Fecal nutrients suggest diets of higher fiber levels in free-ranging than in captive proboscis monkeys (Nasalis larvatus)

Ikki Matsuda, Henry Bernard, Augustine Tuuga, Sen K.S.S. Nathan, John C.M. Sha, Ismon Osman, Rosa Sipangkui, Satoru Seino, Sanae Asano, Anna Wong, Michael Kreuzer, Diana A. Ramirez Saldivar, Marcus Clauss