Clinal genetic variation and isolation by distance in the European eel Anguilla anguilla (L.)
Maes, G.E.; Volckaert, F.A.M.J. (2005). Clinal genetic variation and isolation by distance in the European eel Anguilla anguilla (L.), in: Maes, G.E. Evolutionary consequences of a catadromous life-strategy on the genetic structure of European eel (Anguilla anguilla L.). pp. 85-100
In: Maes, G.E. (2005). Evolutionary consequences of a catadromous life-strategy on the genetic structure of European eel (Anguilla anguilla L.). PhD Thesis. Katholieke Universiteit Leuven. Faculteit Wetenschappen: Leuven. 223 pp., more
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| Keywords |
Aquatic organisms > Marine organisms
Biology > Genetics > Population genetics
Bioselection
Enzymes > Allozymes
Genetic diversity
Anguilla anguilla (Linnaeus, 1758) [WoRMS]
Atlantic North East [Marine Regions]
Marine/Coastal |
| Author keywords |
allozymes; Atlantic Ocean; genetic variation; marine organisms;population genetics; selection; spatial structure |
| Abstract |
The genetic variability and structure of the European eel (Anguilla anguilla L.) in populations throughout Europe was reassessed using 15 allozymic loci, seven of which were polymorphic. Seven sites were sampled on a latitudinal gradient across the natural continental range, extending from southern France to southern Norway. Heterozygosity (He = 0.05) and level of polymorphism (P = 0.43) were comparable to other marine fish. Populations were poorly differentiated (GST = 0.014, FST = 0.002), which is not surprising considering the high dispersal capability of the European eel. However, a significant geographical cline was detected at two alleles (IDh-1*100 and GPI-1*110), andgenetie distances (DCE) were concordant with geographical coastal distances. Mantel tests, pairwise FST's and multidimensional scaling analyses identify three distinct groups: Northern Europe, Western Europe and the Mediterranean Sea. We propose that the clinal genetic structure in the European eel may be due to (1) isolation by distance (as recently detected with microsatellites), (2) temporal reproductive separation, (3) post-larval selective forces, (4) contact between formerly separated groups or (5) some combination thereof. |
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