Ökologische Maßnahmen zum Schutz der Fischpopulation

Ex situ experimentation to determine if introduced artificial habitat can provide alternative refuge to hazardous anthropogenic structures

“…space, food, and light) and mortality risk is high when pumps operate (Rytwinski et al 2017; Norman et al 2023 b ). Attempts to reduce the risks associated with pumping stations has previously included physical and behavioral deterrents to reduce entrainment into pumps (Turnpenny & O'Keeffe 2005), opening gravity drainage channels to restore passage of migratory fish (Baker et al 2021) and pump shutdown during diel movements of resident fish (Reckendorfer et al 2018; Norman et al 2023 c ). However, these remediation measures do not address predator–prey interactions or provide attractive alternative habitat to reduce fish occupancy at hazardous structures.…”

Understanding the Temporal Dynamics of a Lowland River Fish Community at a Hazardous Intake and Floodgate to Inform Safe Operation

“…Operational solutions for the protection of migratory fish include using spillway releases to limit fish passage through turbines at dams (Williams, 2008), opening sluice gates to facilitate downstream European eel movement at PSs (Egg et al, 2017;Baker et al, 2021) and turbine and pump shutdown during seasonal migrations (Gilligan and Schiller, 2003;Trancart et al, 2013). In turn, turbine and pump shutdown could be used during diel movements of river-resident fish (Baumgartner et al, 2009;Reckendorfer et al, 2018). To do so requires knowledge on local multi-species community ecology, as the predictable temporal periods in fish activity at hazardous intakes are intrinsically linked with shifts in day and night light intensity, water temperature and hydrology, and predator avoidance.…”