Imposex in Thais Clavigera (Neogastropoda) As an Indicator of Tbt (Tributyltin) Bioavailability in Coastal Waters of Hong Kong

  • Blackmore G
  • 9


    Mendeley users who have this article in their library.
  • 25


    Citations of this article.


The degree of imposex (the imposition of male characteristics onto
females) exhibited by females of Thais clavigera, collected during
August 1996, was assessed using the Relative Penis Size Index (RPSI)
and the Vas Deferens development sequence (VDS), to ascertain the
extent of TBT (tributyltin) bioavailability in Hong KongUs coastal
waters. All sites showed some degree of imposex development. The most
affected areas were Victoria Harbour and Aberdeen where up to 92% of
females were effectively sterilised by the development of a vas
deferens, thereby, blocking the oviduct (VDS scores of 4-6 and RPSI of
32-41%). There is some evidence of this affecting the population
structure of T. clavigera, i.e., a dominance of males in affected
populations. A Tolo Harbour site, at Starfish Bay, remote from major
shipping routes was the least affected having an 88% incidence of
imposex (VDS scores of 0-2 and RPSI of > 0.1%).

Get free article suggestions today

Mendeley saves you time finding and organizing research

Sign up here
Already have an account ?Sign in

Find this document


  • Graham Blackmore

Cite this document

Choose a citation style from the tabs below

Save time finding and organizing research with Mendeley

Sign up for free