The distribution and reproductive success of the western snowy plover along the Oregon coast - 2006 Public Deposited

http://ir.library.oregonstate.edu/concern/defaults/9593v006z

Descriptions

Attribute NameValues
Creator
Abstract or Summary
  • From 2 April – 14 September 2006, we monitored the distribution, abundance and productivity of the federally Threatened Western Snowy Plover (Charadrius alexandrinus nivosus) along the Oregon coast. From north to south, we surveyed and monitored plover activity at Sutton Beach, Siltcoos River estuary, the Dunes overlook, North Tahkenitch Creek, Tenmile Creek, Coos Bay North Spit, Bandon Beach, and New River. Our objectives for the Oregon coastal population in 2006 were to: 1) estimate the size of the adult Snowy Plover population, 2) locate plover nests, 3) continue use of miniexclosures (MEs) to protect nests from predators and evaluate whether exclosure use can be reduced, 4) determine nest success, 5) determine fledgling success, 6) monitor brood movements, 7) collect general observational data about predators, and 8) evaluate the success of predator management. We observed an estimated 177-179 adult Snowy Plovers; a minimum of 135 individuals was known to have nested. The adult plover population was the highest estimate recorded since monitoring began in 1990, and we found the highest number of nests since monitoring began in 1990 (n = 147). Overall Mayfield nest success was 38%. Exclosed nests (n=68) had a 60% success rate, and unexclosed nests (n=79) had a 40% success rate. Nest failures were attributed to unknown depredation (18%), unknown cause (18%), one egg nests (16%), wind/weather (13%), abandonment (13%), corvid depredation (10%), adult plover depredation (6%), infertility (4%), and red fox (Vulpes vulpes) depredation (1%). We monitored 84 broods, including 15 from unknown nests, and documented a minimum of 109 fledglings, the highest number of fledglings since monitoring began in 1990. One other chick was raised in captivity at Newport Aquarium and released. Overall brood success was 76%, and fledgling success was 48%. Continued predator management, habitat improvement and maintenance, and management of recreational activities at all sites are recommended to achieve recovery goals.
Resource Type
Date Available
Date Issued
Non-Academic Affiliation
Keyword
Subject
Table of Contents
  • ABSTRACT ...................................................................................................................................ii; INTRODUCTION ...........................................................................................................................1; STUDY AREA ...............................................................................................................................1; METHODS .....................................................................................................................................1; RESULTS .......................................................................................................................................4; Abundance ...........................................................................................................................4; 2005 Hatch-Year Returns.....................................................................................................4; Distribution ..........................................................................................................................5; Nest Activity ........................................................................................................................5; Nest Success........................................................................................................................7; Nest Exclosures....................................................................................................................8; Adult Mortalities................................................................................................................11; Nest Failure ........................................................................................................................11; Fledging Success................................................................................................................12; Brood Movements..............................................................................................................14; Activity Patterns on HRAs.................................................................................................15; Sightings of Snowy Plovers Banded Elsewhere ................................................................16; DISCUSSION...............................................................................................................................16; Habitat Restoration and Development Projects .............................................................................20; RECOMMENDATIONS...............................................................................................................21; Signing of Restricted Areas ...............................................................................................21; General Recommendations ................................................................................................21; ACKNOWLEDGMENTS .............................................................................................................22; LITERATURE CITED..................................................................................................................23; TABLES 1- 24; ...............................................................................................................................27; FIGURES 1- 16.............................................................................................................................51; APPENDIX A. Study Area...........................................................................................................67; APPENDIX B. Site Specific Recommendations ..........................................................................68; APPENDIX C. Analysis of Predator Management Activities ......................................................71
Rights Statement
Publisher
Peer Reviewed
Language
Replaces
Additional Information
  • description.provenance : Approved for entry into archive by Linda Kathman(linda.kathman@oregonstate.edu) on 2010-01-25T16:30:05Z (GMT) No. of bitstreams: 1 The Distribution and Reproductive Success of the Western Snowy Plover along the Oregon Coast 2006.pdf: 792502 bytes, checksum: 06cbea3dd97e0ba5070f4a11f5260509 (MD5)
  • description.provenance : Made available in DSpace on 2010-01-25T16:30:05Z (GMT). No. of bitstreams: 1 The Distribution and Reproductive Success of the Western Snowy Plover along the Oregon Coast 2006.pdf: 792502 bytes, checksum: 06cbea3dd97e0ba5070f4a11f5260509 (MD5) Previous issue date: 2006-12-30
  • description.provenance : Submitted by Amy Ewing (ewinga@onid.orst.edu) on 2010-01-24T03:24:28Z No. of bitstreams: 1 The Distribution and Reproductive Success of the Western Snowy Plover along the Oregon Coast 2006.pdf: 792502 bytes, checksum: 06cbea3dd97e0ba5070f4a11f5260509 (MD5)

Relationships

In Administrative Set:
Last modified: 09/22/2017

Downloadable Content

Download PDF
Citations:

EndNote | Zotero | Mendeley

Items