Thaumatomyrmex fraxini sp. nov. (Hymenoptera: Formicidae), a New Ant Species from the Brazilian Atlantic Forest

A new species of Ponerinae, Thaumatomyrmex fraxini D’Esquivel and Jahyny (Hymenoptera: Formicidae), is described from several localities from Northeastern Brazil, after the morphology of the worker. This species is easily distinguished from any other ones in the genus by a unique combination of characters that justify its allocation to the species-group ferox, sensu Kempf (1975). The known distribution of this species reveals that its inhabits different ecosystems of the Atlantic Forest biome

Nest Biology and Demography of the Fungus-Growing Ant Cyphomyrmex lectus Forel (Myrmicinae; Attini) at a Disturbed Area Located in Rio Claro, SP, Brazil

Cyphomyrmex ants are a basal group of small fungus-growers (Myrmicinae:Attini), which differ profoundly from their most studied relatives Atta and Acromyrmex. Our objective was to investigate the nest biology and demography of the fungus-growing ant Cyphomyrmex lectus in a transitional area (savanna-forest) disturbed by an annual fire regime, in Southeast Brazil. The colonies of C. lectus were located close to each other (mean distance between nests, 3.38 ± 2.75 m). Its external nest structure consisted of a single circular nest-entrance hole but without a conspicuous nest mound. Nests were relatively simple consisting of a single well-formed chamber and a single gallery connecting to the nest entrance. No relationships were found between ant number per colony and gallery length, as well as chamber volume. Nonetheless, we detected an effect of the ant number per colony on chamber depth. In this sense, a deeper chamber could warrant a better protection against fire, natural enemies and offer favorable micro-conditions to yeast culture. The colonies of C. lectus are small (a mean of 70 ± 49.4 individuals/colony). Alates, larvae and pupae were found only in one out of eight colonies. A single dealate queen per colony was observed strongly suggesting that this species is monogynous. Further studies could evaluate whether (1) nests density differ before and after fire periods, (2) fire occurrence affects the survival and establishment rate of new colonies, as well as (3) the nest microclimatic conditions necessary to yeast culture

In practice: bovine nematode control in the face of resistance: fourteen years of adaptive strategies

Integrated Nematode control of bovines in Argentina has been considered "state of the art" for many years because it comprises diagnosis, reasonable use of drugs and epidemiology, and it involves a veterinarian with a holistic vision of the farm’s health and production objectives. In the year 2000 resistance to macrocyclic lactones was discovered and three years later, we found resistance to benzimidazol drugs.Fil: Mejia, M.. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Biología y Medicina Experimental. Fundación de Instituto de Biología y Medicina Experimental. Instituto de Biología y Medicina Experimental; ArgentinaFil: Licoff, N.. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Biología y Medicina Experimental. Fundación de Instituto de Biología y Medicina Experimental. Instituto de Biología y Medicina Experimental; ArgentinaFil: Lacau, Isabel María. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Biología y Medicina Experimental. Fundación de Instituto de Biología y Medicina Experimental. Instituto de Biología y Medicina Experimental; ArgentinaXXVIII World Buiatrics CongressCairnsAustraliaWorld association for Buiatric

