Assessment of tributyltin contamination based on imposex in Stramonita rustica ao longo do Litoral Sul da Bahia
This study investigated the effects of tributyltin (TBT) on the morphology of the genital system of the gastropod Stramonita rustica in southern Bahia, Brazil. For this, 330 specimens were collected during the summer of 2014 at eight sampling points to ascertain whether male sex organs had developed...
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Veröffentlicht in: | Brazilian journal of biology 2017-01, Vol.77 (1), p.185 |
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Hauptverfasser: | , |
Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | This study investigated the effects of tributyltin (TBT) on the morphology of the genital system of the gastropod Stramonita rustica in southern Bahia, Brazil. For this, 330 specimens were collected during the summer of 2014 at eight sampling points to ascertain whether male sex organs had developed in addition to the complete female genital tract in females (= imposex). The analyses were made under a stereoscopic microscope. Imposex and their associated indexes, and the sterile females, exhibited the highest rates in harbors and shipyards areas. Despite the total ban of TBT in anti-fouling paints on a global scale since 2003, the results of this and other studies indicate the continued use of those paints on the Brazilian coast. This shows the inefficiency of existing legislation and the need to strengthen enforcement of the ban. Keywords: antifouling, sterilization, harbors, TBT. Este estudo investigou os eleitos de tributil-estanho (TBT) sobre a morfologia do sistema genital do gastropode Stramonita rustica (Lamarck, 1822) no Litoral Sul da Bahia, Brasil. Para isso, 330 especimens foram coletados durante o verao de 2014 em oito pontos de amostragem, para verificar se os orgaos sexuais masculinos tinham se desenvolvido para alem do trato genital feminino completo (= imposex). As analises foram feitas sob um microscopio estereoscopico. O imposex e seus indices associados, assim como as femeas estereis, apresentaram as maiores taxas em areas portuarias e estaleiros. Apesar da proibicao total do TBT em tintas anti-incrustantes em escala global desde 2003, os resultados deste e de outros estudos indicam a continuidade de uso dessas tintas na costa brasileira. Isso mostra a ineficacia da legislacao vigente e reforca a necessidade de se cumprir integralmente o banimento. Palavras-chave: antifouling, esterilizacao, portos, TBT. |
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ISSN: | 1519-6984 |
DOI: | 10.1590/1519-6984.15115 |