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

Abstract

This study presents a four-year follow-up of an introduced population of Physa acuta Draparnaud, 1805, from initial stages to an established population. This introduction occurred on a small impacted stream of Vila do Abraão, the main village of Ilha Grande (Angra dos Reis, Rio de Janeiro, Brazil). The population size increased during the study, and presented a relationship to environmental factors, especially with rainfall. On the initial stages of introduction prevailed the smaller specimens, but on the overall, predominated the intermediate size classes. After less than a year, P. acuta becomes established on this stream and was possibly affecting the other species found on the stream. The information presented here is useful to understand the invasion process of invasive snails, as well as directing conservation efforts.

The first record of the North American freshwater limpet Ferrissia californica (Mollusca, Gastropoda) in Morocco

“…The number of the col� lected F. californica individuals was relatively low in this first study. This suggests that the invasion could be at its initial stage, as also observed for introduction of Physa acuta (Draparnaud, 1805) in Ilha Grande (Miyahira et al, 2021). It is expected that the species range will increase exponentially across Morocco as has happened in Europe (Glöer, 2019).…”

Efeitos de lâmpadas, com diferentes comprimentos de onda, sobre o molusco gastrópode Physa acuta

“…Considerando o interesse em abordagens experimentais, que visam o controle de moluscos (Camargo et al, 2022b;Camargo et al, 2022c;Miyahiraa et al, 2021;Olson & Barbieri, 2014); alguns estudos utilizam lâmpadas UV em laboratório (Perepelizin & Boltovskoy, 2014).…”