Ziegler, T. E., Bridson, W. E., Snowdon, C. T. et al. 1987. Urinary gonadotropin and estrogen excretion during the postpartum estrus, conception, and pregnancy in the cotton-top tamarin (Saguinus oedipus oedipus). American Journal of Primatology 12, 127-140.
The results indicated that enrichment is more determinant than cage size, as more voles developed stereotypies in SB and BB than in SR and BR.
Year
1987