1,721,014 research outputs found
First record of Vitalius longisternalis Bertani, 2001 (Araneae, Theraphosidae) in Argentina and notes on its natural history in Misiones province
Full text linkThis is the first record for the tarantula Vitalius longisternalis Bertani, 2001 in Parana and Araucaria Forests, Misiones province, northeastern Argentina. Specimens were found at Iguazú National Park and Urugua-í Wildlife Reserve. Data on its natural history is provided.Fil: Ferretti, Nelson Edgardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico la Plata. Centro de Estudios Parasitológicos y de Vectores (i); Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo; ArgentinaFil: Copperi, Maria Sofia. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnológico Bahia Blanca. Instituto de Ciencias Biologicas y Biomedicas del Sur; ArgentinaFil: Schwerdt, Leonela Vanesa. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Bahía Blanca. Centro de Recursos Naturales Renovables de la Zona Semiárida(i); ArgentinaFil: Pompozzi, Gabriel Alejandro. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnológico Bahia Blanca. Instituto de Ciencias Biologicas y Biomedicas del Sur; Argentin
Arañas Mygalomorphae de la Provincia de Buenos Aires, Argentina: clave para la determinación de especies
Full text linkEn el presente trabajo se ofrece una clave para la identificación de las especies de arañas pertenecientes al infraorden Mygalomorphae conocidas en la provincia de Buenos Aires, Argentina. Además, se presenta una breve descripción de algunos aspectos de su biología y distribuciónFil: Ferretti, Nelson Edgardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Estudios Parasitológicos y de Vectores. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Estudios Parasitológicos y de Vectores; ArgentinaFil: Pompozzi, Gabriel Alejandro. Universidad Nacional del Sur; ArgentinaFil: Copperi, Sofía. Universidad Nacional del Sur. Departamento de Economía; ArgentinaFil: Gonzalez, Alda. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Estudios Parasitológicos y de Vectores. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Estudios Parasitológicos y de Vectores; ArgentinaFil: Pérez Miles, Fernando. Universidad de la República; Urugua
Feeding frequency, prey acceptance, and natural diet of the mygalomorph spider acanthogonatus centralis goloboff 1995 (Araneae: Nemesiidae)
Full text linkThe family Nemesiidae is the second most diverse family of Mygalomorphae spiders. Acanthogonatus centralis (Nemesiidae) is commonly found in hilly areas of central Argentina. These spiders are considered generalists due to their basal position in the phylogeny, but little is known about the trophic ecology of the species. Therefore, the objectives of this study were to study some of the species’ predatory traits, such as feeding frequency and prey acceptance, and to assess its natural diet. In addition, two parameters - attack latency and consumption time - were measured for each accepted prey. We found that A. centralis feeds every two days and accepts almost all prey offered. The most accepted prey items were beetle larvae and termites. In fact, termites were attacked faster than any other prey, suggesting they are a suitable prey for these spiders. In regard to the species’ natural diet, we found remains of seven prey items, ants and beetles being the most frequent. In this study, we found that Acanthogonatus centralis is polyphagous since it accepts different kinds of prey.Fil: Pompozzi, Gabriel Alejandro. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Ciencias Biológicas y Biomédicas del Sur. Universidad Nacional del Sur. Departamento de Biología, Bioquímica y Farmacia. Instituto de Ciencias Biológicas y Biomédicas del Sur; ArgentinaFil: Copperi, Maria Sofia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Ciencias Biológicas y Biomédicas del Sur. Universidad Nacional del Sur. Departamento de Biología, Bioquímica y Farmacia. Instituto de Ciencias Biológicas y Biomédicas del Sur; Argentin
First record of Vitalius roseus (Mello-Leitão, 1923) (Araneae: Theraphosidae: Theraphosinae) in Argentina: distribution map, natural history, and sexual behavior
Full text linkThis is the first record for the species Vitalius roseus (Mello- Leitão, 1923) in Argentina. The present study expands the known geographic distribution of the species to western Uruguay River. Data on natural history and sexual behaviour of the species is provided.Fil: Ferretti, Nelson Edgardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico la Plata. Centro de Estudios Parasitológicos y de Vectores (i); ArgentinaFil: Copperi, Maria Sofia. Universidad Nacional del Sur. Departamento de Biología, Bioquímica y Farmacia. Laboratorio de Zoología de Invertebrados Ii; ArgentinaFil: Schwerdt, Leonela Vanesa. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Bahía Blanca. Centro de Recursos Naturales Renovables de la Zona Semiárida(i); ArgentinaFil: Pompozzi, Gabriel Alejandro. Universidad Nacional del Sur. Departamento de Biología, Bioquímica y Farmacia. Laboratorio de Zoología de Invertebrados Ii; Argentin
On Puan, a New Genus of Goblin Spiders from Argentina (Araneae, Dysderoidea, Oonopidae)
