Los viajes de campo como estrategia pedagógico-didáctica en los estudios de grado en Ciencias Biológicas: un estudio de casos

El presente Trabajo Final Integrador elaborado en el marco de la Especialización en Docencia Universitaria, tiene como objetivo analizar y comparar la misión de las prácticas de campo en la formación de grado de los estudiantes de la Licenciatura en Ciencias Biológicas en dos establecimientos de enseñanza universitaria: Facultad de Ciencias Naturales y Museo (UNLP) y la Universidad Nacional de Chilecito. Las experiencias prácticas en el campo se reconocen históricamente como una herramienta particular de la enseñanza de las ciencias biológicas. Se ha definido el problema de indagación con un conjunto de interrogantes, metodología de campo, estrategias de relevamiento, reconstrucción de la información y análisis. Se pretende entrevistar a docentes con distintos cargos de ambas instituciones mediante una encuesta semiestructurada. Finalmente se pretende generar una caracterización situada que inspire a reflexionar e indagar sobre las problemáticas planteadas, las que se consideran indispensables para una buena práctica docente. El análisis interpretativo de esta indagación va a originar un conocimiento valioso para la reflexión de los docentes de grado de las ciencias biológicas sobre estas prácticas de campo tan valiosas para la disciplina.Facultad de Ciencias Naturales y Muse

Livestock management and dam removal allowed the recovery of an aquatic habitat for endangered frog and fish species in Argentinian Patagonia

Fil: Arellano, María Luz. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Zoología Vertebrados; ArgentinaFil: Velasco, Melina Alicia. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Zoología Vertebrados; ArgentinaFil: Quiroga, Sofía. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo; ArgentinaFil: Kass, Camila Alejandra. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Zoología Vertebrados; ArgentinaFil: Kass, Nicolas. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Zoología Vertebrados; ArgentinaFil: Kacoliris, Federico Pablo. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Zoología Vertebrados; Argentin

Livestock management and dam removal allowed the recovery of an aquatic habitat for endangered frog and fish species in Argentinian Patagonia

Placement of fencing around a stream to prevent livestock damage and water flow restoration via removal of a dam allowed riparian and aquatic vegetation recovery (76%) in less than one month. This subsequently allowed the reintroduction of a Critically Endangered frog as well as protection of an Endangered fish species.Facultad de Ciencias Naturales y MuseoConsejo Nacional de Investigaciones Científicas y Técnica

Livestock management and dam removal allowed the recovery of an aquatic habitat for endangered frog and fish species in Argentinian Patagonia

Placement of fencing around a stream to prevent livestock damage and water flow restoration via removal of a dam allowed riparian and aquatic vegetation recovery (76%) in less than one month. This subsequently allowed the reintroduction of a Critically Endangered frog as well as protection of an Endangered fish species.Facultad de Ciencias Naturales y MuseoConsejo Nacional de Investigaciones Científicas y Técnica

Aurivela longicauda (Red-tailed Teiid). Predation

Aurivela longicauda is an endemic lizard from the Monte Desert region of western Argentina. It is an agile lizard that is typically observed during the warm hours of the day, where it inhabits sedimentary sand or dunes with a few shrubs and scattered ground vegetation. The aim of this note is to report an observation of an A. longicauda being preyed upon by an Argentine dwarf spider, Grammostola mendozae. The predation of vertebrates by arthropods is documented worldwide. The predation event was recorded in Talampaya National Park (TNP), located in an extensive plain of the Monte region (29.8°S, 67.833°W, WGS 84; 1300 m elev.) in the center-west of La Rioja Province (Argentina), which was designated as a UNESCO World Heritage Site in 2000. At 1310 h on 11 November, during pitfall trap surveys in TNP, we found the spider feeding on the right portion of the skull, including the right eye, of an adult A. longicauda. After a few minutes, the spider dragged the lizard for a few centimeters and let it go. The lizard was collected and housed at Museo de La Plata Herpetological Collection. Our observation is the first record of predation on A. longicauda by G. mendozae.Fil: Kass, Camila Alejandra. Universidad Nacional de Chilecito. Instituto de Ambientes de Montaña y Regiones Áridas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Kass, Nicolás Ariel. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Zoología de Vertebrados. Sección Herpetología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Calvo, Rodrigo. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Zoología de Vertebrados. Sección Herpetología; ArgentinaFil: Castillo, Martin Cristian. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo; ArgentinaFil: Torres, Adriana Marilyn. Universidad Nacional de Chilecito; ArgentinaFil: Juri, María Dolores. Universidad Nacional de Chilecito; Argentin

