The reasons for this are two-fold: In the first place the turbulent Susquehanna is crowded
with fishways.
In comparison to previous years, increased recruitment of diadromous fish (which migrate between fresh and salt water) was recorded at the
barrage fishways.
This water was used to support site management by balancing the need to minimise potential impacts associated with low lake water levels and the critical need to maintain
minimum fishway flows through the barrages into the Coorong.
Direct mortality occurs when fish pass through turbines,
over fishways, or through fish bypasses.
Tagged fish were released in the high flows downstream of a dam in southwestern British Columbia and tracked as they navigated through
a fishway and two lakes to their spawning grounds.
Activities include the celebration of the removal of a dam in Japan and the inauguration of over 20 new «
fishways» past dams on rivers around the globe.