The Notch system during pubertal development of the bovine mammary gland

The development of the mammary gland of cows during pre-weaning and puberty will condition its future productive capacity and warrants special study. In this respect, Notch signaling regulates tissue development and fate by modifying cell proliferation and diferentiation and has been involved in stem cell maintenance, but has not been extensively studied in the developing mammary glands in cows. We therefore investigated Notch receptor expression and localization, as well as the expression of Notch ligands and target genes in the mammary gland of Holstein heifers in pre- and post-pubertal stages. Notch receptors 1 to 4 were detected by immunohistochemistry in the parenchyma and stroma of the developing gland. The subcellular localization of the four receptors was predominantly cytoplasmic except for NOTCH4, which was mostly nuclear. The membrane and the active intracellular domains of NOTCH paralogues were identifed by western blot. NOTCH1 and NOTCH2 active domains increased during pubertal stages while NOTCH3 and NOTCH4 active domains decreased, suggesting strikingly diferent involvement of NOTCH paralogues in bovine mammary gland development and diferentiation. The mRNA expression levels of the target genes HEY1 and HEY2 increased during peripuberty whereas no variation of HES1 mRNA levels was observed. The mRNA levels of the Notch ligands JAGGED1 and DELTA1 also increased gradually during development. In conclusion, Notch signaling system dynamically varies throughout the development of the mammary gland during puberty pointing to specifc time involvement of each component.Fil: Bonadeo, Nadia. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Centro de Investigaciones y Transferencia del Noroeste de la Provincia de Buenos Aires; ArgentinaFil: Becu, Damasia. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Biología y Medicina Experimental. Fundación de Instituto de Biología y Medicina Experimental. Instituto de Biología y Medicina Experimental; ArgentinaFil: Cristina, Silvia Carolina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Centro de Investigaciones y Transferencia del Noroeste de la Provincia de Buenos Aires; ArgentinaFil: Lacau, Isabel María. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Biología y Medicina Experimental. Fundación de Instituto de Biología y Medicina Experimental. Instituto de Biología y Medicina Experimental; Argentin

Los Cahiers de Civilisation espagnole contemporaine y la filosofía española contemporánea: un intento de aportación / The Cahiers de Civilisation espagnole contemporaine and the Spanish contemporary philosophy: a contribution

Los Cahiers de Civilisation espagnole contemporaine, fundados por Jacques Maurice y dirigidos actualmente por Manuelle Peloille (con Gérard Brey y Serge Buj como directores adjuntos), vienen desde hace algunos años tratando de paliar el vacío historiográfico que existe en Francia en materia de filosofía española contemporánea, y concretamente en historia cultural del pensamiento y de las ideas. Últimamente se han publicado dos dossiers en torno a este tema.Palabras claves: Los Cahiers de Civilisation espagnole contemporaine, filosofía española contemporánea, ausencia historiográfica, Francia.Abstract:The Cahiers de Civilisation espagnole contemporaine, created by Jacques Maurice and directed at the present time by Manuelle Peloille (with Gérard Brey and Serge Buj as assistant directors), have tempted for several years to get round the historiographical blank that exists in France in terms of Spanish contemporary philosophy, as well as cultural history of thought and ideas. The latest records on these topics have shown this point, examining the link between philosophy and Spain.Key words: The Cahiers de Civilisation espagnole contemporaine, the Spanish contemporary philosophy, historiographic absence, France

Composition and Diversity of Ant Species into Leaf Litter of Two Fragments of a Semi-Deciduous Seasonal Forest in the Atlantic Forest Biome in Barra do Choça, Bahia, Brazil

We present here the preliminary results of a study of leaf litter ant diversity in remnant areas of semi-deciduous seasonal forests in the Atlantic Forest biome. Standardized collections were made in 2011, using pitfall and Winkler traps in two fragments of native forest belonging to the municipality of Barra do Choça in the micro-region of the Planalto da Conquista, in Southwestern Bahia State, Brazil; 107 species from 37 ant genera and 9 subfamilies were collected. The observed richness was high, and the diversity indices (Shannon-Wiener) of the two fragments suggest that in spite of being strongly impacted by anthropogenic actions, they maintained a high faunal diversity levels, similar to those observed in other original Atlantic Forest sites in Bahia State. Analyses of the accumulated species richness curves and estimated richnesses (Jackknife 2), however, demonstrated that the survey efforts expended were not sufficient to capture all of the species present. The high observed numbers of unique species, smooth curves of the accumulated richness graphs, and high values of estimated richness suggested that the survey areas were quite heterogeneous. These results furnished new information concerning regional biodiversity that will be useful as initial references for continuing studies of fragmentation processes in the region

Hylomyrma villemantae sp. nov. (Hymenoptera: Formicidae), a New Ant Species from Mountain Rainforests of the Atlantic Forest Biome

A new species of Myrmicinae, Hylomyrma villemantae Neves and Lacau (Hymenoptera: Formicidae), is described after the morphology of the worker. This species is easily distinguished from any other ones in the genus by a unique combination of characters, including the fourth abdominal tergite wholly smooth and shining. This ant is probably endemic from southern Bahia in Brazil. It was collected in a forest remnant of Tropical Mountain Rainforests in the Atlantic Forest biome