Ecotoxicology Environment Environmental Management Environmental monitoring Environmental science Frameworks Hazardous materials Imposex Indicator organisms Indicator species LDCs Leucozonia nassa Males Marinas Marine molluscs Mollusks Monitoring/Environmental Analysis Organotin compounds Penis Pollution Pollution monitoring Ports Steel products Tributyltin Tropical climate Tropical environment Tropical environments Vas deferens Water management Water pollution Brazil Biological indicator Organotin pollution Imposex EQR Leucozonia nassa
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Summary:	This study represents the first use of Leucozonia nassa (Mollusca-Gastropoda) in a program of long-term monitoring. Specimens of L . nassa were collected between 2006 and 2014 and analyzed for the occurrence of imposex in two areas in Southeastern Brazil, one control area and another characterized by the presence of many ports and marinas. Imposex was evaluated in nine sites based on the percentage of females exhibiting imposex (I%), relative penis length index and vas deferens sequence index, classical indices to evaluate tributyltin (TBT) impacts. Moreover, this study uses for the first time in a tropical environment the ecological quality ratio (EQR), an approach to verify the imposex levels as an indicator of the impact by organotin compounds according to the EU Water Framework Directive. The results confirm the occurrence of high levels of imposex in L . nassa with all the indices evaluated. Furthermore, the results also indicate that, despite the international ban, antifouling paints based on TBT are still possibly used in Brazil. In addition, this study shows that L . nassa has the characteristics that make it a suitable bioindicator to monitor TBT pollution, and that the use of the EQR may create important data regarding this problem.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	0167-6369 1573-2959
DOI:	10.1007/s10661-017-6367-7