The conservation actions for the marble trout included the search for reproductively active specimens, which were captured in the wild and then released to obtain eggs for the Piantonetto incubator. During the search for suitable specimens, the scientific service researchers and the surveillance personnel of the Park discovered a site of the utmost importance for the marble trout: the Vallone del Roc. This is where they found "pure" specimens of marble trout, i.e., fish with no signs of cross-breeding with the brown trout, which is one of the most severe threats to the conservation of the species. Next spring, a trail through this area of the Park will be fitted out with panels illustrating the problems addressed and the initiatives undertaken for the conservation of this species of salmonids.
Click here to download the panels arranged along the Roc trait or to look for others panels
It's winter, in the Park, the high altitude lakes are frozen and covered with a thick layer of snow. The aquatic ecosystems seem to be at rest… But the BIOAQUAE project does not stop! Right now, in the incubator in Valle di Ghiglieri (Vallone di Piantonetto) the hatching of the fish eggs produced within the framework of the marble trout preservation program is nearing completion. This is now the second season of reproduction for this endangered salmonid and the results obtained so far are very encouraging.
In late autumn, the eggs were squeezed out from a number of marble trout specimens and placed in the incubator to develop. A few days ago, the eggs began to hatch and the rearing tanks were soon populated with thousands of tiny fish.
For a few days after the hatching of the eggs, the baby fish are self-sufficient, in that they get their nourishment from their yolk-sacs, a bag shaped structure which is part of the embryo and gradually disappears as the fish grow (it can be clearly seen in the photo below). Once the yolk-sac has been absorbed, a very demanding and delicate stage begins, as the Park staff has to feed the juveniles and monitor their growth.
In a few weeks' time, measuring activities will also get underway to assess the survival and conditions of the juveniles and the young trout released into the torrents a year ago.
While waiting for the thaw, the activities of the BIOAQUAE project for the conservation of aquatic ecosystems go on!
Are you interested in the “International Meeting on the Conservation of High Mountain Lakes”? It will take place on July 6-8th, 2017 at the Gran Paradiso National Park, Ceresole Reale, Italy, in the frame of the conclusive events of the LIFE Project BIOAQUAE (Biodiversity Improvement of Aquatic Alpine Ecosystems, LIFE11 BIOIT000020). The meeting is organized in collaboration with the LIFE Project Limnopirineus (Restoration of lentic habitats and aquatic species of Community interest in high mountains of the Pyrenees, LIFE13 NAT/ES/001210) and is focused on the role of the Natura2000 sites and protected areas, on the recent research advances, and also on management strategies and specific experiences to achieve a long term conservation of high mountain lake ecosystems.
We look forward to meet you in Ceresole Reale.
Info and contacts:
Come ormai da tradizione nel mese di ottobre l'università degli Studi di Genova ospiterà una conferenza sul progetto BIOAQUAE, stato di avanzamento e risultati raggiunti. Non perdetela!
New brochures with the updated progress of the 3 actions of BIOAQUAE have been produced and are now available. You can find them during BIOAQUAE activity and in the Park offices, or you can download it here