The introduction of Physa acuta (Gastropoda: Physidae) on Ilha Grande, Southeast Brazil, from initial stages to an established population

A four-year study on Ilha Grande, Brazil, revealed that the invasive snail Physa acuta established itself rapidly in a local stream, with population growth influenced by environmental factors like rainfall. Initially dominated by smaller specimens, the population shifted toward intermediate size classes within less than a year. This rapid establishment suggests potential ecological impacts on native species and provides critical insights into the invasion dynamics of non-native gastropods. The findings underscore the need for targeted conservation measures to mitigate the spread and effects of invasive freshwater snails in UNESCO-listed sites like Paraty and Ilha Grande, which are rich in both cultural heritage and biodiversity.

Miyahira, I. C., Gonçalves, I. C. B., Lacerda, L. E. M., Ximenes, R. F., & Santos, S. B. (2023). The introduction of Physa acuta (Gastropoda: Physidae) on Ilha Grande, Southeast Brazil, from initial stages to an established population. Brazilian Journal of Biology, 83. https://doi.org/10.1590/1519-6984.243801