Established in San Francisco Bay, California (Ruiz 2000). Mid-Atlantic Region: Lake Erie; various ponds in Connecticut and Massachusetts; Whitewater River in Augusta, Kansas (Distler 2003); Potomac River and Chesapeake Bay, Maryland (Ruiz 2000); Cocheco River, New Hampshire; Delaware River, New Jersey; Hudson River and Niagara River, New York; Columbia River, Oregon (Apalategui 2004); Schuykill River and Susquehanna River, Pennsylvania; Annaquatucket River, Rhode Island; and a few isolated locations in Maine and Virginia.
Mid-Atlantic Region: various ponds in Connecticut and Massachusetts; Potomac River, Maryland; Cocheco River, New Hampshire; Delaware River, New Jersey; Hudson River and Niagara River (1931), New York; the Catawba, Deep, Haw, Neuse, Roanoke, Yadkin, and lower Pee Dee rivers in North Carolina (B. Jones, pers. comm); Schuykill River and Susquehanna River, Pennsylvania; Annaquatucket River, Rhode Island; and a few isolated locations in Maine and Virginia.
Great Lakes Region: The first record of C. chinensis in the Great Lakes dates from some time between 1931 and 1942 from the Niagara River, which flows into Lake Ontario (Mills et al. 1993). Cipangopaludina chinensis occurs in Lake Erie, where it was introduced some time prior to 1968 (Wolfert and Hiltunen 1968). Cipangopaludina chinensis was found for the first time in Oneida Lake, which flows to Lake Ontario, in 1977-1978 (Clarke 1978, Jokinen 1992). Jokinen (1982) records occurrences of populations of C. chinensis in the drainages of Lake Erie, Lake Ontario and Lake Michigan, from the states of Michigan, Indiana, Ohio, Wisconsin, and New York.
Ecology: Cipangopaludina chinensis feeds non-selectively on organic and inorganic bottom material as well as benthic and epiphytic algae, mostly by scraping, but diatoms are probably the most nutritious food it ingests at sites in eastern North America (Jokinen 1982).
It prefers lentic water bodies with silt, sand, and mud substrate in eastern North America, although it can survive in slower regions of streams as well (Jokinen 1982, Stanczykowska et al. 1971). This species has been found in waters in eastern North America with pH 6.5–8.4, calcium concentration of 5–97 ppm, magnesium concentration of 13–31 ppm, oxygen concentration of 7–11 ppm, depths of 0.2–3 m, conductivity of 63–400 μmhos/cm, and sodium concentration of 2–49 ppm (Jokinen 1982, Jokinen 1992, Stanczykowska et al. 1971). It can tolerate conditions in stagnant waters near septic tanks (Perron and Probert 1973). Prefers slow-moving freshwater rivers, streams, and lakes with soft, muddy or silty bottoms.
This species is ovoviviparous (Jokinen 1992). Females live up to 5 years, while males live up to 3, occasionally 4 years (Jokinen 1982, Jokinen 1992). Female fecundity is usually greater than 169 young in a life time, and may reach up to 102 for any given brood (Jokinen 1982). All females generally contain embryos from May to August and young are born from June through October in eastern North America in shallow water, then females begin migrating to deeper water for the winter in the fall (Jokinen 1982, Jokinen 1992, Stanczykowska et al. 1971). Females bear more young in their 4th and 5th years than in other years (Jokinen 1992).
In Korea, this species is known to be a host to the metacercariae Echinostoma cinetorchis, an intestinal trematode parasitic in humans (Chung and Jung 1999). It is also a common host to larvae of echinostomes in the Kinmen islands (Chao et al. 1993).
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