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There is a growing need to discover and develop alternative therapies for the treatment of mastitis caused by Staphylococcus spp. and multidrug-resistant bacterial infections. This study examined the chemical composition and antimicrobial potential of two propolis extracts (EPA and EPB) against seventy-seven isolates of Staphylococcus spp. obtained from subclinical bovine mastitis; three clinical strains of MRSA and two from clinical strains of S. aureus ATCC, identified as S. aureus ATCC 6538 and S. aureus ATCC 25923. The total phenolic content was determined by the Folin-Ciocalteau method, the total flavonoid content by the Dowd method and the phenolic profile was quantified by HPLC-DAD. The MBC values of the extracts were evaluated by broth microdilution method. The amount of total phenolic and flavonoid compounds was higher in EPA than EPB. Both extracts revealed the presence of caffeic, coumaric, cinnamic, ferulic and 3,4-dihydroxybenzoic acids, with higher concentrations of coumaric and cinnamic acids. Staphylococcus spp. isolates were susceptible to EPA (90.9%), EPB (83.1%) and oxacillin (80.5%). The oxacillin susceptible isolates were also susceptible to EPA (70.1%) and EPB (80.6%), whereas those oxacillin-resistant strains were also susceptible to EPA (40.0%) and to EPB (26.7%). MBC ranged from 34.3 to 68.7μm/mL for EPA and from 68.7 to 137.5μg/mL for EPB. Both extracts inhibited significantly (100%) the clinical strains of MRSA, S. aureus ATCC 6538 and S. aureus ATCC 25923 at the concentration of 68.7μg/mL. It is concluded that both extracts of propolis, whose main constituents are coumaric and cinnamic acids, have high antimicrobial activity against the microorganisms studied, and EPA also against oxacillin-resistant strains. These findings reinforce its potential use for the treatment of bovine mastitis. RESUMO: É cada vez mais oportuna a necessidade de descobrir e desenvolver terapias alternativas para tratamento da mastite causada por Staphylococcus spp. e de infecções bacterianas multirresistentes. Este estudo examinou a composição química e o potencial antimicrobiano de dois extratos etanólicos de própolis (EPA e EPB) contra setenta e sete isolados de Staphylococcus spp. obtidos a partir de mastite bovina subclínica; três estirpes clínicas de MRSA e duas de linhagens clínicas de S. aureus ATCC, identificadas como, S. aureus ATCC 6538 e S. aureus ATCC 25923, ambas metacilina resistentes. O teor total de fenólicos foi determinado pelo método de Folin-Ciocalteau, o teor de flavonoides totais pelo método Dowd e o perfil fenólico foi quantificado por HPLC-DAD. CBM dos extratos foi avaliada pelo método de microdiluição em caldo. A quantidade total de compostos fenólicos e flavonoides foi maior no EPA do que no EPB. Ambos os extratos revelaram a presença dos ácidos cafeico, cumárico, cinâmico, ferúlico e 3,4-di-hidroxibenzóico, com maiores concentrações de ácidos cumárico e cinâmico. Os isolados de Staphylococcus spp. foram sensíveis a EPA (90,9%), EPB (83,1%) e oxacilina (80,5%). Os isolados suscetíveis à oxacilina também foram suscetíveis ao EPA (70,1%) e ao EPB (80,6%), enquanto os do resistente à oxacilina foram suscetíveis ao EPA (40,0%) e ao EPB (26,7%). MBC variou de 34,3 a 68,7μm/mL para EPA e de 68,7 a 137,5μg/mL para EPB. Ambos os extratos inibiram significativamente (100%) as linhagens clínicas de MRSA, S. aureus ATCC 6538 e S. aureus ATCC 25923 na concentração de 68,7μg/mL. Conclui-se que os extratos etanólicos da própolis, cujos principais constituintes são os ácidos cumário e cinâmico, possuem atividade antimicrobiana contra os micro-organismos estudados, e o EPA também contra as cepas resistentes à oxacilina. Estes achados reforçam seu potencial uso para o tratamento da mastite bovina.

