Foraging activity of Protopolybia exigua (Hymenoptera, Vespidae) in different phases of the colony cycle, at an area in the region of the Médio São Francisco River, Bahia, Brazil

In this work, the foraging activity of Protopolybia exigua (de Saussure) was studied, aiming to verify the amplitude of the foraging time, the relation between the physical factors of weather (temperature, relative air humidity, luminosity and wind speed) and the daily activity of searching for resources, as well as to analyze the influence of the colony development phases and the number of individuals (adults and immatures) engaged in such activity. The study was carried out in two areas of the city of Bom Jesus da Lapa, Bahia, Brazil, during the period from January to June 2006, when the observation of 12 colonies of P. exigua was performed. The results revealed this species presented an amplitude of activity of almost 13 hours. There was an average of 44.4 nest exits and 37.6 returns a day by the nest workers and the Returns with Resources Index for this species was 93.5%. The foraging activity increased as of 10:01, and became more intense, with the peak from 1:01 p.m. to 4:00 p.m., when the highest temperatures (°C) and the lowest values of relative air humidity (%) were observed. The colonies that had a larger number of larvae presented a higher average number of trips to the field per hour (10.94) and the number of females in the colony tends to induce foraging activity. There were no differences between the numbers of nest exits by the workers regarding the three phases of colony development.

Biologia comportamental de Synoeca surinama: enxameio e interações socias (Vespidae, Polistinae: Epiponini)

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Utilização de membrana biossintética de celulose em trocleoplastia experimental em cães

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Horários de atividade forrageadora e itens coletados por Protopolybia exigua (de Saussure) (Hymenoptera, Vespidae) na região do médio São Francisco, Bahia

Pós-graduação em Ciências Biológicas (Zoologia) - IBRC

Avaliação da recuperação das lesões cutâneas por meio da terapia larval utilizando como modelos ratos Wistar

Pós-graduação em Biologia Geral e Aplicada - IBB

Estrutura e composição da comunidade de Trichoptera (Insecta) de rios e áreas alagadas da bacia do rio Suiá-Miçú, Mato Grosso, Brasil

A composição, abundância e riqueza de Trichoptera imaturos foram estudadas em 12 tributários da bacia do rio Suiá-Miçú, afluente do rio Xingu, um mosaico de áreas alagadas, córregos e rios na área de transição Cerrado - Floresta Amazônica na região leste de Mato Grosso, Brasil. Larvas de insetos aquáticos foram amostradas em transectos nas margens de tributários lênticos e lóticos com tamanho e níveis de conservação variáveis, em três períodos entre 2007 e 2008. Foram coligidas 867 larvas (sete famílias, 17 gêneros, 45 morfoespécies), sendo Hydropsychidae e Leptoceridae as famílias mais abundantes e ricas, e Leptonema sparsum a espécie mais abundante (n=370). Houve perda de riqueza de espécies em ambientes impactados e naqueles de maior porte ou de fluxo lêntico. Foi possível detectar variações na composição relacionadas ao fluxo, tipo de vegetação e na interação entre o nível de conservação e fluxo. O nível de conservação, a largura e o índice quantitativo de integridade de hábitat (IIH) não influenciaram a composição de Trichoptera isoladamente. Estes resultados podem fomentar novas investigações dos efeitos dos impactos sobre a composição da entomofauna aquática na transição entre o Cerrado e a Floresta Amazônica.

Bioecologia comparada de duas espécies de Cyphomyrmex Mayr (Formicidae: Myrmicinae)

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Aspectos semioquímicos e visuais no comportamento de ovipostura em Chrysomya Megacephala (Fabricius) (Diptera: Calliphoridae)

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Reproductive biology of Hepatus pudibundus (Crustacea: Brachyura), the most abundant crab on the southeastern Brazilian coast

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Landscape Diversity Influences Dispersal and Establishment of Pest with Complex Nutritional Ecology

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Desenvolvimento de Zaprionus indianus Gupta, 1970 (Diptera: Drosophilidae) em diferentes dietas

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Efeito de temperaturas alternadas sobre desenvolvimento de Aedes (Stegomyia) aegyoti (L.) (Diptera: Culicidae)

