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URI permanente para esta coleçãohttps://bdc.icmbio.gov.br/handle/cecav/1481
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Item Population ecology of the freshwater turtle Mesoclemmys vanderhaegei (Testudines: Chelidae)(Herpetological Conservation and Biology, 2018-07-31) Brito, Elizângela Silva; Vogt, Richard Carl; Valadão, Rafael Martins; França, Leonardo Fernandes; Penha, Jerry Magno Ferreira; Strüssmann, ChristineWe sampled Mesoclemmys vanderhaegei in the Upper Paraguay River Basin, in the Cerrado ecosystem of Central Brazil. Populations were sampled between 2010 and 2013, and we used capture-mark-recapture methods to determine the catchability, density, population size structure, and sex ratio of the populations. We sampled two protected areas (Chapada dos Guimarães National Park [CGNP] and Serra das Araras Ecological Station [SAES]) and we captured 300 individuals (77 at CGNP and 223 at SAES) and made 343 recaptures in the two areas. Some individuals were recaptured more than once. We estimated population sizes to be 90 turtles at CGNP and 245 turtles at SAES. Sex ratio was not significantly different from 1:1 at CGNP, whereas at SAES there were more females than males. The population structure varied significantly between the two sampled populations with carapace lengths of turtles at CGNP normally distributed but not at SAES. Although both areas occur within the same ecosystem and are close to each other (180 km straight line distance), the populations possessed distinct demographic characteristics, possibly resulting from local patterns of environmental conditions and biological interactions.Item New records and distribution extension of Acanthochelys macrocephala (Rhodin, Mittermeier & McMorris 1984) in midwestern Brazil.(Cuad. herpetol., 2023) Dorado-Rodrigues, Tainá Figueras; Brito, Elizângela Silva; Silva, Karoline Rodrigues; Valadão, Rafael Martins; Cunha, Fábio Andrew Gomes; Strüssmann, ChristineItem O fogo e a herpetofauna no Pantanal(Biodiversidade Brasileira, 2024) Valencia-Zuleta, Alejandro; Richter, Aline; Alvarenga, Gabriela do Valle; Batista, Flavia Regina de Queiroz; Moreira, Leonardo Felipe Bairos; Arbo-Meneses, Bruna; Lustosa, Ana Paula Gomes; Strüssmann, Christine; Abrahão, Carlos Roberto; Côrtes, Lara GomesO Pantanal vem sofrendo diferentes ameaças ao longo dos anos, as quais têm alterado suas paisagens e prejudicado o pulso de inundação. Desde 2020, uma das maiores preocupações relativas à conservação de biodiversidade do bioma é a mudança do regime de fogo e os impactos dos grandes incêndios. O aumento na frequência e na intensidade de incêndios é uma das ameaças apontadas pela ciência como causa de declínio mundial das populações de anfíbios e répteis. O objetivo principal deste trabalho foi descrever os padrões observados na composição, distribuição e história natural das espécies de répteis e anfíbios amostrados durante e após os eventos de incêndio que vêm afetando o Pantanal desde 2020. Além disso, apontamos as dificuldades enfrentadas para estimar o impacto do fogo sobre a herpetofauna local e sugerimos aprimoramentos da metodologia utilizada. Os dados foram obtidos durante seis expedições, realizadas entre 2020 e 2023, em momentos hidrológicos distintos (seca e vazante) e em diferentes circunstâncias de amostragem: emergência e monitoramento. Emergência compreende os registros feitos durante eventos de incêndio e consistiu na contagem de animais mortos; enquanto o monitoramento, aplicado em momentos sem fogo, consistiu na amostragem passiva e ativa de animais vivos. Para cada espécie registrada durante as amostragens buscamos na literatura informações complementares sobre a categoria de risco de extinção, habitat e hábitos. Considerando as expedições e as diferentes metodologias aplicadas, contabilizamos 1708 registros de 45 espécies nos municípios de Barão de Melgaço e Poconé. A riqueza e abundância de anfíbios e répteis responderam de formas diferentes em campanhas emergenciais e no monitoramento. Os anfíbios de grande porte com hábitos terrestres ou semifossoriais, assim como as serpentes aquáticas e semiaquáticas, foram os grupos com maior número de carcaças registradas após os incêndios. Durante o monitoramento, entretanto, avistamentos de serpentes aquáticas foram muito reduzidos. Nesse contexto, destacamos a importância de estudos de monitoramento de longo prazo com metodologias adequadas às condições hidrológicas, grupo taxonômico e ocorrência de incêndios. Helicops boitata, uma espécie de cobra d’água endêmica do Pantanal, foi registrada apenas durante a campanha de contagem de animais mortos nos incêndios de 2020, realizada na estação seca. A recorrência de grandes incêndios na região pode representar forte ameaça para essa e outras espécies com hábitos semelhantes. O monitoramento contínuo de áreas amostradas durante incêndios é de extrema importância para identificar espécies resilientes ou intolerantes ao fogo e fundamental para o desenvolvimento de medidas de conservação adequadas para cada grupo taxonômico.Item Distance sampling surveys reveal 17 million vertebrates directly killed by the 2020’s wildfres in the Pantanal, Brazil.