Adding to the confusion of salmonid taxonomy, there are other trout with marble pattern beside Salmo marmoratus. One is trout from the river Otra, Norway. A certain percentage of brown trout from that river has marble pattern. In all other aspects, these trout are identical to the non marble brown trout from the same river. This is an example of intrapopulational polymorphism .
Recent studies also imply that marble trout from Neretva and Montenegro are not closely related to Salmo marmoratus. The pattern probably developed in geographically remote regions independently. In addition, genetic studies revealed that marble trout from Neretva is genetically indistinct from Salmo dentex.
Appearance, Biology and Ecology
The marble trout has a long, cylindrical body, slightly compressed laterally, with a large... Read More