Suchergebnisse

Stingless bees form a group of eusocial bees belonging to the tribe Meliponini (Hymenoptera: Apidae) and are distributed in tropical and subtropical regions of the planet. Brazil, the main territory regarding stingless bees' diversity, has a large variety of phytogeographic regions that can influence the physical-chemical properties of the honey. Currently, the country does not have a legislation that represents its territorial reality as a whole, making the parameters unattainable for producers to market stingless bees' honey. In addition to its economic importance for producers, this product has sensory characteristics that are different from those produced by Apis mellifera, making it a product with high added value. Additionally, honey production is a sustainable practice and increases bee conservation, which, in general, are mainly threatened by human interference. Thus, the objective of this work was to analyze the scientific productions published in consolidated databases to understand how bees deal with different environmental and geographic conditions and how this reflects on honey characteristics, in addition, to generate data to prepare a proposal to standardize and market the honey. For this, the StART software was used, with the elaboration of a systematic review protocol. A total of 93 articles were listed in the initial search in the Web of Science, Scopus and Google Scholar databases and after the selection and execution process, 50 articles were selected. In the summarization phase, it was observed that there is still no consensus among researchers on how to stipulate a standard and reference ranges for the analyses. ; As abelhas sem ferrão formam um grupo de abelhas eussociais pertencentes à tribo Meliponini (Hymenoptera: Apidae) e são distribuídos nas regiões tropicais e subtropicais do planeta. O Brasil, principal território em termos de diversidade dessas abelhas, apresenta uma gama de regiões fitogeográficas que podem influenciar nas propriedades dos méis e atualmente não possui uma ...

The American stingless bees species have been used in management and breeding practices by local civilizations since the pre-Columbian era. Currently, many of these species are managed commercially and maintained in meliponaries. However, divergences exist among authors about the ecological utility of these practices. Some argue that meliponaries could serve to maintain local biodiversity while others argue that they have the opposite effect. Due to pressure from beekeepers and environmentalists there are efforts to draft specific rules that legislate production and market focusing on conservating native bees. In recent years, these norms have become more specific due to the use of empirical data from the scientific community and demands from social groups and producers. This paper presents a revision on Brazilian legislation as well its applicabilities and proposes alterations in the Environmental Crimes Law. ; As espécies de abelhas produtoras de mel e própolis nativas do continente americano têm sido usadas em práticas de manejo e reprodução por civilizações locais desde tempos pré-colombianos. Atualmente, muitas dessas espécies são manejadas comercialmente e mantidas em meliponários. No entanto, existem, na literatura, divergências sobre a utilidade ecológica dessas práticas. Alguns autores argumentam que os meliponários são fontes de manutenção da biodiversidade local, enquanto outros argumentam que eles têm o efeito oposto. Devido à pressão dos meliponicultores e ambientalistas, há esforços para elaborar regras específicas que legislem a produção e o mercado, focando na conservação das abelhas nativas. Nos últimos anos, essas normas tornaram-se mais específicas devido ao uso de dados empíricos da comunidade científica, e buscam atender a demanda dos grupos sociais e produtores. Este artigo propõe uma revisão da legislação brasileira, bem como sua aplicabilidade, e propõem alterações na Lei de Crimes Ambientais.

Climatic differences can directly affect the population structure of organisms. The Northeastern Brazilian covers an area of about 1.5 million square kilometres, in which the semi-arid part corresponds to approximately 60%. It is probably the most vulnerable region to climatic variations in Brazil. Here, we investigated the variability of Africanized honey bees in different localities from Northeast Brazil during the dry season and the influence of drought periods in morphological variation among populations. Analyses were carried out with data collected by traditional and geometric morphometrics of bees sampled during the dry season and showed a subtle morphological variation in agreement to the climatic pattern. Furthermore, once we added samples collected during the rainy season, we observed a change in its pattern, with a very different result from the same population sampled during drought periods. The geometric morphometrics results emphasized that samples collected during the rainy season in Mossoró would be more similar to bees from humid coastal areas. These results probably reflect the probable dispersion pattern of these bees between humid coastal and semi-arid areas.

Stingless bees (Apidae; Meliponini) occupy a great diversity of habitats in tropical and subtropical regions. They are eusocial and live in sessile colonies. Most meliponini species build nests in pre-existing cavities, such as tree hollows and stingless bee hive models imitate the conditions of natural nests. However, they are unwieldy for scientific studies, especially those focused on ecological and behavioral characteristics. We developed and tested a hive model that ensures clear visibility of the interior of the hive and facilitates ecological and behavioral studies and for environmental education. It successfully housed ten stingless bee species and one semi-social orchid bee species.

