Artículos de revistas
Thoracic vibrations in stingless bees (Melipona seminigra): resonances of the thorax influence vibrations associated with flight but not those associated with sound production
Fecha
2008Registro en:
JOURNAL OF EXPERIMENTAL BIOLOGY, v.211, n.5, p.678-685, 2008
0022-0949
10.1242/jeb.013920
Autor
HRNCIR, Michael
GRAVEL, Anne-Isabelle
SCHORKOPF, Dirk Louis P.
SCHMIDT, Veronika M.
ZUCCHI, Ronaldo
BARTH, Friedrich G.
Institución
Resumen
Bees generate thoracic vibrations with their indirect flight muscles in various behavioural contexts. The main frequency component of non-flight vibrations, during which the wings are usually folded over the abdomen, is higher than that of thoracic vibrations that drive the wing movements for flight. So far, this has been concluded from an increase in natural frequency of the oscillating system in association with the wing adduction. In the present study, we measured the thoracic oscillations in stingless bees during stationary flight and during two types of non-flight behaviour, annoyance buzzing and forager communication, using laser vibrometry. As expected, the flight vibrations met all tested assumptions for resonant oscillations: slow build-up and decay of amplitude; increased frequency following reduction of the inertial load; and decreased frequency following an increase of the mass of the oscillating system. Resonances, however, do not play a significant role in the generation of non-flight vibrations. The strong decrease in main frequency at the end of the pulses indicates that these were driven at a frequency higher than the natural frequency of the system. Despite significant differences regarding the main frequency components and their oscillation amplitudes, the mechanism of generation is apparently similar in annoyance buzzing and forager vibrations. Both types of non-flight vibration induced oscillations of the wings and the legs in a similar way. Since these body parts transform thoracic oscillations into airborne sounds and substrate vibrations, annoyance buzzing can also be used to study mechanisms of signal generation and transmission potentially relevant in forager communication under controlled conditions.
Ítems relacionados
Mostrando ítems relacionados por Título, autor o materia.
-
Programa para o cálculo de fluxos de população correspondentes aos processos Vibration-Vibration e Vibration-Translation
Santos, Andrey Araújo dos; Konzen, Pedro Henrique de Almeida (2012-06-05)No presente trabalho estuda-se espécies moleculares vibracionalmente excitadas, em condições de dese - quilíbrio termodinâmico. A motivação geral do presente trabalho é dada pela diferença existente entre as medições dos ... -
Absorvedor dinâmico de vibração tipo lâmina vibrante
Kotinda, Giovanni Iamin -
VIBRATIONAL SPECTRA AND SURFACE-ENHANCED VIBRATIONAL SPECTRA OF AZAMACROCYCLES
Autor desconocido (SPRINGER, 2006)This chapter has been organized by considering several aspects. An introduction concerning the relevance of the electronic properties and applications of the azamacrocycles related to surface phenomena as well as the general ...