Monitoring of organotin compounds and their effects in marine molluscs

Morcillo, Yolanda; Porte, Cinta

doi:10.1016/s0165-9936(97)00115-5

Cited by 63 publications

(31 citation statements)

References 26 publications

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“…One of the most accepted hypothesis explaining the occurrence of imposex is the inhibition of the P-450 aromatase, responsible for the conversion of androgen into estrogen (Morcillo & Porte, 1998), thus inducing the appearance of male structures in female individuals.…”

Section: Discussionmentioning

confidence: 99%

Imposex induction in Stramonita haemastoma floridana (Conrad, 1837) (Mollusca: Gastropoda: Muricidae) submitted to an organotin-contaminated diet

Lima

Castro²,

Rocha‐Barreira³

2006

Braz. j. oceanogr.

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A B S T R A C TMarine organisms are affected by organotin compounds due to the cumulative, deleterious effects of these latter. The most evident and well known consequence of organotin contamination is imposex, a hormonal disruption that causes a superimposition of sexual male features in females of prosobranchia neogastropod molluscs such as Stramonita haemastoma floridana. Molluscs accumulate organotins mainly because of their poor ability to eliminate TBT and DBT from their tissues. The aim of this study was to analyze organotin uptake by ingestion experimentally, using uncontaminated subjects (S. haemastoma floridana) fed with organotin-contaminated oysters (Crassostrea rhizophorae). A total of 248 gastropods, distributed in 7 tanks with uncontaminated water and contaminated food, were used in this study, a control group being fed uncontaminated oysters. Every 15 days, the individuals of one of the tanks were examined for the presence of imposex. Development of imposex was measured using the VDSI, RPSI and RPLI indexes. The animals had already developed imposex within the first 15 days, all the indexes measured (RPLI, RPSI and VDSI) having increased significantly with duration of exposure, indicating that the animals were probably contaminated by the food and had accumulated the pollutant. New paths of imposex development were also observed. R E S U M OOrganismos marinhos são afetados por compostos organoestânicos que causam uma série de efeitos deletérios aos mesmos. O mais conhecido efeito da contaminação por organoestânicos é o imposex. Esse fenômeno consiste na masculinização de fêmeas de moluscos neogastrópodes tais como Stramonita haemastoma floridana. Esses compostos tendem a se acumular em moluscos devido a sua baixa capacidade de eliminá-los. Um total de 248 indivíduos de S. haemastoma floridana foram coletados de uma população livre qualquer indício de imposex. Esses animais foram mantidos em 7 aquários, com aproximadamente 30 indivíduos cada, 1 desses aquários foi considerado como controle e os animas do mesmo alimentados com ostras obtidas de locais onde não se verificou a ocorrência de imposex em neogastrópodes nativos. Os animais nos outros 6 aquários foram alimentados com ostras obtidas em local onde a incidência de imposex entre os gastrópodes nativos revelou-se muito alta. A cada 15 dias, por um período total de 90 dias, os animais de um dos tanques eram retirados e analisados quanto à presença de imposex. Os níveis de imposex foram quantificados através da % de imposex e dos índices: RPLI, RPSI e VDSI. Observou-se a indução de imposex em S. haemastoma floridana através da dieta a partir de Crassostrea rhizophora e um aumento significativo dos índices com o decorrer do tempo de exposição. Os animais do aquário controle foram analisados ao fim do experimento não revelando qualquer indício de imposex.

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Section: Discussionmentioning

confidence: 99%

Imposex induction in Stramonita haemastoma floridana (Conrad, 1837) (Mollusca: Gastropoda: Muricidae) submitted to an organotin-contaminated diet

Lima

Castro²,

Rocha‐Barreira³

2006

Braz. j. oceanogr.

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“…Imposex in gastropod mollusks has been widely used to monitor the contamination by organotin compounds all around the world (Morcillo and Porte, 1998;Axiak et al, 2002;Minchin, 2003). The reliability of this bioindicator is derived from the fact that imposex originates in one highly specific hormonal alteration, occurring just in gastropods exposed to organotin compounds (Matthiessen and Gibbs, 1998).…”

Section: Introductionmentioning

confidence: 99%

Imposex in endemic volutid from Northeast Brazil (Mollusca: Gastropoda)

Castro

Meirelles

Matthews-Cascon

et al. 2008

Braz. arch. biol. technol.

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“…However, butyltin compounds are still persistent in aquatic ecosystems, particularly in areas with intensive docking activities as well as possible industrial discharges (Morcillo & Porte, 1998). In fact, the restriction is inadequate; TBT is still being used in antifouling paints applied to larger ships (>25 m in length) in most developed countries, and no restriction has been implemented on the usage in most Asian developing countries, including China.…”

Section: Introductionmentioning

confidence: 99%

Butyltins compounds in molluscs from Chinese Bohai coastal waters

et al. 2006

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Concentrations of butyltin compounds including tributyltin (TBT), dibutyltin (DBT) and monobutyltin (MBT) were determined in mollusc samples from Chinese Bohai coastal sites to evaluate the extent of contamination and potential adverse effects on health. Wide existence of butyltins was found in these samples with a detection rate of up to 90%, and the concentrations of the total butyltin ( P BTs: TBT + DBT + MBT) ranged from <2.5 to 397.6 ng Sn/g wet weight (mean 63 ng Sn/g). Among BTs, TBT was the predominant compound in most of the samples, indicating ongoing usage of TBT-based antifouling agents in China. The different accumulation capabilities of BTs among various species were studied. The wide occurrence and serious pollution of BTs in seafood indicated a potential danger for the health of the local people who cared for these foods.

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Monitoring of organotin compounds and their effects in marine molluscs

Cited by 63 publications

References 26 publications

Imposex induction in Stramonita haemastoma floridana (Conrad, 1837) (Mollusca: Gastropoda: Muricidae) submitted to an organotin-contaminated diet

Imposex induction in Stramonita haemastoma floridana (Conrad, 1837) (Mollusca: Gastropoda: Muricidae) submitted to an organotin-contaminated diet

Imposex in endemic volutid from Northeast Brazil (Mollusca: Gastropoda)

Butyltins compounds in molluscs from Chinese Bohai coastal waters

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