Abstract
In four stations located close to the channels connecting the Lagoon of Venice with the Adriatic Sea (two inside the lagoon and two outside it), individuals of Hexaplex trunculus were collected in order to assess their contamination. Concentrations of some organotin compounds, i.e. tributyltin and triphenyltin with their di- and mono- substituted metabolites, were measured and endocrine disruption such as imposex (superimposition of male sexual characteristics on females of gonochoristic gastropods) was observed. Vas deferens sequence indexes (VDSI) of 4.1-4.9 were found in organisms from stations inside the lagoon, and 3.6-4.2 in the sea stations. Organotin derivatives were measured in both the visceral coil and the rest of the soft body of the organisms. Total concentrations of butyltin compounds ranged from 102 +/- 17 to 432 +/- 27 ng Sn g(-1) d.w. in the visceral coil, and from 96 +/- 24 to 297 +/- 107 ng Sn g(-1) d.w. in the rest of the soft body. Phenyltins were found at far lower concentrations, ranging from 8 +/- 1 to 41 +/- 3 ng Sn g(-1) d.w. (visceral coil) and from 0.25 to 32 +/- 22 ng Sn g(-1) d.w. (rest of soft body). The degree of imposex in female gastropods, evaluated from VDSI and penis lengths, was related to ...Continue Reading
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