Endocrine profile of captive Callithrix penicillta individuals (Black tufted-ear marmosets) before and after environmental enrichment - Sgai, Manuela Gonçalves Fraga Geronymo; Zeildler, E. V; Rocha, C. G; Portella, T. P; Cottini, Ana Paola; Pizzutto, Cristiane Schilbach; Viau, Paul; Guimarães, Marcelo Alcindo de Barros Vaz (International Conference on Environmental Enrichment, 2007)