Download or read book Snowy Plover Demography in Oregon written by and published by . This book was released on 2019 with total page 167 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Pacific Coast population of the Western Snowy Plover (Charadrius nivosus nivosus) is listed as threatened and has been the target of long-term, multi-pronged management in Oregon. The Oregon coastal population has been intensively monitored since 1990, and over 80% of the population is color banded, but a comprehensive analysis of demographic parameters and the effect of management on vital rates and population growth has been unavailable until now. Here, the author used capture-mark-resight techniques to document survival at each life stage and to explore environmental and management factors that best explained variation in survival over a 25-year study period. The author analyzed the effects of habitat restoration, exclosure use, and lethal predator management on survival at appropriate life stages and evaluated the effects of one management option, lethal predator control, on overall population growth. The author used the survival analyses and productivity data in a matrix population model to reveal that population growth is most sensitive to changes in adult survival, and that while predator management is important for continued growth, its use may be scaled back by as much as 50% and still maintain a growing population. Results, encompassing all phases of this species' life cycle, demonstrate that with holistic and thoughtful adaptive management, and with the cooperation of numerous agencies, a balance can be struck between protection and control of native species to bring about recovery of species threatened with (local) extinction.

Download or read book White Lake Snowy Plover Population and Production Survey written by Steven D. Summers and published by . This book was released on 1982 with total page 4 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 written by and published by . This book was released on 2001 with total page 256 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 Population Differentiation Among Snowy Plovers Charadrius Alexandrinus in North America written by Leah R. Gorman and published by . This book was released on 2000 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt: Two North American subspecies of Snowy Plovers (Charadrius alexandrinus) have been described: the Cuban Snowy Plover (C. a. tenuirostris) and the Western Snowy Plover (C. a. nivosus). Coastal populations of the Western Snowy Plover are listed as Threatened under the U.S. Endangered Species Act, while populations of the Cuban Snowy Plover in the southeastern U.S. and Puerto Rico show evidence of decline and are being considered for listing. To clarify the relationships among populations, we examined variation in mitochondrial (mtDNA) sequences and at inter-simple sequence repeat (ISSR) loci among 8 populations distributed across North America and the Caribbean. MtDNA d-loop region sequences (322 bp, n = 126) revealed 8 haplotypes, with one haplotype unique to Puerto Rico, and indicated that Puerto Rico is significantly differentiated from all mainland populations. Conversely, neighbor-joining analysis of 16 ISSR loci suggests that Puerto Rico is nested within a cluster of populations from eastern continental North America. Evidence for structure among continental populations was weak among mtDNA haplotypes (ST = 0.025, p = 0.178), but analysis of ISSR markers supported subdivision into groups east and west of the Rocky Mountains (IST = 0.445, p

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 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 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 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 Population Viability of Snowy Plovers in Coastal Northern California written by Luke J. Eberhart-Phillips and published by . This book was released on 2012 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Population Ecology and Conservation of Charadrius Plovers written by Mark A. Colwell and published by CRC Press. This book was released on 2019-04-26 with total page 343 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 40 or so species of beach-loving plovers (genus Charadrius) comprise a diverse group of shorebirds found around the world. Most of these species are challenged by changing climates and other human-related development activities, yet they provide key insights into basic ecological and evolutionary processes. The expert international contributors take a comparative approach, presenting examples from many worldwide plover studies and synthesizing the group’s most pressing and important topics. The book further presents an emphasis on full life-cycle biology, including the importance of examining migratory connectivity issues, even for non-migratory plovers. Color pages were planned and approved for some pages in this volume, but due to a printing error some copies have incorrectly been released with these pages printed in black and white. Replacement copies with the correct color in place can be obtained upon request by contacting [email protected]. CRC Press extends apologies to any customers affected by this error and for the inconvenience caused. Key Features Serves as a fundamental resource for conservation practitioners Detailed overview of a widely distributed group of shorebirds Authored by renowned specialists who present theoretical and applied perspectives Emphasis on comparative and synthetic approach in all chapters Related Titles McComb, B. et al. Monitoring Animal Populations and Their Habitats: A Practitioner’s Guide (ISBN 978-0-4291-3827-0). Garvey, J. E. & M. R. Whiles. Trophic Ecology (ISBN 978-1-4987-5846-8). Dewdney, A. K. Stochastic Communities: A Mathematical Theory of Biodiversity (ISBN 978-1-1381-9702-2).

Download or read book Snowy Plover Nesting Survey of the Clatsop Plains Clatsop County Oregon written by David P. Anderson and published by . This book was released on 1983 with total page 25 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 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 Western Snowy Plover in Oregon written by and published by . This book was released on 2007 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book An Ecological Characterization of the Pacific Northwest Coastal Region written by and published by . This book was released on 1980 with total page 620 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Habitat Conservation Plan for the Western Snowy Plover written by Eleanor Gaines and published by . This book was released on 2004 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt: