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'''V Congreso de Mastozoologia en Bolivia''', 18-20 de Mayo de 2011, La Paz, Bolivia | '''V Congreso de Mastozoologia en Bolivia''', 18-20 de Mayo de 2011, La Paz, Bolivia | ||
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== '''Food habits and impact of rooting behaviour of the invasive wild boar, Sus scrofa, in a protected area of the Monte Desert, Argentina''' == | == '''Food habits and impact of rooting behaviour of the invasive wild boar, Sus scrofa, in a protected area of the Monte Desert, Argentina''' == | ||
- | The wild boar, ''Sus scrofa'', was introduced in the central region of Argentina in the early 20th century. A small feral population invaded the western area of the Man and Biosphere Reserve of Ñacuñán, Argentina in the early 1980’s. The purpose of our study was to provide information about the diet of wild boars in the semiarid region of Argentina and assess their potential effect on vegetation through soil rooting. We analyzed 41 faecal samples and compared cover plant composition between rooted and non rooted soil. Our results showed that 95% of the diet consisted of different parts (leaves, stems, glumes, fruits, seeds, and bulbs) of 36 plant species, while arthropods and animal tissue represented only 5% of the diet. Two plant species (''Sphaeralcea miniata'' and ''Pitraea cuneato-ovata'') composed the bulk of the diet, representing almost 50% of the total items found in the faeces. Plant cover was significantly different between rooted and non rooted areas. Rooted areas were dominated by ''Pitraea cuneato-ovata'', whereas the cover of ''Lycium'' sp was higher in non rooted areas. This is the first study addressing the ecology of the wild boar in a protected area of the Monte Desert biome of Argentina. | + | The wild boar, ''Sus scrofa'', was introduced in the central region of Argentina in the early 20th century. A small feral population invaded the western area of the Man and Biosphere Reserve of Ñacuñán, Argentina in the early 1980’s. The purpose of our study was to provide information about the diet of wild boars in the semiarid region of Argentina and assess their potential effect on vegetation through soil rooting. We analyzed 41 faecal samples and compared cover plant composition between rooted and non rooted soil. Our results showed that 95% of the diet consisted of different parts (leaves, stems, glumes, fruits, seeds, and bulbs) of 36 plant species, while arthropods and animal tissue represented only 5% of the diet. Two plant species (''Sphaeralcea miniata'' and ''Pitraea cuneato-ovata'') composed the bulk of the diet, representing almost 50% of the total items found in the faeces. Plant cover was significantly different between rooted and non rooted areas. Rooted areas were dominated by ''Pitraea cuneato-ovata'', whereas the cover of ''Lycium'' sp was higher in non rooted areas. This is the first study addressing the ecology of the wild boar in a protected area of the Monte Desert biome of Argentina. María Fernanda Cuevas, Agustina Novillo, Claudia Campos, Maria Ana Dacar and Ricardo A. Ojeda, JAE in press; partly financed by ALARM (EU)- CONICET and SECYT (Argentina) |
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Revisión de 09:18 18 jun 2010
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Darwin y sus reflecciones sobre las especies exóticas “. . . few countries have undergone more remarkable changes since the year 1535, when the first colonist of La Plata landed with seventy-two horses. The countless herds of horses, cattle, and sheep, have altered the whole aspect of the vegetation, but they have almost banished the guanaco, deer, and ostrich. Numberless other changes must likewise have taken place; the wild pig in some parts probably replaces the pecarri; packs of wild dogs may be heard howling on the wooded banks of the less frequented stream; and the common cat, altered into a large and fierce animal, inhabits rocky hills….” Charles Darwin, The Voyage of the Beagle, entry for September 19th, 1833 |
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