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| Díaz,Soledad. |
| La Cachaña (Enicognathus ferrugineus) es el psittácido de distribución más austral del mundo. Endémica de los bosques andino-patagónicos, se encuentra a ambos lados de la Cordillera de los Andes. No presenta dimorfismo sexual ni etario. Maximiza la ingesta de alimentos altamente nutricionales (flores y semillas) a medida que se hacen disponibles, realizando un seguimiento altitudinal de los cambios fenológicos de uno de sus alimentos principales: Nothofagus pumilio. En la época pre-reproductiva consume proteínas en forma de polen y larvas, alimentos poco frecuentes en la dieta de los psittácidos. La digestibilidad de polen es la más alta registrada hasta el momento, sugiriendo su importancia en un ambiente marcadamente estacional con inviernos pobres en... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bosque Templado Austral; Dieta; Enicognathus ferrugineus; Patagonia; Reproducción. |
| Ano: 2012 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0073-34072012000100003 |
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| SHEPHERD,JOHN D; DITGEN,REBECCA S; SANGUINETTI,JAVIER. |
| Pre-dispersal seed predation by Austral parakeets, Enicognathus ferrugineus, on pehuén, Araucaria araucana, was studied to assess the relationship between predation and seed production. We collected falling seeds in four araucaria forests of southwestern Neuquén Province, Argentina during four years that included both mast and intermast years. Predation rates were negatively correlated with seed production. When seed production was high, predation rates ranged from 0.6 to 3.3 %; when it was low, predation rates ranged from 13.0 to 20.6 %. Years differed in the pattern of monthly seed fall with peak seed fall in March 2002 and April 2003. Predation rates were lower and more uniform in the year of higher seed production, but did not differ between sites. In... |
| Tipo: Journal article |
Palavras-chave: Pre-dispersal seed predation; Masting; Araucaria araucana; Enicognathus ferrugineus. |
| Ano: 2008 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2008000300008 |
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