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Imposex occurrence in Nassarius vibex from South America: a potential bioindicator in estuarine environments

Published online by Cambridge University Press:  07 April 2010

Flávia Bezerra Lima-Verde*
Affiliation:
Laboratório de Zoobentos—Instituto de Ciências do Mar, Avenida da Abolição, 3207 Bairro Meireles, 60165-081, Fortaleza, CE, Brazil
Ítalo Braga de Castro
Affiliation:
Laboratório de Microcontaminantes Orgânicos e Ecotoxicologia Aquática—Fundação Universidade Federal do Rio Grande, CP 474, CEP 96201-900, Rio Grande, RS, Brazil
Cristina de Almeida Rocha-Barreira
Affiliation:
Laboratório de Zoobentos—Instituto de Ciências do Mar, Avenida da Abolição, 3207 Bairro Meireles, 60165-081, Fortaleza, CE, Brazil
*
Correspondence should be addressed to: F.B. Lima-Verde, Laboratório de Zoobentos—Instituto de Ciências do Mar, Avenida da Abolição, 3207 Bairro Meireles, 60165-081, Fortaleza, CE, Brazil email: [email protected]
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Abstract

Research on organotin compounds (OTCs) contamination in South America is focused on sand/rocky environments; estuarine areas have not yet been investigated. Imposex is an important tool to evaluate OTC contamination. The aim of the present study was to assess the sensitivity of a typical estuarine species to OTC contamination and to biomonitor the spatial extent of such compounds in the estuary. Sampling was conducted along the Ceará River estuary (north-eastern Brazil) and imposex expression was quantified in Nassarius vibex females. Imposexed females developed small papillae or penis, with smaller lengths compared to males. Passive monitoring was conducted on 10 sampling stations around 2 shipyards using imposex quantification indices. Imposex percentage in the population ranged from 0 to 33.3% and relative penis length index ranged from 0 to 26.4%. The present research is the first application of N. vibex as a bioindicator of organotin compounds in Brazil.

Type
Research Article
Copyright
Copyright © Marine Biological Association of the United Kingdom 2010

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References

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