Effects of livestock on the feeding ecology of endemic culpeo foxes (Pseudalopex culpaeus smithersi) in central Argentina

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...

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Autores principales:	PIA,MÓNICA V., LÓPEZ,MARÍA S., NOVARO,ANDRÉS J.
Lenguaje:	English
Publicado:	Sociedad de Biología de Chile 2003
Materias:	culpeo livestock effects prey selection prey availability Pseudalopex culpaeus smithersi
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2003000200015
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spelling	oai:scielo:S0716-078X20030002000152003-10-09Effects of livestock on the feeding ecology of endemic culpeo foxes (Pseudalopex culpaeus smithersi) in central ArgentinaPIA,MÓNICA V.LÓPEZ,MARÍA S.NOVARO,ANDRÉS J. culpeo livestock effects prey selection prey availability Pseudalopex culpaeus smithersi 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 coverinfo:eu-repo/semantics/openAccessSociedad de Biología de ChileRevista chilena de historia natural v.76 n.2 20032003-06-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2003000200015en10.4067/S0716-078X2003000200015
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	culpeo livestock effects prey selection prey availability Pseudalopex culpaeus smithersi
spellingShingle	culpeo livestock effects prey selection prey availability Pseudalopex culpaeus smithersi PIA,MÓNICA V. LÓPEZ,MARÍA S. NOVARO,ANDRÉS J. Effects of livestock on the feeding ecology of endemic culpeo foxes (Pseudalopex culpaeus smithersi) in central Argentina
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 cover
author	PIA,MÓNICA V. LÓPEZ,MARÍA S. NOVARO,ANDRÉS J.
author_facet	PIA,MÓNICA V. LÓPEZ,MARÍA S. NOVARO,ANDRÉS J.
author_sort	PIA,MÓNICA V.
title	Effects of livestock on the feeding ecology of endemic culpeo foxes (Pseudalopex culpaeus smithersi) in central Argentina
title_short	Effects of livestock on the feeding ecology of endemic culpeo foxes (Pseudalopex culpaeus smithersi) in central Argentina
title_full	Effects of livestock on the feeding ecology of endemic culpeo foxes (Pseudalopex culpaeus smithersi) in central Argentina
title_fullStr	Effects of livestock on the feeding ecology of endemic culpeo foxes (Pseudalopex culpaeus smithersi) in central Argentina
title_full_unstemmed	Effects of livestock on the feeding ecology of endemic culpeo foxes (Pseudalopex culpaeus smithersi) in central Argentina
title_sort	effects of livestock on the feeding ecology of endemic culpeo foxes (pseudalopex culpaeus smithersi) in central argentina
publisher	Sociedad de Biología de Chile
publishDate	2003
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2003000200015
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Effects of livestock on the feeding ecology of endemic culpeo foxes (Pseudalopex culpaeus smithersi) in central Argentina

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