Laboratorio Of Ecologia Quimica Del Comportamiento

Baruta, Venezuela

Laboratorio Of Ecologia Quimica Del Comportamiento

Baruta, Venezuela
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Sainz-Borgo C.,Laboratorio Of Ecologia Quimica Del Comportamiento | Cabrera A.,Simon Bolivar University of Venezuela | Hernandez J.V.,Laboratorio Of Ecologia Quimica Del Comportamiento
Sociobiology | Year: 2011

In order to study the nestmate recognition signal in Odontomachus bauri, behavioral tests and chemical analyses of the mandibular (MG) and postpharyngeal gland (PPG) compounds were performed. Behavioral bioassays consisted of placing two workers (a nestmate and an alien) on the foraging area in the surroundings of the 0. bauri nest; three types of treatments were applied. These were: whole bodies, body parts and gland extracts. In each treatment, the ant behavior was quantified. Chemical analyses of MG volatiles were performed using the headspace-solid phase microextraction technique and PPG hydrocarbons were analyzed by the solid sample technique. Then both were analyzed by gas chromatography-mass spectrometry. Workers recognized conspecifics and body parts from other colonies as aliens, showing that recognition signals are found over the whole body. Dummies impregnated with MG and PPG extracts were recognized as aliens, but the thorax with MG alien extract received more attacks than the thorax with the nestmate extract. Chemical analyses showed that MG volatiles have intercolonial variation. Most of the behavioral and chemical evidence show that MG volatiles are involved in the nestmate recognition system.


Sainz-Borgo C.,Laboratorio Of Ecologia Quimica Del Comportamiento | Cabrera A.,Simon Bolivar University of Venezuela | Hernandez J.V.,Laboratorio Of Ecologia Quimica Del Comportamiento
Entomotropica | Year: 2013

The objective of this work was to determine if the air pulses of odors from nest-mates and intruders, and extracts of mandibular (GM) and post-pharyngeal (GPF) glands produced electrophysiological activity on the antennas of Acromyrmex landolti and Odontomachus bauri, using the technique of electroantennography (EAG). There were no differences in the responses to pulses of odors from nest-mates and intruders between both treatments, or with respect to the control. There were differences in responses to both glands extracts between partners and intruders with respect to the control in both species. The EAG technique coupled to gas chromatography (GC) was applied to evaluated both extracts. For the GM, there were differences among the smells of companions and intruders. The results highlight the potential role of both glands in recognition of both species nest-mates. © 2013, Sociedad Venezolana de Entomología.

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