Previous investigations showed that diverse varieties of melon may have different attractiveness for bees. Therefore, the objective of this study was to evaluate the composition, frequency and behavior of flower visitors of some melon (Cucumis melo) cultivars (Amarelo, Pele de Sapo, Cantaloupe,Gália) in different conditions (conventional and organic farming, dry and rainy seasons, with and without mulching and introduction or not of honey bee hives) in the main production poles in the Brazilian Northeast (Petrolina-PE/Juazeiro-BA, Pacajus-CE and Mossoró-RN). Observations and collections of flower visitors occurred from 5p.m. to 6p.m, in non-consecutive days. We recorded 12 species of insects, mostly bees. The most frequent was Apis mellifera (99.68%), but other species appeared sporadically (less than 0.5%): Xylocopa grisescens, Trigona spinipes, Plebeia sp., Melipona mandacaia, Frieseomelitta doedereleini, Halicitidae. Apis mellifera was present in all studied cultivars and sites. Xylocopa grisescens appeared in two poles, but not in Pacajus-CE, Amarelo cultivar. In addition, Trigona spinipes, although present in the three poles, was not recorded on Pele de Sapo. The Amarelo cultivar, under organic farming, without the use of mulching, and presence of honey bee hives, in the Petrolina-PE/Juazeiro-BA pole, in the dry season, was the combination of factors showing the largest number of Apis mellifera as the main visitor of melon flowers. Investigações anteriores mostraram que cultivares diversas de meloeiro podem apresentar diferente atratividade para abelhas. Portanto, o objetivo deste trabalho foi avaliar a composição, frequência e comportamento de visitantes florais de algumas cultivares do meloeiro (Cucumis melo) (Amarelo, Pele de Sapo, Cantaloupe, Gália) em variadas situações (cultivo convencional e orgânico, época seca e chuvosa, com e sem mulching e introdução ou não de colmeias de abelhas melíferas) nos principais polos de produção do Nordeste brasileiro (Petrolina-PE/Juazeiro-BA, Pacajus-CE e Mossoró-RN). As observações e coletas dos visitantes ocorreram das 5h00 às 18h00, em dias não consecutivos. Foram registradas 12 espécies de insetos, a maioria abelhas. Entre elas, a mais frequente foi Apis mellifera (99.68%), mas outras espécies apareceram esporadicamente (menos de 0,5%): Xylocopa grisescens, Trigona spinipes, Plebeia sp., Melipona mandacaia, Frieseomelitta doedereleini, Halicitidae. Apis mellifera esteve presente em todas as cultivares e locais estudados. Xylocopa grisescens apareceu em dois polos, mas não em Pacajus-CE, no tipo Amarelo. E Trigona spinipes, embora estivesse presente nos três polos, não foi registrada no Pele de Sapo. O tipo Amarelo, com cultivo orgânico, sem o uso de mulching, e presença de colmeias de abelhas melíferas, no polo Petrolina-PE/ Juazeiro-BA, na época seca, foi a combinação de fatores que apresentou maior número de Apis mellifera como principal polinizadora das flores do meloeiro. Made available in DSpace on 2021-10-07T13:00:42Z (GMT). No. of bitstreams: 1 Silva.-Composition.2021.pdf: 509521 bytes, checksum: 88882c6f8d6e27095d8119274fdfe6bc (MD5) Previous issue date: 2021

Melipona subnitida (Hymenoptera: Apidae) is a stingless bee native to Caatinga biome in Brazil, well adapted to hot and dry climate of that region and has been traditionally explored for honey production. Here, we evaluate the genetic structure of 173 colonies of M. subnitida in northeast Brazil by partially sequenced mitochondrial genes cytochrome oxidase I (COI) to compare an introduced population isolated for 30 yr into the Island of Fernando de Noronha (IFN) with the continental populations. We identified high haplotype diversity (0.8220) with 14 haplotypes on the continental populations, being three new ones, compared with the database GenBank. The haplotype H4 was present at the center of network, occurring in four localities on mainland and fixed as a single haplotype on IFN. We propose that the island populations originally introduced carried one haplotype (H4), even though IFN population is suffering pressure by island effect through changes on morphology. Studies on island populations could be a model to understand the dynamics of isolated populations and sustainable management of this biome to preserve M. subnitida. Made available in DSpace on 2018-09-21T00:45:38Z (GMT). No. of bitstreams: 1 Marcia2018.pdf: 451546 bytes, checksum: 1a68fbcd5c566c0028d2a63d2c531fea (MD5) Previous issue date: 2018-09-20

