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Co-occurrence of Sinanodonta woodiana with native Unionidae in the lower Oder

Szlauer-Łukaszewska A., Andrzejewski W., Gierszal H., Urbańska M.

Oceanological and Hydrobiological Studies

2017

Vol. 46, No. 2

244--248

The Asiatic bivalve Sinanodonta woodiana (Lea, 1834), which is more and more widespread in all parts of Europe, in Poland has been mostly reported from lentic waters, especially fish ponds. In contrast to some other European countries, no data have been published on its presence in rivers of Poland. In 2015, monitoring was carried out in the lower Oder River and in the mouth of the Warta River, as a result of which S. woodiana was recorded there for the first time. This was possible due to prolonged drought, which led to extremely low water levels in most of the inland water bodies and watercourses, so that other research methods could be used. The presented results confirm that the species spreads easily by colonizing waters of various types, which in the future may lead to the formation of large populations.

The current invasion status of Anodonta woodiana (Lea, 1934) in Poland - study of habitat parameters

Andrzejewski W., Urbańska M., Mazurkiewicz J., Gierszal H., Golski J.

Oceanological and Hydrobiological Studies

2013

Vol. 42, No. 2

173-180

The study of fish ponds have confirmed the presence of nine new locations of Anodonta woodiana in Poland, with strong and vital populations. These are examples of Chinese pond mussels accidentally introduced along with fish imports. Comparison of known localities shows that more mussels are in eastern Poland, from which the migration path of A. woodiana progresses. Most often mussels settle in larger water reservoirs with elongated shapes. Older and longer mussels occur in deeper fish ponds. Moreover, the further south the location, the higher biomass can be obtained. The average age of mussels in a fish pond depends on its bed type and depth; however the latter has less influence. New locations of this species are also to be expected due to deliberate introduction; cases of resettlement of individual specimens of the Chinese pond mussel to new locations have been recorded.

The story of one clam. Probably the oldest location of the Chinese pond mussel Sinanodonta woodiana (Lea, 1834) (Bivalvia, Unionidae) in Poland

Urbańska M., Łakomy A., Andrzejewski W., Mazurkiewicz J.

Oceanological and Hydrobiological Studies

2012

Vol. 41, No. 1

41-45

The discovery of a shell of the Chinese pond mussel in 1998 and further confirmation of this species indicate that a reservoir with natural thermal conditions is the oldest species location in Poland. Growth increments of an archival shell do not fall within the ranges obtained by this species in Konin lakes. They are, however, close to population ranges from Hungary. In contrast to other specimens found, the analyzed shell has a very high H/L ratio and is thicker. The observed features might result from the founder effect or they might point to a considerable plasticity of the species.