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Proc Biol Sci

Title:		"Dung odours signal sex, age, territorial and oestrous state in white rhinos"
Author(s):		Marneweck C; Jurgens A; Shrader AM;
Address:		"School of Life Sciences, University of KwaZulu-Natal, Pietermaritzburg, South Africa courtney.marneweck@gmail.com. Chemical Plant Ecology, Technische Universitat Darmstadt, Darmstadt, Germany. School of Life Sciences, University of KwaZulu-Natal, Pietermaritzburg, South Africa"
Journal Title:		Proc Biol Sci
Year:		2017
Volume:		284
Issue:		1846
Page Number:		-
DOI:		10.1098/rspb.2016.2376
ISSN/ISBN:		1471-2954 (Electronic) 0962-8452 (Print) 0962-8452 (Linking)
Abstract:		"Mammals commonly communicate olfactorily via urine. However, the extent to which they communicate via dung, another waste product, is unknown. Behavioural studies suggest that mammals can obtain information from dung odours but are unclear about the information transmitted. Moreover, an understanding of the volatile organic compounds (VOCs) released from dung is limited. To address this, we analysed the odours emitted from the dung of free-ranging white rhinos, and found that 2,3-dimethylundecane signalled an individual's sex, heptanal discriminated age class, nonane defined male territorial status and 2,6-dimethylundecane indicated female oestrous state. To validate these findings, we artificially reproduced key elements of the territorial and oestrous odour profiles (i.e. profiles likely to elicit behavioural responses from receivers). We then exposed free-ranging territorial males to these odours. In response, males elicited behaviours associated with the specific odours (e.g. territorial male (potential threat): reduced latency in assuming vigilance; oestrous female (potential mate): increased investigation). These results indicate that the VOCs identified from the dung of free-ranging individuals do transmit key information. Moreover, as white rhinos of all ages and sexes defecate communally, middens probably act as information centres. Furthermore, as many other mammals defecate communally, olfactory communication via dung odours is likely a widespread phenomenon"
Keywords:		"Animals Estrus/*physiology Female Male *Odorants Perissodactyla/*physiology Sexual Behavior, Animal *Territoriality Volatile Organic Compounds Ceratotherium simum middens olfactory communication volatile compounds;"
Notes:		"MedlineMarneweck, Courtney Jurgens, Andreas Shrader, Adrian M eng England 2017/01/13 Proc Biol Sci. 2017 Jan 11; 284(1846):20162376. doi: 10.1098/rspb.2016.2376"