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J Chem Ecol

Title:		Mate finding in the parasitic wasp Cephalonomia tarsalis (Ashmead): more than one way to a female's heart
Author(s):		Collatz J; Tolasch T; Steidle JL;
Address:		"Institut fur Zoologie, Fachgebiet Tierokologie 220c, Universitat Hohenheim, Garbenstr. 30, 70593, Stuttgart, Germany. collatz@gmail.com"
Journal Title:		J Chem Ecol
Year:		2009
Volume:		20090709
Issue:		7
Page Number:		761 - 768
DOI:		10.1007/s10886-009-9659-8
ISSN/ISBN:		1573-1561 (Electronic) 0098-0331 (Linking)
Abstract:		"The parasitic wasp, Cephalonomia tarsalis (Hymenoptera: Bethylidae), parasitizes larvae of the sawtoothed grain beetle, Oryzaephilus surinamensis (L.) (Coleoptera: Silvanidae), and is used for biological control of this worldwide pest of stored grain. To study the hypothesis that C. tarsalis not only mates at its natal patch but also uses olfactory cues to find mating partners elsewhere, we investigated semiochemical use by male C. tarsalis. Olfactometer experiments revealed that male C. tarsalis are arrested by odors emanating from the cocoons of conspecifics, from young unmated females, and from feces of the host. Dodecanal, which was identified from extracts of filter paper contaminated by young females, had an arresting effect on males but not on females and was, therefore, considered as a sex pheromone. These findings indicate that C. tarsalis is a species with partial local mate competition. Males mate with females: 1) at the emergence site following location of females by sex pheromones from their cocoons, and 2) after dispersal from the natal patch following location of females directly by dodecanal and indirectly by unidentified sexual kairomones from host feces"
Keywords:		"Animals Female Gas Chromatography-Mass Spectrometry Male Mating Preference, Animal/*physiology Pheromones/physiology Sex Attractants/physiology Sexual Behavior, Animal/physiology Wasps/*physiology;"
Notes:		"MedlineCollatz, Jana Tolasch, Till Steidle, Johannes L M eng Research Support, Non-U.S. Gov't 2009/07/10 J Chem Ecol. 2009 Jul; 35(7):761-8. doi: 10.1007/s10886-009-9659-8. Epub 2009 Jul 9"