Manejo de pacas (<i>Cunniculus paca</i>) en cautiverio en chacra de productores misioneros

El ecosistema misionero se ha caracterizado por su rica biodiversidad. La tala indiscriminada, la contaminación, la conversión en uso del suelo y la caza, han resultado en una disminución notable de la misma, al punto de poner en riesgo muchas especies. Siendo conscientes que la fauna constituye un gran potencial para el desarrollo, que es nuestra responsabilidad su preservación, que se ha generado un intenso deterioro de este recurso, es que emprendimos acciones para producir sosteniblemente la paca. Disponer de conocimientos para brindar asesoramiento sobre su manejo en cautiverio, desde habilitación de criadero, entrega de reproductores, alimentación, reproducción, sanidad, seguimiento, hasta manejo genético del plantel. Se logró compromiso, sentido de pertenencia, articular con plantación de frutales nativos, varios productores están consumiendo carne de paca de su criadero, han dejado de ir a cazar y se han convertido en verdaderos difusores de la actividad.The missionary ecosystem is characterized by its rich biodiversity. The logging, pollution, land use conversion and hunting, have resulted in a significant decrease of it, to the point of endangering many species. Being aware that wildlife is a great potential for development, it is our responsibility preservation, which has generated intense deterioration of this resource, we undertook actions to sustainably produce the bale. Has knowledge to advise on its captive management, from enabling hatchery broodstock delivery, feeding, reproduction, health, monitoring, genetic management to campus. Commitment, sense of belonging, articulate planting native fruit, several producers are consuming meat bale of her kennel, have stopped going to hunt and have become true diffusers activity was achieved.Eje: A1 Sistemas de producción de base agroecológica (Trabajos científicos)Facultad de Ciencias Agrarias y Forestale

Primera identificación de Echinococcus vogeli en una paca en la provincia de Misiones, Argentina

Abstract We report the fi rst fi nding of Echinococcus vogeli in a paca, Cuniculus paca, in the tropical forest of Misiones, in the north of Argentina. The presence of the bush dog, Speothos venaticus, E. vogeli´s only natural defi nitive host, was also reported. The polycystic hydatids, 2 to 3 cm in diameter, were only found in the liver of an adult paca. The size range of the hooks and the relative proportion blade/handle did not show signifi cant differences with respect to the ones reported for E. vogeli. The size of E. granulosus hooks, measured for comparison purposes, was signifi cantly smaller (p < 0.0001). These results confi rmed the presence of E. vogeli in Argentina. The probability of fi nding neotropical echinococcosis in humans reinforces the need to expand the search for E. vogeli in Argentina. Echinococcosis due to E. vogeli is very aggressive and may cause death in about a third of the human population affectedSe presenta el primer hallazgo de Echinococcus vogeli en una paca (Cuniculus paca) del bosque tropical de Misiones, norte argentino. Se confirmó también la presencia de su único hospedador natural definitivo conocido, el perro silvestre (Speothos venaticus). Las hidátides poliquísticas, de 2-3 cm de diámetro, se encontraron solo en el hígado de una paca adulta. El rango promedio del largo de los ganchos y la proporción relativa hoja/ mango no mostraron diferencias significativas con respecto a lo ya afirmado para E. voge- li. Los ganchos de E. granulosus, medidos como comparación, fueron significativamente más pequeños (p < 0,0001). Estos resultados confirmaron la presencia de E. vogeli en Argentina. La probabilidad de encontrar equinococosis neotropical en el hombre refuerza la importancia de determinar la distribución de E. vogeli en la Argentina. La equinococo- sis causada por E. vogeli es muy agresiva y puede producir mortalidad hasta en un tercio de la población humana afectada.Fil: Vizcaychipi, Katherina A.. Ciudad Autónoma de Buenos Aires. INEI-ANLIS «Dr. Carlos G. Malbrán»; Argentina;Fil: Helou, Marcia. INTA-EEA Cerro Azul; Argentina;Fil: Dematteo, Karen. Washington University in St. Louis; Estados Unidos de América;Fil: Macchiaroli, Natalia. Consejo Nacional de Investigaciones Científicas y Técnicas . Oficina de Coordinación Administrativa Houssay. Instituto de Investigaciones en Microbiología y Parasitología Médica; Argentina;Fil: Cucher, Marcela Alejandra. Consejo Nacional de Investigaciones Científicas y Técnicas . Oficina de Coordinación Administrativa Houssay. Instituto de Investigaciones en Microbiología y Parasitología Médica; Argentina;Fil: Rosenzvit, Mara Cecilia. Consejo Nacional de Investigaciones Científicas y Técnicas . Oficina de Coordinación Administrativa Houssay. Instituto de Investigaciones en Microbiología y Parasitología Médica; Argentina;Fil: D'Alessandro, Antonio. University of Tulane; Estados Unidos de América

