Technical Report
 

The Distribution and Reproductive Success of the Western Snowy Plover along the Oregon Coast - 2014

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Abstract
  • We monitored the distribution, abundance and productivity of the federally threatened Western Snowy Plover (Charadrius nivosus nivosus) along the Oregon coast from 1 April – 15 September 2014. From north to south, we surveyed and monitored plover activity at Sutton Beach, Siltcoos River estuary, the Dunes Overlook, North and South Tahkenitch Creek, Tenmile Creek, Coos Bay North Spit, Bandon Snowy Plover Management Area, New River HRA and adjacent lands, and Floras Lake. Our objectives in 2014 were to: 1) estimate the size of the adult Snowy Plover population along the Oregon coast, 2) locate plover nests, 3) determine nest success, 4) use mini-exclosures (MEs) to protect nests from predators as needed, 5) determine fledging success, 6) monitor brood movements, and 7) collect general observational data about predators. We observed an estimated 338 adult Snowy Plovers; a minimum of 280 individuals were known to have nested. The adult plover population was the highest estimate recorded since monitoring began in 1990. We monitored 346 nests in 2014. Overall apparent nest success was 60%. Nest failures were attributed to unknown depredation, unknown cause, mammalian depredation, abandonment, wind/weather, one-egg nests, avian depredation, overwashed, infertility, and corvid depredation. We monitored 221 broods, including 12 from unknown nests, and documented a minimum of 272 fledglings. Overall brood success was 77%, fledging success was 48%, and 1.68 fledglings per male were produced.
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  • Lauten, D.J., K.A. Castelein, J.D. Farrar, A.A. Kotaich, E.P. Gaines. 2014. The Distribution and Reproductive Success of the Western Snowy Plover along the Oregon Coast - 2014. The Oregon Biodiversity Information Center, Institute for Natural Resources. Portland, Oregon. 53 p.
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  • US Fish and Wildlife Service
  • Siuslaw National Forest
  • Oregon Department of Fish and Wildlife
  • Coos Bay District Bureau of Land Management
  • Oregon Parks and Recreation Department
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  • Results in this report are preliminary. Please do not cite them in other reports or the scientific literature without the authors’ permission.

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