Breeding sites and winter site fidelity of Piping Plovers wintering in The Bahamas, a previously unknown major wintering area

被引:14
|
作者
Gratto-Trevor, Cheri [1 ]
Haig, Susan M. [2 ]
Miller, Mark P. [2 ]
Mullins, Thomas D. [2 ]
Maddock, Sidney [3 ]
Roche, Erin [4 ]
Moore, Predensa [5 ]
机构
[1] Environm Canada, Prairie & No Wildlife Res Ctr, Wildlife & Landscape Sci Directorate, Sci & Technol Branch, 115 Perimeter Rd, Saskatoon, SK S7N 0X4, Canada
[2] US Geol Survey, Forest & Rangeland Ecosyst Sci Ctr, 3200 SW Jefferson Way, Corvallis, OR 97331 USA
[3] POB 1359, Buxton, NC 27920 USA
[4] US Geol Survey, Prairie & No Wildlife Res Ctr, Jamestown, ND 58401 USA
[5] Bahamas Natl Trust, POB N-4105,Village Rd, The Retreat, New Providence, Bahamas
关键词
Charadriidae; endangered species; shorebirds; site fidelity; survival; CHARADRIUS-MELODUS; SURVIVAL; SHOREBIRD; ABUNDANCE; PROGRAM; MODELS;
D O I
10.1111/jofo.12131
中图分类号
Q95 [动物学];
学科分类号
071002 ;
摘要
Most of the known wintering areas of Piping Plovers (Charadrius melodus) are along the Atlantic and Gulf coasts of the United States and into Mexico, and in the Caribbean. However, 1066 threatened/endangered Piping Plovers were recently found wintering in The Bahamas, an area not previously known to be important for the species. Although representing about 27% of the birds counted during the 2011 International Piping Plover Winter Census, the location of their breeding site(s) was unknown. Thus, our objectives were to determine the location(s) of their breeding site(s) using molecular markers and by tracking banded individuals, identify spring and fall staging sites, and examine site fidelity and survival. We captured and color-banded 57 birds in January and February 2010 in The Bahamas. Blood samples were also collected for genetic evaluation of the likely subspecies wintering in The Bahamas. Band re-sightings and DNA analysis revealed that at least 95% of the Piping Plovers wintering in The Bahamas originated on the Atlantic coast of the United States and Canada. Re-sightings of birds banded in The Bahamas spanned the breeding distribution of the species along the Atlantic coast from Newfoundland to North Carolina. Site fidelity to breeding and wintering sites was high (88-100%). Spring and fall staging sites were located along the Atlantic coast of the United States, with marked birds concentrating in the Carolinas. Our estimate of true survival for the marked birds was 0.71 (95% CI: 0.61-0.80). Our results indicate that more than one third of the Piping Plover population that breeds along the Atlantic coast winters in The Bahamas. By determining the importance of The Bahamas to the Atlantic subspecies of Piping Plovers, future conservation efforts for these populations can be better focused on where they are most needed. RESUMEN Los sitios de cria y la fidelidad al sitio de invernada de Charadrius melodus en las Bahamas, anteriormente desconocido como un sitio importante para la invernada La mayor parte de las areas de invernada conocidas del chorlito, Charadrius melodus, estan a lo largo de las costas de los Estados Unidos Atlantico y del Golfo en Mexico, y en el Caribe. Sin embargo, 1066 chorlitos, que estan amenazadas o en peligro de extincion, se encontraron recientemente invernada en las Bahamas, un area que anteriormente no se ha conocido a ser importante para la especie. Aunque se representa alrededor del 27% de las aves contadas durante el Invierno Internacional de Chorlitos 2011, la ubicacion(es) de reproduccion era desconocido. Por lo tanto, nuestros objetivos fueron a determinar la ubicacion(es) de su sitio(s) de cria utilizando marcadores moleculares y el monitoreo de individuos anillados, tambien a identificar los sitios de parada en la primavera y el otono, y examinar la fidelidad al sitio y la supervivencia. Capturamos y anillamos con colores 57 aves en las Bahamas en enero y febrero de 2010. Las muestras de sangre tambien se recogieron para la evaluacion genetica de los posibles subespecies pasando el invierno en las Bahamas. Re-avistamientos y analisis de ADN revelo que al menos el 95% de los chorlitos de invernada en las Bahamas se origino en la costa atlantica de los Estados Unidos y Canada. Re-avistamientos de aves anilladas en las Bahamas abarcaron la distribucion de cria de la especie a lo largo de la costa atlantica de Terranova, Canada a Carolina del Norte. Fidelidad al los sitios de reproduccion e invernada fue alta (88-100%). Sitios de parada en la primavera y en el otono se encuentran a lo largo de la costa atlantica de los Estados Unidos, con las aves marcadas concentrandose en las Carolinas. Nuestra estimacion de la supervivencia real de las aves marcadas era 0.71 (IC del 95%: 0.61 hasta 0.80). Nuestros resultados indican que mas de un tercio de la poblacion Charadrius melodus que se reproduce a lo largo de la costa atlantica pasan los inviernos en las Bahamas. Al determinar la importancia de las Bahamas a la subespecie atlantica de Charadrius melodus, esfuerzos de conservacion para estas poblaciones en el futuro pueden ser centrado mejor en donde mas se necesitan.
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页码:29 / 41
页数:13
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