Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99


Search Results: 1 - 10 of 395 matches for " bees "
All listed articles are free for downloading (OA Articles)
Page 1 /395
Display every page Item
Acta Biológica Colombiana , 2006,
Abstract: the solitary bee genera lophothygater moure y michener (apidae, eucerini) and tapinotaspoides moure (apidae, tapinotaspidini) are reported from northern colombia for the first time. these genera were previously known from the central brazilian amazonian and argentina and paraguay, respectively.
A New Evolutionary Method for Solving Combined Economic and Emission Dispatch  [PDF]
A. N. Afandi, Hajime Miyauchi
Energy and Power Engineering (EPE) , 2013, DOI: 10.4236/epe.2013.54B149

This paper presents a new evolutionary method called in Harvest Season Artificial Bee Colony (HSABC) algorithm for solving constrained problems of Combined Economic and Emission Dispatch (CEED). The IEEE-30 bus system is adopted as a sample system for determining the best solutions of the CEED problems considering operational constraints. Running outs of designed programs for the HSABC show that applications of various compromised factors have different implications on the CEED’s results, that minimum cost computations are started at different values, and that increasing load demands have affected costs, pollutant emissions and generated powers.

Ornamental Bee Plants as Foraging Resources for Urban Bees in Southern Brazil  [PDF]
Denise Monique Dubet da Silva Mouga, Vanessa Feretti, Jeniffer Cristine de Sena, Manuel Warkentin, Andressa Karine Golinski dos Santos, Carolina Lopes Ribeiro
Agricultural Sciences (AS) , 2015, DOI: 10.4236/as.2015.63037
Abstract: Ornamental plants are distinguished by the shape and color of their leaves/flowers and their use in landscaping and gardening. In urban areas, their presence is relevant for the maintenance of bees. Aiming to list the ornamental bee plants species occurring in Santa Catarina State (SC), southern Brazil, a survey of forage resources for bees, recorded in the State, was performed. We refer all published works developed in SC (resulting in the period 1983-2014) which include data from reports of scientific research, monographs, dissertations, Masters Dissertations, Doctoral Thesis, annals of scientific events, scientific articles and books. From the 28 ensuant works, we listed, as ornamental bee plants occurring in SC, 201 species, of 156 genera and 66 botanical families. Of these species, 92 are native (N), 26 endemic to Brazil and 109 exotic (E). Families with more ornamental bee species are: Fabaceae (22 species), Asteraceae (20), Solanaceae (11), Rosaceae (10) and Lamiaceae (8). The most cited species are: Lantana camara L. (N) (Verbenaceae) (9 quotes), Aloysia virgata (N) (Ruiz & Pav.) Juss. (Verbenaceae) (8), Hedychium coronarium J. Koenig (naturalized) (Zingiberaceae) (6) and Brachyscome multifida (E) (Asteraceae) (5), regarding habitus, herbs (48.5%) predominate, followed by bushes (21.5%), trees (16.5%) and vines (10.5%). Preferred colours of flowers by bees are, in decreasing order: white, yellow, red/pink, and others. The genus Ipomoea, Calliandra, Passiflora, Prunus and Senecio have more ornamental bee plant species. A large botanical diversity arises, demonstrating the possibilities for urban bee foraging and ornamental featuring, in a perspective of sustainability.
Determining the Levels of Trace Elements Cd, Cu, Pb and Zn in Honey of Stingless Bee (Hymenoptera: Apidae) Using Voltammetry  [PDF]
Andreia Santos do Nascimento, Luis Carlos Marchini, Carlos Alfredo Lopes de Carvalho, Diogo Feliciano Dias Araújo, Talita Antonia da Silveira, Ricardo Alves de Olinda
Food and Nutrition Sciences (FNS) , 2015, DOI: 10.4236/fns.2015.67062
Abstract: Determining the levels of heavy metals in honey is a measure to control its quality. The objective of this study was to determine the contents of Cd, Cu, Pb and Zn in honey of stingless bee. The differential pulse anodic stripping voltammetry (DPASV) was used to determine the trace elements in honey samples. Pb was detected in 100% of the samples, Cu and Zn in 98.15%, and Cd only in 33.33%. The trace elements analyzed detected in the samples remained within tolerable levels in foods for human consumption.
Infestation and distribution of the mite varroa jacobsoni in africanized honey bee (apis mellifera) colonies
Moretto,Geraldo; de Mello Jr,Leonidas J.;
Interciencia , 2001,
Abstract: whereas in several parts of the world varroa is the major pest affecting apiculture, in others the parasite is unknown to many beekeepers because of the little damage it causes to bees. the impact of the mite varroa jacobsoni is related to the climatic conditions and the races of apis mellifera bees in each region where the pest exists. in the present study, the mite infestation levels were assessed to determine the evolution of the pest in africanized bee colonies in southern brazil. the current level of infestation was considered low, approximately two mites per one hundred adult bees. this result is similar to that obtained for the same apiary almost five years ago and for others distributed in various regions of brazil. in the present study, on average, 61% of the total varroa population was found in the worker brood.
Notas taxon?micas sobre Exaerete (Hymenoptera: Apidae: Euglossina), com a descri??o de uma nova espécie
Oliveira, Marcio Luiz de;
