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Ability of specially trained dogs to detect human scent which was exposed to different weather conditions over a long period
 Machová, Lucie ; Vyplelová, Petra (advisor) ; Jaroslav, Jaroslav (referee)
Survivability of human scent was observed by many scientists mainly in artificial conditions (Hudson et al., 2009; Santariová et al. 2012; Preti et al., 2006). Against this exists a few researches about survivability of human scent in nature conditions (King et al., 1964; Santariová et al., 2016). On glass tubes were taken individual humant scent from 6 volunteers. Target scents were left outdoor during 2 different periods of year. Winter samples from 3 target people were outdoor from November to May and summer samples from other 3 people from May to December. Always after 3, 4, 5 a 6 months was taken scent from 1 glass tube of each target person. After last time period was taken scent from target people on cotton textile. Scent of other volunteer was taken at the same time for purpose scent deceptions. Then was observed if dogs will be able to identify these samples corectly. Specially trained dogs on scent identification line-ups get sample from outdoor environment and they should choose the identical human scent from line of 6 samples (with 1 target and 5 deceptions). The experiment showed, that dogs are able to identify winter samples in all time periods but are not able to identify summer samples in whatever time period. Time periods do not show any diference. The biggest influence on quality change of individual human scent has intensity of sun radiation.
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