Macroinvertebrados bentónicos litorales de la reserva de usos múltiples Isla Martín García: diversidad y respuesta a las variables ambientales

El objetivo de este trabajo está centrado en la diversidad y respuesta a las variables ambientales de los macroinvertebrados bentónicos litorales de la Isla. Se realizaron campañas estacionales (Marzo 1995- Marzo 1996), en ocho sitios. Variables del agua: temperatura, oxígeno disuelto, % saturación del oxígeno, conductividad eléctrica, sólidos disueltos totales y pH. Se recolectaron: Oligochaeta, 22 especies, Naididae, Narapidae, Tubificidae, Aelosomatidae y Enchytraeidae; de Mollusca, Bivalvia (4), Gastropoda (15); Ostracoda (5); Isopoda, Cumacea, Tanaidacea y Amphipoda (1c/u). Insecta, Chironomidae, Ceratopogonidae, Psephaenidae, Elmidae, Baetidae, Leptophlebidae, Pleidae, Coenagrionidae y Protoneuridae. También, Nematoda, Cladocera, Copepoda Cyclopoida, Calanoida y Harpacticoida. Abundancia relativa/taxa/sitio/estación del año, en conjunto, los taxa mejor representados fueron: Heleobia parchappii (78%), Nematoda,(58%), Limnodrilus hoffmeisteri (51%), Stenophysa marmorata (53%), Potamolithus bushii (44%), Sinelobus stanfordi (41%), P. lapidum y P. agapetus (40%), Heleobia piscium (38%), Biomphalaria straminea (24%), Coleoptera Psephaenidae (25%) y Limnoperna fortunei (21%). La diversidad H varió entre 2,16 (Playa Basural, Agosto 1995) y 0,35 (Playa de Arena río, Noviembre 1995).Análisis Canónico de Correspondencia: realizado entre 8 sitios/4 variables ambientales/15 especies. Variables ambientales más fluctuantes: OD, pH, TºC y conductividadn. El 95% de las correlaciones especies/variables se expresan en el Eje 1 del diagrama de ordenamiento. Gomphocythere argentinensis y Chironomidae ubicadas casi en el centroide del diagrama; Stephensoniana trivandrana, Aulodrilus pigueti, Limnodrilus hoffmeisteri, Sinelobus stanfordi, Chaetogaster diastrophus y Nais variabilis cercanas a valores promedio del pH, OD y TºC y Narapa bonettoi más relacionada a valores promedio del pH. Corbicula fluminea, Potamolithus bushii y P. agapetus relacionadas a valores medios de conductividadResúmenes del VII Congreso Argentino de Limnología. 21 al 25 de agosto de 2016 Tucumán, Argentin

Salud sexual y alteraciones emocionales en mujeres colombianas con cáncer de mama

Objective: Determine the effect of mood, anxiety and depression on sexual health and the impact on colombian women who have undergone treatment for breast cancer. Methods: cross-correlational design, non-probability sampling, sample 103 women undergoing treatment for breast cancer. Sexual Function Questionnaire – SFQ Karen Syrjala, 2000), Profile of mood – POMS, anxiety and depression inventory of Beck was applied. Results: The impact of treatment in breast cancer is affected by anxiety and depression experienced by women undergoing these treatments. Also, it is negatively related to sexual health in the dimensions excitement, activity, desire, satisfaction, orgasm, relationships and interest, and the mood in the vigor subscale. In contrast, the mood affects both sexual health as the impact of treatment. Conclusions: It contributes to knowledge about sexual and emotional health facing women as a result of the effects of treatments for breast cancer and provides the basis for nursing development, implementation and measurement of interventions to mitigate the impact of the treatments.Objetivo: Determinar el efecto del estado de ánimo, la ansiedad y la depresión sobre la salud sexual y el impacto en mujeres colom­bianas que han sido sometidas a tratamiento por cáncer de mama. Métodos: Diseño correlacional transver­sal, muestreo no probabilístico, muestra 103 mujeres sometidas a tratamientos por cáncer de mama. Se aplicó el cuestionario de función sexual – SFQ de Karen Syrjala, 2000), Perfil de estados de ánimo – POMS, inventario de ansiedad y depresión de Beck. Resultados: El impacto de los tratamientos en cáncer de mama se afecta por la ansiedad y la depresión que experimentan las mujeres sometidas a estos tratamientos. También, se relaciona negativamente con la salud sexual en las dimensiones excitación, actividad, de­seo, satisfacción, orgasmo, relaciones e inte­rés, y con el estado de ánimo en la subescala vigor. En contraste, el estado de ánimo afecta tanto la salud sexual como el Impacto del tratamiento. Conclusiones: Se contribuye al conoci­miento sobre la salud sexual y emocional que enfrenta la mujer como consecuencia de los efectos de los tratamientos por cáncer de mama y provee las bases a enfermería para el desarrollo, implementación y medición de intervenciones para mitigar el impacto de los tratamientos

