Invasion
Invasion Description
1st Established Record: off Po Delta/Adriatic Sea (1990s, Albano et al. 2017, reproducing populations found in sediment cores).
1st Record: off Po Delta/Adriatic Sea (1970s, Albano et al. 2017, shells found in sediment cores, but not reaching reproductive size because of heavy metal contmaination).
Geographic Extent
from Jesolo to Lecce/Italy/Adriatic Sea (Morello et al. 2004); Grado/Italy/Gulf of Trieste (2002, Crocetta 2011); Pirano/Slovenia/Gulf of Trieste (2008, Crocetta 2011; Lipej et al. 2012); Croatia/Lim Bay, Adriatic Sea (6/2011, Josip Miku and Marijana Pearevi, in ICES Advisory Committee on the Marine Environment 2012; Pecarevic et al. 2013); off Po Delta/Adriatic Sea (1990s, Albano et al. 2017, reproducing populations found in sediment cores); Kotor/Montenegro/Adriatic Sea (2015, Petovic et al. 2019)
Vectors
| Level | Vector |
|---|---|
| Alternate | Hull Fouling |
| Alternate | Ballast Water |
Regional Impacts
| Ecological Impact | Competition | |
| Anadara transversa has achieved numerical dominance at some locations, suggesting successful competition (Morello et al. 2004) | ||
| Ecological Impact | Habitat Change | |
| Juvenile Anadara transversa frequently attach, by byssus threads to the native gastropod Aporrhais pespelecani, the native bivalve Chamelea gallina, and the introduced Anadara inaequivalvis, interfering with their movement. However, the shells of A. transversa also tend to be heavily infested with boring polychaetes (Polydora sp.) (Morello et al. 2004). | ||