First record of the Asian clam Corbicula fluminea (Müller, 1774) (Bivalvia: Cyrenidae) at Poxim-Açu River, northeastern Brazil

Abstract

Aim The objective of this work is to provide a new occurrence record of the Asian clam Corbicula fluminea in the Poxim-Açu River, northeastern Brazil. Methods Samplings were carried out on October 20th of 2016 at five sites along Poxim-Açu River. At each site five samples were taken with a PVC core of 0.25 m of diameter and all individuals found inside core were sorted by hand. Results The species was recorded at all sites with densities ranging from 412±169 to 1692±1474 individuals/m2. Conclusion This record extends the distribution of C. fluminea at northeastern Brazil.

Current distribution of the invasive mollusk Corbicula fluminea (O.F. Müller, 1774) (Bivalvia, Cyrenidae) in Brazil, including a new record from the state of Piauí

“…As verified in our research, the greatest number of occurrences are in lotic environments in Brazilian territory. This is expected and deserves attention as running waters have a greater capacity to easily disperse these bivalves to new areas (Poleze and Callil 2015;Rosa and Dantas 2020). Similarly, the greater occurrence number in natural environments, whether lotic and lentic, indicate significant stress on native fauna, considering environmental changes caused by high population densities of C. fluminea, as discussed by Sousa et al (2008), Stuff (2011), andSazima andD'Angelo (2013).…”