What ecological conditions may prevent fish from outmigrating?
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Ecological conditions that may prevent fish from outmigrating include factors such as migration delay, loss in reservoir, avoidance of downstream bypass, and water depths on the spillway . Damming rivers can create ecological barriers, altering downstream migration patterns due to changes in hydrophysical and morphological structures, impacting fish life activities . Environmental variability, anthropogenic activities, and alterations in fish habitats (e.g., dams, pollution, climate change) can compound the challenges faced during migration, disproportionately affecting migratory freshwater fish populations globally . Temporary oceanographic conditions can act as ecological bridges or barriers, influencing the movements of highly migratory species and leading to changes in population spatial dynamics, with significant implications for marine ecosystem management .
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| Papers (5) | Insight |
|---|---|
| Environmental factors like altered habitats due to dams, pollution, and climate change, along with anthropogenic activities, can hinder fish outmigration, impacting their migratory success. | |
41 Citations | Temporary anomalous oceanographic conditions can act as ecological barriers, restricting fish movements, preventing outmigration, and altering trophic interactions, impacting population dynamics in marine ecosystems. |
| Factors like migration delay, reservoir losses, bypass avoidance, and spillway water depths can hinder downstream passage for fish, creating an ecological trap for outmigrating individuals. | |
2 Citations | Environmental variability or intrinsic organism factors may hinder fish outmigration due to changes in temperature, food availability, or life-stage requirements, impacting their movement patterns. |
9 Citations | Morphological complexity of water bodies and low water exchange can create ecological barriers, hindering fish outmigration by altering downstream migration conditions in dammed rivers. |
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