title: Inshore/offshore gradients of imposex and organotin contamination in Nassarius reticulatus (L.) along the Portuguese coast.
abstract: Imposex and organotin (OT) tissue contamination of the netted whelk Nassarius reticulatus (L.) were assessed in the continental shelves around the main estuaries of the central coast of Portugal (Lisbon: Tagus estuary; Setúbal: Sado estuary) and the main coastal lagoon in the Southern of Portugal (Faro: Ria Formosa). Pollution levels were higher in areas of more intense boat traffic and shipyard activities and imposex showed a clear decreasing gradient from the estuaries to the offshore, in relation to a similar gradient of tissue contamination by tributyltin. Remarkably, imposex was extensively spread over the adjacent continental shelves of Tagus and Sado estuaries. The current work shows that TBT pollution is undoubtedly a matter of concern not only for the above estuaries where harbours are implanted but also for the adjacent continental shelves, regardless the massive dilution of contaminants that may occur in these deeper areas.
authors.affiliation: Departamento de Biologia, Universidade de Aveiro, 3810-193 Aveiro, Portugal. mileneg@bio.ua.pt
authors.forename: Miléne
authors.initials: M
authors.lastname: Rato
authors.forename: Miguel B
authors.initials: MB
authors.lastname: Gaspar
authors.forename: Shin
authors.initials: S
authors.lastname: Takahashi
authors.forename: Shinichi
authors.initials: S
authors.lastname: Yano
authors.forename: Shinsuke
authors.initials: S
authors.lastname: Tanabe
authors.forename: Carlos
authors.initials: C
authors.lastname: Barroso
mesh_terms: D000818:Animals; D001267:Atlantic Ocean; D012734:Disorders of Sex Development / Q000139:chemically induced*; D004784:Environmental Monitoring; D005260:Female; D008297:Male; D009947:Organotin Compounds / Q000032:analysis* / Q000633:toxicity*; D011174:Portugal; D012908:Snails / Q000737:chemistry / Q000187:drug effects*; D014874:Water Pollutants, Chemical / Q000032:analysis* / Q000633:toxicity*
chemical_list: D009947:Organotin Compounds; D014874:Water Pollutants, Chemical