Aedes (Stegomyia) aegypti is a species of mosquitoes known to be the vector of diseases such as dengue and yellow fever, and a better understanding of aspects of their biology can help in the establishment of control strategies for the same. Several previous studies showed that temperature significantly affects the development of immature stages of insects. In general, higher temperatures (up to a threshold) accelerate the development of insects, and lower temperature retards the same. This rule also applies to mosquitoes, including Ae. aegypti. But not still know the effects of daily variation of temperature on the developmental stages of mosquitoes. And this detail is very important, since in natural breeding or artificial, The mosquitoes usually face temperature variations over a single day, which should interfere with its development until the emergence of the adult forms. For this reason, the objective of this study is to analyze the effect of alternating temperatures on the development of Ae. aegypti. To conduct the study, adults were collected active in the neighborhood Bela Vista Campus of UNESP - Rio Claro, SP, using a sweep net or using ovitraps for immatures, and the active search for breeding. Individuals collected were kept under experimental conditions in the laboratory. The adult samples were identified to species level, were considered for the experiments, only samples of Ae. aegypti. The insects were housed in plastic cages, suitable for creating flies. These were fed with sugar solution and blood meal on alternate days. The eggs obtained were used in the experiment with four different temperature regimes. The data collected were analyzed by evaluating whether the different treatments influenced the development of immature to adult, performing the Kruskal-Wallis test and the statistical software BioEstat. Statistical analysis of the sex ratio... (Complete abstract click electronic access below)

Biologia e ecologia comportamental da vespa eussocial primitiva Mischocyttarus (Megacanthopus) parallelogrammus (Hymenoptera, Vespidae)

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Aquatic macrophytes as feeding site for small fishes in the Rosana Reservoir, Paranapanema River, southeastern Brazil

In the present investigation we studied the feeding habits of the fishes associated with aquatic macrophytes in the Rosana Reservoir, southeastern Brazil. Twenty fish species were collected during four field trips, regularly distributed across the dry and wet seasons. Focal snorkeling observations of the fishes were made over a total of six hours. Nine species were present in abundances of more than 1% and, therefore, had their feeding habits analyzed. Hemigrammus marginatus, Roeboides paranensis, Hyphessobrycon eques, Astyanax altiparanae, Serrasalmus spilopleura, and Bryconamericus stramineus were predominantly invertivores, with predominance of aquatic insects (Diptera, Ephemeroptera, and Trichoptera immatures) among their food items. The predominantly algivores were Apareiodon affinis, Serrapinnus notomelas, and Satanoperca pappaterra, with high frequency of filamentous blue-green algae, diatoms, clorophyts, and periderm. The different microhabitat exploitation plus diet composition suggests partitioning of resources and absence of food competition among the most representative fish species in the studied community, indicating the importance of the naturalistic approach to fish ecology studies.

Diversidade e sazonalidade de ácaros (Acari) em seringal (Hevea brasiliensis, Muell. Arg.) no Noroeste do Estado de São Paulo

Brazilian southeastern region has soil and climate conditions suitable for the growing of rubber trees, and most part of national yield arises from São Paulo State. The aims proposed for this work were to determine the diversity, the richness and the seasonal occurrence of mites found in a rubber tree crop in a triennial survey with monthly samplings, as well as to estimate the populational density of the major phytophagous species. This study found 74,407 mites from 26 species belonging to 10 families. The phytophagous and predators represented 95.4% and 3.9% of the total abundance, respectively. Twelve species were rare, six accessories and eight constant. The families Phytoseiidae and Tydeidae had the greatest richness (five and four species, respectively). The most numerous species was Calacarus heveae Feres (50,573), with great abundance at the end of rainy season until the beginning of dry season. Among predators, the most abundant were Zetzellia quasagistemas Hernandes & Feres (1,345), Pronematus sp. (455), Zetzellia agistzellia Hernandes & Feres (409) and Euseius citrifolius Denmark & Muma (243). C. heveae had greatest densities on March and April 2003, and Lorryia formosa Cooreman and Tenuipalpus heveae Baker on March and May 2001, respectively. Many stigmaeids were observed in association with colonies of L. formosa preying their eggs and immatures.