Comparative Analysis of Gonadal and Adrenal Activity in the Black and White Rhinoceros in North America by Noninvasive Endocrine Monitoring

Abstract

Patterns of fecal reproductive steroid metabolites and adrenal corticoids were characterized for 12to 24-month periods in black (n = 10 male, 16 female) and white (n = 6 male, 13 female) rhinoceroses at 14 institutions. All black rhinoceros females exhibited at least some ovarian cyclicity on the basis of fecal progestogen analysis (range, 2–12 cycles/yr… (More)

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