Distribution of Deroceras reticulatum (Müller, 1774) (Pulmonata Stylommatophora) in Argentina with first record of the Reserva de Usos Múltiples Isla Martin Garcia, Río de la Plata superior

Deroceras reticulatum is a misanthropic European species spread widely throughout South America. At the moment this species is considered a ‘pest’ in direct sowing such as maize, soybean, sunflower, wheat, alfalfa and clovers, among others. The aim of this paper is to report the first record of D. reticulatum in the Reserva de Usos Multiples Isla Martín García, Buenos Aires province and to provide information about this species distribution in five Argentina provinces.Deroceras reticulatum é uma espécie sinantrópica oriunda da Europa e com grande dispersão na América do Sul. Esta espécie é considerada atualmente praga dos cultivos de semeadura direta de milho, soja, trigo, girassol, alfafa e trevos, entre outros. O presente trabalho tem por objetivo comunicar o primeiro achado do agriolimácido D. reticulatum na Reserva de usos múltiplos Ilha Martín García, província de Buenos Aires e proporcionar informação sobre a distribuição desta espécie em cinco províncias argentinas

Representaciones de género en las imágenes icónicas de los textos escolares de ciencias naturales de los grados sexto a noveno de básica secundaria publicados en el período 1995 - 2009

Este trabajo de investigación tuvo como propósito interpretar las representaciones de género en las imágenes icónicas de los textos escolares de ciencias naturales de los grados sexto a noveno de básica secundaria, tomando como referente los textos de cuatro editoriales: Santillana, Voluntad, Norma y Educar, cuyas fechas de edición se encuentran entre los años 1995 a 2009. La pregunta que nos planteamos fue ¿Cuáles son las representaciones de género en las imágenes icónicas de los textos escolares de Ciencias Naturales de los grados sexto a noveno de la básica secundaria publicados en el período 1995 - 2009?. El desarrollo del trabajo se da a partir de un enfoque mixto: cualitativo y cuantitativo. En el análisis cualitativo lo que interesó fueron las representaciones de género que se analizaron según la cuantificación de las categorías empleando las fichas como instrumentos para la recolección de los datos. La investigación atravesó tres grandes momentos: preparación, que corresponde a la elaboración de los objetivos, la pregunta, la selección de los textos a analizar, etcétera. El segundo momento correspondió al trabajo de campo, en el que se aplicaron los instrumentos de recolección de información a los textos seleccionados y finalmente, el tercer momento lo asociamos a la culminación en la que se hace consolidación de los datos obtenidos con los instrumentos y la formulación de los resultados, siguiendo los intereses propuestos. El corpus de trabajo está constituido por 32 textos escolares de las editoriales Norma, Voluntad, Santillana y Educar publicados para las ciencias naturales entre 1995 y 2009. De ellos, como unidad de trabajo se seleccionaron todas las imágenes en las que aparecen personas (dibujos, fotografías y siluetas). La unidad de análisis que orientó este trabajo fueron las representaciones de género en las imágenes dentro de los textos escolares de Ciencias Naturales de grado sexto a noveno de básica secundaria. Destacamos entre las conclusiones que en cuanto a la formación de los estereotipos se encontraron suficientes datos para establecer cada una de las relaciones lógicas de determinación, interdependencia, constelación y exclusión, lo que nos lleva a concluir que los mecanismos de moldeo siguen actuando, por lo que no es de extrañar que siga existiendo elección diferencial de carreras según el género, lo que se considera normal e incluso deseable y que se explique y justifique de diversas formas; ya que esta es la finalidad del estereotipo que la imagen se torne tan naturalizada y verdadera que no pueda considerarse otra cosa. Repetir de varias formas el mensaje de cómo debe ser un hombre o una mujer, termina por convertirse en la idea de lo que son, en un patrón de comparación, de referencia, si esto se refiere a lo humano lo preponderante es masculino, si esto se refiere a la ciencia el papel de la mujer es muy limitado

