Polypoid growths of the foot, mantle, and pericardium have been found repeatedly in bivalve molluscs. These growths (reviewed by Pauley, 1969; Sparks, 1972) generally are composed of essentially normal tissues and have been variously interpreted. Forty-seven (15.7 percent) of 299 freshwater mussels, Anodonta californiensis, with foot lesions were collected by Gilbert B. Pauley from the Columbia...

Freshwater mussels in California's rivers are potentially very useful as indicators of watershed health and recorders of watershed changes. We report the occurrence and habitat of mussel populations within a continuous 8-km section of the South Fork Eel River in the Northern Coast Range of California. The primary goals of our study were 1) to compile information on species composition and popul...

Freshwater mussels are important constituents of freshwater ecosystems, yet much of their basic biology remains to be examined. The behavior of 3 species of unionid mussels (Unio tumidus, Unio pictorum, and Anodonta anatina) was examined in the lowland River Spree (Germany). Mussels were marked individually, and their positions on the sediment surface and depth below the sediment surface were r...

Cyanobacteria are a potential threat to aquatic ecosystems and human health because of their ability produce cyanotoxins, such as microcystins (MCs). MCs regularly monitored in fresh waters, but rarely estuarine marine waters despite the possibility downstream export. Over period two years, we monthly analyzed intracellular (in phytoplankton) extracellular (dissolved water) at five stations alo...

This research represents the first attempt in Italy to develop a cage system for adult freshwater mussel stocking, for extensive farming, that was realized from 2003 to 2005 in NW Italy. Two autochthonous species of Italian freshwater mussel were used: Anodonta anatina and Unio mancus. 5133 mussels were collected and successively stocked in floating cages in 5 different sites in a lake. This st...

This research represents the first attempt in Italy to develop a cage system for adult freshwater mussel stocking, for extensive farming, that was realized from 2003 to 2005 in NW Italy. Two autochthonous species of Italian freshwater mussel were used: Anodonta anatina and Unio mancus. 5133 mussels were collected and successively stocked in floating cages in 5 different sites in a lake. This st...