Ciencia y Tecnología

Bono para becas PID y PICT

ANPCyT -

Se comunica que, a través de la Resolución RESOL-2017-21-APN-DANPCYT#MCT, se ha otorgado una bonificación extraordinaria a las Becas PID y PICT financiadas por la Agencia Nacional de Promoción Científica y Tecnológica.

Informes Técnicos - Actualización

ANPCyT -

Se recuerda a los responsables de los proyectos adjudicados y que actualmente se encuentran en ejecución, que es requisito presentar un informe técnico por cada año transcurrido desde la fecha de inicio del proyecto.

Nest niche overlap among the endangered Vinaceous-breasted Parrot (Amazona vinacea) and sympatric cavity-using birds, mammals, and social insects in the subtropical Atlantic Forest, Argentina

CONICET Digital -

Nest niche overlap among the endangered Vinaceous-breasted Parrot (Amazona vinacea) and sympatric cavity-using birds, mammals, and social insects in the subtropical Atlantic Forest, Argentina Bonaparte, Eugenia Bianca; Cockle, Kristina Louise Many forest bird species require tree cavities for nesting, and share this resource with a diverse community of animals. When cavities are limited, niche overlap can result in interspecific competition, with negative consequences for threatened populations. Vinaceous-breasted Parrots (Amazona vinacea) are endangered cavity nesters endemic to the subtropical Atlantic Forest, where cavities are scarce. We examined nest niche overlap among Vinaceous-breasted Parrots and 9 potential competitors (birds and mammals >140 g, and social insects) in Argentina, considering (1) timing of breeding, (2) characteristics of cavities (depth, entrance diameter, height), trees (diameter at breast height DBH, species, condition), and habitat (surrounding land use, distance to edge), and (3) interspecific cavity reuse. During 10 breeding seasons we studied nests and roosts, measured their characteristics, and monitored cavities to detect reuse. We used multinomial logistic regression to determine whether the 6 most abundant taxa differed in nest and roost site characteristics. Timing of breeding overlapped for all bird species except the White-eyed Parakeet (Psittacara leucophthalmus). No combination of cavity, tree, and habitat characteristics predicted the taxa that utilized cavities. Moreover, 8 of the 10 taxa reused cavities interspecifically. The high level of overlap in realized nest niche, combined with previous evidence that cavities could limit bird density in our study area, suggest the possibility of interspecific competition for cavities among multiple taxa. Although models did not perform well at classifying cavities by taxon, some characteristics of cavities, trees, and habitat were selected more by Vinaceous-breasted Parrots than by other taxa, and we recommend targeting conservation efforts toward cavities and trees with these characteristics (7-40 cm entrance diameter, >10 m high, DBH >55 cm). We found 62% of Vinaceous-breasted Parrot nests on farms (vs. ≤50% for other taxa), highlighting the importance of working with local farmers to conserve cavities in anthropogenic habitats as well as in protected areas.

PICT 2016 CABBIO - Proceso de adjudicación

ANPCyT -

El Fondo para la Investigación Científica y Tecnológica (FONCyT) anuncia los resultados del proceso de adjudicación de la convocatoria PICT 2016 Categoría Internacional "CABBIO" mediante la Resolución N° 012/17 del Directorio de la Agencia con fecha 10/01/17.

A mucin-like peptide from Fasciola hepatica instructs dendritic cells with parasite specific Th1-polarizing activity

CONICET Digital -

A mucin-like peptide from Fasciola hepatica instructs dendritic cells with parasite specific Th1-polarizing activity Noya, Verónica; Brossard, Natalie; Rodríguez, Ernesto; Dergan Dylon, Leonardo Sebastian; Carmona, Carlos; Rabinovich, Gabriel Adrián; Freire, Teresa Fasciolosis is a trematode zoonosis of interest in public health and cattle production. We report here the immunostimulatory effect of a 66 mer mucin-like peptide from Fasciola hepatica (Fhmuc), which synergizes with lipopolysaccharide (LPS) to promote dendritic cell (DC) maturation, endowing these cells with Th1-polarizing capacity. Exposure of DCs to Fhmuc in presence of LPS induced enhanced secretion of pro-inflammatory cytokines and expression of co-stimulatory molecules by DCs, promoting their T cell stimulatory capacity and selectively augmenting IFN- secretion by allogeneic T cells. Furthermore, exposure of DCs to Fhmuc augmented LPS-induced Toll-like receptor (TLR) 4 expression on the cell surface. Finally, Fhmuc-conditioned DCs induced parasite specific-adaptive immunity with increased levels of IFN-gamma secreted by splenocytes from vaccinated animals, and higher parasite-specific IgG antibodies. However, DC-treated Fhmuc conferred modest protection against F. hepatica infection highlighting the potent immuno-regulatory capacity of the parasite. In summary, this work highlights the capacity of a mucin-derived peptide from F. hepatica to enhance LPS-maturation of DCs and induce parasite-specific immune responses with potential implications in vaccination and therapeutic strategies.

Apertura Crédito Fiscal 2017

ANPCyT -

La Agencia Nacional de Promoción Científica y Tecnológica, a través del Fondo Tecnológico Argentino (FONTAR), llama a la presentación de Proyectos de Ciencia, Tecnología e Innovación (CTI) para la asignación de Crédito Fiscal en los términos del artículo 9º, inciso b) de la Ley Nº 23.877 y de los Decretos Nº 270 de fecha 11 de marzo de 1998 y Nº 555 de fecha 7 de julio de 2000.

Synoptic taxonomy of cortaderia stapf (danthonioideae, poaceae)

CONICET Digital -

Synoptic taxonomy of cortaderia stapf (danthonioideae, poaceae) Testoni, Daniel; Linder, H. Peter Cortaderia (Poaceae; Danthonioideae) is a medium-sized genus of C3 tussock grasses, widespread in the temperate to tropic-alpine regions of South America. It is particularly important in the subalpine and alpine zones of the Andes. We revised the classification of the genus, and recognize 17 species grouped into five informal groups. We describe one new species, Cortaderia echinata H.P.Linder, from Peru. We provide a key to the groups and the species, complete nomenclature for each species including new lectotypes, and notes on the ecology, distribution and diagnostic morphological and anatomical characters.

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