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PLoS One

Title:		Advertisement of unreceptivity - Perfume modifications of mason bee females (Osmia bicornis and O. cornuta) and a non-existing antiaphrodisiac
Author(s):		Seidelmann K; Rolke D;
Address:		"Martin-Luther-University Halle-Wittenberg, Institute of Biology, Department Animal Physiology, Halle (Saale), Germany"
Journal Title:		PLoS One
Year:		2019
Volume:		20190506
Issue:		5
Page Number:		e0215925 -
DOI:		10.1371/journal.pone.0215925
ISSN/ISBN:		1932-6203 (Electronic) 1932-6203 (Linking)
Abstract:		"Females of many monandrous insect species announce their receptivity either by specialised sex-pheromones or by a signature mixture of cuticular hydrocarbons (CHCs). The trigger that shuts down the sex-pheromone release or initialises a change in CHC bouquet is thought to be either the mating per se or male pheromones transferred during copulation. Besides a conversion of female volatiles, the application of antiaphrodisiacs, male derived pheromones that render mated females unattractive to competitors, is another strategy to protect females from further sexual chasings. This simple pattern becomes more complicated in the monandrous mason bees Osmia bicornis (syn: O. rufa) and O. cornuta due to a post-copulation phase in their mating sequence. Males display a stereotypic behaviour right after the intromission that induces females' unreceptivity. This post-copulatory display is predestined both to trigger a transition of the CHC profile and for the application of an antiaphrodisiac. However, the postulated antiaphrodisiac was not detectable even on freshly mated females. Moreover, the male's post-copulatory display did not trigger a change in the CHC bouquet and neither did the insemination. Instead the CHC profile of freshly emerged females changes into the bouquet of nesting females simply by age as an ontogenetic process in both Osmia species. This autonomous change in the CHC profile coincides with an age-specific decrease of young female's willingness to mate. How the resulting short period of female receptivity without back coupling by storage of sperm and the lack of an antiaphrodisiac fit into the behavioural ecology of the studied mason bee species is discussed"
Keywords:		"*Animal Communication Animals Copulation/drug effects Female Hydrocarbons/metabolism/pharmacology Hymenoptera/*metabolism/physiology Male Mating Preference, Animal/drug effects Sex Attractants/*metabolism/pharmacology;"
Notes:		"MedlineSeidelmann, Karsten Rolke, Daniel eng Research Support, Non-U.S. Gov't 2019/05/07 PLoS One. 2019 May 6; 14(5):e0215925. doi: 10.1371/journal.pone.0215925. eCollection 2019"