Biblioteca Digital de VanguardiaDiet selection by the lesser rhea (Rhea pennata pennata) in Payunia, Northern Patagonia (Mendoza, Argentina)
The lesser rhea (family Rheidae) is a flightless large bird of South America, threatened due to habitat loss, hunting and egg collecting, with special concern in Northern Patagonia. Diet and food availability were estimated throughout the year by micro-histological analysis and point-quadrat transec...
| Autores principales: | , , , |
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| Formato: | Artículo |
| Lenguaje: | Inglés |
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Universidad Nacional de Cuyo. Facultad de Ciencias Agrarias
2013
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| Acceso en línea: | http://bdigital.uncu.edu.ar/5029 |
| _version_ | 1782341127257456640 |
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| author | Puig, Silvia Cona, Mónica I. Videla, Fernando Méndez, Eduardo |
| author_facet | Puig, Silvia Cona, Mónica I. Videla, Fernando Méndez, Eduardo |
| author_sort | Puig, Silvia |
| collection | Repositorio |
| description | The lesser rhea (family Rheidae) is a
flightless large bird of South America, threatened
due to habitat loss, hunting and egg collecting,
with special concern in Northern Patagonia. Diet
and food availability were estimated throughout
the year by micro-histological analysis and
point-quadrat transects in a landscape inside
and another outside the Payunia Reserve,
the northernmost part of the Rhea pennata
pennata distribution. Significant differences
were detected by Kruskall-Wallis ANOVA,
food selection by Chi-square test and Bailey’s
confidence interval. A strong food selection
characterized the diet of lesser rheas, dominated
by leaves of shrubs and forbs, complemented by
dicot seeds and a few insects. This agrees with
the documented low dietary overlap with other
herbivores in Payunia. Dietary changes agree
with the expected from the selective quality
hypothesis. Food availability was better inside
than outside the protected area, with probable
conservation effects for lesser rheas. Seeds,
forbs and soft grasses could be for lesser rheas
some key food resources to survive during
unfavorable seasons in arid environments
without "mallines", as Payunia. Shrubby patches,
with high availability of preferred food items (tall
shrubs and forbs), stood out as key habitats.
Therefore, avoiding fire and woody plant removal
is crucial for the conservation of lesser rheas in
the northern of its range. |
| format | Artículo |
| id | uncu-5029 |
| institution | Biblioteca Digital - UNCUYO |
| language | Inglés |
| publishDate | 2013 |
| publisher | Universidad Nacional de Cuyo. Facultad de Ciencias Agrarias
|
| record_format | ojs |
| spelling | uncu-50292013-08-05T10:38:16Z Diet selection by the lesser rhea (Rhea pennata pennata) in Payunia, Northern Patagonia (Mendoza, Argentina) Selección dietaria del choique (Rhea pennata pennata) en Payunia, Patagonia Septentrional (Mendoza, Argentina) Puig, Silvia Cona, Mónica I. Videla, Fernando Méndez, Eduardo Mendoza (Argentina) Zonas áridas Alimentación Datos estadísticos Especies protegidas Ambientes áridos Disponibilidad alimentaria Ecología alimentaria Ratites Rheidae Choique Arid environments Diet composition Food availability Feeding ecology The lesser rhea (family Rheidae) is a flightless large bird of South America, threatened due to habitat loss, hunting and egg collecting, with special concern in Northern Patagonia. Diet and food availability were estimated throughout the year by micro-histological analysis and point-quadrat transects in a landscape inside and another outside the Payunia Reserve, the northernmost part of the Rhea pennata pennata distribution. Significant differences were detected by Kruskall-Wallis ANOVA, food selection by Chi-square test and Bailey’s confidence interval. A strong food selection characterized the diet of lesser rheas, dominated by leaves of shrubs and forbs, complemented by dicot seeds and a few insects. This agrees with the documented low dietary overlap with other herbivores in Payunia. Dietary changes agree with the expected from the selective quality hypothesis. Food availability was better inside than outside the protected area, with probable conservation effects for lesser rheas. Seeds, forbs and soft grasses