The trout in the Gran Paradiso National Park – Life Bioaquae

Continue with successful actions taken by the Gran Paradiso National Park within the Life project Bioaquae to save the marble trout within the waterways of the protected area. Biologists and researchers working to save the marble trout from extinction.

The trout is a large autochthonous salmonid, marked by light and dark band livery which give the typical marbled design, originally, the undisputed Queen of Alpine streams. At European level, the species is declining, mainly due to the destruction and fragmentation of habitat and hybridisation with brown trout, Atlantic source and introduced in recent decades for fishing, and this is reported by the IUCN (International Union for conservation of nature) among the 100 most harmful invasive species on the planet. In Italy, In addition, the marble trout is placed in the category of conservation "criticism" (the following step is the ’ extinction) and this makes priority actions addressed to its preservation.

In The Park, the recent LIFE project fish monitoring campaigns have led to the discovery of small nuclei Trout of high degree of purity within the boundaries of the protected Area, that, Thanks to the presence of ecological barriers impassable, have been isolated and relatively protected from mass introductions of trout, made out of Park, and they have retained their specific genetic heritage, demonstrating the potential of the species ' adaptation to high altitude streams. And’ must act on two fronts: first protect these small groups, perhaps originating in or more likely linked to historical entries. The marble trout is native to the basin of the Po, that came from the Eastern Mediterranean and this feature makes them assume a high ecological value, so it must be protected through the protection of rhinos in rare areas in which has survived to the continuous input of brown trout, native to the Atlantic Ocean.


The second front relates to actions of active conservation: "In some courses d ’ water of the Park was in fact limited the possibility of hybridization between these two salmonids, through the withdrawal and transfer of specimens of brown trout. and began, successfully, the first actions of training and re-entering the marble trout in streams affected by the project, with the release of both juveniles both small about 6 cm long ", explains Bruno Bassano, Head of the scientific service of the Park. These actions are fully in Life programme of the European Union that co-finances projects related to environmental issues, in this case related to nature and biodiversity, they are of European interest and to help enhance the conservation status of species and habitats at risk.


of team 18 August 2016