title: Imposex and butyltin contamination off the Oporto Coast (NW Portugal): a possible effect of the discharge of dredged material.
abstract: Imposex in the gastropod Hinia reticulata, a bioindicator for tributyltin (TBT) contamination, was investigated in locations at different distances from the Oporto harbour-dredged material discharge site. The degree of imposex found was inversely related to the distance to the discharge site, the highest imposex frequency being found closest to the discharge area. However, the levels of imposex found were low when compared with those reported for H. reticulata populations from moderately TBT-contaminated areas. Despite detectable levels of dibutyltin (DBT) and monobutyltin (MBT) in snail tissues (total butyltins ranging from 84 to 410 ng/g Sn dry wt.), TBT was below detection limit in all snail samples collected in open sea.
authors.affiliation: Department of Zoology and Anthropology, Faculty of Sciences, University of Porto, Pr. Gomes Teixeira, 4099-002 Oporto, Portugal. santos@cimar.org
authors.forename: M M
authors.initials: MM
authors.lastname: Santos
authors.forename: N
authors.initials: N
authors.lastname: Vieira
authors.forename: M A
authors.initials: MA
authors.lastname: Reis-Henriques
authors.forename: A M
authors.initials: AM
authors.lastname: Santos
authors.forename: J L
authors.initials: JL
authors.lastname: Gomez-Ariza
authors.forename: I
authors.initials: I
authors.lastname: Giraldez
authors.forename: C C
authors.initials: CC
authors.lastname: Ten Hallers-Tjabbes
mesh_terms: D000818:Animals; D012734:Disorders of Sex Development / Q000139:chemically induced* / Q000662:veterinary; D004784:Environmental Monitoring; D005260:Female; D008297:Male; D011174:Portugal; D012908:Snails / Q000033:anatomy & histology* / Q000502:physiology*; D014018:Tissue Distribution; D014220:Trialkyltin Compounds / Q000493:pharmacokinetics / Q000506:poisoning*; D014874:Water Pollutants, Chemical / Q000493:pharmacokinetics / Q000506:poisoning*
chemical_list: D014220:Trialkyltin Compounds; D014874:Water Pollutants, Chemical; C011559:tributyltin