INVESTIGADORES
TRAVAINI Alejandro
artículos
Título:
Failure to estimate reliable sex ratios of guanaco from road-survey data
Autor/es:
JULIETA PEDRANA; ALEJANDRO RODRIGUEZ; JAVIER BUSTAMANTE; ALEJANDRO TRAVAINI; JUAN IGNACIO ZANÓN
Revista:
CANADIAN JOURNAL OF ZOOLOGY
Editorial:
NRC Research Press
Referencias:
Año: 2009 vol. 87 p. 886 - 894
ISSN:
0008-4301
Resumen:
The guanaco (Lama guanicos (Muller, 1776)) is a monomorphic polygynous mammal whose adult sex ratio is expected to be balanced or biased towrds females. Remarkably male-biased sex ratios of adult guanacos are often estimated from road surveys. We analyzed the distribution of guanaco social groups recorded during road surveys in Patagonia, Argentina, to test the hypothesis that group assignation based upon behavioral traits is not unequivocal and can be biased by survey factors.
