Javier Barrio | Centro de Ornitología y Biodiversidad (original) (raw)
Papers by Javier Barrio
Cotinga, 2008
Explains the records of the Tiger heron in the western side of Andean Peru.
Journal of Field Ornithology, 2011
ABSTRACT. Estimating the geographic range of a species can be complicated by insufficient occurre... more ABSTRACT. Estimating the geographic range of a species can be complicated by insufficient occurrence data and a lack of information about range limit determinants. Accurate estimates of species distributions are needed to assess the impacts of anthropogenic actions and for exploring evolutionary and ecological processes that maintain biological diversity. After documenting several extralimital locations for Black-fronted Ground-Tyrants (Muscisaxicola frontalis; Tyrannidae), we questioned the accuracy of the current winter range estimate. We provide specimen and observation records from central and southern Peru that represent new information about the winter distribution of Black-fronted Ground-Tyrants. We used ecological niche models generated from new extralimital records and records from the winter range to assess the current range estimate. We also tested winter and extralimital niche models for model equivalency using a resampling technique available through Maxent and ENM Tool...
The impact of timber exploitation on biodiversity is usually increased by hunting in the exploite... more The impact of timber exploitation on biodiversity is usually increased by hunting in the exploited area. Proper forest management practices on areas under commercial exploitation minimize hunting and damage to the forest. Large species of Cracidae, the most endangered family of birds in the Neotropics, are among the first to be affected in a Neotropical forest damaged by timber-extraction activities, and where at least moderate hunting occurs. Herein an assessment of cracids is carried out in three areas with selective logging in Peru in 2004 and 2005, is used to evaluate hunting pressure. Tree inventory trails were used as transects, and density was calculated using the line transect methodology. Four species of cracids were evaluated, and density was calculated for three of them. The area with lower hunting pressure, Maderyja, showed higher cracid diversity and was the only with the presence of razor-billed curassows (Mitu tuberosum) and blue-throated pining-guans (Pipile cumanens...
Mastozoología neotropical, 2010
The presence of Mazama rufina (Cervidae, Artiodactyla) in Peru is confirmed. Previous reports on ... more The presence of Mazama rufina (Cervidae, Artiodactyla) in Peru is confirmed. Previous reports on the species in this country were erroneous and correspond to Mazama americana. Records of M. rufina in Peru include two live individuals and collected remains from six other specimens. The distribution of the species in Peru seems to be restricted to the montane forests of the Equatorial Yungas, in northern Cajamarca and along the northern sector of the ridge between Piura and Cajamarca departments. RESUMEN. Primeros registros y estado de conservacion de Mazama rufina (Cervidae, Artiodactyla) en Peru. Se confirma la presencia de Mazama rufina (Cervidae, Artiodactyla) en el Peru. Los reportes anteriores de la especie en Peru fueron erroneos y los especimenes correspondian a Mazama americana. Los registros reportados en este trabajo incluyen dos individuos vivos y restos colectados de otros seis especimenes. La distribucion de la especie en Peru parece estar restringida a los bosques monta...
Mastozoologia Neotropical, Jun 1, 2010
Revista Peruana De Biologia, 2007
Unplanned deer management was observed while doing research on the possibility of displacement by... more Unplanned deer management was observed while doing research on the possibility of displacement by cattle (Bos taurus) over the population of taruka (Hippocamelus antisensis) and white-tailed deer (Odocoileus virginianus) at Rio Abiseo National Park highlands. Three areas with similar vegetation, each 30 km2, were compared by calculating cattle densities by transect sampling and the Distance program. In the northern area,
The size of a population is of fundamental importance in determining the conservation status of a... more The size of a population is of fundamental importance in determining the conservation status of a species. Understanding a population usually involves a survey of the number of individuals in it. Concerns regarding wildlife conservation increased dramatically during the twentieth century due to the extinction or quasi-extinction of several species caused both by human related (eg hunting and fishing, habitat degradation) or natural (eg catastrophic events, disease outbreaks) sources. These revealed the need for the establishment of ...
Zaratornis was believed to be a specialist on fruits from Loranthaceae species for feeding. Howev... more Zaratornis was believed to be a specialist on fruits from Loranthaceae species for feeding. However, we found one individual feeding on Solanum nitidum, which may indicate a larger food offer for the species or a recent adaptation to Polylepis forest loss (where specific Loranthaceae species develop).
Tarucas (Hippocamelus antisensis) live in rocky areas in the Andes, from northern Peru to norther... more Tarucas (Hippocamelus antisensis) live in rocky areas in the Andes, from northern Peru to northern Argentina. Microhistological analyses on their feeding ecology during the rainy and dry seasons were done at a National Park and a Landscape Reserve. The diet was diverse and more than 50 species were identified from the feces. Grass species were most often detected as eaten by taruca during the rainy season comprising near 70% of the consumed fragments with 35 plant species identified as eaten then. In the dry season, around 50 species were identified as eaten by tarucas, mostly dicotyledonous. The main species consumed in both seasons were Werneria nubigena, Poa gymnantha, Senecio comosus, and Ephedra americana. The ecological density was an intermediate value compared to other observed values in Peru. This is the first study to find the importance of grasses for tarucas, selected when soft, during the rainy season. A possible overlap with domestic ungulates' diets should be explored, helping the conservation of taruca and generating an adequate management of the species and the ecosystem. There is a change in the palatable offer of food items during the rainy season, when most of the Gramineae species are tender.
