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Calling behavior of Tetropium fuscum (Coleoptera: Cerambycidae: Spondylidinae)

  • Matthew A. Lemay (a1), Peter J. Silk (a1) and Jon Sweeney (a1)

Abstract

We describe the calling posture of the brown spruce longhorn beetle, Tetropium fuscum (F.), and demonstrate, using solid-phase micro-extraction and gas chromatography – mass spectrometry, that this posture is positively correlated with the release of fuscumol, a male-produced long-range pheromone. The posture is observed only in males and is characterized by an extension of the legs that raises the body entirely off the substrate at an angle of approximately 10°, with the posterior end higher than the head. Characterization of the calling posture is a useful diagnostic tool for future research on the reproductive biology of T. fuscum, since a simple visual assessment can be used instead of chemical analysis to determine when males are emitting fuscumol. In addition, we demonstrate that the presence of conspecific males stimulates calling behaviour in T. fuscum. This study contributes much-needed data on the biology and mating behavior of this invasive wood-boring species.

Nous reportons la première description de la posture d'appel du longicorne brun de l'épinette, Tetropium fuscum (F.). De plus, nous démontrons, en utilisant la microextraction en phase solide, que cette posture est corrélée positivement avec le relâchement de fuscumol, la phéromone masculine de grande portée. Cette posture, observée uniquement chez les mâles, est caractérisée par l'extension verticale des membres périphériques, causant l'élévation de la partie postérieure du corps au dessus du niveau de la tête, formant ainsi, un angle de 10° avec la surface du substrat. La caractérisation de la posture d'appel fournis un outil diagnostic utile pour les recherches futures impliquant T. fuscum, offrant ainsi une confirmation visuelle qui peut être utilisée au lieu d'une analyse chimique afin d'identifier l'émission de fuscumol. De plus, nous démontrons que la présence d'autres mâles peut stimuler l'appel chez T. fuscum. Cette recherche contribue significativement à l'information requise portant sur la biologie et le comportement d'accouplement de cette espèce invasive perceuse du bois.

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Corresponding author

1 Corresponding author (e-mail: jon.sweeney@nrcan-rncan.gc.ca).

References

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Calling behavior of Tetropium fuscum (Coleoptera: Cerambycidae: Spondylidinae)

  • Matthew A. Lemay (a1), Peter J. Silk (a1) and Jon Sweeney (a1)

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