Fil: Garibaldi, Lucas Alejandro. Universidad Nacional de Río Negro. Instituto de Investigaciones en Recursos Naturales, Agroecología y Desarrollo Rural; Argentina. Fil: Garibaldi, Lucas Alejandro. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones en Recursos Naturales, Agroecología y Desarrollo Rural; Argentina. Fil: Carvalheiro, Luísa G. Universidade de Brasília. Campus Universitário Darcy Ribeiro. Departamento de Ecologia; Brasil. Fil: Carvalheiro, Luísa G. Universidade de Lisboa. Faculdade de Ciências. Centre for Ecology, Evolution and Environmental Changes (CE3C); Portugal. Fil: Carvalheiro, Luísa G. Naturalis Biodiversity Center; Países Bajos. Fil: Vaissière, Bernard E. Institut national de la recherche agronomique; Francia. Fil: Gemmill Herren, Barbara. Food and Agriculture Organization of the United Nations; Italia. Fil: Hipólito, Juliana. Universidade Federal da Bahia. Campus de Ondina. Departamento de Zoologia. Instituto de Biologia; Brasil. Fil: Freitas, Breno M. Universidade Federal do Ceará. Campus Universitário do Pici. Departamento de Zootecnia. Centro de Ciências Agrárias; Brasil. Fil: Ngo, Hien T. Intergovernmental Platform on Biodiversity and Ecosystem Services (IPBES). UN Campus. IPBES Secretaria; Alemania. Fil: Azzu, Nadine. Food and Agriculture Organization of the United Nations; Italia. Fil: Sáez, Agustín. Universidad Nacional del Comahue. Instituto de Investigaciones en Biodiversidad y Medioambiente. Laboratorio Ecotono; Argentina. Fil: Sáez, Agustín. Consejo Nacional de Investigaciones Científicas y Técnica. Instituto de Investigaciones en Biodiversidad y Medioambiente. Laboratorio Ecotono; Argentina. Fil: Åström, Jens. Norwegian Institute for Nature Research; Noruega. Fil: An, Jiandong. Chinese Academy of Agricultural Sciences. Institute of Apicultural Research. Key Laboratory for Insect-Pollinator Biology of the Ministry of Agriculture; China. Fil: Blochtein, Betina. Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS); Brasil. Fil: Buchori, Damayanti. Bogor Agricultural University. Faculty of Agriculture. Department of Plant Protection; Indonesia. Fil: Chamorro García, Fermín J. Universidad Nacional de Colombia. Departamento de Biología. Laboratorio investigaciones en Abejas (LABUN); Colombia. Fil: Oliveira da Silva, Fabiana. Universidade Federal de Sergipe. Campus do Sertão. Departamento de Educação em Ciências Agrárias e da Terra; Brasil. Fil: Devkota, Kedar. Institute of Agriculture and Animal Science; Nepal. Fil: de Fátima Ribeiro, Márcia. Embrapa Semiárido; Brasil. Fil: Freitas, Leandro. Jardim Botânico do Rio de Janeiro (JBRJ); Brasil. Fil: Gaglianone, Maria C. Universidade Estadual do Norte Fluminense Darcy Ribeiro. Laboratório de Ciências Ambientais; Brasil. Fil: Goss, Maria. University of Zimbabwe. Faculty of Agriculture. Crop Science Department; Zimbabue. Fil: Irshad, Mohammad. National Agricultural Research Centre. Honey Bee Research Institute. Conservation and Management of Pollinators for Sustainable Agriculture through Ecosystem Approach project; Pakistán. Fil: Kasina, Muo. Kenya Agricultural and Livestock Research Organisation-Sericulture; Kenia. Fil: Pacheco Filho, Alípio J. Universidade Federal do Ceará. Campus Universitário do Pici. Departamento de Zootecnia. Centro de Ciências Agrárias; Brasil. Fil: Piedade Kiill, Lucia H. Embrapa Semiárido; Brasil. Fil: Kwapong, Peter. University of Cape Coast. School of Biological Sciences. College of Agriculture and Natural Sciences; Ghana. Fil: Nates Parra, Guiomar. Universidad Nacional de Colombia. Departamento de Biología. Laboratorio investigaciones en Abejas (LABUN); Colombia. Fil: Pires, Carmen. Parque Estação Biológica. Embrapa Recursos Genéticos e Biotecnologia; Brasil. Fil: Pires, Viviane. Instituto do Meio Ambiente e Recursos Hídricos (INEMA)–UR Extremo Sul; Brasil. Fil: Rawal, Ranbeer S. Pant Institute of Himalayan Environment and Development; India. Fil: Rizali, Akhmad. University of Brawijaya. Faculty of Agriculture. Department of Plant Pest Diseases; Indonesia. Fil: Saraiva, Antonio M. Universidade de São Paulo. Escola Politécnica; Brasil. Fil: Veldtman, Ruan. Kirstenbosch Research Centre. South African National Biodiversity Institute; Sudáfrica. Fil: Veldtman, Ruan. Stellenbosch University. Conservation Ecology and Entomology; Sudáfrica. Fil: Viana, Blandina F. Universidade Federal da Bahia. Campus de Ondina. Departamento de Zoologia. Instituto de Biologia; Brasil. Fil: Witter, Sidia. Fundação Estadual de Pesquisa Agropecuária (Fepagro Vale do Taquari). Centro de Pesquisa Emílio Schenk; Brasil. Fil: Zhang, Hong. Chinese Academy of Agricultural Sciences. Institute of Apicultural Research. Key Laboratory for Insect-Pollinator Biology of the Ministry of Agriculture; China. Ecological intensification, or the improvement of crop yield through enhancement of biodiversity, may be a sustainable pathway toward greater food supplies. Such sustainable increases may be especially important for the 2 billion people reliant on small farms, many of which are undernourished, yet we know little about the efficacy of this approach. Using a coordinated protocol across regions and crops, we quantify to what degree enhancing pollinator density and richness can improve yields on 344 fields from 33 pollinator-dependent crop systems in small and large farms from Africa, Asia, and Latin America. For fields less than 2 hectares, we found that yield gaps could be closed by a median of 24% through higher flower-visitor density. For larger fields, such benefits only occurred at high flower-visitor richness. Worldwide, our study demonstrates that ecological intensification can create synchronous biodiversity and yield outcomes.

