Studies of fishway performance, at the multi-species level in large rivers, are scarce and this raises question passage success both endemic exotic species anthropised environments. The study was conducted downstream part River Meuse (average annual discharge = 400 m3.s-1) on a 13 km transect between two successive fishways (M0 M1). From 2015–2021, total 1065 adult individuals, representing 14 ...