Download or read book The Distribution and Reproductive Success of the Western Snowy Plover Along the Oregon Coast 2007 written by and published by . This book was released on 2007 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt: From 3 April - 21 September 2007, 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 2007 were to: 1) estimate the size of the adult Snowy Plover population, 2) locate plover nests, 3) continue selected use of mini-exclosures (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 effectiveness of predator management. We observed an estimated 181-184 adult snowy plovers; a minimum of 162 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 = 202). Overall Mayfield nest success was 33%. Exclosed nests (n=38) had a 66% success rate, and unexclosed nests (n=164) had a 41% success rate. Nest failures were attributed to unknown depredation (20%), one-egg nests (20%), corvid depredation (17%), abandonment (16%), unknown cause (7%), unknown mammal depredation (7%), overwashed (3%), infertility (3%), coyote depredation (3%), wind/weather (3%), raccoon depredation (1%), and adult plover depredation (1%). We monitored 89 broods, including four from unknown nests, and documented a minimum of 123 fledglings; the highest number of fledglings since monitoring began in 1990. Overall brood success was 82%, fledgling success was 54%, and 1.60 fledglings per male were produced. Continued predator management, habitat improvement and maintenance, and management of recreational activities at all sites are recommended to achieve recovery goals.
Download or read book The Distribution and Reproductive Success of the Western Snowy Plover Along the Oregon Coast 2008 written by and published by . This book was released on 2008 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt: From 1 April - 24 September 2008, 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 2008 were to: 1) estimate the size of the adult Snowy Plover population, 2) locate plover nests, 3) continue selected 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 effectiveness of predator management. We observed an estimated 187-199 adult Snowy Plovers; a minimum of 129 individuals was known to have nested. The adult plover population was the highest estimate recorded since monitoring began in 1990, and we found 196 nests in 2008. Overall Mayfield nest success was 30%. Exclosed nests (n = 51) had a 44% success rate, and unexclosed nests (n = 145) had a 38% success rate. Nest failures were attributed to unknown depredation (28%), one-egg nests (17%), corvid depredation (15%), abandonment (15%), unknown cause (9%), wind (6%), overwashed (6%), adult depredation (2%), infertility (2%), unknown mammal depredation (1%), and weasel depredation (1%). We monitored 70 broods, including three from unknown nests, and documented a minimum of 71 fledglings. Overall brood success was 66%, fledgling success was 47%, and 1.13 fledglings per male were produced. Continued predator management, habitat improvement and maintenance, and management of recreational activities at all sites are recommended to achieve recovery goals.
Download or read book The Distribution and Reproductive Success of the Western Snowy Plover Along the Oregon Coast 2006 written by and published by . This book was released on 2006 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Western Snowy Plover Habitat Conservation Plan written by and published by . This book was released on 2010 with total page 372 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Snowy Plover Nesting Ecology on the Oregon Coast written by Ruth A. Wilson and published by . This book was released on 1980 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt: The possibility of reduced abundance of western snowy plovers (Charadrius alexandrinus nivosus) in the face of an altered habitat prompted a study of snowy plover breeding activities and nesting habitat on the Oregon coast during 1978 and 1979. At 4 study areas with varying levels of recreational use, nests were located and observed. Cover characteristics of nesting habitat were assessed with line intercept and mThe possibility of reduced abundance of western snowy plovers (Charadrius alexandrinus nivosus) in the face of an altered habitat prompted a study of snowy plover breeding activities ana nesting habitat on the Oregon coast during 1978 and 1979. At 4 study areas with varying levels of recreational use, nests were located and observed. Cover characteristics of nesting habitat were assessed with line intercept and m2 plot sampling. During May and June of each year, appropriate habitat on the coast was surveyed for snowy plovers. Snowy plovers were persistent and adaptable in nesting activities but had low reproductive success (0.2 to 0.4 chicks fledged per female). Of 72 nests observed, at least 19 were lost to corvid predation and 11 were destroyed by storms and moving sand; 9 nests were successful. Factors responsible for loss of chicks prior to fledging were not determined. Relationships were not apparent between nest success and level of recreational activity among study areas. Extensive areas of flat, open sand with sparse cover (an average of 13%) characterized nesting habitat within a 20 m radius of nests. In the immediate vicinity of nests there was an average of 26% cover. Surveys of appropriate habitat on the coast disclosed a maximum of 100 adults and fledged juveniles; 12 discrete beach segments were used by snowy plovers in the 2 years plot sampling. During May and June of each year, appropriate habitat on the coast was surveyed for snowy plovers. Snowy plovers were persistent and adaptable in nesting activities but had low reproductive success (0.2 to 0.4 chicks fledged per female). Of 72 nests observed, at least 19 were lost to corvid predation and 11 were destroyed by storms and moving sand; 9 nests were successful. Factors responsible for loss of chicks prior to fledging were not determined. Relationships were not apparent between nest success and level of recreational activity among study areas. Extensive areas of flat, open sand with sparse cover (an average of 13%) characterized nesting habitat within a 20 m radius of nests. In the immediate vicinity of nests there was an average of 26% cover. Surveys of appropriate habitat on the coast disclosed a maximum of 100 adults and fledged juveniles; 12 discrete beach segments were used by snowy plovers in the 2 years.
