The Dog – Whelk, Nucella Lapillus (L.) On The Rocky Shores Of Gower Peninsula, U.K. After The 1987 Tributyltin Restrictive Legislation.
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Date
2010
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Publisher
Sebha University
Abstract
The occurrence of imposex female Nucella lapillus (L.) on the Gower Peninsula in 1992
with little development of the vas deferens (VDS) and very small relative penis size (RPS)
suggests that, following the restrictive legislation for Tributyltin (TBT) in 1987, only residual
levels of less than 1ng/1 remain in the sea water close to the relatively sheltered shores near
the small boat Mooring, at Mumbles and near Swansea Docks.
These results indicate that UK. Environmental quality target levels of less than 2 ng/1 of
TBT has been achieved on the Gower Peninsular.
In addition to the occurrence of the imposex females, the level of contamination on
sheltered shores may increase penis bulk in males but is insufficient to (a) sterilize the
females, (b) reduce population density, (c) affect the sex ratio or (d) to modify the shell
characters of the dog-whelk. Some shell characteristics, however, change with variation in
exposure to wave action. The more remote exposed shores appear to be free from
contamination by TBT.The occurrence of imposex female Nucella lapillus (L.) on the Gower Peninsula in 1992
with little development of the vas deferens (VDS) and very small relative penis size (RPS)
suggests that, following the restrictive legislation for Tributyltin (TBT) in 1987, only residual
levels of less than 1ng/1 remain in the sea water close to the relatively sheltered shores near
the small boat Mooring, at Mumbles and near Swansea Docks.
These results indicate that UK. Environmental quality target levels of less than 2 ng/1 of
TBT has been achieved on the Gower Peninsular.
In addition to the occurrence of the imposex females, the level of contamination on
sheltered shores may increase penis bulk in males but is insufficient to (a) sterilize the
females, (b) reduce population density, (c) affect the sex ratio or (d) to modify the shell
characters of the dog-whelk. Some shell characteristics, however, change with variation in
exposure to wave action. The more remote exposed shores appear to be free from
contamination by TBT.