The Radial Distribution of the Interstellar Medium in Disk Galaxies: Evidence for Secular Evolution

One possible way for spiral galaxies to internally evolve would be for gas to flow to the center and form stars in a central disk (pseudo-bulge). If the inflow rate is faster than the rate of star formation, a central concentration of gas will form. In this paper we present radial profiles of stellar and 8 μm emission from polycyclic aromatic hydrocarbons (PAHs) for 11 spiral galaxies to investigate whether the interstellar medium in these galaxies contains a central concentration above that expected from the exponential disk. In general, we find that the two-dimensional CO and PAH emission morphologies are similar, and that they exhibit similar radial profiles. We find that in 6 of the 11 galaxies there is a central excess in the 8 μm and CO emission above the inward extrapolation of an exponential disk. In particular, all four barred galaxies in the sample have strong central excesses in both 8 μm and CO emission. These correlations suggest that the excess seen in the CO profiles is, in general, not simply due to a radial increase in the CO emissivity. In the inner disk, the ratio of the stellar to the 8 μm radial surface brightness is similar for 9 of the 11 galaxies, suggesting a physical connection between the average stellar surface brightness and the average gas surface brightness at a given radius. We also find that the ratio of the CO to 8 μm PAH surface brightness is consistent over the sample, implying that the 8 μm PAH surface brightness can be used as an approximate tracer of the interstellar medium

First report of Echinococcus vogeli in a paca in Misiones province, Argentina

Se presenta el primer hallazgo de Echinococcus vogeli en una paca (Cuniculus paca) del bosque tropical de Misiones, norte argentino. Se confirmó también la presencia de su único hospedador natural definitivo conocido, el perro silvestre (Speothos venaticus). Las hidátides poliquísticas, de 2-3 cm de diámetro, se encontraron solo en el hígado de una paca adulta. El rango promedio del largo de los ganchos y la proporción relativa hoja/ mango no mostraron diferencias significativas con respecto a lo ya afirmado para E. vogeli. Los ganchos de E. granulosus, medidos como comparación, fueron significativamente más pequeños (p < 0,0001). Estos resultados confirmaron la presencia de E. vogeli en Argentina. La probabilidad de encontrar equinococosis neotropical en el hombre refuerza la importancia de determinar la distribución de E. vogeli en la Argentina. La equinococosis causada por E. vogeli es muy agresiva y puede producir mortalidad hasta en un tercio de la población humana afectada.We report the first finding of Echinococcus vogeli in a paca, Cuniculus paca, in the tropical forest of Misiones, in the north of Argentina. The presence of the bush dog, Speothos venaticus, E. vogeli´s only natural definitive host, was also reported. The polycystic hydatids, 2 to 3 cm in diameter, were only found in the liver of an adult paca. The size range of the hooks and the relative proportion blade/handle did not show significant differences with respect to the ones reported for E. vogeli. The size of E. granulosus hooks, measured for comparison purposes, was significantly smaller (p < 0.0001). These results confirmed the presence of E. vogeli in Argentina. The probability of finding neotropical echinococcosis in humans reinforces the need to expand the search for E. vogeli in Argentina. Echinococcosis due to E. vogeli is very aggressive and may cause death in about a third of the human population affected.EEA Cerro AzulFil: Vizcaychipi, Katherina A.. Ciudad Autónoma de Buenos Aires. INEI-ANLIS «Dr. Carlos G. Malbrán»; ArgentinaFil: Helou, Marcia. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Cerro Azul; ArgentinaFil: Dematteo, Karen. University of Missouri. Department of Biology; Estados UnidosFil: Macchiaroli, Natalia. Consejo Nacional de Investigaciones Científicas y Técnicas . Oficina de Coordinación Administrativa Houssay. Instituto de Investigaciones en Microbiología y Parasitología Médica; ArgentinaFil: Cucher, Marcela Alejandra. Consejo Nacional de Investigaciones Científicas y Técnicas . Oficina de Coordinación Administrativa Houssay. Instituto de Investigaciones en Microbiología y Parasitología Médica; ArgentinaFil: Rosenzvit, Mara Cecilia. Consejo Nacional de Investigaciones Científicas y Técnicas . Oficina de Coordinación Administrativa Houssay. Instituto de Investigaciones en Microbiología y Parasitología Médica; ArgentinaFil: D'Alessandro, Antonio. University of Tulane. Department Tropical Medicine; Estados Unido