A new threat for the endangered frog <i>Atelognathus reverberii</i> (Anura: Batrachylidae) in Argentinean Patagonia

Atelognathus reverberii is an endemic terrestrial frog that inhabits volcanic clay lagoons. A fieldwork was conducted to assess the population status of the Laguna Raimunda Frog on 19 February 2015. A total of 441 individuals of Atelognathus reverberii was found trapped in a water pit dug in the ground about 15 m from the shore of a semi-permanent volcanic clay lagoon, with an extension of about 0.4 km2. Eleven of them were already dead. After the incident, the 430 live individuals were released in the shore of the lagoon and a fence was placed around the pit to avoid more incidental mortality of Laguna Raimunda Frogs. The water pit was 0.6 m in diameter and 1.5 m deep, and the height of the water level was 30 cm. Dehydration inside these water pits was observed twice. Other threats to the Laguna Raimunda Frog are its reduced geographical distribution, restricted up to 100 m from the edge of water bodies, and the degradation of its reproductive habitat by the extensive cattle farming.Facultad de Ciencias Naturales y Muse

Primer registro de la sanguijuela Oxyptychus inexpectatus depredando sobre Pleurodema somuncurense y Rhinella arenarum en la Meseta de Somuncura, Río Negro, Argentina

Fil: Velasco, Melina Alicia. División Herpetología. Facultad de Ciencias Naturales y Museo. Universidad Nacional de La Plata; ArgentinaFil: Gullo, Bettina Sandra. Cátedra de Zoología Invertebrados I. Facultad de Ciencias Naturales y Museo. Universidad Nacional de La Plata; ArgentinaFil: Kacoliris, Federico Pablo. División Herpetología. Facultad de Ciencias Naturales y Museo. Universidad Nacional de La Plata; ArgentinaFil: Kass, Camila Alejandra. División Herpetología. Facultad de Ciencias Naturales y Museo. Universidad Nacional de La Plata; ArgentinaFil: Carrera, Joaquín Daniel. División Herpetología. Facultad de Ciencias Naturales y Museo. Universidad Nacional de La Plata; Argentin

Diet of critically endangered Valcheta frog, Pleurodema somuncurense (Anura: Leptodactylidae), in the Somuncura Plateau, Patagonia, Argentina

In this work, we studied the diet of Pleurodema somuncurense and assessed selection patterns based on resource availability of terrestrial and aquatic prey items. We discuss potential implications for the current conservation status of this species and for management actions conducted with this species. Pleurodema somuncurense is endemic to the Valcheta Stream, Somuncura Plateau, Patagonia, Argentina. The conservation status of this frog is Critically Endangered, according to the IUCN red list. Our analysis frameworkwas based on assessing the diet composition in frogs through stomach flushing technique versus prey availability in the habitat. We also estimated the relative importance for each consumed prey. Of the 55 sampled individuals, we found identifiable contents in 47 stomachs.Our results showed that diet sample is composed of 179 prey items, most of them arthropods, including aquatic and terrestrial preys. The highest IRI was for Diptera (mostly from Family Tipulidae), Lepidoptera (Family Tineidae), Amphipoda (Family Hyalellidae), Araneae (mostly from Family Linyphiidae) and Isopoda (Family Armadillidiidae). The highest volumetric percentage was for Lepidoptera and Diptera. The use versus availability test showed active prey selection of P. somuncurense for Armadillidium isopods, and rejection of several prey items, particularly ants that were the most abundant terrestrial item. This dependence on terrestrial preys makes P. somuncurense susceptible to the ndirect effect on land use that affect prey availability, at least on aestival months when diet samples were taken.Fil: Velasco, Melina Alicia. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Zoología de Vertebrados. Sección Herpetología; ArgentinaFil: Akmentins, Mauricio Sebastián. Universidad Nacional de Jujuy. Instituto de Ecorregiones Andinas. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta. Instituto de Ecorregiones Andinas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; ArgentinaFil: Kass, Camila Alejandra. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Zoología de Vertebrados. Sección Herpetología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina. Universidad Nacional de Chilecito. Departamento de Ciencias Basicas y Tecnologicas; ArgentinaFil: Williams, Jorge Daniel. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Zoología de Vertebrados. Sección Herpetología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; ArgentinaFil: Kacoliris, Federico Pablo. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Zoología de Vertebrados. Sección Herpetología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentin

