Bibliographic Details
| Title: |
COMPARISON OF BREEDING AND POSTBREEDING MOVEMENTS AND HABITAT REQUIREMENTS FOR THE SCARLET TANAGER (PIRANGA OLIVACEA) IN VIRGINIA. |
| Authors: |
Vega Rivera, J. H., McShea, W. J., Rappole, J. H., Hackett, S. J. |
| Source: |
Auk (American Ornithologists Union). Jul2003, Vol. 120 Issue 3, p632-644. 13p. 2 Diagrams, 3 Charts, 1 Graph. |
| Subjects: |
Scarlet tanager, Bird behavior, Bird breeding, Habitats |
| Geographic Terms: |
Virginia, United States |
| Abstract (English): |
We investigated movements and habitat use during breeding and postbreeding periods in Scarlet Tanagers (Piranga olivacea) during June-September 1998 in northern Virginia deciduous forest. Nine birds (8 males and 1 female) remained on the same home range during both breeding and postbreeding periods, whereas 11 birds (9 males and 2 females) shifted home range (>300 m) between periods. Breeding season home-range size ranged from 2.6 to 5.6 ha (95% kernel), and core area from 0.61 to 0.93 ha (50% kernel). Postbreeding home ranges were similar in size to home range during the breeding period for birds that remained in the vicinity of nesting areas, but were larger for birds that moved away from the nesting area. Scarlet Tanagers occurred in both mature and successional forest during breeding and postbreeding periods, with some indication of increased use of earlier successional stages during the postbreeding period. Needs for Scarlet Tanagers during the postbreeding period (molt, premigratory fattening) differ from those during the breeding period (pair formation, nest placement, rearing of young). Those differences provide a plausible explanation that all tanagers changed focal areas between breeding and postbreeding periods. These findings confirm the need for taking the postbreeding period into account, both for understanding migrant life history and successful conservation. [ABSTRACT FROM AUTHOR] |
| Abstract (Spanish): |
De junio a septiembre de 1998 estudiamos los movimientos y el uso del hbitat de Piranga olivacea durante los periodos reproductivo y post-reproductivo, en los bosques caducifolios del norte de Virginia. Nueve individuos (ocho machos y una hembra) permanecieron en el mismo mbito hogareo durante ambos periodos, mientas que 11 individuos (nueve machos y dos hembras) cambiaron de mbito hogareo (>300 m) entre periodos. El mbito hogareo durante el periodo reproductivo vari entre 2.6-5.6 ha (95% kernel), y el rea ncleo vari de 0.61-0.93 ha (50% kernel). Los mbitos hogareos durante el periodo reproductivo fueron similares en tamao a los del perodo post-reproductivo en individuos que permanecieron en la vecindad de los sitios de anidacin, pero fueron mayores en aquellos individuos que se movieron fuera de los sitios de anidacin. P. olivacea ocurri en bosques maduros y sucesionales durante ambos periodos reproductivo y post-reproductivo, aunque la tendencia al uso de estadios sucesionales se increment en el periodo post-reproductivo. Las necesidades de P. olivacea durante el periodo reproductivo (muda, acumulacin pre-migratoria de grasa) difieren de aquellas durante el perodo reproductivo (formacin de parejas, localizacin del nido, cra de los pollos). Estas diferencias proveen de una explicacin posible para el hecho que todos los individuos de P. olivacea cambiaran el rea focal entre los periodos reproductivo y post-repro-ductivo. Estos hallazgos confirman la necesidad de considerar el periodo post-reproductivo para mejorar nuestro conocimiento de la historia de vida de especies migratorias e incrementar el xito de su conservacin. [ABSTRACT FROM AUTHOR] |
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| Database: |
Psychology and Behavioral Sciences Collection |