Floral morphology and biology are important characteristics for plant-pollinator interactions and may influence the behavior of these agents. This study aimed to determine which floral attributes of different melon hybrids influence this interaction and, consequently, their attractiveness in simultaneous crops. The study was conducted in the region of Petrolina, State of Pernambuco (PE)/Juazeiro, State of Bahia (BA) and Mossoró, State of Rio Grande do Norte (RN), in areas with the following melon hybrids: Yellow type, Piel de Sapo, Cantaloupe and Galia. For studies on floral morphology and biology, hermaphrodites and male flowers of each hybrid were analyzed for their size and nectar chamber size, pollen and nectar production, anthesis time and flower lifespan. Floral visitors were observed simultaneously in hybrids of three types of melon, from 5:00 a.m. to 6:00 p.m., in the two study sites. Evaluations of the corolla diameter and flower height indicated that the hermaphrodite flowers were larger in size than male flowers in all types of melon investigated, in both study sites. As for nectar chamber, male flowers are larger in width, but smaller in height, compared to hermaphrodite flowers. Regarding the volume of nectar, differences were found between floral types for the hybrids evaluated, in the two study sites; the hermaphrodite flowers produced 2-7 times more nectar than male flowers in all studied hybrids. Observations of visits of Apis mellifera to areas with simultaneous flowering of the three types of melon demonstrated differences in the frequency of visits between hybrids, floral type and foraged resource. Flowers of the hybrids Piel de Sapo and Cantaloupe exhibited larger corolla diameter, larger dimensions of the nectar chamber and greater supply of resources for foraging, which could explain the higher number of visits of bees to their flowers in the sites studied.

