Lincoln (University of Nebraska) · 1995 · 10 citations · 1 references
Open access
Natural ResourcesEcologyFisheriesFisheries ConservationFisheries ManagementWildlife ManagementAnti-predator ResponsesBird ConservationEndangered Species ProtectionFish Predation EcologyPredator AvoidanceWildlife ConservationCable SystemsDam Impacts On FisheriesDamage ControlDamsEndangered Fish Species ProtectionPredationPredation ManagementThreatened Fish Conservation
Predation by ring-billed gulls (Larus delawarenis) has been identified as a significant threat to migrant steelhead and salmon (Oncorhynchus spp.) smolt in the Columbia and Snake Rivers. Bird predation appears highest immediately below hydroelectric facilities. Installation of overhead wire/cable exclusion systems over the tailrace area of 12 dams has been completed to reduce gull predation. Data collected from 1 of the facilities as well as observations from other dams indicate that overhead wire/cable exclusion systems are effective in reducing predation by gulls.
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