Grützmacher, Kim S.
Keil, Verena
Metzger, Sonja
Wittiger, Livia
Herbinger, Ilka
Calvignac-Spencer, Sebastien
Mätz-Rensing, Kerstin
Haggis, Olivia
Savary, Laurent
Köndgen, Sophie
Leendertz, Fabian H.
Funding for this research was provided by:
Hans Böckler Stiftung
ARCUS Great Ape Fund
European Association of Zoo and Aquaria
Article History
Received: 3 October 2017
Revised: 9 January 2018
Accepted: 31 January 2018
First Online: 27 February 2018
Free to read: This content has been made available to all.