A polinização é um componente chave da biodiversidade. Dela depende a produção de frutos e sementes em diversas espécies de plantas, e o néctar oferecido por elas, além do próprio pólen, é um recurso alimentar essencial a sobrevivência dos polinizadores.

In order to conduct a proper risk assessment of pesticides to bees, information is needed in three areas: (i) the toxicity of the pesticide; (ii) the probability of bee exposure to that pesticide; and (iii) the population dynamics of the bee species in question. Information was collected on such factors affecting pesticide risk to (primarily wild) bees in several crops in Brazil, Kenya and The Netherlands. These data were used to construct ?risk profiles? of pesticide use for bees in the studied cropping systems. Data gaps were identified and potential risks of pesticides to bees were compared between the crops. Initially, risk profiling aims to better identify gaps in our present knowledge. In the longer term, the established risk profiles may provide structured inputs into risk assessment models for wild and managed bees, and lead to recommendations for specific risk mitigation measures. Edição dos Proceedings of the 11 International Symposium Hazards of Pesticides to Bees, Wageningen, nov. 2011.

Stingless bees are an important asset to assure plant biodiversity in many natural ecosystems, and fulfill the growing agricultural demand for pollination. However, across developing countries stingless beekeeping remains an essentially informal activity, technical knowledge is scarce, and management practices lack standardization. Here we profited from the large diversity of stingless beekeepers found in Brazil to assess the impact of particular management practices on productivity and economic revenues from the commercialization of stingless bee products. Our study represents the first large-scale effort aiming at optimizing stingless beekeeping for honey/colony production based on quantitative data. Survey data from 251 beekeepers scattered across 20 Brazilian States revealed the influence of specific management practices and other confounding factors over productivity and income indicators. Specifically, our results highlight the importance of teaching beekeepers how to inspect and feed their colonies, how to multiply them and keep track of genetic lineages, how to harvest and preserve the honey, how to use vinegar traps to control infestation by parasitic flies, and how to add value by labeling honey containers. Furthermore, beekeeping experience and the network of known beekeepers were found to be key factors influencing productivity and income. Our work provides clear guidelines to optimize stingless beekeeping and help transform the activity into a powerful tool for sustainable development. Made available in DSpace on 2018-05-11T00:40:17Z (GMT). No. of bitstreams: 1 Marciacpatsa2015.pdf: 4074909 bytes, checksum: 1bbb4f950d194e3bd3b2013860573847 (MD5) Previous issue date: 2015-04-06

Para incrementar a renda familiar da população local e os serviços de polinização, duas espécies de abelhas-sem-ferrão, jandaíra (Melipona subnitida) e tiúba (Melipona fasciculata), foram introduzidas na ilha principal do arquipélago de Fernando de Noronha (PE). Os objetivos desse trabalho foram avaliar a condição da criação destas abelhas após 30 anos de sua introdução e verificar as possibilidades de desenvolvimento da meliponicultura local. A coleta de dados foi realizada em novembro de 2013 por meio de visitas técnicas e aplicação de questionários aos oito criadores encontrados. Os criadores mantinham pequeno número de colônias (de 1 a 5 para jandaíra, e de 1 a 8 para tiúba). Todos os criadores mantinham a atividade como hobby, não Comercializavam o mel e não conheciam as técnicas básicas de criação e manejo de abelhas-sem-ferrão, como por exemplo, divisão de ninhos, alimentação suplementar, etc. De modo geral a criação de abelhas-sem-ferrão em Fernando de Noronha, após 30 anos, não alcançou o esperado. Embora haja interesse dos criadores em ampliar a atividade, há muita deficiência de conhecimento. Cursos de capacitação e assistência técnica seriam boas ferramentas para a divulgação do conhecimento e desenvolvimento da meliponicultura local. Além disso, a comercialização de produtos meliponícolas, como o mel, teria alto valor agregadOS.

