Abstract

Although breeding populations of Piping Plovers are well studied, their winter distribution is less clear. We studied the seasonal abundance of nonbreeding Piping Plovers (Charadrius melodus) during the winters of 2003–2004 and 2004–2005 on Little St. Simons Island (LSSI), Georgia. Our objectives were to determine the relative abundance of individuals from three breeding populations at LSSI, and identify possible differences among populations in arrival time, winter movements, or departure time. We observed up to 100 Piping Plovers during peak migration, and approximately 40 plovers wintered at LSSI. From July 2004 to May 2005, approximately 20% of the Great Lakes breeding population used LSSI. Plovers were not present at LSSI during June. All breeding populations of Piping Plovers had similar patterns of temporal occurrence on LSSI, suggesting no need for population-specific management plans at this site. Our results suggest that LSSI is among the most important wintering sites on the Atlantic coast for Piping Plovers, especially for individuals from the endangered Great Lakes population. SINOPSIS Aunque las poblaciones reproductivas del chorlitejo picocorto (Charadrius melodus) son bien estudiadas, la distribucion invernal de esta especie es relativamente poco conocida. Estudiamos la abundancia estacional de Charadrius melodus durante los inviernos del 2003–2004 y 2004–2005 en Little St. Simons Island (LSSI) en Georgia. Nuestros objetivos fueron determinar la abundancia relativa de individuos de tres poblaciones reproductivas en LSSI e identificar las posibles diferencias entre poblaciones en fecha de llegada, movimientos durante el invierno, y fecha de salida. Observamos hasta 100 individuos de Charadrius melodus durante el pico de migracion y aproximadamente 40 individuos pasaron el invierno en LSSI. Desde Julio 2004 hasta Mayo 2005, aproximadamente 20% de la poblacion reproductiva “Great Lakes” utilizo LSSI. La especie no estuvo presente en LSSI en Junio. Todas las poblaciones reproductivas de esta especie tuvieron similares patrones temporales de ocurrencia en LSSI, cual es una posible indicacion de que este sitio no requiere de planes de manejo especificas a una poblacion. Nuestros resultados indican que LSSI es uno de los sitios mas importantes para esta especie en la costa Atlantica durante el invierno, especialmente para individuos de la poblacion “Great Lakes”, cual esta en peligro de extincion.

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