Mediadores comportamentais e comunicação química da vespa eussocial basal Mischocyttarus (Monocyttarus) cassununga Von Ihering, 1903 (Hymenoptera, Vespidae, Mischocyttarini)
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Data
2012-03-23
Autores
Murakami, André Sunao Nishiuchi [UNESP]
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Universidade Estadual Paulista (Unesp)
Resumo
Mischocyttarus cassununga é uma vespa eussocial basal ou de fundação independente, endêmica de região neotropical e que apresenta características particulares na organização social e outros aspectos bionômicos relacionados às castas comportamentais. O objetivo do trabalho foi investigar a importância dos hidrocarbonetos cuticulares na comunicação química de uma população dessa espécie. Através de observações comportamentais, verificação do estado morfofisiológico (dissecção) e análise química (Cromatografia Gasosa acoplada à Espectrometria de Massa ) foi possível estudar a relação entre o perfil químico do indivíduo e seu status social na colônia. Os resultados mostraram a presença de um grande número de compostos cuticulares (88 substâncias), de cadeia longa que variaram de 16 a 36 átomos de carbono. Dentre estes compostos que puderam ser detectados e identificados, os predominantes foram os alcanos ramificados (metilalcanos e dimetilalcanos), seguidos pelos alcanos lineares e etilalcanos, o que sugere uma alta complexidade dos hidrocarbonetos na espécie em estudo. Os hidrocarbonetos encontrados nos perfis cuticulares das fêmeas estudadas aparentemente apresentam uma função colônia-específica, assim comoprovavelmente devem estar sinalizando o estado reprodutivo do indivíduos na colônia. As análises realizadas de diversas maneiras também mostraram que os parâmetros tais como inseminação e desenvolvimento ovariano provavelmente justificam melhor as diferenças nas proporções de determinadas substâncias no perfil cuticular dentro da organização social de Mischocyttarus cassununga. Analisar as possíveis diferenças dos perfis cuticulares considerando a influência conjunta de todos parâmetros fisiológicos também possibilita o entendimento da função...
Mischocyttarus cassununga is a eusocial basal wasp with independent foundation from Neotropical areas, and which displays peculiar characteristics about the social organization and other bionomic aspects related to behavioral castes. In this study, we investigated the importance of cuticular hydrocarbons in the chemical communication for one population of this species. through behavioural observation, morphophysiological verification and chemical analysis (Gas Chromatography - Mass Spectrometry = GC MS) it was possible to study the relation between the cuticular profile of the individuals and their social status in colony. The results showed the presence of a large number of long-chain cuticular compouds (88 substances) ranging from 16 to 36 carbon atoms. Among the compounds which were found, the predominant were branched alkanes (methylalkanes and dimethylalkanes), followed by linear alkanes and ethylalkanes, suggesting a complex mixtures of hydrocarbon. The cuticular hydrocarbon profile of females showed a colony-specific function, and should probably signal the reproductive status of individuals in the colony. The analysis that was carried out in various ways, also showed that parameters such as insemination and ovarian development are probably explaining better the differences in the proportions of certain substances in the cuticular profile within the social organization of Mischocyttarus cassununga. To analyze the possible differences of cuticular profiles, considering the combined influence of all physiological parameters, also allows understanding the function of hydrocarbon chemistry, as well as closer study of the situation in reality, since control such physiological variables is difficult or almost impossible. Furthermore, little is known about how social insects perceive the differences of... (Complete abstract click electronic access below)
Mischocyttarus cassununga is a eusocial basal wasp with independent foundation from Neotropical areas, and which displays peculiar characteristics about the social organization and other bionomic aspects related to behavioral castes. In this study, we investigated the importance of cuticular hydrocarbons in the chemical communication for one population of this species. through behavioural observation, morphophysiological verification and chemical analysis (Gas Chromatography - Mass Spectrometry = GC MS) it was possible to study the relation between the cuticular profile of the individuals and their social status in colony. The results showed the presence of a large number of long-chain cuticular compouds (88 substances) ranging from 16 to 36 carbon atoms. Among the compounds which were found, the predominant were branched alkanes (methylalkanes and dimethylalkanes), followed by linear alkanes and ethylalkanes, suggesting a complex mixtures of hydrocarbon. The cuticular hydrocarbon profile of females showed a colony-specific function, and should probably signal the reproductive status of individuals in the colony. The analysis that was carried out in various ways, also showed that parameters such as insemination and ovarian development are probably explaining better the differences in the proportions of certain substances in the cuticular profile within the social organization of Mischocyttarus cassununga. To analyze the possible differences of cuticular profiles, considering the combined influence of all physiological parameters, also allows understanding the function of hydrocarbon chemistry, as well as closer study of the situation in reality, since control such physiological variables is difficult or almost impossible. Furthermore, little is known about how social insects perceive the differences of... (Complete abstract click electronic access below)
Descrição
Palavras-chave
Vespa, Mischocyttarus, Vespa - Comportamento, Vespa - Morfologia, Vespa - Fisiologia, Himenoptero, Ontogenia
Como citar
MURAKAMI, André Sunao Nishiuchi. Mediadores comportamentais e comunicação química da vespa eussocial basal Mischocyttarus (Monocyttarus) cassununga Von Ihering, 1903 (Hymenoptera, Vespidae, Mischocyttarini). 2012. 215 f. Tese - (doutorado) - Universidade Estadual Paulista, Instituto de Biociências de Rio Claro, 2012.