Density but not climate affects the population growth rate of guanacos (Lama guanicoe) (Artiodactyla, Camelidae)

We analyzed the effects of population density and climatic variables on the rate of population growth in the guanaco (Lama guanicoe), a wild camelid species in South America. We used a time series of 36 years (1977-2012) of population sampling in Tierra del Fuego, Chile. Individuals were grouped in...

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Autores principales: Zubillaga, María, Skewes, O., Soto, N., Rabinovich, Jorge Eduardo
Formato: Articulo
Lenguaje:Inglés
Publicado: 2014
Materias:
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/85147
Aporte de:
id I19-R120-10915-85147
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Naturales
Camelidae
Climatic variables
Density effects
Guanaco
Population regulation
Population growth rate
spellingShingle Ciencias Naturales
Camelidae
Climatic variables
Density effects
Guanaco
Population regulation
Population growth rate
Zubillaga, María
Skewes, O.
Soto, N.
Rabinovich, Jorge Eduardo
Density but not climate affects the population growth rate of guanacos (Lama guanicoe) (Artiodactyla, Camelidae)
topic_facet Ciencias Naturales
Camelidae
Climatic variables
Density effects
Guanaco
Population regulation
Population growth rate
description We analyzed the effects of population density and climatic variables on the rate of population growth in the guanaco (Lama guanicoe), a wild camelid species in South America. We used a time series of 36 years (1977-2012) of population sampling in Tierra del Fuego, Chile. Individuals were grouped in three age-classes: newborns, juveniles, and adults; for each year a female population transition matrix was constructed, and the population growth rate (Λ) was estimated for each year as the matrix highest positive eigenvalue. We applied a regression analysis with finite population growth rate (Λ) as dependent variable, and total guanaco population, sheep population, annual mean precipitation, and winter mean temperature as independent variables, with and without time lags. The effect of population size was statistically significant, but the effects of the sheep population and the climatic variables on guanaco population growth rate were not statistically significant.
format Articulo
Articulo
author Zubillaga, María
Skewes, O.
Soto, N.
Rabinovich, Jorge Eduardo
author_facet Zubillaga, María
Skewes, O.
Soto, N.
Rabinovich, Jorge Eduardo
author_sort Zubillaga, María
title Density but not climate affects the population growth rate of guanacos (Lama guanicoe) (Artiodactyla, Camelidae)
title_short Density but not climate affects the population growth rate of guanacos (Lama guanicoe) (Artiodactyla, Camelidae)
title_full Density but not climate affects the population growth rate of guanacos (Lama guanicoe) (Artiodactyla, Camelidae)
title_fullStr Density but not climate affects the population growth rate of guanacos (Lama guanicoe) (Artiodactyla, Camelidae)
title_full_unstemmed Density but not climate affects the population growth rate of guanacos (Lama guanicoe) (Artiodactyla, Camelidae)
title_sort density but not climate affects the population growth rate of guanacos (lama guanicoe) (artiodactyla, camelidae)
publishDate 2014
url http://sedici.unlp.edu.ar/handle/10915/85147
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