engleski

The unique genetic profile of the brown trout population in the Krka River, Croatia

Molecular genetic studies of brown trout Salmo trutta L. throughout its natural range have demonstrated five major phylogenetic lineages. Such studies have revealed that the species is genetically and geographically highly structured. It is especially important for highly structured species, such as brown trout, that conservation activities are focused at population level. The brown trout population from the Krka River represents the natural population of brown trout from a poorly studied area of south-east Europe. A 562 bp fragment at the 5’ end of mitochondrial DNA control region was sequenced from the population representatives and compared to corresponding brown trout sequences obtained in previous studies. Sequence analysis of the mtDNA control region of brown trout from the Krka River revealed the existence of four major phylogenetic lineages. The native status is assigned to the Adriatic, Mediterranean and marmoratus lineages, while the presence of the Atlantic lineage is a consequence of stocking practice. The results of this study show that brown trout population in the Krka River possesses a unique genetic profile that should be taken into account in future conservation strategies.

brown trout; phylogenetic lineages

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