Full text linkA new genus of Oonopidae, Puan, is described from Argentina. The genus exhibits several features also found in orsolobids, including a well-sclerotized sperm duct and an H-shaped eye pattern. Puan resembles the oonopid genus Unicorn Platnick and Brescovit but differs in male palpal morphology. In addition, males lack the clypeal horn characteristic of Unicorn. Two new species, P. chechehet and P. nair, are described from the southwestern mountains of Buenos Aires province. Complex copulatory bulbs are the principal characteristic of these species and could be a synapomorphy for the genus.Fil: Izquierdo, Matías Andres. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Pque. Centenario. Museo Argentino de Ciencias Naturales "bernardino Rivadavia". Departamento de Invertebrados; ArgentinaFil: Ferretti, Nelson Edgardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Estudios Parasitológicos y de Vectores. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Estudios Parasitológicos y de Vectores; ArgentinaFil: Pompozzi, Gabriel Alejandro. Universidad Nacional del Sur. Departamento de Biología, Bioquímica y Farmacia. Laboratorio de Zoología de Invertebrados II; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentin
Triple interaction network among flowers, flower visitors and crab spiders in a grassland ecosystem
Full text linkThis study presents the first description of a tri-trophic interaction network with crab spiders as predators. Monthly observations of flowering entomophilous plant species were recorded between December 2009 and March 2010 and their flower visitors and predators (crab spiders) were caught, with or without prey. Moreover, flower visitors of different Orders were caught to evaluate the amount of pollen transported. In order to analyze changes in the plant species and crab spiders, we evaluated the interaction networks in which we had removed different Orders of prey (Hymenoptera, Diptera and Lepidoptera) from the original network. Our results indicate that crab spiders select their preys within the community. Furthermore, the Hymenoptera carried higher pollen loads and was the less frequent prey. When the Diptera preys were removed from the initial interaction network, network changes mainly affected the species richness of crab spiders. Decrease in density of Diptera, could increase plant resources useful for flower visitors carrying great pollen loads and could promote pollination. Crab spider preys might be restricted to only the more vulnerable flower visitors (e.g. smaller dimensions, without sting or with delicate cuticula) which consume resources and are inefficient as pollen carriers. The selected predation could not negatively affect the fitness of plants.Fil: Marrero, Hugo Javier. Universidad de Buenos Aires. Facultad de Agronomía. Cátedra de Botánica General; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Torretta, Juan Pablo. Universidad de Buenos Aires. Facultad de Agronomía. Cátedra de Botánica General; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Pompozzi, Gabriel Alejandro. Universidad Nacional del Sur. Departamento de Biología, Bioquímica y Farmacia. Laboratorio de Zoología de Invertebrados II; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentin
Notes on eggsacs and spiderlings of two species of Grammostola (Araneae: Theraphosidae) from Central Argentina
Full text linkTwo tarantula species inhabit south of Buenos Aires province, Argentina, Grammostola doeringi (Holmberg, 1881) and Grammostola vachoni Schiapelli & Gerschman, 1961. Grammostola doeringi can be easily found in nearby the locality of Bahía Blanca, where it lives in tubular burrows that are constructed in open fields. The other tarantula species, Grammostola vachoni, inhabits burrows constructed under stones in the rocky hills of northern and central Argentina. Adult females occupy soil burrows under stones and remain within, or close to, this shelter at all times. This tarantula species is common in the hilly zone in the locality of Sierra de la Ventana. Recently, distributional data analysis showed that maybe they could comprise sympatric species and studies on ethological reproductive isolation are being developed by the authors. Moreover, both species have the same reproductive period with walking males in spring in Southern Hemisphere (October ? December). The aim of this study is to present preliminary notes about the development of these two Grammostola species.Fil: Ferretti, Nelson Edgardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Estudios Parasitológicos y de Vectores. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Estudios Parasitológicos y de Vectores; ArgentinaFil: Pompozzi, Gabriel Alejandro. Universidad Nacional del Sur. Departamento de Biología, Bioquímica y Farmacia. Laboratorio de Zoología de Invertebrados II; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Copperi, Maria Sofia. Universidad Nacional del Sur. Departamento de Biología, Bioquímica y Farmacia. Laboratorio de Zoología de Invertebrados II; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentin
Fight or flight: agonistic interactions between females of Acanthogonatus centralis Goloboff 1995 (Araneae, Mygalomorphae)
