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Field Report: 2011 Pinniped Research and Management Activities at and below Bonneville Dam
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2011
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[PDF-1.25 MB]
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Description:In response to increasing pinniped predation at the dam, state, federal, and tribal partners have attempted to deter pinnipeds using a variety of non-lethal deterrents. Starting in 2005, these methods have included aerial and underwater pyrotechnics, acoustic harassment devices, vessel chase, rubber projectiles, and capture-relocation. In 2010 alone, for example, boat-based hazing crews used approximately 5000 rounds of cracker shells, 750 seal bombs, and 100 rounds of rubber buckshot in attempts to deter sea lions from the Bonneville Dam tailraces (Brown et al. 2010). While thought to be potentially effective at deterring predation by new animals arriving at the dam for the first time, they have been ineffective at deterring predation by habituated animals.
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Rights Information:Public Domain
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Compliance:Submitted
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