Time filter

Source Type

San Salvador de Jujuy, Argentina

The National University of Jujuy is an Argentine national university, situated in the city of San Salvador de Jujuy, capital of Jujuy Province. Its presursor, the Instituto Superior de Ciencias Económicas , was established by Governor Horacio Guzmán in 1959. Redesignated the Provincial University of Jujuy in 1972, a program of decentralization of the country's national university system, as outlined by presidential adviser Dr. Alberto Taquini, resulted in the school's formal establishment as such on November 11, 1973.The university maintains sixteen schools and five institutes, the latter of which are specialized in mining, geology, and zoology. It also operates an FM radio station, UNJu, and a publisher, EdiUNJu. Wikipedia.

Internally drained basins of the Andean Plateau are lithium- and boron-bearing systems. The exploration of ionic facies and parental links in a playa lake located in the eastern Puna (23°–23°30′S) was assessed by hydrochemical determinations of residual brines, feed waters and solutions from weathered rocks. Residual brines have been characterized by the Cl− (SO4 =)/Na+ (K+) ratio. Residual brines from the playa lake contain up to 450 mg/l of boron and up to 125 mg/l of lithium, and the Las Burras River supplies the most concentrated boron (20 mg/l) and lithium (3.75 mg/l) inflows of the basin. The hydro-geochemical assessment allowed for the identification of three simultaneous sources of boron: (1) inflow originating from granitic areas of the Aguilar and Tusaquillas ranges; (2) weathering of the Ordovician basement; and (3) boron-rich water from the Las Burras River. Most of the lithium input of the basin is likely generated by present geothermal sources rather than by weathering and leaching of ignimbrites and plutonic rocks. However, XRD analyses of playa lake sediments revealed the presence of lithian micas of clastic origin, including taeniolite and eucriptite. This study is the first to document these rare Li-micas from the Puna basin. Thus, both residual brines and lithian micas contribute to the total Li content in the studied hydrologic system. © 2016 Springer-Verlag Berlin Heidelberg Source

Numa C.,University of Alicante | Verdu J.R.,University of Alicante | Rueda C.,National University of Jujuy | Galante E.,University of Alicante
Rangeland Ecology and Management

Dung beetles are considered keystone species because of their role in decomposition, seed dispersal, and control of vertebrate parasites in grazed habitats. Despite the ecological importance of this group to pasture ecosystem functioning, still little is known about its relationship with grazing management activities. We evaluated the conservation value of protected areas for dung beetle diversity by comparing two different management conditions of Mediterranean savanna in central Spain. Four different sites with wild herbivory (red deer, roe deer) were sampled inside the Cabaeros National Park, and four sites with traditional agrosilvopastoral management were sampled in a sheep farm near the park. The dung beetle species richness was similar between savanna conditions, but the total dung beetle abundance and biomass were considerably greater in the park grasslands than in the grasslands of the sheep farm. Dung beetle species composition, species dominance, and abundance by functional groups from both park and farm sites were different, despite the high similarity among the sampled sites in both hydric content and dung availability. Onthophagus maki (Illiger 1803) and O. furcatus (Fabricius 1781) were the dominant species in the park, while O. furcatus, Aphodius foetidus (Herbst 1783), and Caccobius schreberi L. were the dominant species on the farm. Species richness and abundance of telecoprids were higher in the park than on the farm. Abundance of paracoprids was also higher in the park than on the farm, while no differences in species richness and abundance of endocoprids were observed between both conditions. These results suggest that management activities such as plowing and the use of veterinary substances affect soil structure and dung quality and could be important factors that alter dung beetle assemblages in terms of composition, abundance, and biomass on traditional farms. © 2012 Society for Range Management. Source

Quirog N.I.,National University of Jujuy | Dominguez M.C.,Laboratorio Of Entomologia
Studies on Neotropical Fauna and Environment

This study describes the male, female and third instar larva of Fannia yunguensis sp. nov., a new species of Fanniidae that was reared from larvae captured on pig carcasses in the Yungas of the province of Jujuy, Argentina. Modifications to the keys for males and females are also provided. The presence of an epiphallus suggests including the new species into the pusio subgroup of the canicularis species group. © 2010 Taylor & Francis. Source

Contreras E.F.,National University of Jujuy | Del Carmen Coscaron M.,National University of La Plata

In Argentina, 14 genera and 41 species are recorded, belonging to 5 subfamilies: Aneurinae, Aradinae, Calisiinae, Isodeminae and Mezirinae. Aneurosoma dissimile (Bergroth); Aneurus bosqui Kormilev; Aphleboderrhis comata Champion; Aphleboderrhis pilosa Stål; Aradus angustellus (Blanchard); Aradus brasiliensis Usinger; Aradus mexicanus Usinger; Aradus penningtoni Drake; Calisius confusus Kormilev; Dysodius lunatus (Fabricius); Iralunelus bergi (Kormilev); Iralunelus monrosi (Kormilev); Iralunelus subdipterus (Burmeister); Isodermus gayi (Spinola); Kormilevia dureti (Kormilev); Lobocara oblonga Bergroth; Mezira americana (Spinola); Mezira argentinensis (Kormilev); Mezira birabeni (Kormilev 1953); Mezira bonaerensis Kormilev; Mezira bruchi (Kormilev); Mezira formosa (Kormilev); Mezira granuliger (Stål); Mezira neonigripennis Kormilev; Mezira neonigripennis misionensis Kormilev; Mezira nigripennis Usinger; Mezira paragranuliger Kormilev; Mezira proseni Kormilev; Mezira regularis (Champion); Mezira reuteri (Bergroth); Mezira saltensis Kormilev; Mezira spissigrada Kormilev; Mezira tartagalensis Kormilev; Mezira vianai Kormilev; Neuroctenus centralis (Berg); Neuroctenus punctulatus (Burmeister); Neuroctenus subandinus Kormilev; Neuroctenus terginus (Stål); Notapictinus martinezi (Kormilev); Notapictinus sanmigueli (Kormilev); and Placogenys clarkei Kormilev. Copyright © 2012 - Magnolia Press. Source

Del Carmen Coscaron M.,National University of La Plata | Contreras E.F.,National University of Jujuy

The Aradidae (Hemiptera) of the Neotropical Region are cataloged. A total of 80 genera and 509 species are listed together with their synonyms. References are given to the original descriptions and the subsequent taxonomic position, the location of types and the geographic distribution. A comprehensive bibliography is provided. © 2012 Magnolia Press. Source

Discover hidden collaborations