Full text linkUsing a resident (R)–intruder (I) paradigm, 132 encounters between female Acanthogonatus centralis were investigated in order to study its intrasexual interactions and aggressiveness. We also examined the effect of presumed increased hunger levels on the incidence of killing and cannibalism. We selected 3 groups with different satiation levels: medium group (M), low group (L), and high group (H). Interactions took place in 79.54% of the trials. Aggression by lunges or bites was observed in 21.96% of encounters. Spiders made foreleg vibrations and touched the silk, which functioned as an aggression-attenuating mechanism. Other general behaviors observed include threat behavior and hug behavior. We found significant differences between charges and retreats in the following treatments: M(R)–M(I), L(R)–L(I), H(R)–H(I), and H(R)–M(I). During encounters we observed 9 cases of cannibalism between females. Interactions were predominantly nonaggressive, at least in the resident–intruder paradigm. Intraspecific predation was not a response to presumed increased hunger. Future approaches to agonistic behavior and cannibalism should include analyses of diet characteristics over longer periods and of experience in determining the outcome of encounters between adult females.Fil: Ferretti, Nelson Edgardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Estudios Parasitológicos y de Vectores. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Estudios Parasitológicos y de Vectores; ArgentinaFil: Copperi, Maria Sofia. Universidad Nacional del Sur. Departamento de Biología, Bioquímica y Farmacia; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Pompozzi, Gabriel Alejandro. Universidad Nacional del Sur. Departamento de Biología, Bioquímica y Farmacia; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentin
Livestock systems preserving natural grasslands are biodiversity reservoirs that promote spiders’ conservation
No full textGrasslands are endangered habitats through the world. Among its threats, land-use change has been recognized as one of the most important drivers of biodiversity decline. Sustainable livestock farming can be important conserving grasslands and preserving their biodiversity, and particularly in Uruguay are extensive and are carried out based on natural grasslands with little external management. However, in recent years there has been an increasing in land-use change, replacing natural grasslands with cultivated pastures, leading to a homogenization of the environments. Spiders are a model group for ecological studies, because they are good indicators of environmental change. Our goals were to evaluate the effect of land-use change (natural grasslands by annual pastures) in livestock systems of Uruguay on the spider community; and describe this community identifying conservation priority species and potential environmental indicators. We collected spiders seasonally during 1 year in three farms in Uruguay with a cattle and sheep full cycle production system. We found that substitution of natural grasslands by pastures in livestock systems implied a reduction in spider abundance and species richness. We found species considered of priority conservation for the country according to a local list and added new species to that list. Implications for insect conservation Our results highlight the importance of conservation of natural grasslands, even in productive systems, to reduce spider diversity loss, and contribute to preserve one of the most threatened environments in the region.Fil: Pompozzi, Gabriel Alejandro. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Investigaciones de las Zonas Áridas. Provincia de Mendoza. Instituto Argentino de Investigaciones de las Zonas Áridas. Universidad Nacional de Cuyo. Instituto Argentino de Investigaciones de las Zonas Áridas; ArgentinaFil: de Santiago, Fernanda. Instituto Nacional de Investigación Agropecuaria; UruguayFil: Blumetto, Oscar. Instituto Nacional de Investigación Agropecuaria; UruguayFil: Simó, Miguel. Universidad de la República. Facultad de Ciencias; Urugua
Nuevos datos de distribución de Grammostola burzaquensis Ibarra-Grasso, 1946 (Araneae, Theraphosidae) en el sistema serrano de Tandilia
Full text linkEn el presente trabajo se presentan nuevos registros de Grammostola burzaquensis Ibarra-Grasso, 1946 en el sistema serrano de Tandilia, cuyos reportes amplían la distribución geográfica de dicha especie.Fil: Ferretti, Nelson Edgardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - la Plata. Centro de Estudios Parasitologicos y de Vectores. Universidad Nacional de la Plata. Facultad de Cs.naturales y Museo. Centro de Estudios Parasitologicos y de Vectores; ArgentinaFil: Schwerdt, Leonela Vanesa. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Centro de Recursos Naturales Renovables de la Zona Semiarida. Universidad Nacional del Sur. Centro de Recursos Naturales Renovables de la Zona Semiarida; ArgentinaFil: Peralta, Luciano. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencia Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; ArgentinaFil: Farina, Juan. Museo Municipal de Ciencias Naturales "Lorenzo Scaglia"; ArgentinaFil: Pompozzi, Gabriel Alejandro. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Ciencias Biológicas y Biomédicas del Sur. Universidad Nacional del Sur. Departamento de Biología, Bioquímica y Farmacia. Instituto de Ciencias Biológicas y Biomédicas del Sur; Argentin
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