Comparison of various reproductive status in sika deer (Cervus nippon) using fecal steroid analysis

• Published in: Journal of Veterinary Medical Science Vol. 63; no. 2; pp. 195 - 198
• Main Authors: Hamasaki, S. (Wildlife Management Office, Kawasaki, Kanagawa (Japan)), Yamauchi, K, Ohki, T, Murakami, M, Takahara, Y, Takeuchi, Y, Mori, Y
• Format: Journal Article
• Language: English
• Published: Japan JAPANESE SOCIETY OF VETERINARY SCIENCE 01.02.2001; Japan Science and Technology Agency
• Subjects: Animals; CERVUS NIPPON; Deer - physiology; fecal steroid; Feces - chemistry; Female; Male; Pregnancy; PREGNANCY DIAGNOSIS; Pregnancy Tests - veterinary; Pregnancy, Animal - metabolism; Progesterone - analysis; Radioimmunoassay; Reproduction - physiology; Seasons; Sex Determination Analysis - veterinary; SEX DIAGNOSIS; SEX HORMONES; sika deer (Cervus nippon); STEROID HORMONES; Testosterone - analysis
• ISSN: 0916-7250; 1347-7439
• DOI: 10.1292/jvms.63.195

The feasibility of fecal steroid analysis for pregnancy diagnosis and sex determination were tested in sika deer (Cervus nippon). Feces were collected from captive sika deer in June (non-breeding season and late-pregnancy period) and October (breeding season), and also from the rectum of 24 female sika deer (19 pregnant and 5 non-pregnant females) shot as part of programs for population control in February and March (mid-pregnancy period). In mid- and late-pregnancy periods, fecal progesterone concentrations were significantly higher in pregnant female than in male and non-pregnant female deer. In October, fecal testosterone concentrations were higher in adult male deer, and no difference was found between young males and females. These results suggest that fecal steroid analysis would be a useful means for estimating pregnancy status and for detecting adult male among wild deer.