Honey bees (Apis mellifera) pollinate melon (Cucumis melo) and improve production and quality of fruits. However, little is known about bee behavior and number of hives required. The aims of this study were to compare bees visiting flowers in crop areas with different number of hives (0, 1, 2, and 3), and to evaluate which is the best number. Flowers were observed (n=78) from 5 am to 6 pm, for five consecutive days, in four experimental areas (0.5ha each). Comparisons were made for male (MF) and hermaphrodite (HF) flowers, number of hives and fruit production. The HF were always more visited than MF. Most comparisons made for three hives presented significant differences, since visits increased drastically, competition among bees for floral resources became stronger and reduced the production of commercial fruit (93.4%). On the other hand, the highest percentage of commercial fruit was obtained (99%) with two hives, setting the ideal number of hives as four hives ha-1.

Bees provide fundamental services to humanity, and the world has been concerned about the rapid loss of genetic diversity that these organisms have been suffering. The stingless bee Melipona subnitida is endemic to northeastern Brazil and has high potential for the production of honey and wax; it is also an important pollinator in the Caatinga biome. Populations of M. subnitida have increasingly declined due to predatory extractivism and destruction of its habitat. However, knowledge about its population structure could give insights on strategies for monitoring and conservation of this species. Here we collected workers from nine sites located at the southern limit of the species distribution and employed geometric morphometric techniques on their forewings in search of covariance between sampling site and wing morphology. It was observed a very significant correlation between both variables, indicating that the divergence among the sampled populations of M. subnitida was due to geographical distance among the sampling sites and, hence, suggesting the formation of different groups of populations along the studied geographical zone, each one with specific characteristics. Since M. subnitida habitat has been increasingly fragmented thus difficulting the genetic flow among populations, our findings will contribute to the formulation of management and conservation plans for this species in order to preserve its genetic diversity and, hence, to contribute to the generation of income for beekeepers in meliponiculture programs.

The distance a bee can fly to collect food is quite relevant, among other aspects, for successful pollination. However, studies on this aspect concerning stingless bees usually do not take into consideration their homing ability. The objectives of this study were to verify the maximum distance that foragers of Melipona mandacaia Smith can fly, and whether experience is relevant for their homing ability in a Caatinga region of Northeast Brazil. Five colonies were used to collect foragers. These were marked and released starting from 100 m from their nests and at every 100 m up to a maximum distance on which there would be no bee returning to the nest. To evaluate the influence of experience, after being marked, another group of bees was put back into colonies, collected again after eight days and released in five distances only (500, 1,000, 1,500, 2,000 and 2,500 m). In both experiments, as the distance increased, the returning success of the bees decreased significantly. In fact, there was a significant negative correlation between their returning success and the distances they were released. The maximum distance a translocate bee returned to its hive was 2,700 m. The percentage of success was very high for bees released at 500 and 1,000 m (100% and 77%, respectively), suggesting this is the common flight range for the species. In most cases, average percentage of success was significantly higher for experienced bees than for other bees reinforcing the idea that experience is quite relevant for homing ability.

Miniature stingless bee queens have been studied concerning frequency distribution, production and egg laying performance. This study aimed to investigate size variation in eggs laid by Plebeia remota (Holmberg) queens and whether it is due to differences in queen size or colony conditions. A sample of 10 queens (8 of typical size and 2 miniature) was measured morphometrically (head width, interorbital distance, and intertegular distance) as well the eggs they laid (length, width and volume). Initially, eggs were analyzed when laid by queens in their own colonies. Significant differences were found for length, width and volume of eggs considering the total group of queens or both queen morphotypes. However, no significant correlations were found between queen size and egg size. Afterwards, two experiments were performed to evaluate the influence of colony conditions on egg size. Firstly, we shifted the queens from their original colonies (i.e., a typical queen was placed into a miniature queen colony, and vice-versa). Secondly, they were put into another colony (both types of queens, one each time, were placed on a third colony, a ?host colony?). In all situations, both queen morphotypes laid eggs of similar or different sizes than before, often with significant differences. The results indicate that variation in egg size is due to conditions imposed to queens in the colony (e.g. queen feeding status, number of cells available to be oviposited), and not due to variation in queen body size.

