Estacionalidad de la superposición espacial entre el pingüino de Humboldt (spheniscus humboldti) y de Magallanes (spheniscus magellanicus) en la bahía de Valparaíso
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Fecha
2011
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es
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Universidad Andrés Bello
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Licencia CC
Licencia CC
Resumen
Se analizó la estacionalidad de la superposición entre los pingüinos de Humboldt
(Spheniscus humboldti) y de Magallanes (Spheniscus magellanicus) y las asociaciones de
estos con otras aves marinas entre julio del 2006 y julio del 2009 en la bahía de Valparaíso.
Para esta investigación se utilizó el método de conteo de transecto lineal modificado para
embarcaciones. La superposición de especies fue estacional donde S. magellanicus no se
encuentra en la zona durante el verano dada su migración a la zona sur austral de Chile (zona
de nidificación de la especie) mientras que S. humboldti permanece debido a que sus colonias
reproductivas se encuentran en la zona de estudio. S. magellanicus se asocia con un número
mayor de especies de aves marinas, al igual que adultos y juveniles entre sí, respecto a S.
humboldti. No se observó asociación entre S. magellanicus y S. humboldti, quienes se
segregarían posiblemente para evitar interacción y competencia por interferencia
Seasonality of the overlap between Humboldt (Spheniscus humboldti) and Magellanic penguins (Spheniscus magellanicus), and the associations between them and other seabirds, were analyzed between july of 2006 and july of 2009 at Valparaiso bay. We used for this research the method of linear transect modified for vessels. The overlap of this species was seasonal, were S. magellanicus is not in the area during summer due to the migration of this penguin to the south zone of Chile (nesting area of this specie). S. humboldti Stays on the zone as this is the nesting area of this species. S. magellanicus associates with a larger number of marine birds, same as adults and juveniles between them respect to S. humboldti. No mixed groups of S. magellanicus and S. humboldtii. Were observed during the study presumably they segregate so as to avoid interaction and interference competition.
Seasonality of the overlap between Humboldt (Spheniscus humboldti) and Magellanic penguins (Spheniscus magellanicus), and the associations between them and other seabirds, were analyzed between july of 2006 and july of 2009 at Valparaiso bay. We used for this research the method of linear transect modified for vessels. The overlap of this species was seasonal, were S. magellanicus is not in the area during summer due to the migration of this penguin to the south zone of Chile (nesting area of this specie). S. humboldti Stays on the zone as this is the nesting area of this species. S. magellanicus associates with a larger number of marine birds, same as adults and juveniles between them respect to S. humboldti. No mixed groups of S. magellanicus and S. humboldtii. Were observed during the study presumably they segregate so as to avoid interaction and interference competition.
Notas
Tesis (Magíster en Biología Marina)
Palabras clave
Aves Marinas, Pingüinos, Chile, Magallanes, Valparaíso, Migración de Aves