Download or read book Willapa National Wildlife Refuge N W R Comprehensive Conservation Plan written by and published by . This book was released on 2011 with total page 848 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Western Snowy Plover Charadrius Alexandrinus Nivosus Pacific Coast Population Draft Recovery Plan Appendixes written by and published by . This book was released on 2001 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Revision of the Resource Management Plans of the Western Oregon Bureau of Land Management Districts written by and published by . This book was released on 2008 with total page 572 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Federal Register written by and published by . This book was released on 1995-03 with total page 1036 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nest site Selection and Reproductive Success of the Western Snowy Plover in Kansas written by Matthew G. Sexson and published by . This book was released on 2006 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Snowy Plover Distribution Abundance and Reproductive Success written by Scott F. Pearson and published by . This book was released on 2007 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Habitat Use and Reproductive Success of Western Snowy Plovers at New Nesting Areas Created for California Least Terns written by Abby Neva Powell and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The Northern Prairie Wildlife Research Center of the U.S. Geological Survey (USGS) presents the full text of "Habitat Use and Reproductive Success of Western Snowy Plovers at New Nesting Areas Created For California Least Terns," written by Abby N. Powell and Christine L. Collier. The authors detail their studies of the habitat use and reproduction of the threatened western snowy plovers in the nesting habitat created for the endangered least terns.
Download or read book Shifting Sands written by Jeremy J. Pohlman and published by . This book was released on 2020 with total page 59 pages. Available in PDF, EPUB and Kindle. Book excerpt: Understanding the social and physical factors that influence the temporal and spatial distribution of a species is imperative for successful management. The Western Snowy Plover (Charadrius nivosus nivosus) selects for wide-open stretches of beach; yet within large expanses of ideal habitat, plover populations tend to be aggregated. Recent evidence suggests plovers may prioritize social information over ideal physical factors alone when selecting breeding locations. I analyzed data collected on an individually marked population of Snowy Plovers in Humboldt County, California from 2001 to 2018 to evaluate the influence of physical (beach width) and social (presence of conspecifics) landscape factors on the population’s breeding distribution. Using an information-theoretic framework, I conducted incidence function models and model selection analyses to examine how physical and social factors influenced inexperienced breeder occupancy of approximately 100 km of plover habitat. Beach width influenced where plovers bred, however, inexperienced plovers were more likely to colonize sites occupied by experienced conspecifics. Reproductive success had minimal influence on settlement of inexperienced breeders the following season. This information suggests the species’ successful recovery requires an added emphasis on social information for future habitat restoration efforts.
Download or read book Snowy Plover Charadrius Alexandrinus written by Ruth A. Jacobs and published by . This book was released on 1986 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Distribution Abundance and Nesting Characteristics of Snowy Plovers on the Oregon Coast written by R. Wilson-Jacobs and published by . This book was released on 1984 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Silver Strand Training Complex written by and published by . This book was released on 2011 with total page 878 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Conspecific Attraction in the Breeding Distribution of the Western Snowy Plover Charadrius Alexandrinus Nivosus written by Zachary J. Nelson and published by . This book was released on 2007 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:
