INVESTIGADORES
NOVARO andres Jose
artículos
Título:
Effects of live-shearing on population parameters and movement in sedentary and migratory populations of guanacos Lama guanicoe
Autor/es:
CARMANCHAHAI, P.D.; SCHROEDER, N.; BOLGERI, M. J.; WALKER, R. S.; FUNES, M.C.; BERG, J.; TARABORELLI, P.; OVEJERO, R.; GREGORIO, P.; MORENO, P.; NOVARO, A. J.
Revista:
ORYX
Editorial:
CAMBRIDGE UNIV PRESS
Referencias:
Lugar: Cambridge; Año: 2014 vol. 49 p. 51 - 59
ISSN:
0030-6053
Resumen:
Live-shearing of wild guanacos Lama guanicoe
may affect their reproductive success and population
resilience, and therefore it is important to assess the
biological sustainability of obtaining their wool. We
evaluated effects of capture and shearing on survival and
reproduction, population parameters, daily movements,
ranging behaviour and spatial distribution in sedentary and
migratory populations. We assessed population variables by
radio-telemetry and line-transect surveys before and after
capture. We estimated high post-shearing survival rates in
both populations and similar yearling production in shorn
and non-shorn females in the migratory population. We did
not find significant variations in density and population
structure before and after shearing in the sedentary
population, whereas in the migratory population density
decreased and the population structure changed significantly
after assembly of the capture structure, returning
to pre-assembly levels 1 month later. The mean daily
distance moved by radio-collared guanacos during the first
2 days after shearing was three times longer than during the
following 30 days. There was a 25% decrease in the mean
home-range size of shorn guanacos between the first and
second month after shearing but this decline appeared to
be associated with a seasonal change in movement, because
a similar reduction occurred during the same period
the following year, when the guanacos were not shorn.
Live-shearing modified the spatial distribution pattern in
the sedentary population but did not have a significant effect
on the migratory population.Management of guanacos may
contribute towards developing a biologically sustainable
economic activity that promotes conservation of wildlife
and habitats.