The tradition of stocking whitefish ( Coregonus spec.) is widespread throughout Europe and dates back more than a century in some lakes. Despite its broad acceptance as a management action, stocking success is less often studied and might change with shifts in ecosystems. Similar to many other large lakes in Central Europe, Lake Constance is stocked with millions of larvae each year at great cost. The last evaluation of this m...

Natural colonizations across watersheds have been frequently proposed to explain the present distributions of many freshwater fish species. However, detailed studies of such potential watershed crossings are still missing. Here, we investigated potential postglacial watershed crossings of the widely distributed European bullhead ( Cottus gobio L.) in two different areas along the Rhine–Rhône watershed using detailed genetic an...