Seasonal effects and antifungal activity from bark chemical constituents of Sterculia apetala (Malvaceae) at Pantanal of Miranda, Mato Grosso do Sul, Brazil

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Aspectos da biologia reprodutiva da arara-azul Anodorhynchus hyacinthinus (Latham, 1790) no mosaico Carajás-PA

Pós-graduação em Ciências Biológicas (Zoologia) - IBB

Removal of clay by stingless bees: load size and moisture selection

Some organisms disperse energy, associated with the transportation of resource, which is not necessarily food. Stingless bees of Central Amazonia (Melipona flavolineata and M. lateralis) collect clay in banks along streams for nest building. The moisture of the clay varies along the bank, and bees collect clay from specific location, indicating that there is some sort of preference regarding their selection. This study aims at identifying: if larger bees carry more clay; if there is a preference for moisture of substrates; and if bees are less efficient accumulating and transporting clay when it is wet. In order to do so, I measured the size of the bees and of the pellets of clay found in the corbicula. I set up a field experiment to test substrate preferences. The amount of clay transported, increased exponentially in accordance to the size of the bee, and the preferred substrate was the driest clay. The amount and the efficiency of removal of clay were not affected by the moisture of the substrate. Despite the wet clay being denser, it does not reduce the efficiency of exploitation of the resource, but suggests that bees spend more energy to carry the same quantity of wet clay, which may be the underlying mechanism explaining their preference for removing drier clay.

Biocontrole de formigas-cortadeiras utilizando o fungo Escovopsis

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

Patogenicidade de Syncephalastrum racemosum nos jardins de formigas cortadeiras

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

Diferenças individuais no comportamento forrageiro de Polistes versicolor Olivier, 1872 (Vespidae, Polistinae)

Pós-graduação em Ciências Biológicas (Zoologia) - IBRC

Sistemática e filogenia do fungo parasita Escovopsis associado às formigas Attini

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Metabolismo nutricional em Atta sexdens rubropilosa Forel, 1908: voo nupcial, fundação e desenvolvimento da colônia

Pós-graduação em Agronomia (Proteção de Plantas) - FCA

Diferenças comportamentais de poedeiras em diferentes ambientes térmicos

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Conteúdo energético das operárias da formiga cortadeira, Atta sexdens

The knowledge of the workers energy content is essential to measure the energy availability for maintenance and performance of activities essences for the colony growth. But little is known about the workers energy content, and how much will be available to carry out activities, for example, the excavation of the nest. The present study determined the lipid content and energy content of the worker ants inactive before and after excavation activity. Through the lipids determination, it can be calculated the energy content of workers resting (standing) with those which excavated. The lipid content and energy content of the workers were on average 9.1±0.8% and energy content of the workers was on average 111.31±54.71J, respectively, however, the experimental series did not differ significantly. Additionally, catabolic flux rate based in workers body mass was 14.76±10.11µW. It was concluded that the energy resource for the excavation of the nest is not coming from reserve lipid body, and thus the energy content of the workers did not change before and after excavation activity.

Influência do ambiente no desenvolvimento de colônias iniciais de formigas cortadeiras (Atta sexdens rubropilosa)

Annually, mature colonies of Atta ants produce winged males and females, where leave the colony in which they were produced to form new colonies and thus continue the species perpetuation. The foundation of Atta spp. colonies always involves high queen effort, solely responsible for growing the fungus and the care with itself and its offspring. During the foundation there is consumption of body reserves. This study investigated how the environment influences the development of newly founded colonies of leaf cutting ant, Atta sexdens rubropilosa. Therefore, it was compared field colonies collected five months after the nuptial flight and colonies maintained in the laboratory since the nuptial flight. It was analyzed the weight and size of the population (number of workers, larvae, pupae and eggs), the workers size, the volume and weight of the fungus garden and queen effort for the nest foundation (lipid content and weight of queens). In comparison to the field colonies, the laboratory colonies showed higher values in the weight and size of population, the volume and weight of the fungus garden. Measures of workers by class size did not vary between colonies from field and laboratory. The queen effort for nest foundation was higher in field colonies, which showed a lower percentage of fat and lower weight compared to laboratory colonies. These results show that the environment has a strong influence on the colonies development during the foundation, as well as on the physiological status of the queens, and therefore the survival, development and success of the colony, it is a reflection of the queen efforts and of the environment conditions.

