These studies assess and describe the impacts affecting various species and types of laboratory animals. Some argue that death (if humanely inflicted) does not adversely affect welfare, because a dead animal cannot experience an adverse welfare state. However, death undoubtedly constitutes a profound adverse impact for most animals, and should clearly not be excluded from harm-benefit or other ethical analyses, as sometimes occurs.
Chimpanzees. Bradshaw et al. 2008, J Traum Dissoc. [article]
Great apes. Brüne et al. 2006, Neurosci Biobehav Rev. [article]