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Full-Text Articles in Animal Sciences
Improved Methods For Deterring Cliff Swallow Nesting On Highway Structures, Michael Delwiche, Robert W. Coates, W. Paul Gorenzel, Terrell P. Salmon
Improved Methods For Deterring Cliff Swallow Nesting On Highway Structures, Michael Delwiche, Robert W. Coates, W. Paul Gorenzel, Terrell P. Salmon
Human–Wildlife Interactions
Cliff swallows (Petrochelidon pyrrhonota) are migratory birds that frequently nest on highway structures, such as bridges. Because cliff swallows are protected by the Migratory Bird Treaty Act of 1918, nesting control methods must not harm cliff swallows or disturb active nests. This can cause delays for maintenance divisions of state departments of transportation, resulting in additional cost. In a multiyear project, we evaluated the effects of bioacoustic deterrents and bridge surface modifications on nesting behavior of cliff swallows. We used cliff swallow alarm and distress calls as bioacoustic deterrents (hereafter, broadcast calls [BC]) because they previously had been …
Evaluation Of Damage By Vertebrate Pests In California Vineyards And Control Of Wild Turkeys By Bioacoustics, Robert W. Coates, Michael J. Delwiche, W. Paul Gorenzel, Terrell P. Salmon
Evaluation Of Damage By Vertebrate Pests In California Vineyards And Control Of Wild Turkeys By Bioacoustics, Robert W. Coates, Michael J. Delwiche, W. Paul Gorenzel, Terrell P. Salmon
Human–Wildlife Interactions
Complaints of agricultural damage by wild turkeys (Meleagris gallopavo), particularly from wine grape growers, have increased in California. We assessed damage by vertebrate pests in vineyards and tested a bioacoustic-aversion technique for turkeys as an alternative to other control techniques (e.g., reflective tape, trapping, bird netting). We selected 12 vineyards in the Napa Valley and Sierra Foothills American Viticultural Areas of California. We conducted damage surveys to assess percentages of missing or damaged grapes (i.e., grapes that had been stripped, pecked, and plucked) for every grape cluster on 20 randomly-selected vines before harvest in 2007 and on 40 …