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| Registros recuperados: 38 | |
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| Cane, James H; USDA-ARS; jcane@biology.usu.edu. |
| Few studies directly address the consequences of habitat fragmentation for communities of pollinating insects, particularly for the key pollinator group, bees (Hymenoptera: Apiformes). Bees typically live in habitats where nesting substrates and bloom are patchily distributed and spatially dissociated. Bee studies have all defined habitat fragments as remnant patches of floral hosts or forests, overlooking the nesting needs of bees. Several authors conclude that habitat fragmentation is broadly deleterious, but their own data show that some native species proliferate in sampled fragments. Other studies report greater densities and comparable diversities of native bees at flowers in some fragment size classes relative to undisrupted habitats, but find... |
| Tipo: Peer-Reviewed Reports |
Palavras-chave: Apoidea; Bees; Conservation; Diversity; Habitat fragmentation; Land-use change; Pollination; Pollinator; Statistics; Taxonomy. |
| Ano: 2001 |
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| Roubik, David Ward; Smithsonian Tropical Research Institute; roubikd@tivoli.si.edu. |
| Plant-pollinator systems inherently possess wide variation that limits the applicability of surveys on population dynamics or diversity. Stable habitats are scarcely studied, whereas dynamics in unprotected habitats are less predictable or more compromised by exotic organisms (Apis, in the case of bee surveys). An extensively replicated, long-term study of orchid-bees (Euglossini) was made in protected tropical moist forest in Panama. Over 47,000 bees were recorded in 124 monthly censuses employing 1952 counts. No aggregate trend in abundance occurred (from 1979 to 2000), although four individual species declined, nine increased, 23 showed no change, and species richness was stable. No rare or parasitic species showed decreasing trends, while the most... |
| Tipo: Peer-Reviewed Reports |
Palavras-chave: ENSO; Euglossini; Abundance variability; Bees; Census techniques; Diversity; Pollinators; Trends; Tropical- temperate comparisons. |
| Ano: 2001 |
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| Cruz-Landim,Carminda da. |
| The morphology of the cyst cells in Apis mellifera Linné, 1758, Scaptotrigona postica Latreille, 1804, and Melipona bicolor bicolor Lepeletier, 1836 testis, as well as the average number of spermatic cells are reported. The data indicates a supporting and nourrishing role of the cyst cells to the developing cystocytes. The counts of immature spermatozoa in the cysts show an average of 202.8 ± 21.2 spermatozoa for A. mellifera, 117.4 ± 8.68 for S. postica and 88.8 ± 15.57 for M. bicolor, which predict the occurrence of 8 mitotic cycles in the cystocytes of A. mellifera and 7 in the meliponines, considering that only one spermatozoom originates of each final spermatogonium. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cyst cell; Cell number average; Testis; Bees. |
| Ano: 2001 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212001000200025 |
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| FAZOLIN, M.; LEDO, A. da S.. |
| A demanda por informações sobre o cultivo da gravioleira na região de Rio Branco, vem aumentando consideravelmente, principalmente no que se refere ao ataque de pragas. O ataque de insetos, afeta a qualidade dos frutos ou inviabilizam a sua comercialização, pela baixa qualidade que apresentam. Os frutos são danificados tanto interna como externamente, sendo que, cm ambos os casos, é comum a ocorrência de patógenos, que agravam ainda mais o problema. Este trabalho teve por objetivo fornecer informações sobre os insetos que se alimentam dos frutos de graviola em Rio Branco, dentro de uma proposta para a definição de wn manejo integrado dessas pragas na Região. |
| Tipo: Circular Técnica (INFOTECA-E) |
Palavras-chave: Guanabana; Ensacamento do fruto; Cerconota anonella; Broca da semente; Bephrateloides spp; Antiteuchus sepulcralis; Cigarrinha da graviola; Hemispherical scale; Rio Branco (AC); Acre; Western Amazon; Amazonia Ocidental; Trigona spp; Ceresa peruensis; Citrus snow scale; Bees; Abeja; Sapotes agrios.; Métodos de control; Dinámica poblacional; Control físico; Cochinilla; Plagas de plantas; Percevejo; Broca do fruto; Flutuação populacional; Controle mecânico; Inseto; Annona muricata; Irapuã.; Graviola; Praga de planta; Abelha; Saissetia coffeae; Cochonilha; Plant pests; Insecta; Unaspis citri; Apoidea.; Control methods; Soursops; Population dynamics; Physical control; Scale insects. |