The use of littoral benthic macroinvertebrates of the Martín Garcia Island Nature Reserve as indicators of water quality

At Martín García Island—a Natural Reserve located at the confluence of the Paraná and Uruguay rivers—we used benthic-macroinvertebrate biotic indices to elucidate the structure and community parameters of the littoral benthos and their response to environmental variables and to evaluate the island's coastal water quality. Seasonal campaigns were carried out (March/1995-March/1996) at eight sites of the island's littoral sites, selected according to the substrate characteristics (fine sands, sandy-silty, reedbed, and silty with great hydrophyte development). From the sites with a soft substrate, triplicate samples were extracted using a 225-cm2 Ekman manual dredge. The relative abundances of 71 taxa were measured: Nematoda, Turbelaria, Oligochaeta (23 sps.), Mollusca (21 sps.), Crustacea (11 sps.), Insecta (12 families), and Tardigrada. Macroinvertebrate density: 15-58,800 ind.m-2. Analysis of variance revealed significant differences between the average annual macroinvertebrate-population densities among the five sites (F: 3.059; p<0.05). Site 7 exhibited the highest density at 38,700±19,000 ind.m-2 Community parameters: diversity (H'; 0.77-2.16 bits); equitability (J; 0.16-1.02), and species richness (S; 3-29). Canonical-correspondence analysis indicated the environmental variables experiencing the greatest fluctuation to be: dissolved-oxygen concentration, pH, temperature, and conductivity. The results of this analysis suggest that macroinvertebrate-species distribution involves the physicochemical conditions of the water. Of the correlation between species and environmental variables, 95.5% were distributed on the canonical-correspondence ordering diagram's Axis 1. Functional feeding groups: In all sites and seasons, the gathering collectors predominated, followed by the scrapers, filtering collectors, shredders, and predators. Macroinvertebrate Index of Pampean-Rivers: values generally ranged from weak to weak-to-very-weak to zero pollution, but there was a high degree of pollution (2.4 and 1.5) in the spring of 1995.Fil: César, Inés Irma. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Departamento de Biología; Argentina. 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 Ciencias Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; ArgentinaFil: Martín, Stella Maris. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División de Zoología Invertebrados; ArgentinaFil: Colla, Maria Florencia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro de Investigaciones y Transferencia de Catamarca. Universidad Nacional de Catamarca. Centro de Investigaciones y Transferencia de Catamarca; Argentin

Study of Pulsed Light-Induced Damage on Saccharomyces cerevisiae in Apple Juice by Flow Cytometry and Transmission Electron Microscopy

This work analyzed the pulsed light (PL) (0.0-71.6 J/cm2)-induced damage on Saccharomyces cerevisiae KE162 cells in peptone water (pH 3.5 or 5.6) and apple juice (pH 3.5) by applying flow cytometry (FCM) and transmission electronic microscopy. Cells were labeled with fluorescein diacetate (FDA) for detecting membrane integrity and esterase activity and with propidium iodide (PI) for monitoring membrane integrity. S. cerevisiae inactivation curves reached 6-7 log reductions (peptone water systems) and 3.9 log reductions (apple juice) after 60 s (71.6 J/cm2) of PL exposure. FCM revealed the same damage pattern (although at different doses) in all media: at low doses, there was an increase in population in PI+-FDA+ quadrant, while at high doses, most of the population was located at quadrant PI+-FDA-, indicating that PL provoked rupture of the cytoplasm membrane allowing PI to penetrate cells and there was progressive loss of esterase activity. Comparison of conventional culture technique with FCM revealed the occurrence of certain cell subpopulations in peptone water with pH 3.5 which were stressed and lost their ability to grow in agar but still showed metabolic activity. Transmission electron microphotographs of PL-treated cells clearly indicated that various cell structures other than plasma membranes were altered and/or destroyed in a different degree depending on exposure time and type of medium.Fil: Ferrario, Mariana Inés. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Industrias; Argentina. Ministerio de Educación, Cultura, Ciencia y Tecnología. Secretaria de Gobierno de Ciencia Tecnología e Innovación Productiva. Agencia Nacional de Promoción Científica y Tecnológica. Fondo Argentino Sectorial; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria; ArgentinaFil: Guerrero, Sandra N.. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Industrias; ArgentinaFil: Alzamora, Stella Maris. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Industrias; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria; Argentin

