Western Sandpiper (Calidris mauri)

2014 ◽  
Author(s):  
Samantha Franks ◽  
David B. Lank ◽  
W. Herbert Wilson Jr.
Keyword(s):  
Calidris Mauri ◽  
Western Sandpiper

Western Sandpiper (Calidris mauri)

2020 ◽  
Author(s):  
Samantha Franks ◽  
David B. Lank ◽  
W. Herbert Wilson Jr.
Keyword(s):  
Calidris Mauri ◽  
Western Sandpiper

scholarly journals Apparent Survival Rates of Western Sandpiper (Calidris Mauri) Wintering in Northwest Baja California, Mexico

The Auk ◽  
2003 ◽  
Vol 120 (1) ◽  
pp. 55-61 ◽  
Author(s):  
Guillermo Fernández ◽  
Horacio de la Cueva ◽  
Nils Warnock ◽  
David B. Lank
Keyword(s):  
Hierarchical Modeling ◽  
Survival Rates ◽  
Average Quality ◽  
Apparent Survival ◽  
Calidris Mauri ◽  
Local Survival ◽  
Western Sandpiper ◽  
Western Sandpipers ◽  
Best Fit ◽  
Effect Of Age

AbstractTo estimate annual apparent local survival, we collected capture–resighting data on 256 individually marked male Western Sandpipers (Calidris mauri) wintering at Estero de Punta Banda, Mexico, between 1994–1997. A hierarchical modeling approach was used to address the effect of age class and year on survivorship rates. The best-fit model included a constant apparent survival probability (ϕ = 0.489; 95% CI = 0.410–0.569), but several models fit nearly as well, and averaging among the top five, to account for model uncertainty, suggested that adults had somewhat higher values than juveniles (ϕ = 0.490 ± 0.051 vs. 0.450 ± 0.067). Detection probability was substantially higher for adults than for juveniles (p = 0.741 vs. p = 0.537). Those apparent survival estimates are low compared with those from other studies of Western Sandpipers at breeding and other nonbreeding locations, and substantially lower than the true survivorship rates expected for small sandpipers in general. We interpret these results as indicating that this site is of below average quality for nonbreeding male Western Sandpipers.

Western Sandpiper (Calidris mauri)

1994 ◽  
Author(s):  
W. Herbert Wilson
Keyword(s):  
Calidris Mauri ◽  
Western Sandpiper

scholarly journals Survival of Western Sandpiper Broods on the Yukon-Kuskokwim Delta, Alaska

The Condor ◽  
2005 ◽  
Vol 107 (3) ◽  
pp. 597-604 ◽  
Author(s):  
Daniel R. Ruthrauff ◽  
Brian J. McCaffery
Keyword(s):  
High Latitude ◽  
High Arctic ◽  
Growth Patterns ◽  
Chick Growth ◽  
Hatch Date ◽  
Calidris Mauri ◽  
Mass Growth ◽  
Brood Survival ◽  
Western Sandpiper ◽  
Brood Movement

Abstract The rate of chick growth in high-latitude breeding shorebirds is rapid, but little is known about the effect of chick mass, growth, and brood movements on subsequent brood survival. To address these topics, we monitored chick growth patterns, daily brood movements, and survival of Western Sandpipers (Calidris mauri) on the Yukon-Kuskokwim Delta, Alaska. We assessed the effect of chick age, mass, and hatch date on brood survival using Program MARK. We mapped brood locations daily, and compared brood movement patterns between successful and unsuccessful broods. Younger chicks survived at lower rates and moved shorter distances than older chicks. The overall probability of one or more chicks from a brood surviving to 15 days of age was 0.73 ± 0.05 SE. Brood survival declined seasonally, and broods with heavier chicks survived at higher rates than those with lighter chicks. On average, successful broods fledged 1.7 ± 0.1 SE chicks. Rate of chick growth was intermediate between those of high arctic and temperate-breeding shorebirds, and chick mass at hatching declined seasonally. Western Sandpiper brood survival was lowest when chicks were young, spatially clumped, and unable to maintain homeothermy, probably because young chicks were more vulnerable to both complete depredation events and extreme weather. Our data suggest that larger, older chicks are able to avoid predators by being spatially dispersed and highly mobile; thermal independence, achieved after approximately day five, enables chicks to better endure prolonged periods of cold and low food availability. Supervivencia de Nidadas de Calidris mauri en el Delta Yukon-Kuskokwim, Alaska Resumen. La tasa de crecimiento de polluelos en aves que se reproducen a latitudes altas es rápida, pero se conoce poco sobre el efecto del peso y el crecimiento de los polluelos y de los movimientos de las crías sobre la supervivencia de las nidadas. Para evaluar estos tópicos, monitoreamos los patrones de crecimiento de polluelos, el movimiento diario de las crías, y la sobrevivencia de Calidris mauri en el Delta Yukon-Kuskokwim, Alaska. Determinamos el efecto de la edad, el peso y la fecha de eclosión de los polluelos sobre la supervivencia de la nidada utilizando el programa MARK. Mapeamos la localización de las crías diariamente, y comparamos los patrones de movimientos entre nidadas exitosas y no exitosas. Los polluelos más jóvenes tuvieron tasas de supervivencia menores y se movieron distancias más cortas que los polluelos de más edad. La probabilidad general de que uno o más polluelos de una nidada sobreviviera hasta 15 días de edad fue 0.73 ± 0.05 EE. La supervivencia de las nidadas disminuyó estacionalmente y las nidadas con polluelos de mayor peso tuvieron tasas de supervivencia mayores que las nidadas con polluelos más livianos. En promedio, las nidadas exitosas produjeron 1.7 ± 0.1 EE polluelos. La tasa de crecimiento de los polluelos fue intermedia con respecto a las aves playeras que se reproducen en el ártico y las que lo hacen en zonas templadas. El peso de los polluelos al momento de eclosionar disminuyó estacionalmente. La supervivencia de las nidadas de C. mauri fue mínima cuando los polluelos eran jóvenes, estaban agrupados y no eran capaces de mantener la homeotermia, probablemente debido a que los polluelos jóvenes eran más vulnerables a eventos de depredación completa y al clima extremo. Nuestros datos sugieren que los polluelos más grandes y de mayor edad son capaces de evitar a los depredadores al encontrarse espacialmente dispersos y ser altamente móviles; la independencia térmica que es alcanzada aproximadamente luego del día cinco permite a los polluelos soportar periodos prolongados de frío y de baja disponibilidad de alimento.

