Results 171 to 180 of about 2,642 (206)
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Journal of Insect Physiology, 1979
Abstract Workers of Atta cephalotes mark the area around their nest with a pheromone that has at least two components, one of which is colony-specific. Another, which was isolated and tested for its activity, is genus- or species-specific in its action; it appears to be similar in A. sexdens and A.
K. Jaffé +2 more
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Abstract Workers of Atta cephalotes mark the area around their nest with a pheromone that has at least two components, one of which is colony-specific. Another, which was isolated and tested for its activity, is genus- or species-specific in its action; it appears to be similar in A. sexdens and A.
K. Jaffé +2 more
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1905
Published as part of Forel, A., 1905, Miscellanea myrmicologiques, II (1905)., pp.
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Published as part of Forel, A., 1905, Miscellanea myrmicologiques, II (1905)., pp.
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Nuclear mitochondrial‐like sequences in ants: evidence from Atta cephalotes (Formicidae: Attini)
Insect Molecular Biology, 2007Abstract Nuclear mitochondrial‐like sequences (numts) are copies of mitochondrial DNA that have migrated to the genomic DNA. We present the first characterization of numts in ants, these numts being homologues to a mitochondrial DNA fragment containing loci the 3′ portion of the cytochrome oxidase I gene, an ...
Martins, J. +5 more
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1939
Published as part of Borgmeier, T., 1939, Nova contribuição para o conhecimento das formigas neotropicais (Hym. Formicidae)., pp.
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Published as part of Borgmeier, T., 1939, Nova contribuição para o conhecimento das formigas neotropicais (Hym. Formicidae)., pp.
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A novel autostimulatory pheromone regulating transport of leaves in Atta cephalotes
Animal Behaviour, 1986Abstract Workers of the leaf-cutting ant Atta cephalotes mark freshly cut and stored leaves with an abdominal secretion, prior to transport. Such leaves are more readily picked up than unmarked leaves. This effect, and subsequent marking, can be experimentally induced by an extract of Dufour's gland, which contains a number of straight-chain ...
J.W.S. Bradshaw, P.E. Howse, R. Baker
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Journal of Comparative Physiology A, 2022
Brain evolution is hypothesized to be driven by behavioral selection on neuroarchitecture. We developed a novel metric of relative neuroanatomical investments involved in performing tasks varying in sensorimotor and processing demands across polymorphic task-specialized workers of the leafcutter ant Atta cephalotes and quantified brain size and ...
I. B. Muratore +2 more
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Brain evolution is hypothesized to be driven by behavioral selection on neuroarchitecture. We developed a novel metric of relative neuroanatomical investments involved in performing tasks varying in sensorimotor and processing demands across polymorphic task-specialized workers of the leafcutter ant Atta cephalotes and quantified brain size and ...
I. B. Muratore +2 more
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Das Parasitenabwehren der Minima‐Arbeiterinnen der Blattschneider‐Ameise (Atta cephalotes)
Zeitschrift für Tierpsychologie, 1967ZusammenfassungDie Minima‐♀ der Blattschneiderameise Atta cepbalotes schützen im Außendienst die Blätter schneidenden und heimtragenden Media‐♀♀ vor Angriffen parasitischer Dipteren aus der Gruppe der Phoridae. Sie umstehen die Arbeitenden, die sich selbst nur schwer wehren können, drohen mit offenen Mandibeln nach oben und schnappen nach den sich ...
null Irenäus +1 more
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Allometry and the geometry of leaf-cutting in Atta cephalotes
Behavioral Ecology and Sociobiology, 1991This study considers the relationship of both leg length and the geometry of leaf-cutting to load-size determination by the highly polymorphic leaf-cutting ant Atta cephalotes. A. cephalotes workers anchor on the leaf edge by their hind legs and pivot around them while cutting arcs from leaves.
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The mass recruitment system of the leaf cutting ant, Atta cephalotes (L.)
Animal Behaviour, 1979Abstract The recruitment system of Atta cephalotes workers was studied in the laboratory. The number of ants recruited to a food source depends on the quality of the food and on the duration of starvation of the colony, and is related to the concentration of trail pheromone on the trail but not to the number of ants initially returning to the nest ...
K. Jaffe, P.E. Howse
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Shear adhesive performance of leaf‐cutting ant workers (Atta cephalotes)
Biotropica, 2019AbstractWingless arboreal ants must resist the force of gravity while traversing substrates in their environment. For leaf‐cutting ants like Atta cephalotes, foraging may also include a ca. 30 m vertical descent while carrying a load 1–6 times their body mass.
Alyssa Y. Stark +2 more
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