Table 4 Parameters of the von Bertalanffy equation for Unio pictorum and U. tumidus from medieval (EMS) and modern (MS populations).

From: Millennial-scale changes in size and growth of Unio pictorum (L. 1758) and U. tumidus (Philipsson, 1788), in the Oder river

Group

Growth constant (k)

Asymptotic length (L∞), mm

t0

Maximum length (Lm), mm

Maximum age (years)*

U. pictorum

 EMS

0.170

70.12

– 0.250

57.2

10

 MS

0.156

93.85

– 0.787

68.2

8

U. tumidus

 EMS

0.168

96.25

– 0.217

63.0

6

 MS

0.261

87.03

– 0.246

79.4

9

  1. * Maximum age was calculated using the formula published by Ziuganov et al.34.
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