Long-term monitoring of Nucella lapillus imposex in Ria de Aveiro (Portugal): When will a full recovery happen?
| Autor: | Ítalo Braga Castro, Gilberto Fillmann, Fiamma Eugênia Lemos Abreu, Diana M. Gomes, Carlos M. Barroso, Isabel Oliveira, Susana Galante-Oliveira |
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| Rok vydání: | 2021 |
| Předmět: |
0106 biological sciences
Imposex Male biology Portugal 010604 marine biology & hydrobiology Gastropoda Disorders of Sex Development Zoology 010501 environmental sciences Aquatic Science Oceanography biology.organism_classification 01 natural sciences Pollution Full recovery Long term monitoring Animals Female Trialkyltin Compounds Water Pollutants Chemical 0105 earth and related environmental sciences Nucella Environmental Monitoring |
| Zdroj: | Marine pollution bulletin. 168 |
| ISSN: | 1879-3363 |
| Popis: | Nucella lapillus imposex has been monitored in Ria de Aveiro (Portugal) in order to understand the evolution of organotin (OT) pollution after the EU ban on OT-based antifouling systems (OT-AFS). A rapid decrease of imposex occurred, but a countercurrent tendency upsurged recently (2018-2019) with a slight increase of imposex at some sites, instead of a continuous decline towards a complete recovery. In 2018 the vas deferens sequence index ranged between 0.6 and 1.0 across stations and the percentage of females with imposex varied from 63 to 100%. In 2019 these parameters varied between 0.4 and 1.0 and 37-100%, while the concentration of butyltins (TBT, DBT, MBT) in the dogwhelk tissues were 1 ng Sn g-1 dw. Although N. lapillus imposex levels are low they are indicative of OT pollution. The full recovery of N. lapillus imposex in the future is uncertain and a cause for concern. |
| Databáze: | OpenAIRE |
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