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Influence of DNA isolation from historical otoliths on nuclear-mitochondrial marker amplification and age determination in an overexploited fish, the common sole (Solea solea L.)
Cuveliers, E.L.; Bolle, L.J.; Volckaert, F.A.M.; Maes, G.E. (2011). Influence of DNA isolation from historical otoliths on nuclear-mitochondrial marker amplification and age determination in an overexploited fish, the common sole (Solea solea L.), in: Cuveliers, E.L. (2011). Connectivity and genetic stability in sole (Solea solea). pp. 167-179
In: Cuveliers, E.L. (2011). Connectivity and genetic stability in sole (Solea solea). PhD Thesis. Katholieke Universiteit Leuven (KUL), Faculteit der Wetenschappen, Departement Biologie: Leuven. 256 pp., more

Also published as
  • Cuveliers, E.L.; Bolle, L.J.; Volckaert, F.A.M.; Maes, G.E. (2009). Influence of DNA isolation from historical otoliths on nuclear-mitochondrial marker amplification and age determination in an overexploited fish, the common sole (Solea solea L.). Mol. Ecol. Resour. 9(3): 725-732. dx.doi.org/10.1111/j.1755-0998.2009.02516.x, more

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Keywords
    Age determination; DNA; Growth rate; Historical account; Otoliths; Solea solea (Linnaeus, 1758) [WoRMS]; Marine
Author keywords
    ageing; DNA quality; growth rate; historical DNA; otoliths; Solea solea

Authors  Top 
  • Cuveliers, E.L., more
  • Bolle, L.J.
  • Volckaert, F.A.M., more
  • Maes, G.E., more

Abstract
    Historical otolith collections are crucial in assessing the evolutionary consequences of natural and anthropogenic changes on the demography and connectivity of commercially important fish species. Hence, it is important to define optimal protocols for purifying DNA from such valuable information sources while avoiding any damage to the physical structure of the otolith. Before being able to conclude on the harmlessness of a method, it is important to validate protocols on different kinds of otoliths by testing purification methodologies under standardized conditions. Here we compare the effect of two DNA extraction methods on the success in identifying the age in an overexploited marine fish, the common sole (Solea solea L.). To ensure optimal future population genetic and demographic analyses, we assessed DNA quantity and tested the DNA quality by investigating the amplification success of a mitochondrial and nuclear marker. Our results show that the choice of the DNA extraction method had a significant effect on the success of using these otoliths in age and growth analyses. Standard commercial and published protocols resulted in a severe damaging of the otolith structure, hampering accurate preparation and analyses of the morphological structures of the otoliths. Shortening the lysis time and lowering the EDTA (ethylene diamine tetraacetic acid) and SDS (sodium dodecylsulphate) concentration turned out to be beneficial for the stability of otolith structure, while maintaining an overall high DNA quality measured through polymerase chain reaction amplification success. We therefore recommend that care should be taken when choosing the extraction method for a molecular study on archived samples, in order to enable the maximal use of information embedded in historical material.

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