Our aim was to evaluate the occurrence of orchid bees in remnants of the Atlantic Forest. We sampled specimens from five regions of Southeast Brazil, covering three different physiognomies of the Atlantic Forest (mixed Araucaria forests with high altitude fields, Atlantic Semi-deciduous Forest and Atlantic Rain Forest). The distances between the sampling sites ranged from 24 to 746 km. Male orchid bees attracted by fragrances were actively sampled monthly during one year using entomological nets and aromatic traps. A total of 1,482 bees were captured, including four genera and at least 31 species. We observed differences in the abundance and richness of species sampled among sites. Climatic variables, mostly relative humidity, explained twice more of the observed differences in the Euglossini communities than simple spatial variation. Our study found differences in the composition of euglossine bee communities as well as in their patterns of abundance and dominance among different vegetation formations. However, the level of pairwise similarity among the Euglossini communities sampled, although highly variable, was not related to climatic factors or geographical distances between the sampling sites. The greatest dissimilarities in the composition of the orchid bee communities were observed between sites around 400 km from each other rather than among sites that were further apart. A possible explanation is that the sampled areas that were 400 km from each other were also highly dissimilar regarding climate, especially altitude.

Melipona scutellaris Latreille has great economic and ecological importance, especially because it is a pollinator of native plant species. Despite the importance of this species, there is little information about the conservation status of their populations. The objective of this study was to assess the diversity in populations of M. scutellaris coming from a Semideciduous Forest Fragment and an Atlantic Forest Fragment in the Northeast Brazil, through geometric morphometric analysis of wings in worker bees. In each area, worker bees were collected from 10 colonies, 10 workers per colony. To assess the diversity on the right wings of worker bees, 15 landmarks were plotted and the measures were used in analysis of variance and multivariate analysis, principal component analysis, discriminant analysis and clustering analysis. There were significant differences in the shape of the wing venation patterns between colonies of two sites (Wilk's λ = 0.000006; p < 0.000001), which is probably due to the geographical distance between places of origin which impedes the gene flow between them. It indicates that inter and intrapopulation morphometric variability exists (p <0.000001) in M. scutellaris coming from two different biomes, revealing the existence of diversity in these populations, which is necessary for the conservation of this bee species.

The study of M. subnitida, stingless bee well adapted to extreme environmental conditions, is noteworthy once the Northeastern Brazil faces climate changing predictions in which the precipitation rates are expected to decrease, and the average of temperatures to increase. The well-studied populations are limited to the Caatinga biome, where the species was considered endemic. However, the occurrence of this species has been reported in contrasting environments from arid region, such as mangrove and sandbanks in Maranhão state. Our primary goal was to characterize samples from these different environments and compare them with previously studied populations. We identified a unique mitochondrial haplotype per region. The haplotype found in Lençóis Maranhenses National Park was exclusive from this location and differed regarding the amino acid sequence when compared to the literature presented haplotypes from Caatinga, which might be related with different evolutionary processes in the distinct environments, though further studies are needed to confirm. Melipona subnitida is highly adapted to extreme environmental conditions and can survive under long drought periods, since during water and resource scarcity, the bees reduce the colony size to a minimum number of brood and workers. Thus, the species maintains only essential tasks for the nest, being an important mechanism to save the resources stored during the bloom of rainy periods (Maia-Silva et al., 2014; 2015). Assuming the climate change predictions for Northeastern Brazil (Marengo et al., 2011) in the semi-arid region, where average reductions in precipitation rates of up to 40–50% are expected (PBMC, 2013), the study bees resistant to these conditions, such as M. subnitida, is noteworthy. Considering the importance of this species regarding resistance to extreme climatic conditions, distributional modeling

Honey from the Apis mellifera bee (Hymenoptera, Apidae) is one of the most consumed beehive products in the world, mainly due to its nutritional and therapeutic value. In poorer regions, its commercialization can be an essential source of income for families and communities. However, the quality of honey can change both during harvesting and processing, as well as by climatic conditionsand the type of vegetation. Therefore, implementing good production practices, with quality control in collection and processing, can add value to this product, promoting the development of the region in which it is produced. Thus, the objectives of this work were to characterize the honey of Africanized honeybees produced in the Eastern Amazon region in the cities of Nova Olinda do Maranhão(NO), Santa Luzia do Paruá (SL) and verify its correlation with a commercial honey sample (CH) – from São Luiz-MA. The physicochemical properties (color, moisture, solids insoluble in water, minerals, and ash, hydroxymethylfurfural, acidity, anddiastatic activity) were analyzed according to the methods of CODEX Alimentarius and the Association of Official Analytical Chemists, and these data were evaluated by the Principal Component Analysis (PCA). The results showed that commercial honey presented higher levels of insoluble solids, HMF, minerals, and ash than samples from NO and SL. Variables that differentiated NO and SL honey were HMF, moisture, and diastase index. Although the samples have different characteristics, the data comply with Brazilian legislation, which can strengthen the development of apiculture in the region.