The freshwater bivalve Anodonta woodiana is native to China and widely distributed in Asia, Europe, North America. However, natural populations of A. have dramatically declined recently. Several fish species been used as potential hosts breeding programs; nonetheless, the optimal host yet be identified. In this study, we examined suitability five (bighead carp, common crucian yellow catfish, ti...

Plastic has become one of the most prominent contaminants in recent decades, posing a major environmental threat with critical implications for seafood safety. Thus, we investigated abundance and characterization microplastics (MPs) sediment bivalves from Çıldır Lake, Almus Dam Kartalkaya Lake Turkey. The MPs ranged 19-156 MP kg$^{-1}$ sediments, while 0.75-10.0 individual$^{-1}$ (indiv.$^{-1}$...

Fossil blister pearls attached to the shells of an Anodonta mollusk from China, early Early Pleistocene, are reported here for the first time. The pearls were investigated in detail using a variety of methods. Micro-CT scanning of the fossil pearls was carried out to discover the inner structure and the pearl nucleus. Using CTAn software, changes in the gray levels of the biggest pearl, which r...

1. The rate of heart beat increased with temperature and was three times as high in the active as in the inactive animal. 2. The rate of shell valve movement rose and the rate of heart beat fell when the foot was extended. 3. The rates of heart beat and shell valve movement decreased when the water was saturated with carbon dioxide. This heart response remained when the visceral ganglion was de...

In many taxa females appear to base their mate choice on multiple traits. But the relative importance of different traits in mate choice has rarely been determined. Here we show that females of a freshwater fish, the European bitterling, Rhodeus sericeus, base their mate choice on multiple traits that differ in their reliability as indicators of expected reproductive success and are used at dif...