1/1988 vol. 2
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RESEARCH PAPER
Analysis of some shell features of Valvata cristata O. F. Müller, 1774 (Prosobranchia: Valvatidae) from fish-pond in Ligota-Zabrzeg (Upper Silesia)
Izabela Rembecka 1
 
 
 
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Faculty of Biology, Silesian University, Katowice, Poland
 
 
Publication date: 2020-05-14
 
 
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Izabela Rembecka
Faculty of Biology, Silesian University, Bankowa 9, 40-007 Katowice, Poland
 
 
Folia Malacol. 1988;2(1):77-82
DOI: https://doi.org/10.12657/folmal.002.006
 
 
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KEYWORDS
shell
seasonal variability
Silesia
Poland
 
ABSTRACT
Height and breadth of shells of Valvata cristata O. F. Müller, 1774 were measured; growth lines on the shells were counted. The shell height was found to range from 0.5 to 1.4 mm, while the shell breadth from 1.0 to 3.5 mm; there was no significant correlation between the shell size and growth lines number. Samples of 50 individuals chosen at random each month (from May to October) were divided into size-classes and the distribution pattern of the classes in the vegetation period was analysed. Young individuals were found to appear in July.
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ISSN:1506-7629
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