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The importance of peat excavation water bodies for biodiversity and conservation : a case of three Unionidae (Bivalvia) mussel species

Ożgo M., Abraszewska A.

Polish Journal of Ecology

2009

Vol. 57, nr 4

793-798

This paper presents populations of Anodonta cygnaea (L.), Anodonta anatina (L.) and Unio pictorum (L.) inhabiting an artificial pond (area 0.3 ha, depth 4 m) formed at a peat excavation site 13 years prior to the collection of the data. The mussels probably colonized the pond as glochidia attached to host fish introduced for angling or migrating with flood waters. The mussel populations were characterized by high densities, high average and maximum shell lengths and high proportions of young individuals. Our study shows that man-made ponds can become favorable habitats for freshwater mussels, and that relatively short time is needed to establish their viable populations. Active conservation of unionid mussels in man-made habitats may require human help at the dispersal stage.

Biometrics of the mussel Anodonta cygnea (L.) inhabiting in 2005 the Binowo and Bobolin Lakes near Szczecin

Chojnacki J.C., Lewandowska A., Rosińska B.

Oceanological and Hydrobiological Studies

2007

Vol. 36, No.3

21-37

Research on the swan mussel population was conducted in 2005 on a sample of 497 individuals inhabiting Binowo and Bobolin Lakes, Szczecin, Poland. Length, width, height and age of individuals was examined. Binowo Lake was inhabited by individuals aged 1+ to 7+ years, while individuals aged 1+ to 6+ inhabit Bobolin Lake. Measurable features of swan mussels inhabiting Binowo Lake were as follows: individuals were 3.80 to 10.20 cm long, 1.70 to 5.70 cm wide, 0.70 to 3.70 cm thick, and in Bobolin Lake, 4.00 to 15.20 cm long, 2.20 to 7.70 cm wide, 0.80 to 5.70 cm thick. The age structure of both populations included individuals of diverse ages, with 3 and 4-year old individuals dominating in both lakes. A modest fraction of the youngest individuals (1,2-year old) as well as the oldest (6,7-year old) was observed in the examined lakes. All correlations between shell length, width, height and mussel age showed large positive correlations and results obtained from both lakes were similar.