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A decadal study of biometric and imposex indices in two gastropods
Published online by Cambridge University Press: 20 June 2019
Abstract
We have monitored tributyltin (TBT) pollution in Galicia (NW Spain) for more than a decade by means of assessing gastropod imposex in populations of Nucella lapillus (N ≥ 34) and Tritia reticulata (N ≥ 18) at regular intervals. Several thousand specimens were processed to obtain their shell height (SH), penis length (PL) and vas deferens sequence (VDS); imposex indices (including the VDS index, VDSI) were subsequently calculated. The regional mean SH of both females and males has not changed significantly in either species throughout the study. This also applies to the mean male PL in N. lapillus, but male T. reticulata penises surprisingly enlarged. On the contrary, the regional mean female PL (MFPL) and all imposex indices significantly decreased in both snails. Results confirm previous conclusions based on the chemical analyses of tissues and partial imposex observations. In addition, the close correlations between MFPL and VDSI show some potential applications to TBT biomonitoring.
Keywords
- Type
- Research Article
- Information
- Journal of the Marine Biological Association of the United Kingdom , Volume 99 , Issue 7 , November 2019 , pp. 1601 - 1614
- Copyright
- Copyright © Marine Biological Association of the United Kingdom 2019
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Ruiz et al. supplementary material
Table S1
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Ruiz et al. supplementary material
Table S2
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