Comparative population genetics of Basilichthys microlepidotus (Atheriniformes: Atherinopsidae) and Trichomycterus areolatus (Siluriformes: Trichomycteridae) in north central Chile
To describe comparative population genetic structure of the Chilean silverside Basilichthys microlepidotus and the catfish Trichomycterus areolatus, four rivers and three sites within each river were investigated by the analysis of haplotype polymorphisms of the mitochondrial Control Region. For both species, analyses revealed significant differentiation among rivers and low differences within rivers. However, the species differ in haplotype composition; individuals of B. microlepidotus shared some haplotypes in all four rivers, while individuals of T. areolatus showed a different haplotype composition in most rivers. This difference may be explained by the different ecological features of the species. Assuming that both silversides and catfish were present before the separation of the rivers, B. microlepidotus migrated after river isolation, probably using coastal water, while T. areolatus has probably never migrated between these rivers. The long times that the studied rivers have been separated should be taken into account in future conservation plans for the freshwater fish of Chile.
| Main Authors: | , , |
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| Format: | Artículo de revista biblioteca |
| Language: | English |
| Published: |
SPRINGER
2010-10
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| Subjects: | Silverside, |
| Online Access: | https://repositorio.uchile.cl/handle/2250/120038 |
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| Summary: | To describe comparative population genetic
structure of the Chilean silverside Basilichthys microlepidotus
and the catfish Trichomycterus areolatus, four
rivers and three sites within each river were investigated
by the analysis of haplotype polymorphisms of the
mitochondrial Control Region. For both species, analyses
revealed significant differentiation among rivers and
low differences within rivers. However, the species
differ in haplotype composition; individuals of B.
microlepidotus shared some haplotypes in all four rivers,
while individuals of T. areolatus showed a different
haplotype composition in most rivers. This difference
may be explained by the different ecological features of
the species. Assuming that both silversides and catfish
were present before the separation of the rivers, B.
microlepidotus migrated after river isolation, probably
using coastal water, while T. areolatus has probably
never migrated between these rivers. The long times that
the studied rivers have been separated should be taken
into account in future conservation plans for the
freshwater fish of Chile. |
|---|