En el extremo norte de Argentina la red vial incaica presenta al menos dos caminos lon- gitudinales que, con rumbo norte-sur, ingresan al actual territorio en ambientes de tipo puneño. En el mismo espacio se reconocen también diferentes ramales que conectan a las trazas principales con otros ambientes y espacios productivos. En este trabajo se propone analizar la lógica en el emplazamiento de los caminos incaicos y su vinculación con las áreas productivas estatales. La naturaleza y cronología de la conquista incaica del Noroeste Argentino son discutidas en cuanto a sus implicancias para el desarrollo agrícola en la región. Se consideran tres bolsones de producción agrícola estatal ubicados en distintos ambientes: Casabindo (Puna), Rodero-Coctaca (Quebrada de Humahuaca) y Nazareno- Rodeo Colorado (Valles orientales salteños). En este contexto, se relaciona a Casabindo con el aprovisionamiento del camino incaico entre Calahoyo y El Moreno, a Nazareno - Rodeo Colorado con la producción minero-metalúrgica incaica desarrollada en los espacios aledaños y se postula que Rodero - Coctaca abastecía a las explotaciones mineras de los valles orientales de Jujuy, siguiendo el camino que conduce allí desde la Quebrada. De esta manera, en algunos casos las áreas productivas agrícolas servían a la logística del camino, mientras que en otros, el camino servía a la logística de los sectores productivos. Production and inca road logics in Northernmost NorthwesternArgentina
Woodpeckers are considered engineering species of forests and are sensitive to changes in forests composition and structure. Nor- thwestern Argentina contains the largest area of native forest of the country. The objectives of this study are to characterize sites where the Cream-backed woodpecker (Campephilus leucopogon) excavates its nesting or roosting cavities and identify selection patterns of those sites in the Piedmont forest of the Southern Yungas and Dry Chaco forest of NorthwesternArgentina. In both forest regions transects were conducted to search for excavated cavities by the Cream-backed woodpecker. Trees with and without cavities and random plots where characterized. Both in the Piedmont and Chaco forest, most of the excavated cavities found were in live trees of more than 60 cm of diameter at breast height. Excavated cavity height was larger in the Piedmont than in the Chaco forest. The Cream- backed woodpecker selected for excavation Calycophyllum multiflorum and Amburana cearensis in the Piedmont forest and Aspidos
This article analyses old issues related to the social intervention of the Welfare State in provinces of Argentina. It inquires about the outstanding characteristics of housing policy of the Peronista (1946-1955) and Unión Cívica Radical Intransigente (1958-1962) governments in Jujuy. The hypothesis that we defend in this paper shows, despite the obvious policy differences of both administrations, some interesting continuity lines on housing projects and works that have already been carried out. The analysis focuses the urban area of the province of Jujuy, paying special attention to the most populous city: San Salvador de Jujuy. Thus from this study we aim to rescue not only the peculiarities of two governments, antagonistic from many points of view, but also highlight their points of contact in the way the housing problem is faced in that district of NorthwesternArgentina.
Abstract: We describe an association of fossil vertebrates from the Morales Member of the Las curtiembres Formation (campanian) near Puente Morales, Salta Province, nW Argentina. the fossils include teleostean fishes, pipid frogs, pleurodiran turtles, mesoeucrocodylians, non-avian theropod dinosaurs, and enantiornithine birds. the vertebrate record is dominated by freshwater taxa. With the exception of pipid frogs, all taxa here de- scribed constitute new records for this sedimentary unit. Among them, the turtles are reported for the first time in the cretaceous of northwesternArgentina (Salta Group). Additionally, the recently published small enantiorni- thine Intiornis inexpectatus enlarges the diversity of cretaceous birds from South America. despite the fragmen- tary nature of the specimens, the information provided by this Late cretaceous assemblage sheds new light on the composition of the continental vertebrate fauna in a paleontologically poorly known region of South America.
Abstract: The group herein denominated as the Corydoras micracanthus species-group is supported by presenting dorsal and pectoral spines length reduced; caudal fin slightly emarginated; low body depth; parieto-supraoccipital process and nuchal plate not in contact and small eyes for the genus. It comprises Corydoras micracanthus, herein redescribed, and two new species described in the present paper, all from northwesternArgentina. Corydoras gladysae, a new species from the Calchaquí river, is distinguished from other species of the genus by the caudal-fin shape, slightly emarginated and by presenting the shortest dorsal and pectoral spines length (mean = 9.2 % and 14.8 % of SL, respectively). Corydoras petracinii, a new species from the Las Costas river, is distinguished from its congeners by the following combination of characters: dorsal spine short (mean = 16.6 % of SL), pectoral spine short (mean = 18.3 % of SL), body moderately elongate (body depth 29.5 % SL mean), caudal fin slightly forked and trunk flanks with 5–7 subsquare differenced blotches in the middle region. Corydoras micracanthus, from the Mojotoro river basin, is defined by its higher number of dorsolateral body plates (24–26) and trunk color pattern, presenting 4 to 6 subsquare blotches well differentiated in the flanks. The inclusion of these species into the genus Corydoras is discussed.