(Scientifc Reports, 2021-12) Tomas, Walfrido Moraes; Berlinck, Christian Niel; Chiaravalloti, Rafael Morais; Faggioni, Gabriel Paganini; Strüssmann, Christine; Libonati, Renata; Abrahão, Carlos Roberto; Alvarenga, Gabriela do Valle; Bacellar, Ana Elisa de Faria; Batista, Flávia Regina de Queiroz; Bornato, Thainan Silva; Camilo, André Restel; Castedo, Judite; Fernando, Adriana Maria Espinóza; Freitas, Gabriel Oliveira de; Garcia, Carolina Martins; Gonçalves2, Henrique Santos; Guilherme, Mariella Butti de Freitas; Layme, Viviane Maria Guedes; Lustosa, Ana Paula Gomes; Oliveira, Ailton Carneiro De; Oliveira, Maxwell da Rosa; Pereira, Alexandre de Matos Martins; Rodrigues, Julia Abrantes; Semedo, Thiago Borges Fernandes; Souza, Rafael Augusto Ducel de; Tortato, Fernando Rodrigo; Viana, Diego Francis Passos; Vicente‑Silva, Luciana; Morato, RonaldoAnthropogenic factors have significantly influenced the frequency, duration, and intensity of meteorological drought in many regions of the globe, and the increased frequency of wildfires is among the most visible consequences of human-induced climate change. Despite the fire role in determining biodiversity outcomes in different ecosystems, wildfires can cause negative impacts on wildlife. We conducted ground surveys along line transects to estimate the first-order impact of the 2020 wildfires on vertebrates in the Pantanal wetland, Brazil. We adopted the distance sampling technique to estimate the densities and the number of dead vertebrates in the 39,030 square kilometers affected by fire. Our estimates indicate that at least 16.952 million vertebrates were killed immediately by the fires in the Pantanal, demonstrating the impact of such an event in wet savanna ecosystems. The Pantanal case also reminds us that the cumulative impact of widespread burning would be catastrophic, as fire recurrence may lead to the impoverishment of ecosystems and the disruption of their functioning. To overcome this unsustainable scenario, it is necessary to establish proper biomass fuel management to avoid cumulative impacts caused by fire over biodiversity and ecosystem services.Item Reptilia, Squamata, Amphisbaenidae, Amphisbaena brasiliana (Gray, 1865): range extension.(Herpetology Notes, 2013) Dorado-Rodrigues, Tainá Figueras; Strüssmann, Christine; Lima, Francco Antonio Neri de Souza e; Valadão, Rafael Martins; Motta, TamíAmphisbaena brasiliana is a Brazilian endemic amphisbaenid (Bérnils and Costa, 2012) described after a single specimen obtained in the municipality of Santarém, state of Pará (Gray, 1865: 448). Besides the type locality and vicinities (Gans, 1971; Spencer, 2012), thespecies is known from other three municipalities in the same state: Belém (Gans, 1971), Aveiro (Rio Cupari; Strauch, 1883) and Parauapebas (" Serra dos Carajás " ; Cunha et al., 1985). Two vouchered but imprecise additional records from localities along the " rio Amazonas " (Amazon River), and one undocumented record for Paraíba do Norte, state of Paraíba, were mentioned by Gans (1971), but this latter record was considered by that author as " questionable ". The species has also been found in Guarantã do Norte, extreme north of the state of Mato Grosso (Mott and Vieites, 2009; Pinna et al., 2010), the southernmost record until now. Herein we report three new municipality records for Amphisbaena brasiliana in the states of Pará and Mato Grosso which greatly extend the known distribution of this species. In addition, we provide data on habitats and a photo of a live specimen. Specimens were collected under IBAMA/SISBIO permits # 02001.000822/2008-71 and # 19518-1, and voucher specimens are deposited at Coleção Zoológica de Vertebrados, Universidade Federal de Mato Grosso (UFMT; Cuiabá, Mato Grosso, Brazil). Records accessed through the HerpNET (Spencer, 2012) data portal are held in the Museum of Comparative Zoology (Harvard University, Cambridge, Massachusetts, USA). In December 2006, a single individual of Amphisbaena brasiliana (UFMT 7785) was found in a semi-deciduous forest in the right margin of the reservoir of the hydroelectric power plant Cabeça de Boi, rio Cabeça de Boi, municipality of Alta Floresta, Mato Grosso (10º 19' S, 56º 58' W). In October 2009, another individual (UFMT 8477) was found in an alluvial semi-deciduous forest on the left margin of the reservoir