Suplemento. Edição dos Resumos do II Seminário Brasileiro de Própolis e Pólen; V Congresso Baiano de Apicultura e Meliponicultura; VII Seminário de Própolis do Nordeste; II Feira da Cadeia Produtiva da Apicultura e Meliponicultura Ilhéus, maio, 2013.

O objetivo deste trabalho foi verificar a duração das viagens das operárias de mandaçaia (Melipona mandacaia) ao forragear. Suplemento. Edição dos Resumos do II Seminário Brasileiro de Própolis e Pólen; V Congresso Baiano de Apicultura e Meliponicultura; VII Seminário de Própolis do Nordeste; II Feira da Cadeia Produtiva da Apicultura e Meliponicultura Ilhéus, maio, 2013.

A alimentação artificial é utilizada na meliponicultura para fortalecer colônias, na divisão de ninhos e/ou em épocas de escassez de alimento. Entretanto, há divergências quanto às concentrações de açúcar a serem oferecidas às abelhas. Este trabalho teve como objetivo verificar o consumo de diferentes concentrações de açúcar na alimentação artificial fornecida para operárias de mandaçaia (Melipona mandacaia). O experimento foi realizado na Embrapa Semiárido, em Petrolina (PE), em setembro de 2012. Foram utilizadas 150 operárias de mandaçaia (M. mandacaia) distribuídas igualmente em seis caixas de madeira (repetições), contendo cinco tratamentos (10, 30, 50, 70 e 90% de concentração de açúcar). O alimento foi fornecido em pequenos containers plásticos contendo um pedaço papel filtro, para que as abelhas se apoiassem e não se afogassem. As unidades (containers + papel filtro) foram pesadas antes e após a adição do alimento e, após 24 h, para medir a quantidade de alimento consumido. Houve diferenças significativas (p < 0,01) entre as concentrações: quanto maior a concentração de açúcar menor o consumo pelas abelhas. De fato o maior consumo ocorreu com a menor concentração de açúcar, o que foi confirmado pela análise de regressão (R2= 0,85, p= 0,00). Também foram observadas diferenças significativas (p< 0,05) na maioria das comparações entre as concentrações testadas, indicando que realmente as abelhas preferem alimento menos concentrado. Edição Especial.

To increase the productivity of melon, new hybrids have been released. The aim of this study was to c ompare the differences in morphology and floral biology of two yellow melon hibrids and these could influence the attractiveness of the pollinators. The study was conducted in June 2010, at Embrapa Semiárido (Petrolina-PE), with hybrids BRS Araguaia and Tropical. To evaluate the morphology and anthesis ten flowers were selected of each floral type: hermaphrodite (H) and male (M). The floral visitors were observed simultaneously in the two hybrids, from 5h00a.m until 6h00p.m, in three non-consecutive days. In the morphology, it was found that the Tropical flowers have diameter of corolla higher in two floral types (M: x = 3.82±0.55cm, H: x = 4.74±0.52cm) compared to BRS Araguaia (M: x = 3.46±0.46cm, H: x = 3.77±0.45cm), although the differences were significant only for the hermaphrodites. The BRS Araguaia flowers presented significantly longer (p

Neste trabalho objetivou-se identificar fungos existentes em colônias de manduri (Melipona asilvai) mantidas na Embrapa Semiárido, em Petrolina (PE). Número Especial.

Edição dos Proceedings of the 11 International Symposium Hazards of Pesticides to Bees, Wageningen, nov. 2011.