Abstract. We describe the altitudinal variation in species richness, turnover and species composition of small mammals through field surveys along 4 transects ranging from tropical rainforests at 500 m to high Andean deserts at 4 000 m in northwesternArgentina. The elevation pattern of richness for all small mammals decreases with altitude, mainly due to the high diversity of bats in the lowlands. For the terrestrial small mammals there was a clear curvilinear pattern of richness with a peak near the upper tree line at 2 700 m. The maximum values of the species turnover rates were located in the upper part of the gradient at 3 500 m. The composition of small mammals communities in every single elevation transect was consistent with the phytogeographic scheme, with species characteristics of montane rainforest, temperate cloud forests and high Andean steppes. The analysis of the 4 altitudinal transects together revealed that elevation is the main source of variation in species composition. Latitudinally, the 2 northernmost transects, similar between each other, differed from the 2 southernmost, mainly at intermediate elevation, where a high concentration of endemic rodents has been documented.
A B S T R A C T . — Studies on the relative abundance of sympatric lizard populations can give insight into their life histories and, if long-term, can help estimate potential conservation proble- ms. Through the years, patterns of coexistence between two or more species may emerge, such as the effect of one species over the other, or the effect of factors such as precipitation and tem- perature, or prey abundance and predator pressure. Here we report a seven-year study on the relative abundance of two Neotropical species from NorthwesternArgentina, Liolaemus quilmes and L. ramirezae. These two species are found in syntopy at a site called Los Cardones. We monitored an area of 60 x 60 m, two to five days, every one or two months, throughout the activity period of the lizards, from 2000 to 2007. During that time, the relative abundance of L. quilmes, taken as the average number of adults sighted per survey per month, remained stable during the seven-year study whereas that of L. ramirezae increased in the last two years. The relative abundance of one population did not affect the other over the years nor did that of male and female L. quilmes. Although the amount of precipitation varied significantly over the years, it was not associated to the relative abundance of each population. The two species show differen- ces in their habitat use and in prey preferences which may facilitate coexistence. However, besides taking into account these ecological parameters, historical constraints must also be considered in order to explain the patterns observed today.
The gas and condensate reservoirs in the Paleozoic fields in NorthwesternArgentina are the deepest in their class. With an average true vertical depth of more than 5000 meters and wells with head temperatures that can reach 110 ° C. Under the fact that water gets into the reservoir and floods it, I wonder myself if this gas and condensate reservoir can be candidates for their conversion into a middle-temperature geothermal reservoir. Since the wells were not drilled with the aim of being converted and disregarding the possibility of a re-completion, it becomes necessary to find a well production and injector pattern that maximizes the potential of geothermal production, and whether it is possible to identify the relative variations in energy consumption between the different patterns.
The following two new species of Culicoides from the Argentinean Yungas are described, illustrated and placed to subgenus or species group and compared with related congeners: Culicoides calchaqui Spinelli & Veggiani Ay- bar and Culicoides willinki Spinelli & Veggiani Aybar. Culicoides daedaloides Wirth & Blanton is recorded for the first time for Argentina and Culicoides pseudoheliconiae Felippe-Bauer is firstly mentioned from the northwestern region of the country.
2017), en particular aquellos que analizan sus variaciones temporales. La amplitud del espectro trófico y el carácter generalmente oportunista de muchas especies señalan que la composición de la dieta puede ser un buen indicador de la salud de un ecosistema al reflejar la diversidad de sus princi- pales ítems presa (Nanni et al. 2012). Los resultados obteni- dos en este estudio coinciden con la caracterización general de Athene cunicularia, catalogada como oportunista‒ generalista, que incluye en su alimentación una amplia varie- dad de presas como artrópodos, pequeños mamíferos y anfi- bios. Estos resultados coinciden en términos generales con lo referido por otros autores para diferentes ecosistemas (Bellocq & Kravetz 1983, Bellocq 1988, Torres-Contreras et al. 1994, Burn 1999, Pardiñas & Cirignoli 2002, Andrade et al. 2004b, Nabte et al. 2008, Andrade 2010), quienes han de- mostrado además una marcada variación estacional en la dieta de esta lechuza. Estudios realizados en Argentina y Chi- le han demostrado que la proporción de los distintos ítems consumidos pueden variar notablemente de una estación a otra (Bellocq & Kravetz 1983, Coccia 1984; Bellocq 1987, 1988; Torres-Contreras et al. 1994).
Prey, predators, and parasites: 145–156. In: POLIS, G. A. (ed.), Biology of Scorpions. Stanford University Press, California, USA. OJANGUREN AFFILASTRO, A. A. 2003. The genus Brachistosternus in Argentina, with a description of a new Patagonian species (Scor- piones, Bothriuridae). Journal of Arachnology 31: 317–330.
