Volodin, Ilya A.
Yurlova, Daria D.
Ilchenko, Olga G.
Volodina, Elena V.
Article History
Received: 2 April 2021
Accepted: 2 September 2021
First Online: 10 September 2021
Declarations
:
: This study was part of the research program of the Scientific Research Department of Moscow Zoo. One author belongs to zoo staff, so no special permission was required for the work with animals in Moscow Zoo. All study animals belonged to the laboratory collection of Moscow Zoo. The experimental procedure has been approved by the Committee of Bio-ethics of Lomonosov Moscow State University, research protocol # 2011–36. We adhered to the ‘Guidelines for the treatment of animals in behavioural research and teaching’ [CitationRef removed] and to the laws on animal welfare for scientific research of the Russian Federation, where the study was conducted. For handling of animals during measurements, we adhered to the guidelines ‘Hand restraint of wildlife’ [CitationRef removed].
: Not applicable.
: All authors declare no conflict of interests.