A retrospective review of mortality in lorises and pottos in North American zoos, 1980-2010

Patterns of mortality in captive animals can reveal potentially problematic care practices or other risk factors that may negatively impact animal health and population sustainability. We reviewed death records (necropsy and/or histopathology reports) for 367 lorises and pottos born between 1980 and 2010 that were housed in 33 North American zoos and related facilities. Our sample included 20 Loris tardigradus nordicus, 72 L. t. tardigradus, 109 Nycticebus coucang, 133 N. pygmaeus, and 33 Perodicticus potto. In all 5 groups, neonates (animals 20% of animals showed signs of disease included the cardiovascular and hemolymphatic, endocrine and metabolic, gastrointestinal, and immunologic systems. Our results indicate that reducing neonatal mortality is a major priority for sustaining these species in captivity, and common practices for managing groups during the perinatal period should be carefully scrutinized. Other areas in need of further investigation are environmental contributions to neoplastic and infectious disease, and dietary contributions to chronic degenerative conditions.