Flight activity of foragers of four colonies of Plebeia remota (Holmberg, 1903) was registered from December 1998 to December 1999, using an automated system (photocells and PLC system). The colonies originated from two different regions: Cunha, state of São Paulo, and Prudentópolis, state of Paraná, Brazil. Flight activity was influenced by different climatic factors in each season. In the summer, the intensity of the correlations between flight activity and climatic factors was smaller than in the other seasons. During the autumn and winter, solar radiation was the factor that most influenced flight activity, while in the spring, this activity was influenced mainly by temperature. Except in the summer, the various climatic factors similarly influenced flight activity of all of the colonies. Flight activity was not affected by geographic origin of the colonies. Information concerning seasonal differences in flight activity of P. remota will be useful for prediction of geographic distribution scenarios under climatic changes.

Made available in DSpace on 2015-10-20T02:49:34Z (GMT). No. of bitstreams: 1 ID47686.pdf: 670747 bytes, checksum: 166e4bfe4db69867024f6218e590760b (MD5) Previous issue date: 2012-06-14 Edição dos Resumos do 5 Congresso Brasileiro de Meliponicultura e 19 Congresso Brasileiro de Apicultura, Gramado, maio 2012.

O objetivo deste trabalho foi montar uma coleção de plantas e uma palinoteca do pólo Petrolina (PE) Juazeiro (BA) para que, no futuro, possa-se identificar a origem floral do mel produzido na região. Made available in DSpace on 2019-05-01T00:46:58Z (GMT). No. of bitstreams: 1 ColecaodeReferenciadePlantas.pdf: 1040856 bytes, checksum: ab738e23cbce02b2fe42963950eddffe (MD5) Previous issue date: 2012 Edição dos Resumos do 5 Congresso Brasileiro de Meliponicultura e 19 Congresso Brasileiro de Apicultura, Gramado, maio 2012.

A Caatinga é o único bioma de distribuição exclusivamente brasileira, o que significa que grande parte do patrimônio biológico desse ecossistema não é encontrada em nenhum outro lugar do mundo. Porém, essa posição única entre os biomas brasileiros não foi suficiente para garantir a Caatinga o status que merece. A Caatinga é um dos biomas brasileiros mais alterados pelas atividades humanas, com mais de 45% de sua área alterada, sendo ultrapassado apenas pela Mata Atlântica e o Cerrado (Capobianco, 2002; Casteletti e cols., 2004). Em um estudo realizado recentemente, sobre a vegetação e uso do solo, verificou-se que a área de cobertura vegetal da Caatinga é de 518.635 Km2, equivalendo a 62,69% de remanescentes (MMA, 2008). Como conseqüência da degradação ambiental e da falta de preservação, muito já se perdeu em biodiversidade da Caatinga. A Biodiversitas (2001) cita, para esta formação vegetal, 19 espécies de plantas ameaçadas, dentre elas a aroeira do sertão (Myracrodruon urundeuva) e a baraúna (Schinopsis brasiliensis). Essas plantas desempenham importante papel na ecologia da Caatinga, pois são as principais árvores na composição das paisagens vegetais do sertão nordestino. Elas estão associadas à fauna local, onde suas folhas, flores e frutos servem de alimento para répteis, aves, mamíferos e insetos, principalmente abelhas. Suas flores, produzidas principalmente na estação seca, quando as fontes alimentares são escassas, abastecem os ninhos de abelhas nativas e exóticas. Além de fonte alimentar, estas árvores funcionam como abrigo para uma diversidade de animais e suporte para os ninhos de muitas aves e abelhas.

Estas características se refletem na sua presença em muitas espécies vegetais, tanto em áreas naturais quanto em sistemas agrícolas. Made available in DSpace on 2015-11-20T04:37:36Z (GMT). No. of bitstreams: 1 ID41979.pdf: 1081363 bytes, checksum: 10882f66193a4c8b1c9ededf83caf3da (MD5) Previous issue date: 2009-12-07 Número especial. Edição dos Resumos do 1 Congresso Nordestino de Apicultura e Meliponicultura e Feira da Cadeia Apícola, Salvador, nov. 2009.