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• The visitor effect in zoo-housed apes: the variable effect on behaviour of visitor number and noise

  Anita Hashmi, Matthew Sullivan

  268-282

  31-10-2020

• Zoo visitors’ perceptions of chimpanzee welfare are not affected by the provision of artificial environmental enrichment devices in a naturalistic exhibit

  Sarah L Jacobson, Lydia M Hopper, Marisa A Shender, Stephen R Ross, Maureen Leahy, Janice McNernie

  56-61

  31-01-2017