Join Date: Dec 2007
Location: Ontario Canada
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Photo Submissions 119 Times in 117 Posts
Identical Twin , The Dog Knows /Nose
Ever wonder if an identical twin committed a crime and they couldn't tell which one committed it by human id only. Enter Rover .
Ludvík Pinc1, Luděk Bartoš1,2*, Alice Reslová3, Radim Kotrba2,4
1 Department of Animal Science and Ethology, Canine Behavior Research Center, Czech University of Life Sciences, Praha, Czech Republic, 2 Department of Ethology, Institute of Animal Science, Praha Uhříněves, Czech Republic, 3 Institute of Criminalistics, Praha, Czech Republic, 4 Department of Animal Science and Food Processing, Institute of Tropics and Subtropics, Czech University of Life Sciences, Praha, Czech Republic
Earlier studies have shown variation among experimental attempts to establish whether human monozygotic twins that are genetically identical also have identical individual scents. In none of the cases were the dogs able to distinguish all the individual scents of monozygotic twins living in the same environment if the scents were presented to them separately. Ten specially trained police German Shepherd dogs of three Czech Republic Police Regional Headquarters were used for scent identification in our study. The dogs were supposed to match scents of two monozygotic pairs (5 and 7 years old) and two dizygotic twin pairs (8 and 13 years old). Scents were collected on cotton squares stored in glass jars. Dog handlers were blind to the experiment details. In each trial (line-up), one scent was used as a starting scent and the dog was then sent to determine if any of the 7 presented glass jars contained a matching scent. Scents of children of similar ages were used as distractors. In the matching procedure, the dogs matched correctly the scent of one twin with the other, as well as two scents collected from every single identical and non-identical twin to prove their efficacy and likewise, the presence of the matching twin scent in any given glass jar. All dogs in all trials distinguished correctly the scents of identical as well as non-identical twins. All dogs similarly matched positively two scents collected from the same individuals. Our findings indicated that specially trained German Shepherd dogs are able to distinguish individual scents of identical twins despite the fact that they live in the same environment, eat the same food and even if the scents are not presented to them simultaneously.
Dave and Molly
Ian Dunbar was awarded the Outstanding Achievement Award from I.P.D.T.A. Here's a picture of me accepting the award on his behalf.
Member of IAABC ,International Association of Animal Behavior Consultants , Member of Pet Professional Guild