| Main Ref. | Beguer, M., M. Girardin and P. Boët, 2007 |
| To | Gironde and Adour Estuary |
| FAO area | Atlantic, Northeast |
| From | unknown |
| FAO area | |
| Year | 2006 |
| Range | |
| Period | 1975-present |
| Established in the Wild | probably yes, self reproducing |
| Established in Aquaculture | |
| Significant Ecological Interactions | yes - adverse |
| Significant Socio-economic Effects | |
| Introduced by | |
| Reason | ballast water |
| Other Reason | |
| Comments | The first sample of P. macrodactylus was found in 1998, followed by several in 1999 and 2000. In 2006, specimens of P macrodactylus were recorded in Gironde and Adour Estuaries. The presence of ovigerous females in Gironde Estuary suggests a possibly established and self-reproducing population. Interactions with local fauna may cause a decrease in the native shrimp population abundance due to food competition, and a disturbance in estuarine functioning due to the additional resource for fish species with the spread of P. macrodactylus. |