| Ano: 1997 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/492604 |
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| ABREU,R.M.M.; MORAES,R.L.M. SILVA de; MALASPINA,O.. |
| This paper analyzes the summer and winter total protein content of 7, 14, 21, 28, 35, and 40-day old Apis mellifera L. worker venom glands before (control) and 24 and 96 hours after applying electrical shocks for venom extraction (experimental). During venom extraction, 7-day old workers responded more slowly and weakly to electrical shocks. This response intensifies with age, so that the workers approaching 20 days old respond faster and more aggressively to the shocks. Statistical analysis, using the non-parametric Wilcoxon and Kruskall-Wallis tests and complemented by the Jonckheere test, showed that the protein content varied from one age to another in the experimental group, which was well distinguishable from the values in the control Group in summer... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bees; Histology; Protein content; Summer; Winter; Electrical shock; Venom gland; Apis mellifera. |
| Ano: 2000 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0104-79302000000100006 |
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| Caldas,Saulo Andrade; Graça,Flávio Augusto Soares; de Barros,Júlia Soares Monteiro; Rolim,Márcia Farias; Peixoto,Tiago da Cunha; Peixoto,Paulo Vargas. |
| We report three cases of stings by Africanized bees in cattle in the state of Rio de Janeiro, Brazil. Erythema, subcutaneous edema, necrosis accompanied by skin detachment, and subsequent skin regeneration were observed, especially on the head and dewlap. Histopathological examinations performed 45 days later revealed complete skin reepithelialization with moderate dermal fibrosis. The clinical picture and differential diagnosis are discussed in the present manuscript, with a focus on photosensitization, which causes cutaneous lesions on the head (sequela) with cicatricial curving of the ears and can be very similar to what is observed in cattle attacked by swarms of bees. The distinction between photosensitization and bee sting lesions can be made with a... |
| Tipo: Info:eu-repo/semantics/report |
Palavras-chave: Cattle; Bees; Sting; Poisoning; Accidents. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992013000100502 |
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| Przybyłowicz, T.; Roessingh, P.; Groot, A.T.; Biesmeijer, J.C.; Oostermijer, J.G.B.; Chittka, L.; Gravendeel, B.. |
| Pollination based on insect deception has been debated in the scientific community since it was first reported over two hundred years ago. A vast majority of deceptive syndromes occur within the orchid family. While many cheating flowers have been described and are well known, there are still many curious cases that need further investigation. One prime example of such a case is Cypripedium calceolus, known as European lady’s slipper orchid. While the flower has been of interest to many prominent scientists for over a century, its pollination is still not fully understood. Both visual and olfactory cues seem to play an important role in pollinator attraction. In this study we focussed on the olfactory cues in order to explore their relationship (in future... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Bees; Behaviour; Chemical mimicry; Deception; EAG; Pollination; 42.75. |
| Ano: 2012 |
URL: http://www.repository.naturalis.nl/record/419174 |
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| Maimoni-Rodella,R.C.S.; Yanagizawa,Y.A.N.P.. |
| The floral biology of three weeds, Ipomoea cairica, I. grandifolia and I. nil (Convolvulaceae), was studied in Botucatu and Jaboticabal, São Paulo, in southeastern Brazil. The three species are melittophilous, with a varied set of floral visitors, but with some overlapping. Cluster analysis using Jacquard similarity index indicated a greater similarity among different plant species in the same locality than among the populations at different places, in relation to floral visitor sets. The promiscuous and opportunistic features of the flowers were shown, with such type of adaptation to pollination being advantageous to weeds since pollinator availability is unpredictable at ruderal environments. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Pollination; Bees; Morning-glory. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582007000100004 |
