Behavioral characteristics of an extremely old rhesus macaque in a zoo: Dementia-like symptoms and implications for quality of life of geriatric animals
Yumi Yamanashi, Haruna Bando, Keita Niimi, Daisuke Nakagawa, Susumu Iwaide, Tomoaki Murakami
This study documents behavioral changes in an old rhesus macaque, suggesting possible signs of cognitive decline and physical deterioration, but without confirmed cognitive dysfunction.
Zoo Biology · May 4, 2026Peer-reviewedZoology