Cotinga, 2008
Explains the records of the Tiger heron in the western side of Andean Peru.
Journal of Field Ornithology, 2011
ABSTRACT. Estimating the geographic range of a species can be complicated by insufficient occurre... more ABSTRACT. Estimating the geographic range of a species can be complicated by insufficient occurrence data and a lack of information about range limit determinants. Accurate estimates of species distributions are needed to assess the impacts of anthropogenic actions and for exploring evolutionary and ecological processes that maintain biological diversity. After documenting several extralimital locations for Black-fronted Ground-Tyrants (Muscisaxicola frontalis; Tyrannidae), we questioned the accuracy of the current winter range estimate. We provide specimen and observation records from central and southern Peru that represent new information about the winter distribution of Black-fronted Ground-Tyrants. We used ecological niche models generated from new extralimital records and records from the winter range to assess the current range estimate. We also tested winter and extralimital niche models for model equivalency using a resampling technique available through Maxent and ENM Tool...
The impact of timber exploitation on biodiversity is usually increased by hunting in the exploite... more The impact of timber exploitation on biodiversity is usually increased by hunting in the exploited area. Proper forest management practices on areas under commercial exploitation minimize hunting and damage to the forest. Large species of Cracidae, the most endangered family of birds in the Neotropics, are among the first to be affected in a Neotropical forest damaged by timber-extraction activities, and where at least moderate hunting occurs. Herein an assessment of cracids is carried out in three areas with selective logging in Peru in 2004 and 2005, is used to evaluate hunting pressure. Tree inventory trails were used as transects, and density was calculated using the line transect methodology. Four species of cracids were evaluated, and density was calculated for three of them. The area with lower hunting pressure, Maderyja, showed higher cracid diversity and was the only with the presence of razor-billed curassows (Mitu tuberosum) and blue-throated pining-guans (Pipile cumanens...
Mastozoología neotropical, 2010
The presence of Mazama rufina (Cervidae, Artiodactyla) in Peru is confirmed. Previous reports on ... more The presence of Mazama rufina (Cervidae, Artiodactyla) in Peru is confirmed. Previous reports on the species in this country were erroneous and correspond to Mazama americana. Records of M. rufina in Peru include two live individuals and collected remains from six other specimens. The distribution of the species in Peru seems to be restricted to the montane forests of the Equatorial Yungas, in northern Cajamarca and along the northern sector of the ridge between Piura and Cajamarca departments. RESUMEN. Primeros registros y estado de conservacion de Mazama rufina (Cervidae, Artiodactyla) en Peru. Se confirma la presencia de Mazama rufina (Cervidae, Artiodactyla) en el Peru. Los reportes anteriores de la especie en Peru fueron erroneos y los especimenes correspondian a Mazama americana. Los registros reportados en este trabajo incluyen dos individuos vivos y restos colectados de otros seis especimenes. La distribucion de la especie en Peru parece estar restringida a los bosques monta...
Mastozoologia Neotropical, Jun 1, 2010
Revista Peruana De Biologia, 2007
Unplanned deer management was observed while doing research on the possibility of displacement by... more Unplanned deer management was observed while doing research on the possibility of displacement by cattle (Bos taurus) over the population of taruka (Hippocamelus antisensis) and white-tailed deer (Odocoileus virginianus) at Rio Abiseo National Park highlands. Three areas with similar vegetation, each 30 km2, were compared by calculating cattle densities by transect sampling and the Distance program. In the northern area,
The size of a population is of fundamental importance in determining the conservation status of a... more The size of a population is of fundamental importance in determining the conservation status of a species. Understanding a population usually involves a survey of the number of individuals in it. Concerns regarding wildlife conservation increased dramatically during the twentieth century due to the extinction or quasi-extinction of several species caused both by human related (eg hunting and fishing, habitat degradation) or natural (eg catastrophic events, disease outbreaks) sources. These revealed the need for the establishment of ...
Zaratornis was believed to be a specialist on fruits from Loranthaceae species for feeding. Howev... more Zaratornis was believed to be a specialist on fruits from Loranthaceae species for feeding. However, we found one individual feeding on Solanum nitidum, which may indicate a larger food offer for the species or a recent adaptation to Polylepis forest loss (where specific Loranthaceae species develop).
Tarucas (Hippocamelus antisensis) live in rocky areas in the Andes, from northern Peru to norther... more Tarucas (Hippocamelus antisensis) live in rocky areas in the Andes, from northern Peru to northern Argentina. Microhistological analyses on their feeding ecology during the rainy and dry seasons were done at a National Park and a Landscape Reserve. The diet was diverse and more than 50 species were identified from the feces. Grass species were most often detected as eaten by taruca during the rainy season comprising near 70% of the consumed fragments with 35 plant species identified as eaten then. In the dry season, around 50 species were identified as eaten by tarucas, mostly dicotyledonous. The main species consumed in both seasons were Werneria nubigena, Poa gymnantha, Senecio comosus, and Ephedra americana. The ecological density was an intermediate value compared to other observed values in Peru. This is the first study to find the importance of grasses for tarucas, selected when soft, during the rainy season. A possible overlap with domestic ungulates' diets should be explored, helping the conservation of taruca and generating an adequate management of the species and the ecosystem. There is a change in the palatable offer of food items during the rainy season, when most of the Gramineae species are tender.