Apparent Survival Rates of Western Sandpiper (Calidris mauri) Wintering in Northwest Baja California, Mexico

The Auk ◽  
2003 ◽  
Vol 120 (1) ◽  
pp. 55-61
Author(s):  
Horacio de la Cueva ◽  
Nils Warnock ◽  
David B. Lank
Keyword(s):  
Baja California ◽  
Survival Rates ◽  
Apparent Survival ◽  
Calidris Mauri ◽  
Western Sandpiper

Bioaccumulation of organochlorine pesticides in the Western Sandpiper (Calidris mauri) during the wintering season in Sinaloa, Mexico

2020 ◽  
Vol 192 (7) ◽  
Author(s):  
Edgar Cruz-Acevedo ◽  
Miguel Betancourt-Lozano ◽  
José Alfredo Castillo-Guerrero ◽  
Guillermo Fernández
Keyword(s):  
Organochlorine Pesticides ◽  
Calidris Mauri ◽  
Western Sandpiper

Phenotypic Flexibility of Body Composition in Relation to Migratory State, Age, and Sex in the Western Sandpiper (Calidris mauri)

2003 ◽  
Vol 76 (1) ◽  
pp. 84-98 ◽  
Author(s):  
Christopher G. Guglielmo ◽  
Tony D. Williams
Keyword(s):  
Body Composition ◽  
Phenotypic Flexibility ◽  
Calidris Mauri ◽  
Western Sandpiper ◽  
Age And Sex

Western Sandpiper (Calidris mauri)

2014 ◽  
Author(s):  
Samantha Franks ◽  
David B. Lank ◽  
W. Herbert Wilson Jr.
Keyword(s):  
Calidris Mauri ◽  
Western Sandpiper

scholarly journals Genetic Parentage and Mate Guarding in the Arctic-Breeding Western Sandpiper

The Auk ◽  
2002 ◽  
Vol 119 (1) ◽  
pp. 228-233 ◽  
Author(s):  
Donald Blomqvist ◽  
Bart Kempenaers ◽  
Richard B. Lanctot ◽  
Brett K. Sandercock
Keyword(s):  
Paternal Care ◽  
Mate Guarding ◽  
The Arctic ◽  
Calidris Mauri ◽  
Extrapair Paternity ◽  
Western Sandpiper ◽  
Socially Monogamous ◽  
Divorce Rates ◽  
Western Sandpipers ◽  
Male Mate

Abstract Extrapair copulations and fertilizations are common among birds, especially in passerines. So far, however, few studies have examined genetic mating systems in socially monogamous shorebirds. Here, we examine parentage in the Western Sandpiper (Calidris mauri). Given that Western Sandpipers nest at high densities on the Arctic tundra, have separate nesting and feeding areas, and show high divorce rates between years, we expected extrapair paternity to be more common in this species compared to other monogamous shorebirds. However, DNA fingerprinting of 98 chicks from 40 families revealed that only 8% of broods contained young sired by extrapair males, and that 5% of all chicks were extrapair. All chicks were the genetic offspring of their social mothers. We found that males followed females more often than the reverse. Also, cuckolded males were separated from their mates for longer than those that did not lose paternity. Although these results suggest a role for male mate guarding, we propose that high potential costs in terms of reduced paternal care likely constrain female Western Sandpipers from seeking extrapair copulations.

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