Biodiversity and ecology of Hirudinea (Annelida) from the natural reserve of isla Martín García, Río de la Plata, Argentina

The Island of Martin Garcia lies at the confluence of the Uruguay and Paraná Rivers (upper Río de la Plata). This island is an outcrop of the crystalline basement. Due to basalt exploitation the island exhibits several ponds covered by carpets of free-floating macrophytes. Seven major environmental variables were measured: water and air temperature, percentage of oxygen saturation, dissolved oxygen, electrical conductivity, total dissolved solids and pH. Eleven leech species were found, Helobdella striata, H. diploides, H. adiastola and H. hyalina were new records. UPGMA clustering of species based on their occurrence in different ecological conditions revealed three main species groups. Canonical Correspondence Analysis (CCA) explained 97.2% of the correlation between species and environmental variables. H. triserialis shows the widest range of tolerance, H. hyalina shows positive relationships to conductivity; H. diploides shows a high correlation with dissolved oxygen, H. striata, H. lineata, and S. similis are negatively correlated with water temperature, and H. simplex is positively correlated with pH. Relationships between the species richness (S) and the sampling sites were negatively correlated with water temperature and positively correlated with dissolved oxygen. Leech biodiversity from the water bodies of Martín García Island, shows a great diversity of species and a wide plasticity regarding the characteristics of the environmental factors considered.A Ilha Mart&iacute;n Garc&iacute;a encontra-se na aflu&ecirc;ncia dos Rios Uruguay e Paran&aacute; (no Rio de la Plata superior) e constitui um afloramento do maci&ccedil;o cristalino de Bras&iacute;lia. Por causa da explora&ccedil;&atilde;o do basalto, formaram-se lacunas que apresentam tapetes de vegeta&ccedil;&atilde;o flutuantes e macr&oacute;fitas enraizadas. Mediram-se sete vari&aacute;veis f&iacute;sico-qu&iacute;micas da &aacute;gua: temperatura do ar e da &aacute;gua, porcentagem de satura&ccedil;&atilde;o de oxig&ecirc;nio, oxig&ecirc;nio dissolvido, condutividade el&eacute;trica, s&oacute;lidos totais dissolvidos e pH. Encontraram-se onze esp&eacute;cies de sanguessuga, como Helobdella striata, H. diploides, H. adiastola e H. hyalina que constituem novos registros para a ilha. A an&aacute;lise de agrupamento baseado na ocorr&ecirc;ncia das esp&eacute;cies em condi&ccedil;&otilde;es ecol&oacute;gicas diferentes revelou tr&ecirc;s grupos principais. A an&aacute;lise can&ocirc;nica da correspond&ecirc;ncia sugere que a distribui&ccedil;&atilde;o das esp&eacute;cies relaciona-se &agrave;s vari&aacute;veis ambientais consideradas, 97,2% da correla&ccedil;&atilde;o entre as esp&eacute;cies e as vari&aacute;veis se distribui no eixo dois do diagrama de ordenamento. As vari&aacute;veis com maior flutua&ccedil;&atilde;o foram a condutividade e o pH. H. triserialis foi a esp&eacute;cie mais tolerante &agrave;s vari&aacute;veis ambientais; H. hyalina se relacionou positivamente com a condutividade; H. diploides teve alta correla&ccedil;&atilde;o com o oxig&ecirc;nio dissolvido; H. striata, H. lineata e Semiscolex similis relacionaram-se negativamente com a temperatura da &aacute;gua e H. simplex, positivamente com o pH. As rela&ccedil;&otilde;es entre a riqueza de esp&eacute;cies (S) e os lugares de amostras foram negativas com a temperatura da &aacute;gua e positivas com o oxig&ecirc;nio dissolvido. Os corpos da &aacute;gua da Ilha Mart&iacute;n Garc&iacute;a mostram uma grande biodiversidade de esp&eacute;cies de sanguessuga, assim como uma ampla ductilidade com rela&ccedil;&atilde;o aos fatores ambientais considerados

Mollusks (Gastropoda and Bivalvia) of the multiple-use reserve martín garcía Island, Río de la plata river: biodiversity and ecology