ABSTRACT. Laguna de Pozuelos is an extensive wetland in Morth- western Argentina at 3,600 m above sea level in the Argentinean Andes. The principal lake, placed in the central depression of en- dorheic basin, is rich in minerals like Cu, As, Fe, etc. It collects wa- ter from underground courses and from two main tributaries, name- ly Santa Catalina River to the north and Cincel River to the south. Following the dry and rainy seasons, the surface of the lake is sub- ject to an annual contraction-expansion cycle, with increasing of sa- linity during evaporation period. Prokaryotes inhabitants these par- ticular environments have been not described and a few of such places have been surveyed for microbial diversity studies. To sys- tematically explore the underlying communities of Bacteria from the water lake of Laguna de Pozuelos wetland and Cincel River, bacterial 16S rRNA genes (rDNAs) were PCR amplified and ana- lyzed by terminal restriction fragment length polymorphism (T- RFLP) analysis. Analysis of the microbial community with T-RFLP identified a minimum of 19 operational taxonomic units (OTU). T- RF patterns derived from multiple-enzyme digestion with RsaI, HaeIII and HhaI were analyzed in order to provide a preliminary picture of the relative diversity of this complex microbial communi- ty. By the combined use of the three restriction endonucleases bac- terial populations of this particular place were identified.
The whitefly Bemisia tabaci Gennadius (Hemiptera: Aleyrodidae) is a serious pest of several annual crops, ornamental, industrial, fruit and weeds worldwide (Byrne et al., 1990; Brown et al., 1995; Viscarret, 2000; López-Ávila, 2005). It causes direct damage through sucking sap and the excretion of sugary substances that produce the growth of sooty mold, which causes decrease of the photosynthetic capacity of plant; also causes indirect damage by transmitting viruses and bacterias (Berlinger, 1986; Viscarret, 2000). The species of B. tabaci has caused significant losses in America since 1981, reducing crop productivity of tomato, sweet pepper, beans and textiles (Brown, 1993). In Argentina, the first record of B. tabaci arises from specimens found on unspecified host plant in Tucumán province (Viscarret, 2000). Subsequently, its presence is reported in greenhouses and field crops such as cotton, tobacco, citrus, sugar cane, soybean, forestry and horticultural crops of the families Solanaceae, Cucurbitaceae, Brassicaceae and Asteraceae (Polack, 2005).
concretados tanto en investigaciones estadísticas como en análisis de problemas de población, que fueron introduciendo progresivamente en la Argentina del desierto y la inmigración, la preocupación por una planificación racional de la economía y la sociedad (Berrotarán, 2003; Macor, 2005; Gorelik, 2001; Pantaleón, 2005, 2009; Quintero, 2002; Pereyra, 2012; Mazza, 2004; González Bollo, 2014; entre otros). Desde la actuación del ingeniero y estadígrafo social-católico Alejandro Bunge en el Departamento Nacional del Trabajo a partir de 1910, la dirección de la Revista de economía argentina desde 1918, así como la institucionalización de la economía como disciplina científica dentro de la Universidad de Buenos Aires, el discurso de las ciencias sociales se venía legitimando como instrumento de las burocracias de estado. Como observa Pantaleón (2009) este pasaje supone la introducción y consagración de ciertas categorías de percepción de lo social mediante la categorización estatal. El vacío censal que se extiende de 1914 a 1947 no sólo es un vacío, sino que posibilita un espacio de discusión en que nuevas ordenaciones y categorizaciones del territorio y las personas se hacen posibles. No es casual que también la geografía se haya desarrollado en la misma década como disciplina científica vinculada a las universidades y a institutos de investigación, que haya cristalizado el concepto de región y se haya además normalizado para la enseñanza escolar (Quintero, 2002; 2004).
Summary: The genus Duchesnea includes two species originally from India: D. indica and D. chrysantha. In NorthwesternArgentina the monitoring of wild strawberry-like species was carried out; during 2002- 2016, many populations of D. indica and none of D. chrysantha were discovered. Red- and white-fruited plants of D. indica were collected from disturbed areas and ex situ conserved in green-house and in nursery conditions. Were also consulted materials from different national and international herbaria, and we only found reports of D. indica with red fruit for Argentina. In the present work, we report for the first time the presence of D. indica f. albocaput in Argentina and South America, cohabiting with populations of D. indica f. indica in the underwoods of Tucumán. This finding broadens the distribution range of D. indica f. albocaput, cited as endemic to Japan by Naruhashi 1992. The morphological and anatomical characters of the two botanical forms of D. indica (red fruit genotypes and white fruit genotypes) are also presented: fruit color, number of leaflets, and crystal form.
Abstract: The Atlantic and Gulf Rapid Reef Assessment (AGRRA) Program, consisting of non-fixed, transect- based visual surveys, provides “snapshot” characterizations of a number of structurally or functionally important benthic and fish indicators on tropical northwestern Atlantic (TNWA) coral reefs and Brazil. To ameliorate the confounding factors inherent in multiyear temporal variation, a region-wide collaborative program for conduct- ing rapid reef assessments at regular (five-year) intervals in sites that are representative of each sub-region of the TNWA is proposed. Member institutions of the Association of Marine Laboratories of the Caribbean (AMLC) and individual colleagues are invited to join in developing the vision. Rev. Biol. Trop. 54 (Suppl. 3): 23-29. Epub 2007 Jan. 15.