of Herpetology Notes, volume 6: XXX-XXX (2013) (published online on XX Xxxx 2013)Item New records and geographic distribution map of Elachistocleis magnus Toledo, 2010 (Anura: Microhylidae)(Check List, 2012-05-01) Strüssmann, Christine; Campos, Vitor Azarias; Rodrigues, Tainá Figueras Dorado; Almeida, Carlos Henrique L. N.; Toledo, Luís Felipe; Hoogmoed, Marinus Steven; Valadão, Rafael MartinsNew locality records and distribution map for the recently described Elachistocleis magnus are here presented. Originally described from Rondônia state, western Brazil (Amazonia), E. magnus was until now recorded for only two additional localities in the same state. The new records presented herein, which considerably enlarge the known range of the species, include three additional Brazilian states – Amazonas, Pará, and Mato Grosso (including records in the Brazilian Cerrado). We provide color description of the species in life, and discuss variation in habitats used by this species.Item New locality records, geographical distribution, and morphological variation in Cercosaura parkeri (Ruibal, 1952) (Squamata: Gymnophthalmidae) from western Brazil.(Check List, 2012-11-01) Barreto, Débora Soares; Valadão, Rafael Martins; Nogueira, Cristiano; de Castro, Carolina Potter; Ferreira, Vanda Lúcia; Strüssmann, ChristineThe presence of the gymnophthalmid lizard Cercosaura parkeri (Ruibal, 1952) in western Brazil is confirmed, based on vouchered records for localities in the states of Mato Grosso and Mato Grosso do Sul. Morphological variation in a series of 20 males and 17 females is also presented.Item Sexual dimorphism and morphometrics in two populations of the Neotropical freshwater turtle Mesoclemmys vanderhaegei (Testudines, Chelidae)(Iheringia Série Zoologia, 2022-02-25) Brito, Elizângela S.; Vogt, Richard C.; Ferraz, Rosa Helena S.; Strüssmann, Christine; Valadão, Rafael M.; Fernandes, zaias M.As commonly observed in turtles, sexual size dimorphism (SSD) is pronounced in the Neotropical freshwater turtle Mesoclemmys vanderhaegei (Bour, 1973), a species in which females are usually larger than males. We studied SSD in two populations of M. vanderhaegei from the Brazilian Cerrado savannah, based on 245 specimens captured between November 2010 and August 2013. The carapace length of the largest male was 201 mm (9.15% shorter than that of the largest female, 220 mm). The mean sizes of males and females did not differ in the two populations. However, a comparison of eight selected morphological variables revealed that the size distribution pattern differed between the populations. Using model selection, seven out of 34 morphometric variables - from the head, plastron, bridge, and tail - were selected as the most suitable ones to distinguish between males and females. The pattern of SSD found in M. vanderhaegei is similar to that found in other chelonian species and may be the result of natural selection rather than ecological factors, since individuals of both sexes use the same habitats.Item Diversity patterns of lizard assemblages from a protected habitat mosaic in the Brazilian Cerrado savanna(Journal of Tropical Ecology, 2022-05-16) Barros, Rafael Assis; Dorado-Rodrigues, Tainá Figueras; Valadão, Rafael Martins; Strüssmann, ChristineDifferences in habitat complexity and structure can directly influence the composition, diversity, and structure of species assemblages. Measurements of functional and phylogenetic diversity complement the commonly used measurements of taxonomic diversity, elucidating the relationships between species, their traits, and their evolutionary history. In this study, we evaluated how the mosaic of open and forested formations in a federal conservation unit in the western portion of the Brazilian Cerrado savanna influences the taxonomic, functional, and phylogenetic structure of lizard assemblages. Lizards were sampled for 15 months using pitfall traps set in open and forested formations. We recorded 292 lizards distributed among 16 species from eight families, with species composition differing among the formations. Richness was greater in the assemblages from open formations, while functional diversity and phylogenetic variability were greater in those of forested formations. Lizard assemblages in open formations were functionally and phylogenetically clustered, probably as a result of environmental filters acting on species, while the assemblages from forested formations were randomly structured. Different environmental and historical mechanisms have apparently shaped the current diversity of lizards in the region. This study shows that Cerrado vegetation mosaics can promote wide variation in different aspects of the taxonomic, functional, and phylogenetic structure from the lizard assemblages.