Warm Dust and Spatially Variable PAH Emission in the Dwarf Starburst Galaxy NGC 1705

We present Spitzer observations of the dwarf starburst galaxy NGC 1705 obtained as part of SINGS. The galaxy morphology is very different shortward and longward of ~5 microns: short-wavelength imaging shows an underlying red stellar population, with the central super star cluster (SSC) dominating the luminosity; longer-wavelength data reveals warm dust emission arising from two off-nuclear regions offset by ~250 pc from the SSC. These regions show little extinction at optical wavelengths. The galaxy has a relatively low global dust mass (~2E5 solar masses, implying a global dust-to-gas mass ratio ~2--4 times lower than the Milky Way average). The off-nuclear dust emission appears to be powered by photons from the same stellar population responsible for the excitation of the observed H Alpha emission; these photons are unassociated with the SSC (though a contribution from embedded sources to the IR luminosity of the off-nuclear regions cannot be ruled out). Low-resolution IRS spectroscopy shows moderate-strength PAH emission in the 11.3 micron band in the eastern peak; no PAH emission is detected in the SSC or the western dust emission complex. There is significant diffuse 8 micron emission after scaling and subtracting shorter wavelength data; the spatially variable PAH emission strengths revealed by the IRS data suggest caution in the interpretation of diffuse 8 micron emission as arising from PAH carriers alone. The metallicity of NGC 1705 falls at the transition level of 35% solar found by Engelbracht and collaborators; the fact that a system at this metallicity shows spatially variable PAH emission demonstrates the complexity of interpreting diffuse 8 micron emission. A radio continuum non-detection, NGC 1705 deviates significantly from the canonical far-IR vs. radio correlation. (Abridged)Comment: ApJ, in press; please retrieve full-resolution version from http://www.astro.wesleyan.edu/~cannon/pubs.htm

Warm Dust and Spatially Variable Polycyclic Aromatic Hydrocarbon Emission in the Dwarf Starburst Galaxy NGC 1705

