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The electroantennogram response: effects of varying sensillum numbers and recording electrode position in a clubbed antenna


Journal of Insect Physiology 37(2): 145-152
The electroantennogram response: effects of varying sensillum numbers and recording electrode position in a clubbed antenna
The antennal response of Oryzaephilus surinamensis (Coleoptera: Silvanidae) to a food odour (carob) was used to investigate the separate effectsof sensillum number and electrode position on the electroantennogram recorded from aclubbed antenna. By successive removal of club segments, it was shown that theelectroantennogram amplitude was proportional to the number of olfactory sensilla remaining on the antenna.Varying the recording electrode position revealed a linear gradient in theelectroantennogram over the non-club segments (2-8), where no olfactory sensilla were present, but auniform electroantennogram over the club segments (9-11) where olfactory sensilla werepresent. An electrical equivalent network is proposed for the antennawhich explains these results, and the non-uniformity of techniques classified aselectroantennograms is discussed.

Accession: 002249798

DOI: 10.1016/0022-1910(91)90100-e

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