Encontrados 12 documentos, a visualizar página 1 de 2
Patterns of avian malaria in tropical and temperate environments : testing the ...
Itabaiana, Yasmine Antonini; Lobato, Débora Nogueira Campos; Norte, Ana Cláudia; Ramos, Jaime Albino; Moreira, Patrícia de Abreu; Braga, Érika MartinsAccording to the enemy release hypothesis (ERH) the spread of invasive species will be facilitated by release from their enemies as they occupy new areas. However, the ERH has rarely been tested by comparing populations of native (non-invasive, long established) species with expanding or shifting ranges, to the same species as invasive in another area. We tested the ERH with respect to blood parasite levels (pr...
Compositional changes in bee and wasp communities along Neotropical mountain al...
Perillo, Lucas Neves; Neves, Frederico de Siqueira; Itabaiana, Yasmine Antonini; Martins, Rogério ParentoniClimate conditions tend to differ along an altitudinal gradient, resulting in some species groups' patterns of lower species richness with increasing altitude. While this pattern is well understood for tropical mountains, studies investigating possible determinants of variation in beta-diversity at its different altitudes are scarce. We sampled bee and wasp communities (Hymenoptera: Aculeata) along an altitudin...
Adaptação : um tema transversal da biologia em atividades científicas capazes d...
Pires, Maria Rita Silvério; Itabaiana, Yasmine Antonini; Scalon, Viviane Renata; Sousa, Hildeberto Caldas de; Sant'Anna, Eneida Maria EskinaziA Universidade Federal de Ouro Preto (UFOP), através da atividade de extensão Ciência e Escola tem integrado a Educação Básica (EB) com o Ensino Superior (ES), estimulado alunos em diferentes ciclos escolares a desenvolverem o pensamento científico através de atividades experimentais estruturadas a partir de um tema, nesta ocasião ADAPTAÇÃO. As atividades experimentais foram realizadas durante uma semana em lab...
Feeding behavior by hummingbirds (Aves: Trochilidae) in artificial food patches...
Lanna, Lucas L.; Azevedo, Cristiano Schetini de; Claudino, Ricardo Marcelino; Oliveira, Reisla Silva de; Itabaiana, Yasmine AntoniniDuring flight, hummingbirds achieve the maximum aerobic metabolism rates within vertebrates. To meet such demands, these birds have to take in as much energy as possible, using strategies such as selecting the best food resources and adopting behaviors that allow the greatest energy gains. We tested whether hummingbirds choose sources that have higher sugar concentrations, and investigated their behaviors near ...
Onde os mais adaptados permanecem : comunidade de abelhas sem ferrão (Hymenopte...
Araújo, Gustavo Júnior de; Itabaiana, Yasmine Antonini; Silva, Luíza Santos; Mucci, Georgina Maria FariaA urbanização tem causado a fragmentação de vários ambientes naturais, levando à perda de muitos processos ecológicos como a polinização, realizada principalmente por abelhas, em especial as espécies de Meliponini, que tem reduzido drasticamente as suas populações devido à perda de habitat pela expansão urbana. O objetivo deste estudo foi realizar um levantamento das espécies de abelhas sem ferrão em áreas urba...
Impact of resource availability on bee diversity.
Araújo, Vinícius Albano; Araújo, Ana Paula Albano; Itabaiana, Yasmine AntoniniResource availability is an important predictor of abundance and species richness. In this paper we veri!ed why there is local variation in bee diversity testing the hypothesis that bee species richness and abundance will increase with increasing resource availability. Resource availability was considered here as the number of "owering plants and the number of plant species. Sampling was carried out at two site...
Evaluation of matrix effect on the determination of rare earth elements and As,...
Oliveira, Fernanda Ataide de; Abreu, Adriana Trópia de; Nascimento, Nathália de Oliveira; Froes, Roberta Eliane Santos; Itabaiana, Yasmine AntoniniBees are considered the main pollinators in natural and agricultural environments. Chemical elements from honey and pollen have been used for monitoring the environment, the health of bees and the quality of their products. Nevertheless, there are not many studies on honey and pollen of native Brazilian bees. The goal of this work was to determine important chemical elements (Sc, Y, La, Ce, Pr, Nd, Sm, Eu, Gd, ...
Patterns of orchid bee species diversity and turnover among forested plateaus o...
Itabaiana, Yasmine Antonini; Machado, Carolina de Barros; Galetti Júnior, Pedro Manoel; Oliveira, Marcio; Dirzo, RodolfoThe knowledge of spatial pattern and geographic beta-diversity is of great importance for biodiversity conservation and interpreting ecological information. Tropical forests, especially the Amazon Rainforest, are well known for their high species richness and low similarity in species composition between sites, both at local and regional scales. We aimed to determine the effect and relative importance of area, ...
Orchid bee fauna responds to habitat complexity on a savanna area (Cerrado) in ...
Itabaiana, Yasmine Antonini; Silveira, Rodrigo Assunção da; Leandro, Cristiane Martins; Oliveira, Reisla Silva deHere we investigated responses of orchid bee assemblages to habitat complexity, with the aim of assessing complexity as a useful surrogate for species diversity of this group. For the purposes of our study, we defined habitat complexity as the heterogeneity in the arrangement in physical structure of habitat (vegetation), although there is a large range of operational definitions in the literature. We test the ...
Descriptive ecology of bat flies (Diptera: Hippoboscoidea) associated with vamp...
Aguiar, Ludmilla Moura de Souza; Itabaiana, Yasmine AntoniniWe studied the ectoparasitic bat flies of three phyllostomid vampire bat species. Bats were collected monthly from April 2004-March 2005 in caves within the Cafuringa Environmental Protection Area in the Federal District of Brazil. A total of 1,259 specimens from six species in the Streblidae family were collected from 332 bats. High host affinity from the sampled bat fly species and high prevalence of bat flie...