The Island of Martin Garcia is located in the Upper Río de la Plata, to the south of mouth the Uruguay River. The aim of the present study was to analyse the biodiversity of the island freshwater mollusks and their relationships to environmental variables. Twelve sampling sites were selected, five were along the littoral section of the island and seven were Inland ponds. Seven major environmental variables were measured: water and air temperature, percentage of oxygen saturation, dissolved oxygen, electrical conductivity, total dissolved solids and pH. Twenty-seven mollusk species were found, Antillorbis nordestensis, Biomphalaria tenagophila tenagophila, B. t. guaibensis, B. straminea, B. peregrina, Drepanotrema kermatoides, D. cimex, D. depressissimum, Chilina fluminea, C. rushii, C. megastoma, Uncancylus concentricus, Hebetancylus moricandi, Stenophysa marmorata, Heleobia piscium, H. parchappii, Potamolithus agapetus, P. buschii, P. lapidum, Pomacea canaliculata, P. megastoma Asolene platae, Corbicula fluminea, Eupera platensis, Pisidium sterkianum, P. taraguyense and Limnoperna fortunei. UPGMA clustering of species based on their occurrence in different ecological conditions revealed two main species groups. The Canonical Correspondence Analysis suggests that the species distribution is related to the physico-chemical condition of water. Axis two of the ordination diagram displayed the approximately 95.6% of the correlation between species and environmental variables. Dissolved oxygen, conductivity, water temperature and pH showed the highest fluctuations during the sampling period. The species richness (S) showed relationships mainly with water temperature and conductivity. The biodiversity of the gastropods and bivalves from Martín García Island amounts to up to 26 species. Among the Gastropoda, the Planorbidae family made the most sizeable contribution. The Lithogliphidae P. agapetus (26.28%) and P. buschii (9.50%) showed the highest relative frequencies of occurrence within the littoral environments, while the Planorbidae D. cimex (23.83%) and D. kermatoides (11.59%) likewise did so in the inland ponds

A biodiversidade e a ecologia de hirudinea (<i>Annelida</i>) da reserva natural da ilha Martín García, na Argentina

The Island of Martin Garcia lies at the confluence of the Uruguay and Paraná Rivers (upper Río de la Plata). This island is an outcrop of the crystalline basement. Due to basalt exploitation the island exhibits several ponds covered by carpets of free-floating macrophytes. Seven major environmental variables were measured: water and air temperature, percentage of oxygen saturation, dissolved oxygen, electrical conductivity, total dissolved solids and pH. Eleven leech species were found, Helobdella striata, H. diploides, H. adiastola and H. hyalina were new records. UPGMA clustering of species based on their occurrence in different ecological conditions revealed three main species groups. Canonical Correspondence Analysis (CCA) explained 97.2% of the correlation between species and environmental variables. H. triserialis shows the widest range of tolerance, H. hyalina shows positive relationships to conductivity; H. diploides shows a high correlation with dissolved oxygen, H. striata, H. lineata, and S. similis are negatively correlated with water temperature, and H. simplex is positively correlated with pH. Relationships between the species richness (S) and the sampling sites were negatively correlated with water temperature and positively correlated with dissolved oxygen. Leech biodiversity from the water bodies of Martín García Island, shows a great diversity of species and a wide plasticity regarding the characteristics of the environmental factors considered.Facultad de Ciencias Naturales y Muse

A biodiversidade e a ecologia de hirudinea (<i>Annelida</i>) da reserva natural da ilha Martín García, na Argentina

The Island of Martin Garcia lies at the confluence of the Uruguay and Paraná Rivers (upper Río de la Plata). This island is an outcrop of the crystalline basement. Due to basalt exploitation the island exhibits several ponds covered by carpets of free-floating macrophytes. Seven major environmental variables were measured: water and air temperature, percentage of oxygen saturation, dissolved oxygen, electrical conductivity, total dissolved solids and pH. Eleven leech species were found, Helobdella striata, H. diploides, H. adiastola and H. hyalina were new records. UPGMA clustering of species based on their occurrence in different ecological conditions revealed three main species groups. Canonical Correspondence Analysis (CCA) explained 97.2% of the correlation between species and environmental variables. H. triserialis shows the widest range of tolerance, H. hyalina shows positive relationships to conductivity; H. diploides shows a high correlation with dissolved oxygen, H. striata, H. lineata, and S. similis are negatively correlated with water temperature, and H. simplex is positively correlated with pH. Relationships between the species richness (S) and the sampling sites were negatively correlated with water temperature and positively correlated with dissolved oxygen. Leech biodiversity from the water bodies of Martín García Island, shows a great diversity of species and a wide plasticity regarding the characteristics of the environmental factors considered.Facultad de Ciencias Naturales y Muse