could be for lesser rheas some key food resources to survive during unfavorable seasons in arid environments without "mallines", as Payunia. Shrubby patches, with high availability of preferred food items (tall shrubs and forbs), stood out as key habitats. Therefore, avoiding fire and woody plant removal is crucial for the conservation of lesser rheas in the northern of its range. El choique (familia Rheidae) es un ave grande no voladora de Sudamérica, amenazada por pérdida de hábitat, cacería y colecta de huevos, con especial preocupación en Patagonia Septentrional. Se estimaron dieta y disponibilidad alimentaria a lo largo del año por análisis microhistológicos y transectas point-quadrat en un paisaje dentro y otro fuera de la Reserva Payunia, al extremo norte de la distribución de Rhea pennata pennata. Diferencias significativas se detectaron por ANOVA de Kruskall-Wallis, la selección alimentaria por test de Chi-cuadrado e intervalos de confianza de Bailey. Una fuerte selección alimentaria caracterizó la dieta del choique, dominada por hojas de arbustos y hierbas, complementada por semillas de dicotiledóneas y pocos insectos. Esto concuerda con el documentado bajo solapamiento con otros herbívoros en Payunia. Los cambios dietarios concordaron con lo esperado de la hipótesis de selección por calidad. La disponibilidad alimentaria fue mejor dentro que fuera del área protegida, con probables efectos de conservación para el choique. Semillas, hierbas y pastos tiernos serían recursos clave para que el choique sobreviva en épocas desfavorables en ambientes áridos sin "mallines", como Payunia. Parches arbustivos, con alta oferta de ítems preferidos (arbustos altos y hierbas), destacaron como hábitats clave. Evitar incendios y remoción de leñosas resulta crucial para conservar el choique al norte de su distribución. de ítems preferidos (arbustos altos y hierbas), destacaron como hábitats clave. Evitar incendios y remoción de leñosas resulta crucial para conservar el choique al norte de su distribución. Fil: Puig, Silvia. Instituto Argentino de Investigaciones de las Zonas Áridas <IADIZA> Fil: Cona, Mónica I.. Instituto Argentino de Investigaciones de las Zonas Áridas <IADIZA> Fil: Videla, Fernando. Instituto Argentino de Investigaciones de las Zonas Áridas <IADIZA> Fil: Méndez, Eduardo. Instituto Argentino de Investigaciones de las Zonas Áridas. Botánica y Fitosociología <IADIZA> Universidad Nacional de Cuyo. Facultad de Ciencias Agrarias 78 Revista de la Facultad de Ciencias Agrarias Vol. 45, no. 1 Revista de la Facultad de Ciencias Agrarias, Vol. 45, no. 1 2013-06-03 eng Inglés http://bdigital.uncu.edu.ar/4945 info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar/ article info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf Universidad Nacional de Cuyo. Facultad de Ciencias Agrarias http://bdigital.uncu.edu.ar/5029 |
| spellingShingle | Mendoza (Argentina) Zonas áridas Alimentación Datos estadísticos Especies protegidas Ambientes áridos Disponibilidad alimentaria Ecología alimentaria Ratites Rheidae Choique Arid environments Diet composition Food availability Feeding ecology Puig, Silvia Cona, Mónica I. Videla, Fernando Méndez, Eduardo Diet selection by the lesser rhea (Rhea pennata pennata) in Payunia, Northern Patagonia (Mendoza, Argentina) |
| title | Diet selection by the lesser rhea (Rhea pennata pennata) in Payunia, Northern Patagonia (Mendoza, Argentina)
|
| title_full | Diet selection by the lesser rhea (Rhea pennata pennata) in Payunia, Northern Patagonia (Mendoza, Argentina)
|
| title_fullStr | Diet selection by the lesser rhea (Rhea pennata pennata) in Payunia, Northern Patagonia (Mendoza, Argentina)
|
| title_full_unstemmed | Diet selection by the lesser rhea (Rhea pennata pennata) in Payunia, Northern Patagonia (Mendoza, Argentina)
|
| title_short | Diet selection by the lesser rhea (Rhea pennata pennata) in Payunia, Northern Patagonia (Mendoza, Argentina)
|
| title_sort | diet selection by the lesser rhea (rhea pennata pennata) in payunia, northern patagonia (mendoza, argentina) |
| topic | Mendoza (Argentina) Zonas áridas Alimentación Datos estadísticos Especies protegidas Ambientes áridos Disponibilidad alimentaria Ecología alimentaria Ratites Rheidae Choique Arid environments Diet composition Food availability Feeding ecology |
| url | http://bdigital.uncu.edu.ar/5029 |