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Linklater, W.L.; MacDonald, E.A.; Flamand, J.R.B.; Czekala, N.M., 2010. Declining and low fecal corticoids are associated with distress, not acclimation to stress, during the translocation of African rhinoceros. Animal Conservation 13 (1): 104-111

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MacDonald, E.A.; Linklater, W.L.; Steinman, K.J.; Czekala, N.M., 2008. Rapid colour-change pregnancy test for rhinoceros using faeces. Endangered Species Research 4: 277-281, figs. 1-2, tab. 1

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Czekala, N.M., 2002. San Diego Center for Reproduction of Endangered Species (CRES), California, USA. International Zoo News 49 (1): 53-54

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Swaisgood, R.R.; Czekala, N.M.; Patton, M.L., 2002. Reproductive failure in southern white rhinoceros: testing hypotheses with behavioral and hormonal data from captivity and the field: pp. 74-75

 In: Aubery, L. et al. Proceedings of the [second] Rhino Keepers' Workshop 2001, Zoological Society of San Diego May 7-10, 2001. San Diego, Zoological Society


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Radcliffe, R.W.; Eyres, A.I.; Patton, M.L.; Czekala, N.M.; Emslie, R.H., 2001. Ultrasonographic characterization of ovarian events and fetal gestational parameters in two southern black rhinoceros (Diceros bicornis minor) and correlation to fecal progesterone. Theriogenology 55: 1033-1049, figs. 1-6

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Patton, M.L.; Swaisgood, R.R.; Czekala, N.M.; White, A.M.; Fetter, G.A.; Montagne, J.P.; Rieches, R.G.; Lance, V.A., 1999. Reproductive cycle length and pregnancy in the southern white rhinoceros (Ceratotherium simum simum) as determined by fecal pregnane analysis and observations of mating behavior. Zoo Biology 18 (2): 111-127, figs. 1-4, tables 1-2

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Radcliffe, R.W.; Czekala, N.M.; Osofsky, S.A., 1997. Combined serial ultrasonography and fecal progestin analysis for reproductive evaluation of the female white rhinoceros (Caratotherium simum simum): preliminary results. Zoo Biology 16 (5): 445-456, figs. 1-5

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Czekala, N.M.; Callison, L., 1996. Pregnancy diagnosis in the black rhinoceros ( Diceros bicornis) by salivary hormone analysis. Zoo Biology 15 (1): 33-44, figs. 1-4

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