https://www.socictopen.socict.org/items/show/19888
title: Effects of livestock on the feeding ecology of endemic culpeo foxes (Pseudalopex culpaeus smithersi) in central Argentina Efectos del ganado sobre la ecología trófica del zorro culpeo (Pseudalopex culpaeus smithersi) (Carnivora: Canidae) endémico del centro de Argentina
subject: Pseudalopex culpaeus smithersi, culpeo, disponibilidad de presas, efectos del ganado, livestock effects, prey availability, prey selection, selección de presas
description: Livestock can affect the feeding ecology of carnivores either directly, by becoming potential prey, or indirectly, by modifying selection of other prey. Selection of other prey is modified through the negative effects of livestock on food and cover, which reduces density and increases vulnerability of wild prey. Pseudalopex culpaeus smithersi is an endemic subspecies of culpeo fox of central Argentina that is persecuted due to predation on livestock. We studied the direct and indirect effects of livestock on P. c. smithersi's feeding ecology by evaluating its diet, prey availability, and prey selection in two areas with different livestock abundance-a national park and an adjacent sheep and cattle ranch in the Achala grassland plateau. We studied diets from feces and used conversion coefficients to estimate prey numbers and biomass consumed. Culpeos preyed primarily on native rodents (cavies and cricetines) according to both prey numbers and biomass. The differences in culpeo diet, prey availability, and prey selection between sites were strongly associated with effects of livestock. Culpeos consumed more livestock carrion and birds at the ranch, and tucos (Ctenomys sp.) only at the park. Livestock density was high at the ranch and low at the park, cricetine and tuco densities were significantly higher at the park, and European hare (Lepus europaeus) densities were similar between sites. According to prey numbers consumed culpeos did not appear to be selective, but according to biomass they consumed cricetines more and hares less than expected at both sites and sheep more than expected at the park. Livestock may reduce densities and increase vulnerabilities of cricetines and fossorial tucos in Achala by soil trampling that destroys burrows, competition for forage, and reduction of grass coverEl ganado puede afectar la ecología trófica de los carnívoros en forma directa, siendo una presa potencial, e indirecta, modificando la selección de otras presas. La selección d…
creator: MÓNICA V. PIA, MARÍA S. LÓPEZ, ANDRÉS J. NOVARO
source: Revista Chilena de Historia Natural
publisher: BMC
date: 2003
relation: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2003000200015
coverage: Botany, Zoology