*Department of Biology and Marine Technology, Catholic University, Cafsilla 127, Talcahuano, Chile.
Genetic and morphological divergence between populations of the flatfish Platichthys flesus (L.) (Pleuronectidae)
Article first published online: 28 JUN 2008
Biological Journal of the Linnean Society
Volume 17, Issue 4, pages 395–408, June 1982
How to Cite
GALLEGUILLOS, R. A. and WARD, R. D. (1982), Genetic and morphological divergence between populations of the flatfish Platichthys flesus (L.) (Pleuronectidae). Biological Journal of the Linnean Society, 17: 395–408. doi: 10.1111/j.1095-8312.1982.tb02029.x
- Issue published online: 28 JUN 2008
- Article first published online: 28 JUN 2008
- Accepted for publication November 1981
- Platichthys — Pleuronectidae;
- protein polymorphism;
- evolutionary relationships
Populations of the flounder, Platichthys flesus, were screened for electrophoretically detectable protein variation at up to 37 loci. Atlantic and North Sea populations (subspecies flesus) were genetically very similar to one another (I>0.99) but different from Adriatic (subspecies italicus) and Black Sea (subspecies luscus) populations. The values for genetic identity between subspecies were around 0.9. Diagnostic loci enabled specimens of flesus, italicus and luscus to be differentiated from one another. Samples of flesus showed two to three times the heterozygosity levels ofitalicus or luscus, consistent with the greater population size offlesus. Morphological comparisons enabled populations to be categorized to subspecies. Platichthys flesus italicus and luscus are valid subspecies: the terms are not synonyms. The genetic distance data provide an estimate of divergence time of the three subspecies at about 2 My ago, an estimate that seems reasonable in the light of present knowledge concerning the recent geological histories of the Mediterranean and Black Sea basins.