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Aloetismo em Acromyrmex subterraneus brunneus Forel (Hymenoptera, Formicidae), durante o forrageamento, cultivo do jardim de fungo e devolução dos materiais forrageados Rev. Bras. entomol.
Forti,Luiz C.; Camargo,Roberto S.; Matos,Carlos Alberto O. de; Andrade,Ana Paula P. de; Lopes,Juliane F..
As formigas cortadeiras apresentam uma sofisticada divisão de trabalho durante o forrageamento, cultivo do jardim de fungo e devolução dos materiais forrageados. Materiais com diferentes graus de hidratação e dureza (esponja floral, isopor, plástico e argila) foram oferecidos a duas colônias de laboratório de Acromyrmex subterraneus brunneus Forel, 1911. As diferentes categorias de tamanho de operárias foram observadas durante a execução de 14 subtarefas. Probabilidade relativa de desempenho e as curvas aloéticas foram usadas para verificar a flexibilidade comportamental e os padrões comportamentais estereotipados das operárias. Os padrões comportamentais possibilitaram estabelecer papeis dentro de prováveis subcastas.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Acromyrmex subterraneus brunneus; Aloetismo; Formigas cortadeiras; Forrageamento.
Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262004000100011
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Chemical control of leaf-cutting ants: how do workers disperse toxic bait fragments onto fungus garden? Rev. Bras. entomol.
Catalani,Gabriela C.; Sousa,Kátia K.A.; Camargo,Roberto S. da; Caldato,Nadia; Matos,Carlos A.O.; Forti,Luiz C..
ABSTRACT Leaf-cutting ants are controlled with toxic baits. For the method’s greater efficiency, the baits must be distributed and processed by workers during fungus cultivation. To test hypotheses whether the mode of action of the active ingredients, which blocks the sodium channels and interrupts the production of ATP in the mitochondria, interferes with fragment distribution in nests; the dispersion of pellets fragments during fungus cultivation by workers was assessed, spatially referencing the fragment onto the fungus garden. Pellets fragments were randomly distributed, but the amount pellets fragments was influenced by the way that the active ingredient acts in the colony.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Atta sexdensbehavior; Indoxacarb; Mode of action; Sulfluramid.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262019000400290
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Energy substrate used by workers of leaf-cutting ants during nest excavation Rev. Bras. entomol.
Camargo,Roberto S.; Lopes,Juliane F. S.; Forti,Luiz C.; Somera,Alexandre F.; Bacci Jr,Mauricio.
Energy substrate used by workers of leaf-cutting ants during nest excavation. In this study we aimed to ascertain whether leaf-cutting ant workers lose body reserves (fat or sugars) as a function of nest excavation. For each treatment, we isolated 10 workers of Atta sexdens into two experimental groups, Control (C- without excavation) and Soil (S- with excavation), which were kept for different time intervals (0, 24, 48 or 72 hours), totaling 700 tested workers. We then determined the concentration of soluble carbohydrates and total lipid content in them. The total carbohydrates were determined colorimetrically, based on the reaction between carbohydrates and sulfuric acid-phenol. For determination of lipids, the insects were immersed in organic solvent...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Attini; Formicidae; Insecta; Lipids; Nest.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262013000400008
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The trade-off between the transmission of chemical cues and parasites: behavioral interactions between leaf-cutting ant workers of different age classes Rev. Bras. entomol.
Lopes,Juliane F.S.; Camargo,Roberto da Silva; Forti,Luiz C.; Hughes,William O.H..
ABSTRACT Social animals are faced with an intriguing dilemma. On the one hand, interactions between individuals are essential to exchange information and to promote cohesion, while on the other hand such interactions carry with them the risk of catching and transmitting parasites. This trade-off is particularly significant for social insects because low within-colony genetic diversity makes their colonies potentially vulnerable to parasites while frequent interactions are essential to the development of the colonial odor profile necessary for nestmate recognition. Here we investigate whether social interactions between young and old leaf-cutting ant workers show evidence of this trade-off. We find that old workers engage in more selfgrooming and mandibular...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Acromyrmex; Age polyethism; Behavioral interaction; Chemicals transfer.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262017000100069
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