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J Comp Physiol A Neuroethol Sens Neural Behav Physiol

Title:		Stored perfume dynamics and consequences for signal development in male orchid bees
Author(s):		Eltz T; Josten S; Mende T;
Address:		"Department of Animal Ecology, Evolution and Biodiversity, Ruhr University Bochum, 44780, Bochum, Germany. thomas.eltz@ruhr-uni-bochum.de. Department of Animal Ecology, Evolution and Biodiversity, Ruhr University Bochum, 44780, Bochum, Germany"
Journal Title:		J Comp Physiol A Neuroethol Sens Neural Behav Physiol
Year:		2019
Volume:		20190206
Issue:		3
Page Number:		311 - 320
DOI:		10.1007/s00359-019-01319-3
ISSN/ISBN:		1432-1351 (Electronic) 0340-7594 (Linking)
Abstract:		"Male orchid bees (Euglossini) collect volatiles from their environment to concoct species-specific 'perfumes', which are later emitted at mating sites. Intensity, complexity or composition of perfumes may encode age (survival) of a male, but how the individual perfume develops over time needs to be clarified. We investigated chemical changes during storage in leg pockets. We injected a mixture of eight perfume compounds into pockets of Euglossa imperialis and only the two most volatile compounds decreased over 12 days. Using a different approach we found significant shifts in quantities of naturally occurring perfume compounds of Euglossa championi over 10 days, with the strongest decreases (up to 70% peak area) in highly volatile minor compounds, e.g. monoterpenes, and noteworthy increases (up to 40%) in some sesquiterpenoids. Corresponding shifts were observed in legs of dried bees, suggesting that no metabolic activity is required for the observed changes to occur. Our results confirm that male orchid bees are generally good at preserving collected perfumes. However, subtle shifts towards heavier compounds in blends may occur over the lifetime of individual bees, e.g. due to evaporation or in-pocket chemical reaction, with old males acquiring a more pronounced base note in their seasoned perfumes"
Keywords:		"Animals *Bees *Behavior, Animal Male *Odorants *Orchidaceae Volatile Organic Compounds Chemical communication Euglossini Fragrance Pheromone analogue Scent;"
Notes:		"MedlineEltz, T Josten, S Mende, T eng Research Support, Non-U.S. Gov't Germany 2019/02/07 J Comp Physiol A Neuroethol Sens Neural Behav Physiol. 2019 Jun; 205(3):311-320. doi: 10.1007/s00359-019-01319-3. Epub 2019 Feb 6"