We present Spitzer observations of the nearby dwarf starburst galaxy NGC 1705 obtained as part of the Spitzer Infrared Nearby Galaxies Survey. The galaxy morphology is very different shortward and longward of ~5 μm: optical and short-wavelength IRAC imaging shows an underlying red stellar population, with the central super star cluster (SSC) dominating the luminosity; longer wavelength IRAC and MIPS imaging reveals warm dust emission arising from two off-nuclear regions that are offset by ~250 pc from the SSC and that dominate the far-IR flux of the system. These regions show little extinction at optical wavelengths. The galaxy has a relatively low global dust mass (~2 × 10^5 M_☉, implying a global dust-to-gas mass ratio ~2-4 times lower than the Milky Way average, roughly consistent with the metallicity decrease). The off-nuclear dust emission appears to be powered by photons from the same stellar population responsible for the excitation of the observed Hα emission; these photons are unassociated with the SSC (although a contribution from embedded sources to the IR luminosity of the off-nuclear regions cannot be ruled out). Low-resolution IRS spectroscopy shows moderate-strength PAH emission in the 11.3 μm band in the more luminous eastern peak; no PAH emission is detected in the SSC or the western dust emission complex. There is significant diffuse emission in the IRAC 8 μm band after starlight has been removed by scaling shorter wavelength data; the fact that IRS spectroscopy shows spatially variable PAH emission strengths compared to the local continuum within this diffuse gas suggests caution in the interpretation of IRAC diffuse 8 μm emission as arising from PAH carriers alone. The nebular metallicity of NGC 1705 falls at the transition level of ~0.35 Z_☉ found by Engelbracht and collaborators, below which PAH emission is difficult to detect; the fact that a system at this metallicity shows spatially variable PAH emission demonstrates the complexity of interpreting diffuse 8 μm emission in galaxies. NGC 1705 deviates significantly from the canonical far-infrared versus radio correlation, having significant far-infrared emission but no detected radio continuum

Primera identificación de Echinococcus vogeli en una paca en la provincia de Misiones, Argentina

Se presenta el primer hallazgo de Echinococcus vogeli en una paca (Cuniculus paca) del bosque tropical de Misiones, norte argentino. Se confirmó también la presencia de su único hospedador natural definitivo conocido, el perro silvestre (Speothos venaticus). Las hidátides poliquísticas, de 2-3 cm de diámetro, se encontraron solo en el hígado de una paca adulta. El rango promedio del largo de los ganchos y la proporción relativa hoja/ mango no mostraron diferencias significativas con respecto a lo ya afirmado para E. voge li. Los ganchos de E. granulosus, medidos como comparación, fueron significativamente más pequeños (p < 0,0001). Estos resultados confirmaron la presencia de E. vogeli en Argentina. La probabilidad de encontrar equinococosis neotropical en el hombre refuerza la importancia de determinar la distribución de E. vogeli en la Argentina. La equinococosis causada por E. vogeli es muy agresiva y puede producir mortalidad hasta en un tercio de la población humana afectada

Sings observations of spiral galaxies - Evidence for secular evolution

One process in the secular evolution of galaxies is the formation of pseudo-bulges. The formation of these pseudo-bulges requires the inflow of gas to smaller radii. If the inflow rate is faster than the rate of star formation, a central concentration of gas will form. In this paper we present radial profiles of stellar and 8 micron emission from Polycyclic Aromatic Hydrocarbons (PAHs) for 11 spiral galaxies to investigate whether the interstellar medium in these galaxies contains a central concentration above that expected from the exponential disk. We find that in five of the 11 galaxies there is a central excess in the 8 micron and CO emission above the inner extrapolation of an exponential disk. In particular, all four barred galaxies in the sample have strong central excesses in both 8 micron and CO emission. This correlation suggests that the excess seen in the CO profiles is, in general, not simply due to a radial increase in the CO emissivity

Sings observations of spiral galaxies - Evidence for secular evolution

One process in the secular evolution of galaxies is the formation of pseudo-bulges. The formation of these pseudo-bulges requires the inflow of gas to smaller radii. If the inflow rate is faster than the rate of star formation, a central concentration of gas will form. In this paper we present radial profiles of stellar and 8 micron emission from Polycyclic Aromatic Hydrocarbons (PAHs) for 11 spiral galaxies to investigate whether the interstellar medium in these galaxies contains a central concentration above that expected from the exponential disk. We find that in five of the 11 galaxies there is a central excess in the 8 micron and CO emission above the inner extrapolation of an exponential disk. In particular, all four barred galaxies in the sample have strong central excesses in both 8 micron and CO emission. This correlation suggests that the excess seen in the CO profiles is, in general, not simply due to a radial increase in the CO emissivity