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| MAUÉS,MÁRCIA M.; COUTURIER,GUY. |
| O camu-camu (Myrciaria dubia (H.B.K.) McVaugh, Myrtaceae) é uma fruteira nativa que ocorre nas margens de rios e lagos inundáveis da Amazônia, e está sendo domesticada visando o cultivo em terra firme. O alto teor de ácido ascórbico nos frutos, cerca de 2.800 mg.100g-1 de polpa, fortalece a demanda para consumo no país e exportação. No período de 1997 a 1998, investigou-se a biologia floral e fenologia reprodutiva do camu-camu, em plantios da Embrapa Amazônia Oriental, em Belém, e em áreas de ocorrência natural, em Santarém e Oriximiná, no Estado do Pará, norte do Brasil. Observações diretas sobre o comportamento dos visitantes foram acompanhadas da coleta de espécimens para identificação e registro fotográfico. M. dubia apresenta inflorescências com... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amazon region; Bees; Native fruit tree; Melittophily; Pollination. |
| Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042002012000008 |
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| Maués,Márcia Motta; Oliveira,Paulo Eugênio A. M. de; Kanashiro,Milton. |
| Jacaranda copaia (Aubl.) D. Don is a pioneer tree widespread in the Brazilian Amazon, usually found colonizing forest gaps and altered areas, and the forest fragment edges. This study investigated aspects of the floral biology, breeding system and pollinators of J. copaia trees. Flowering lasts from August to November, during the low rainfall period extending up to four weeks per tree and 3-4 months for the population as a whole, characterizing a cornucopia flowering pattern. The fruit set ends in the beginning of the rainy season, with wind dispersed winged seeds. Fruit set from open pollination was 1.06% (n = 6,932). Hand pollination using self-pollen (n = 2,099) did not set fruits. Cross-pollination resulted in 6.54% fruit set (n = 2,524), representing... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bees; Floral biology; Late-acting self-incompatibility (LSI); Phenology; Pollinators. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042008000300015 |
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| Gonçalves,Rodrigo Barbosa. |
| ABSTRACT The Augochlora clade includes four genera: Augochlora Smith, Augochlorella Sandhouse, Ceratalictus Moure, and Pereirapis Moure. This is one of the richest and most widespread groups of Augochlorini bees. There are about 150 species, which occur from Argentina to Canada. The species of Augochlora clade are considered solitary to facultatively social, except Ceratalictus for which nothing is known. Wood nesting behavior arose once in the clade, in Augochlora sensu strictu. The objective of this study is to describe four new species and to present a revised phylogenetic analysis of the Augochlora clade for the placement of these species. The morphological matrix comprised 77 characters and 42 terminals, and resulted in two most parsimonious trees.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Augochlorini; Bees; Neotropical; Systematics; Taxonomy. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262019000100091 |
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| Lóriga Peña,Walberto; Fonte Carballo,Leydi; Demedio Lorenzo,Jorge. |
| El coleóptero Aethina tumida Murray se comporta como un parásito oportunista de las colmenas de abejas melíferas de África Subsahariana, pero dañino en áreas del Mundo con otros ecotipos de abejas. En Cuba se reportó en el año 2012, en colonias de Apis mellifera L., sin que haya provocado perjuicios apreciables. En África y Australia se ha observado en colmenas de abejas sin aguijón. Entre 2011 y 2014 se realizó inspección profunda a 270 colmenas silvestres y manejadas de la abeja sin aguijón Melipona beecheii Bennett, conocida en Cuba como «Abeja de la Tierra». De 12 colmenas silvestres, se detectaron adultos y larvas del parásito en una (8,33%), asociado al daño físico del habitáculo por una acción depredadora humana. De 258 colmenas manejadas, siete... |
| Tipo: Journal article |
Palavras-chave: Aethina tumida; Melipona beecheii; Parasitismo; Abejas; Bees. |
| Ano: 2014 |
URL: http://scielo.sld.cu/scielo.php?script=sci_arttext&pid=S0253-570X2014000300010 |
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| Registros recuperados: 38 | |
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