Repositorio Institucional
Repositorio Institucional
CONICET Digital
  • Inicio
  • EXPLORAR
    • AUTORES
    • DISCIPLINAS
    • COMUNIDADES
  • Estadísticas
  • Novedades
    • Noticias
    • Boletines
  • Ayuda
    • General
    • Datos de investigación
  • Acerca de
    • CONICET Digital
    • Equipo
    • Red Federal
  • Contacto
JavaScript is disabled for your browser. Some features of this site may not work without it.
  • INFORMACIÓN GENERAL
  • RESUMEN
  • ESTADISTICAS
 
Artículo

Seasonal diet of vicuñas in the Los Andes protected area (Salta, Argentina): Are they optimal foragers?

Mosca Torres, Maria EugeniaIcon ; Puig, SilviaIcon
Fecha de publicación: 04/2010
Editorial: Academic Press Ltd - Elsevier Science Ltd
Revista: Journal of Arid Environments
ISSN: 0140-1963
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Otras Ciencias Biológicas

Resumen

Optimal foraging theory states that individuals focus on the most profitable items when resources are abundant, and expand their diet when food availability decreases. In polygynous ungulates, territoriality and reproduction can strongly affect this foraging strategy. Vicuñas (Vicugna vicugna) are an interesting model system to test these hypotheses, because they present a stable social structure with territorial and non-territorial animals, and survive in arid environments where plant cover and quality are low. We assessed food availability (point-quadrat method) and diet composition (faecal analysis) of vicuñas to analyze whether they are optimal foragers and whether territoriality and reproduction affect their foraging strategy during summer and winter in the Argentinean Puna. Differences in food availability and diet composition between seasons and groups were addressed by Wilcoxon Rank Sum test. The χ2 goodness-of-fit test and Bailey's index allowed detection of food selectivity. Vicuñas focused their summer diet on high-quality species and increased the number of species eaten in winter, as predicted by the optimal foraging theory. Seasonal patterns were more evident in the territory, where females compensate for high energy costs of reproduction, whereas the lower energy requirements of non-territorial vicuñas would explain the lower dietary proportions of nutritive species in their diet.
Palabras clave: Arid Environments , Optimal Foraging Theory , Territoriality , Vicugna Vicugna
Ver el registro completo
 
Archivos asociados
Thumbnail
 
Tamaño: 240.8Kb
Formato: PDF
.
Descargar
Licencia
info:eu-repo/semantics/openAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)
Identificadores
URI: http://hdl.handle.net/11336/75590
DOI: http://dx.doi.org/10.1016/j.jaridenv.2009.10.002
URL: https://www.sciencedirect.com/science/article/pii/S0140196309003152
Colecciones
Articulos(IADIZA)
Articulos de INST. ARG DE INVEST. DE LAS ZONAS ARIDAS
Citación
Mosca Torres, Maria Eugenia; Puig, Silvia; Seasonal diet of vicuñas in the Los Andes protected area (Salta, Argentina): Are they optimal foragers?; Academic Press Ltd - Elsevier Science Ltd; Journal of Arid Environments; 74; 4; 4-2010; 450-457
Compartir
Altmétricas
 

Enviar por e-mail
Separar cada destinatario (hasta 5) con punto y coma.
  • Facebook
  • X Conicet Digital
  • Instagram
  • YouTube
  • Sound Cloud
  • LinkedIn

Los contenidos del CONICET están licenciados bajo Creative Commons Reconocimiento 2.5 Argentina License

https://www.conicet.gov.ar/ - CONICET

Inicio

Explorar

  • Autores
  • Disciplinas
  • Comunidades

Estadísticas

Novedades

  • Noticias
  • Boletines

Ayuda

Acerca de

  • CONICET Digital
  • Equipo
  • Red Federal

Contacto

Godoy Cruz 2290 (C1425FQB) CABA – República Argentina – Tel: +5411 4899-5400 repositorio@conicet.gov.ar
TÉRMINOS Y CONDICIONES