Biota Neotropica , 2011, DOI: 10.1590/S1676-06032011000100012
Abstract: exaerete kimseyae sp. n., a cleptoparasitic bee apparently endemic to panama is described. this new species was misidentified by kimsey (1979) as e. trochanterica (friese, 1910). for this reason anjos-silva & rebêlo (2006), not knowing the true identity of exaerete trochanterica, described an individual of this species collected in mato grosso, brazil as a new taxon, exaerete guaycuru. here e. guaycuru is placed as junior synonym of exaerete trochanterica.
Biologia e Arquitetura de Ninhos de Centris (Hemisiella) tarsata Smith (Hymenoptera: Apidae: Centridini)
Neotropical Entomology , 2001, DOI: 10.1590/S1519-566X2001000400005
Abstract: centris (hemisiella) tarsata smith is an indigenous solitary bee multivoltine widespread on neotropical region. the aim of this study was to analyse aspects of its biology and structure of nests were investigated using traps nests made by wood, which were randomly distributed in a coastal sand dune environment, in bahia, brazil ( 12° 56' s e 38° 21' w). nests were found in trap nests of 0.8 and 1.0 cm in diameter, but the latter was mostly used by females (68.7%). the bees constructed their nests with sand mixed with a substance, probably wax or oil. completed nests had six to eight cells separated by a space filled with those mixture. from the 16 nests obtained, 55 males and 49 females emerged (sex ratio = 1: 0.89). the innermost cells of the nests produced females and the outermost cells males. females were significantly (t = 1.679; p < 0.05) larger (x = 4.52 ± 0.11 mm) than males ( x = 3.94 ± 0.13 mm), and no dimorphism in males was found. in general the structural aspects of the nests presented in this work agree with the data found to the same species from others ecosystems.
Fauna de euglossina (Hymenoptera: Apidae) da Amaz?nia sul-ocidental, Acre, Brasil
Storck-Tonon, Danielle;Morato, Elder Ferreira;Oliveira, Marcio Luiz;
Acta Amazonica , 2009, DOI: 10.1590/S0044-59672009000300026
Abstract: male orchid bees were collected between december 2005 and september 2006 in 11 forest areas of different sizes in the region of rio branco, acre, southwestern amazonia, brazil. the bees were attracted by 6 aromatic compounds and collected by insect nets and scent baited traps. a total of 3,675 males of euglossina in 4 genera and 36 species were collected. eulaema cingulata (fabricius) was the most common (24.6%), followed by eulaema meriana (olivier) (14.6%), euglossa amazonica dressler (10.5%), eulaema nigrita lepeletier (10.5%) and eulaema pseudocingulata (oliveira) (7.2%). cineole was the scent that attracted the greatest number of individuals (23.8%) and methyl salicylate the greatest number of species (28) for both methods of sampling. thirty one bees of 9 species with pollinar orchid attached to their bodies were collected. the accumulative number of species stabilized after the 48th collection. few species were abundant; the great majority were represented by less than 50 bees. the lack of standardized sample protocols limited very much the conclusions derived from comparisons among the majority of studies on euglossina assemblages. however, the results presented here suggest that the state of acre is very rich in those bees compared to other regions.
Biologia reprodutiva de Cattleya eldorado, uma espécie de Orchidaceae das campinas amaz?nicas
Storti, Eliana Fernandez;Braga, Pedro Ivo Soares;Storti Filho, Atilio;
Acta Amazonica , 2011, DOI: 10.1590/S0044-59672011000300005
Abstract: the orchid plants are highly prized for their lush exotic flowers. it is the largest plant family with more than 24000 species, which indicates a high diversity of forms and adaptations to different environments, including the capacity to attract, deceive and manipulate visitors involved in cross-pollination. cattleya eldorado occurs in areas of white sand campinas, a typical vegetation type of the amazon region, which is under strong anthropogenic pressure. this work's main objectives to know the biological processes of c. eldorado providing subsidies to maintain and manage it in its natural habitat. this study was conducted from 2000 to 2006 in the campina biological reserve, during its flowering period. c. eldorado is an epiphytic orchid species that has the melittophyly syndrome and is adapted to its pollinator, the bee eulaema mocsaryi recognizing their flowers by smell and by visual stimuli, through their color and reflection of ultraviolet light. c. eldorado is self-compatible, even if it requires a pollinating agent for the transfer of the pollinarium until its deposition in the stigmatic cavity of the flower.
Bees visitors of three species of Clusia (Clusiaceae) flowers in Central Amazonia
Kaminski, Ana Claudia;Absy, Maria Lúcia;
Acta Amazonica , 2006, DOI: 10.1590/S0044-59672006000200016
Abstract: observations on bees visitors to three species of clusia (clusiaceae) flowers in the reserva adolpho ducke, manaus, amazonas, brazil were made during three two-week periods. the three species of clusia, namely c. grandiflora, c. panapanari and c. insignis, presented variations regarding the species of bee visitors. a total of 23 bee species visited the three species of clusia. the euglossini and meliponinae bees were the most frequent visitors of the clusia flowers. bee collecting behavior of floral resources is described.
Page 1 /395
Display every page Item

Copyright © 2008-2017 Open Access Library. All rights reserved.