Results 131 to 140 of about 347 (168)
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Comparison of imposex response in three Prosobranch species
Hydrobiologia, 1995A comparative study of the three gastropod species Nucella lapillus (L.), Ocenebra erinacea (L.) and Hinia (Nassarius) reticulata (L.) reveals that Nucella is the most TBT sensitive species while Hinia is the least sensitive. Of the two imposex indices VDSI and RPSI, good interspecies correlations were obtained only for VDSL The three species can be ...
M. Huet +3 more
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Gyrineum natator: A potential indicator of imposex along the Indian coast
Chemosphere, 2006Imposex related studies have used neogastropods as sentinel organism. In this effort, we elucidate the potential of a mesogastropod, Gyrineum natator, for imposex monitoring on the central west coast of India. Observations were made with specimens collected from Mumbai (three stations), Ratnagiri (two stations), Goa (one station) and Mangalore (one ...
A C Anil
exaly +3 more sources
Imposex reduction and residual butyltin contamination in southern Brazilian harbors
Environmental Toxicology and Chemistry, 2012Abstract The imposex incidence was appraised in South American gastropods, considering the scenario before and after the global ban of tributyltin (TBT). A statistically significant reduction in imposex indexes was observed in Stramonita haemastoma collected in 2006 and 2010 from areas under the influence of four coastal harbors from ...
Ítalo Braga, Castro +2 more
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New insights into the mechanism of imposex induction in the dogwhelk Nucella lapillus
Comparative Biochemistry and Physiology Part C: Toxicology & Pharmacology, 2005In an attempt to clarify the mechanism(s) of tributyltin-mediated imposex induction in females of the neogastropod Nucella lapillus, dogwhelks collected in an almost imposex free population were exposed to several treatments for a 3 month-period, and the effects on imposex induction and testosterone/estradiol levels were evaluated.
M M, Santos +6 more
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NEOGASTROPOD IMPOSEX FOR MONITORING RECOVERY FROM MARINE TBT CONTAMINATION
Environmental Toxicology and Chemistry, 1996Abstract Imposex, the imposition of male sexual characters on female snails, was used as a bioindicator of recovery from tributyltin (TBT) pollution in the Pacific Northwest. Whelks surveyed before TBT use was regulated had shown a high frequency of affected females in the Strait of Juan de Fuca and the Strait of Georgia; and lower ...
Monica Tester +2 more
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Assessment of organotins and imposex in two estuaries of the northeastern Brazilian coast
Marine Pollution Bulletin, 2018Butyltin compounds (BTs) were used worldwide, especially because of their properties as biocides. Due to its high toxicity, the use of tributyltin (TBT) in antifouling paints has been prohibited in most countries. The occurrence and impact of BTs were assessed in surface sediments and in Stramonita rustica populations of two tropical estuaries that ...
Daniele Claudino, Maciel +5 more
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Triphenyltin induces imposex in Nucella lapillus through an aphallic route
Aquatic Toxicology, 2016Triphenyltin (TPT) was used until recently as a biocide in antifouling systems and nowadays is still applied as an agriculture pesticide in some countries. This compound is known to cause imposex (the imposition of male characters in females of gastropod molluscs) in a very limited number of species, when compared with tributyltin (TBT), the ...
Filipe, Laranjeiro +6 more
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Bulletin of Environmental Contamination and Toxicology, 2012
This is the first report on imposex occurrence in Pugilina morio. Imposex levels in P. morio from Ceará River Estuary were assessed by a non-lethal method. The obtained imposex parameters were: percentage = 37.1 %, female penis length index (FPLI) = 0.93 mm, relative penis length index (RPLI) = 6.5 %, and vas deferens sequence index (VDSI) = 1.0 ...
Deyse, de Azevedo +3 more
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This is the first report on imposex occurrence in Pugilina morio. Imposex levels in P. morio from Ceará River Estuary were assessed by a non-lethal method. The obtained imposex parameters were: percentage = 37.1 %, female penis length index (FPLI) = 0.93 mm, relative penis length index (RPLI) = 6.5 %, and vas deferens sequence index (VDSI) = 1.0 ...
Deyse, de Azevedo +3 more
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Seasonal variation in imposex intensity ofThais clavigera
Chinese Journal of Oceanology and Limnology, 2005Imposex, specifically caused by TBT pollution, refers to the superimposition of male sexual characteristics in gastropod females. Seasonal variation of imposex intensity inThais clavigera from both slightly and severely contaminated sites in Hong Kong waters was studied from 1988 to 1999. The male penis length showed significant difference between both
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Contamination of organotin compounds and imposex in molluscs from Vancouver, Canada
Marine Environmental Research, 2004Gastropods and bivalves were collected at 15 sites at Vancouver and Victoria, Canada between 24 May and 7 June, 1999, to establish tissue concentrations of butyltin and phenyltin compounds, to record imposex symptoms in gastropods, and to assess the present status of organotin contamination around Vancouver. No neogastropods (such as Nucella lima) were
T, Horiguchi +7 more
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