![]() Specialized equipment has been used to develop 99 biological response models for exposure to blade strike, rapid decompression, or fluid shear. When fish pass through hydropower facilities, they may encounter several stressors, of which the three most common are collision, rapid decompression, and fluid shear. These models help understand how fish are likely to respond during dam passage when exposed to hydraulic and physical stressors associated with turbines and other hydropower structures. Department of Energy’s HydroPASSAGE project efforts to develop and collect biological response models for integration into the Biological Performance Assessment (BioPA) toolset and the Hydropower Biological Evaluation Toolset (HBET). There is a gradual but continuing extirpation in many water bodies, especially in Danube drainage and central Europe, possibly to due competition with introduced Carassius gibelio in non-optimal habitats (Ref. ![]() Marketed fresh and frozen eaten fried, broiled and baked (Ref. Spawns in dense submerged vegetation (Ref. Usually does not occur in waters with rich ichthyofauna and abundant predatory species, but very abundant in the absence of other fish species. Feeds all day but mainly at night on plankton, benthic invertebrates, plant materials and detritus. Tolerates cold, organic pollutants, and low oxygen levels in the water (Ref. Can survive at high temperatures and at very low oxygen concentrations during summer and under ice cover (Ref. Usually restricted to densely vegetated backwaters and oxbows of lowland rivers. They burrow in mud in the dry season or during winter (Ref. ![]() Adults occur in shallow ponds, lakes rich in vegetation and slow moving rivers. ![]()
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