Formação de professores (de matemática) em Barra do Garças – MT

Este artigo trata-se de parte de uma pesquisa em desenvolvimento, pelas autoras, no Instituto Federal de Mato Grosso (IFMT), campus de Barra do Garças, que tem por objetivo investigar o processo de formação de professores de Matemática em Barra do Garças, Mato Grosso, antes e após a implantação do curso superior nessa área na região (a partir de meados dos anos 1970 até final da década de 1980), ocorrido em 1981 na Universidade Federal de Mato Grosso (UFMT). Assim, no trabalho aqui apresentado, pretendemos expor alguns resultados que já pudemos considerar. Sendo ela uma pesquisa qualitativa, nos valemos da metodologia da História Oral, bem como de fontes escritas disponíveis, para constituir uma narrativa histórica, que aqui expomos, sobre esse aspecto da Educação Matemática na região de Barra do Garças. A UFMT, campus Médio Araguaia (Barra do Garças), foi e é um importante meio de formação docente da região, tendo sido a primeira instituição de nível superior a se instalar neste local

Biological invasions and the acoustic niche: the effect of bullfrog calls on the acoustic signals of white-banded tree frogs

Invasive species are known to affect native species in a variety of ways, but the effect of acoustic invaders has not been examined previously. We simulated an invasion of the acoustic niche by exposing calling native male white-banded tree frogs (Hypsiboas albomarginatus) to recorded invasive American bullfrog (Lithobates catesbeianus) calls. In response, tree frogs immediately shifted calls to significantly higher frequencies. In the post-stimulus period, they continued to use higher frequencies while also decreasing signal duration. Acoustic signals are the primary basis of mate selection in many anurans, suggesting that such changes could negatively affect the reproductive success of native species. The effects of bullfrog vocalizations on acoustic communities are expected to be especially severe due to their broad frequency band, which masks the calls of multiple species simultaneously.Rufford Small Grants Foundation [34.09.09]Rufford Small Grants FoundationConselho Nacional de Desenvolvimento Cientifico e Tecnologico [305473/2008-5, 476789/2009-5]Conselho Nacional de Desenvolvimento Cientifico e Tecnologic

Introduction pathways and socio-economic variables drive the distribution of alien amphibians and reptiles in a megadiverse country

Aims: We identify alien reptiles and amphibians, invaders or not, in Brazil and evaluate the following: (a) which alien species are found in the country; (b) where they originate from; (c) how they are distributed; (d) why and how they were introduced; and (e) which factors affect the record incidences and local richness of these species. Location: Brazil. Methods: We conduct a comprehensive survey of different data sources to collect records of alien amphibians and reptiles. We then use a causal model approach to evaluate the influence of space, climate, anthropogenic predictors, and introduction pathways on alien richness and number of records. Results: We find a total of 2,292 records of 136 species of alien reptiles and amphibians. Although species from many regions of the world can be found, most are snakes, lizards and anurans originating in the Americas. Although records of alien amphibians and reptiles are found throughout Brazil, they are concentrated in more economically developed areas. Socio‐economic measures have both a direct and indirect causal relationship over the distribution of alien species and affect all introduction pathways, which are key factors explaining the alien species’ distribution. Pet trade was directly related to alien diversity, while all the three introduction pathways contributed to explain the number of records. Main Conclusions: We reveal a high diversity of alien amphibians and reptiles widespread in an already megadiverse country. The finding that alien richness occurs in highly populated and wealthy areas and that it is linked to the pet trade helps to direct efforts towards the surveillance and prevention of the spread of alien species in Brazil. A higher record incidence is associated with species introduced accidentally or for human consumption, mainly represented by a few already invasive widespread species, impairing management measures

Universidade Federal de Mato Grosso e a formação de professores (de matemática) nas décadas de 1970 e 1980

O presente artigo visa tecer compreensões acerca da formação para professores (de Matemática) oferecida pela Universidade Federal de Mato Grosso (UFMT), sede Cuiabá, entre as décadas de 1970 e 1980, abordando, para isso, aspectos estruturais e formativos desta instituição. Para a constituição deste, sendo ele um recorte de nossa pesquisa de mestrado, Both (2014), nos valemos da metodologia da História Oral, por meio da qual constituímos fontes históricas, narrativas de nossos colaboradores, que, em auxílio as demais fontes localizadas, nos permitiram constituir a versão histórica, aqui exposta, para essa formação. A UFMT foi, e é até os dias atuais, um importante meio para formar professores, sendo ela a primeira universidade a se instalar no que hoje corresponde ao estado de Mato Grosso. Por fim, faz-se interessante destacar que o estudo, do qual aqui trazemos alguns aspectos, é parte de um projeto maior do Grupo História Oral e Educação Matemática (Ghoem), do qual participamos

Pet distribution modelling : Untangling the invasive potential of Trachemys dorbigni (Emydidae) in the Americas

Human activities have been changing the global biogeographic patterns by the introductions of invasive species. For reptiles, the invasion rate increase of non-native species is remarkably related to the pet trade, especially for freshwater turtles. Here we estimated the invasive potential of the South American turtle Trachemys dorbigni in the Americas using a combination of climatic and human activity variables. We built species distribution models based on data from the native and invasive ranges, using the ensemble model from five different algorithms (GAM, MAXENT, BRT, RF and GBM). We compared the two models’ performance and predictions, one calibrated with only climatic variables (climate-driven), and the second also included a descriptive variable of human activity (climate plus humandriven). Suitable areas for T. dorbigni covered occurrence areas of its congeners and highly diversified ecoregions, such as the eastern USA, the islands of Central America, and the south eastern and eastern Brazilian coast. Our results indicate that human activities allow T. dorbigni to establish populations outside of its original climatic niche. Including human activity variables proved fundamental to refining the results to identify more susceptible areas to invasion and to allow the efficient targeting of prevention measures. Finally, we suggested a set of actions to prevent T. dorbigni becoming a highly impacting species in the areas identified as more prone to its invasion

Reptile pet trade in Brazil : a regulatory approach to sustainable biodiversity conservation

The pet trade is the main cause of the growing number of exotic reptiles worldwide, posing a risk for invasion emergence and species extinction. In this study, we identify and analyze the obstacles involved in controlling the native and exotic reptile trade in Brazil to identify the main gaps and limitations in this regard. We propose measures that will aid in the planning of public policies that are more effective to protect native fauna. The pet trade regulation in Brazil is currently guided by poorly implemented policies. The main problems are associated with failures in legislation and enforcement, corruption, and lack of resources. As a result, the illegal trade control, current efforts for the sustainable use of biodiversity, and the prevention of the introduction of exotic species are insufficient. We recommend a multidisciplinary approach, based on actions to reduce legislation deficiencies and inconsistencies, intensification of inspection actions, and investment in educational actions aimed at raising societal awareness