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A SIMPLE TECHNIQUE FOR INDEXING THE MATING STATUS OF MALE SPRUCE BUDWORM, CHORISTONEURA FUMIFERANA (LEPIDOPTERA: TORTRICIDAE)

Published online by Cambridge University Press:  31 May 2012

J.C. Bergh  and
W.D. Seabrook
J.C. Bergh
Affiliation:
Department of Biology, University of New Brunswick, Fredericton, New Brunswick, Canada E3B 6E1
W.D. Seabrook
Affiliation:
Department of Biology, University of New Brunswick, Fredericton, New Brunswick, Canada E3B 6E1
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Abstract

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Section 7 of the primary simplex of the ductus ejaculatorius of unmated male spruce bud worm moths, Choristoneura fumiferana, contains a yellow substance that is not present in recently mated males. The yellow substance occurs in laboratory-colony males reared on diet and in feral males reared on foliage. It is shown that the presence/absence of this material is a reliable index of copulation during the previous 24 h. Although the yellow substance regenerates over a period of several days, males 0–72 h post-copulation may be indexed when compared with unmated males of similar age.

Résumé

La section 7 du simplex primaire du ductus ejaculatorius chez le mâle de Choristoneura fumiferana contient une substance jaune qui n’est pas présente chez le mâle qui s’est accouplé récemment. Cette substance jaune est trouvée dans les colonies de mâles élevés sur une diète dans un laboratoire ainsi que chez les mâles sauvages élevés avec le feuillage. Il est reconnu que la présence ou l’absence de ce matériel est un index fiable pour déterminer si l’accouplement a eu lieu durant les 24 h précédentes. Même si cette substance retourne après quelques jours, il est possible de comparer et d’indexer les mâles qui se sont accouplés dans les 0–72 h précédentes à des mâles vierges du même âge.

Type
Articles
Information
The Canadian Entomologist , Volume 118 , Issue 1 , January 1986 , pp. 37 - 41
Copyright
Copyright © Entomological Society of Canada 1986

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