Nest stolen: the first observation of nest predation by an invasive exotic marmoset (Callithrix penicillata) in an agricultural mosaic

Invasive exotic species can negatively impact local biodiversity. We present here a report of a nest predation of an endemic bird species, variable oriole (Icterus pyrrhopterus) by the introduced black-tufted marmoset (Callithrix penicillata)in an agricultural landscape highly disturbed by human activities. Two nestlings were predated, by adults of the introduced marmoset during two alternate days. Antipredator behavior and vocal mimicry were observed in variable oriole, while copulation was observed in black-tufted marmoset during the predation. The use of mobbing against predators by I. pyrrhopterus was observed and it is described here by the first time. The potential impact of the introduced marmosets to local biodiversity is discussed.

Entering behavior of Gasteruption brachychaetum Schrottky (Hymenoptera, Gasteruptiidae) into a nest of Hylaeus Fabricius (Hymenoptera, Colletidae)

Entering behavior of Gasteruption brachychaetum Schrottky (Hymenoptera, Gasteruptiidae) into a nest of Hylaeus Fabricius (Hymenoptera, Colletidae). Nests of Hylaeus aff. guaraniticus (Schrottky, 1906) were parasited by females of Gasteruption brachychaetum Schrottky, 1906 in trap nests in Sao Paulo(Brazil). This is the first host record of a Gasteruptiidae in the Neotropical Region. The behavior of a G. brachychaetum female entering a host's nest is described as follows: an inquiline female hovered near the host's nest, landed and detected that a female of H. aff. guaraniticus was inside the nest, waited for the host female to fly out, entered backwards into the nest, remained there for almost six minutes, and then went out the nest. The development time of immature stages of G. brachychaetum varied between 16 and 299 days.

Gamasoidosis illustrated: from the nest to dermoscopy

Gamasoidosis (acariasis, avian-mite dermatitis or bird-mite dermatitis) is a challenging diagnosis that is becoming more common because of the frequent use of window air conditioners in tropical countries. These devices may serve as shelters for nests of urban birds such as pigeons. Dermatologists should become familiar with this infestation to establish the correct diagnosis and treatment.

Pela Voz das Mulheres: uma análise da violência doméstica entre mulheres evangélicas atendidas no Núcleo de Defesa e Convivência da Mulher Casa Sofia

Essa dissertação tem por objetivo analisar a partir de uma perspectiva sociológica, um fenômeno social: o da violência doméstica entre mulheres evangélicas. Fenômeno este que nos preocupa profundamente e que, cada vez mais se manifesta. Este é um tema desafiador, que por vezes, em muitos espaços e lugares, inclusive nos religiosos, não inquietam o bastante e nem fomentam uma discussão mais intensa e rigorosa. Será, portanto, pelas vozes das mulheres que buscaremos identificar como as representações de gênero estruturam suas próprias vidas para lidarem com a questão da violência sofrida no espaço que deveria ser o lócus do afeto, do desenvolvimento da confiança, da auto-estima, do acolhimento, da compreensão e respeito, do ninho de amor e que são antagonicamente transformados, principalmente para as mulheres e crianças, no local para o qual gostariam de não voltar. Procuraremos compreender como a religião evangélica, de maneira sutil, simbólica ou de forma concreta, por sua teologia, pela prática pastoral, nos aconselhamentos ou na própria dinâmica da comunidade, trata a violência doméstica contra mulheres, solicitando o silêncio, a submissão, a espera do cumprimento das promessas de Deus em suas vidas: a libertação de seus maridos, companheiros. Uma troca: o silêncio pela promessa de uma família feliz. Invocação de representações sociais para justificarem ou ocultarem práticas violentas contra as mulheres, mas em nome de Deus. Entretanto, o que pensam e o que sentem essas mulheres? Elas realmente gostam de apanhar? São de fato cúmplices da violência sofrida? Por que resistem em denunciarem seus parceiros agressores e não rompem ou demoram tanto tempo para romperem relacionamentos violentos? Em que medida sua inserção religiosa está relacionada com essa situação de violência? Para tentar responder a essas perguntas, escolhemos como campo de pesquisa o Núcleo de Defesa e Convivência da Mulher Casa Sofia, uma ONG que atua com mulheres em situação de violência doméstica e sexual. Ao constatarmos o significativo número de mulheres evangélicas que ali são atendidas, nos propusemos analisar as representações religiosas de gênero e sua relação com a violência doméstica.(AU)