Caste Differentiation
Mostrando 1-12 de 15 artigos, teses e dissertações.
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1. Variation of cuticular chemical compounds in three species of Mischocyttarus (Hymenoptera: Vespidae) eusocial wasps
Abstract The social wasps have a remarkable system of organization in which chemical communication mediate different behavioral interactions. Among the compounds involved in this process, cuticular hydrocarbons are considered the main signals for nestmate recognition, caste differentiation, and fertility communication. The aims of this study were to describe
Rev. Bras. entomol.. Publicado em: 2017-09
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2. An adaptive view of caste differentiation in the neotropical wasp Polybia (Trichothorax) sericea Olivier (Hymenoptera: Vespidae)
The tribe Epiponini comprehends the swarm-founding Neotropical wasps, with several species endemic to Brazil, which are extremely important in studies of social evolution of wasps. The Epiponini diverge in several ways from the definitions of high eusociality, since caste syndromes range from species without morphological caste differentiation to those with
Neotropical Entomology. Publicado em: 2011-12
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3. Substitution of Queens in Colony Plebeia catamarcensis (Hymenoptera : Apidae: Meliponina), and the Frequency of Caste in the Emergent Mass of cells / SUBSTITUIÇÃO DE RAINHAS EM COLÔNIAS DE PLEBEIA CATAMARCENSIS (HYMENOPTERA: APIDAE: MELIPONINA), E A FREQÜÊNCIA DE CASTAS NOS FAVOS EMERGENTES
The process of substitution of queen for Plebeia catamarcensis involves one strong attractiveness of the queen just emerged, and specify reactions of the workers, who if alternate between attacks and court the queen, the workers had still presented behaviors related to the construction and oviposition of cells in the absence of the queen. Despite this specie
Publicado em: 2008
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4. SUBSTITUIÇÃO DE RAINHAS EM COLÔNIAS DE PLEBEIA CATAMARCENSIS (HYMENOPTERA: APIDAE: MELIPONINA), E A FREQÜÊNCIA DE CASTAS NOS FAVOS EMERGENTES / Substitution of Queens in Colony Plebeia catamarcensis (Hymenoptera : Apidae: Meliponina), and the Frequency of Caste in the Emergent Mass of cells
The process of substitution of queen for Plebeia catamarcensis involves one strong attractiveness of the queen just emerged, and specify reactions of the workers, who if alternate between attacks and court the queen, the workers had still presented behaviors related to the construction and oviposition of cells in the absence of the queen. Despite this specie
Publicado em: 2008
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5. The way of insulínica signalling (IIS) in the differentiation of chaste in mellifera Apis. / A via de sinalização insulínica (IIS) na diferenciação de castas em Apis mellifera
O polifenismo facultativo, observado entre rainhas e operárias em insetos altamente eussociais tem como estímulo inicial uma alimentação diferencial na fase larval que afeta tanto o desenvolvimento geral das larvas quanto a diferenciação de órgãos e sistemas, principalmente o sistema reprodutor das fêmeas. A via de sinalização por insulina (IIS) �
Publicado em: 2007
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6. Identification of differentially expressed genes in queen and worker castes of Melipona quadrifasciata / Identificação de genes diferencialmente expressos nas castas da rainha e operaria de Melipona quadrifasciata
Caste polyphenism is a multifaceted phenomenon, most evident in the marked differences in reproductive capacity and longevity between queens and workers. In the present study, the stingless bee Melipona quadrifasciata anthidioides was chosen to investigate differences in gene expression between newly emerged adult queens and workers. This study has focused o
Publicado em: 2005
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7. Determinação das castas em Scaptotrigona postica (Latreille) (Hymenoptera, Apidae, Meliponini): diferenciação do ovário
Both castes of Scaptotrigolia postica (Latreille, 1804) possess four ovarioles in each ovary. Queen and workers have the same ovarian development during the larvallife, but in lhe late larval stage the queen ovary beco me larger. During pupation a higher rate of cell division is observed in queen ovarioles and a higher rale of cell death in workers. Newly em
Revista Brasileira de Zoologia. Publicado em: 2002-09
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8. Insect juvenile hormone: from "status quo" to high society
Juvenile hormone (JH) exerts pleiotropic functions during insect life cycles. The regulation of JH biosynthesis by neuropeptides and biogenic amines, as well as the transport of JH by specific binding proteins is now well understood. In contrast, comprehending its mode of action on target organs is still hampered by the difficulties in isolating specific rec
Brazilian Journal of Medical and Biological Research. Publicado em: 2000-02
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9. Caste- and development-associated gene expression in a lower termite
Social insects such as termites express dramatic polyphenism (the occurrence of multiple forms in a species on the basis of differential gene expression) both in association with caste differentiation and between castes after differentiation. We have used cDNA macroarrays to compare gene expression between polyphenic castes and intermediary developmental sta
BioMed Central.
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10. Genetic basis for queen–worker dimorphism in a social insect
Eusocial insects are characterized by reproductive division of labor, cooperative brood care, and the presence of a sterile worker caste. It is generally accepted that caste determination, including the differentiation of females into sterile workers and reproductive queens, is determined by environmental factors. In contrast, we find that in the red harvest
The National Academy of Sciences.
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11. Genetic determination of the queen caste in an ant hybrid zone
The question of how reproductives and sterile workers differentiate within eusocial groups has long been a core issue in sociobiology because it requires the loss of individual direct fitness in favor of indirect or group-level fitness gains. The evolution of social behavior requires that differentiation between workers and female reproductives be environmen
The National Academy of Sciences.
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12. Soldier caste-specific gene expression in the mandibular glands of Hodotermopsis japonica (Isoptera: Termopsidae)
Although “polymorphic castes” in social insects are well known as one of the most important phenomena of polyphenism, few studies of caste-specific gene expressions have been performed in social insects. To identify genes specifically expressed in the soldier caste of the Japanese damp-wood termite Hodotermopsis japonica, we employed the differential-dis
The National Academy of Sciences.