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- Title
Ontogenetic morphometrics of individual freshwater pearl mussels ( Margaritifera margaritifera (L.)) reconstructed from geometric conchology and trigonometric sclerochronology.
- Authors
Helama, Samuli; Valovirta, Ilmari
- Abstract
This study bridges two conchological approaches to model the growth characteristics of freshwater pearl mussel shell: size-at-age and sclerochronology. We demonstrate a simple numerical model that transfers sclerochronological data into realistic estimates of ontogenetic shell sizing. This model was constructed for a subset of shell growth data dealing with morphometrics and annual shell growth increments. Further, validation of the model was performed using a dataset that was withheld from the calibration. Both subsets of data showed significant correlations between the observed (measured by vernier callipers) and reconstructed size-at-age data, indicating a successful model. The practical applicability of the model was exemplified for the studied Finnish freshwater pearl mussel populations. In accordance with the previously set theory about the plasticity of life history traits of the species, the southern mussels showed higher growth rates than the northern mussels.
- Subjects
FINLAND; MOLLUSKS; FRESHWATER mussels; MARGARITIFERA margaritifera; SEASHELLS; SCLEROCHRONOLOGY; ONTOGENY; MATHEMATICAL models; MUSSELS; BIOGEOGRAPHY; PHYSIOLOGY
- Publication
Hydrobiologia, 2008, Vol 610, Issue 1, p43
- ISSN
0018-8158
- Publication type
Article
- DOI
10.1007/s10750-008-9421-1