Imposex in the Dogwhelk (Nuclella lapillus) due to TBT Contamination: Improvement at High Latitudes

摘要

Studies on imposex in the dogwhelks (Nucella lapillus) in Icelandic waters in 1998 show that the level of imposex Has decreased considerably since 1992-1993, two years After implemntation of restrictions on the use of tribu- Tyltin (TBT)-based anti-fouling pain. Vas Deferens Se- Quence Index (VDSI) and Relativle Penis Size Index (RPSI) levels have declined considerably, both near large and small harbours. The impact area of a large harbour complex has decreased considerably, while lesser changes were seen in the impact areas near smaller har- bours.