Ecological Risk Screening Summary - Corbicula sandai (a clam, no common name) - Uncertain Risk

Species that are considered uncertain risk need a more in-depth assessment beyond the Risk Summary to better define the species’ risk to U.S. environments. This additional information will help inform decisions on where, when, and how the species may be used to minimize risks of them becoming invasive.

Corbicula sandai, is a freshwater clam native to Lake Biwa and the Yodo River in Japan. C. sandai is a popular food resource in Japan, which has led to a decline in the population size. The history of invasiveness is not documented. This species has been transplanted to Suwa-ko in Nagano Prefecture, Japan. No negative impacts have been documented in this location. Records of new established populations in waterways in Japan were found, but there was no information on impacts from those populations. The climate match for the contiguous United States was medium. In general, the Eastern States had higher climate matches than the Western States. The certainty of assessment is low due to a lack of information and taxonomic uncertainty. The overall risk assessment category for Corbicula sandai is uncertain.