A management strategy for the long-term conservation of the Endangered sand-dune lizard <i>Liolaemus multimaculatus</i> in the Pampean coastal dunes of Argentina

The sand-dune lizard Liolaemus multimaculatus is an Endangered species endemic to the Pampean coastal dunes of Argentina. To inform the development of a future Action Plan for this species, we investigated the demography and conservation status of all remaining populations, and we suggest management actions appropriate to local needs. We used population viability analysis to assess extinction risk in three inbreeding scenarios and estimate the minimum viable population and the minimum area requirement. To assess the current status of each local population, we used information related to population size, human pressure and connectivity. The results were then used to set and prioritize conservation management actions at local level. Our models indicated that populations of > 2,400 individuals would be viable in the long term and that inbreeding depression has a strong effect on extinction risk. The southern patches of coastal dune contain the largest populations of sand-dune lizards, and they are also better connected and less threatened. We suggest land protection as the priority management action for populations larger than the minimum viable population, whereas habitat recovery, when possible, should be the priority for patches of coastal dune smaller than the minimum area requirement. Supplementation with a small number of individuals could stabilize unviable populations but should be considered only in certain situations.The long-term conservation of the sand-dune lizard will be feasible only if a conservation action plan is developed and implemented.Facultad de Ciencias Naturales y Muse

Inventário da herpetofauna do Parque Nacional Talampaya, Patrimônio da Humanidade, na Argentina

Talampaya National Park (TNP) was designated a UNESCO World Heritage Site, together with Ischigualasto Provincial Park in 2000, but there is no list with updated information from reptiles and amphibians eighteen years after its creation. Therefore, we listed a complete inventory of the herpetofauna of TNP with the information obtained from bibliography, data from Argentina National Parks Administration (ranger reports and the species listed in their database) and fieldwork using pitfall traps, active search transects and pictures/material collected in the site. We confirm the occurrence of 35 species of herpetofauna in the TNP, including 29 reptiles and 6 amphibians. Some species found in TNP are of great value because their national conservation status is vulnerable (Chelonoidis chilensis, Liolaemus anomalus, Liolaemus riojanus) or even endangered (Boa constrictor occidentalis). Therefore, priority areas for conservation of these species should be proposed inside the park. Keywords: amphibians, conservation area, list of species, reptiles.O Parque Nacional Talampaya (TNP) foi declarado Patrimônio da Humanidade pela UNESCO, juntamente com o Parque Provincial Ischigualasto, em 2000, mas não há lista com informações atualizadas de répteis e anfíbios 18 anos após sua criação. Portanto, listamos um inventário completo da herpetofauna do TNP com as informações obtidas na bibliografia, dados da Administração de Parques Nacionais da Argentina (relatórios de guardas florestais e as espécies listadas em seu banco de dados) e trabalho de campo usando armadilhas de queda, transecções de pesquisa ativa e fotos/material coletado no site. Confirmamos a presença de 35 espécies da herpetofauna no TNP, incluindo 29 répteis e 6 anfíbios. Algumas espécies encontradas no TNP são de grande importância, pois seu estado de conservação nacional é vulnerável (Chelonoidis chilensis, Liolaemus anomalus, Liolaemus riojanus), ou mesmo em perigo (Boa constrictor occidentalis). Assim, áreas prioritárias para a conservação dessas espécies devem ser propostas para o parque.Palavras-chave: anfíbios, lista de espécies, répteis, unidade de conservação