Thais (Stramonita) rustica (Lamarck, 1822) (Mollusca: Gastropoda: Thaididae), a potential bioindicator of contamination by organotin northeast Brazil

Submitted by Caroline Silva (krol_bilhar@hotmail.com) on 2012-12-12T14:52:57Z No. of bitstreams: 1 05.pdf: 154071 bytes, checksum: 25f7c8f8f1abad93e06921f0a7bb77da (MD5)Approved for entry into archive by Michele Fernanda(michele_fernandas@hotmail.com) on 2013-08-22T20:51:05Z (GMT) No. of bitstreams: 1 05.pdf: 154071 bytes, checksum: 25f7c8f8f1abad93e06921f0a7bb77da (MD5)Made available in DSpace on 2013-08-22T20:51:05Z (GMT). No. of bitstreams: 1 05.pdf: 154071 bytes, checksum: 25f7c8f8f1abad93e06921f0a7bb77da (MD5) Previous issue date: 2004The use of antifouling paints containing the biocide compound tributyltin (TBT) has been shown as an inductor of imposex in neogastropods mollusks. Imposex is characterized by the development of male features in females, mainly the appearance of a no functional vas deferens and penis. Samples of Thais rustica were collected in eight sites in the metropolitan area of Natal city, Rio Grande do Norte state, northeast Brazil, and examined for occurrence of imposex, which was found in many females. The higher imposex levels were presented by samples from sites near city harbor.A utilização de tintas antiincrustrantes contendo o composto biocida tributilestanho (TBT) tem induzido moluscos neogastrópodes ao imposex. O imposex é caracterizado pelo surgimento de caracteres sexuais masculinos, sobretudo, pênis e vaso deferente não funcionais em fêmeas desses moluscos. Foram coletadas amostras de Thais rústica em oito estações ao longo da costa da cidade de Natal no Rio Grande do Norte. Esses animais foram analisados quanto a presença e o grau de imposex que apresentavam. Os níveis mais elevados de imposex foram observados na estação mais próxima ao porto