Castes
Mostrando 1-12 de 48 artigos, teses e dissertações.
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1. Antimicrobial Diterpene from the Brazilian Termite Nasutitermes macrocephalus (Isoptera: Termitidae: Natutitermitinae)
Termites are insects with a complex social organization on castes among which soldiers are the only responsible for the colony defense. The soldiers of the Nasutitermes genus use chemical defense, which comprises a mixture of mono, sesqui and mainly diterpenes. The new diterpene 2b,3a-dihydroxy-trinervita-1(15),11-diene, found in Nasutitermes macrocephalus,
J. Braz. Chem. Soc.. Publicado em: 2018-03
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2. Ação afirmativa na Índia e no Brasil: um estudo sobre a retórica acadêmica
Políticas de ação afirmativa têm sido aplicadas para resolver problemas sociais e políticos derivados da persistência de padrões sociais de desigualdade e discriminação em diversos países. Embora sejam comumente associadas aos Estados Unidos, as ações afirmativas foram aplicadas pioneiramente pela Índia, durante a década de 1950, quando a Const
Sociologias. Publicado em: 2015-12
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3. Insights into the dynamics of hind leg development in honey bee (Apis mellifera L.) queen and worker larvae - A morphology/differential gene expression analysis
Phenotypic plasticity is a hallmark of the caste systems of social insects, expressed in their life history and morphological traits. These are best studied in bees. In their co-evolution with angiosperm plants, the females of corbiculate bees have acquired a specialized structure on their hind legs for collecting pollen. In the highly eusocial bees (Apini a
Genet. Mol. Biol.. Publicado em: 21/08/2015
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4. Caste polymorphism of apterous line of the Neotropical termite Nasutitermes corniger (Motschulsky) (Isoptera, Termitidae)
Termite societies are structured by individuals that can be grouped into castes and instars. The development of these instars in most species occurs in irregular patterns and sometimes is distinguished subcastes in physical systems that originate polymorphic soldiers and workers. In this study, we characterized the morphological diversity of castes of aptero
Rev. Bras. entomol.. Publicado em: 20/09/2013
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5. Transcript levels of ten caste-related genes in adult diploid males of Melipona quadrifasciata (Hymenoptera, Apidae): a comparison with haploid males, queens and workers
In Hymenoptera, homozygosity at the sex locus results in the production of diploid males. In social species, these pose a double burden by having low fitness and drawing resources normally spent for increasing the work force of a colony. Yet, diploid males are of academic interest as they can elucidate effects of ploidy (normal males are haploid, whereas the
Genetics and Molecular Biology. Publicado em: 28/10/2011
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6. Castes in the neotropical social wasp Leipomeles dorsata (Fabricius) (Hymenoptera: Vespidae): a window for workers achieving a new status in the colony
Morphometric studies performed in several species of Neotropical social wasps from the tribe Epiponini showed that in some species there are marked differences between castes, while other species present highly distinct castes with differences only in ovarian development. This work analyzed females from six colonies of the social wasp Leipomeles dorsata (Fab
Neotropical Entomology. Publicado em: 2010-08
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7. Morphological and glandular changes associated th the age polyethism of Polybia paulista (Hymenoptera: Vespidae) / Mudanças morfológicas e glandulares associadas ao polietismo etário em Polybia paulista (Hymenoptera: Vespidae)
The division of labor is a central theme in the study of social insects. In bees and wasps this ability is regulated for age castes of the workers. In Apis mellifera, several authors have shown selective activation of the glands for job in colony, and reduced body weight for foraging. In social wasps age polyethism among workers is a relatively unexplored su
Publicado em: 2010
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8. Estudo do cupim Coptotermes gestroi : análise de genes diferencialmente expressos entre castas e busca de genes de importância biotecnológica / Study of the termite Coptotermes gestroi : analysis of differentialy expressed genes between castes and search for genes with biotechnological applicability
Os cupins são insetos pertencentes à Ordem Isoptera, com mais de 3.000 espécies descritas. São importantes agentes de degradação de madeira e compostos celulósicos em geral. Entretanto, essas mesmas características tornam algumas das espécies danosas por destruírem estruturas de edificações, sendo responsáveis por prejuízos da ordem de milhões
Publicado em: 2010
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9. Caste differences in Pseudopolybia compressa (Hymenoptera: Vespidae: Polistinae)
Studies of morphological caste syndromes in the tribe Epiponini help us to understand the evolution of social behavior in insects. Few studies have integrated morphological syndromes of various species from the same or distinct genera. We studied morphological differences between castes from three colonies of Pseudopolybia compressa de Saussure, 1854, in ord
Zoologia (Curitiba). Publicado em: 2009-12
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10. DIVISÃO DE TRABALHO, POLIETISMO TEMPORAL E ASPECTOS DA ATIVIDADE FORRAGEADORA DE Mischocyttarus consimilis Zikán, 1949 (HYMENOPTERA: VESPIDAE)
The objective of this work was to study the castes division of labor in Mischocyttarus consimilis. For elaboration of the behavioral repertoire the observations were accomplished in 21 colonies in natural conditions with 20 hours of qualitative observations and 80 hours of quantitative observations. Thirty behavior acts were identified, of which 23 were exec
Publicado em: 2009
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11. Revisão taxonômica do gênero Spinitermes Wasmann, 1897 (Isoptera, Termitidae, Termitinae) / Taxonomic revision of the termite genus Spinitermes Wasmann, 1897 (Isoptera, Termitidae, Termitinae)
This is the taxonomic revision of the South American genus Spinitermes Wasmann, 1897 (Isoptera, Termitidae, Termitinae). I studied 399 samples including all those from MZUSP and others from institutions that I requested material as loans. The species of this genus feed on decomposed organic matter and occurs in both the soil and in the epigeal nests construc
Publicado em: 2009
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12. Reconhecimento parental em abelhas eussociais Neotropicais (Hymenoptera: Apinae, Meliponini): uma análise dos mediadores químicos e seus determinantes em Frieseomelitta varia / Kin recognition in neotropical eusoccial bees (hymenoptera, Apidae, Meliponini): analysis of chemical mediators and its determinants for Frieseomelitta varia
The ability to discriminate among genetic related individuals has a main importance in the Kin selection Hamiltons theory. Social insects use odor cues in recognition systems, and the main used cues are compounds present in their cuticle. These cues may originate from endogenous and exogenous sources. The exogenous cues may be absorbed from nest materials, f
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 22/02/2008