Abstract: The animal sex hormones are closely related to its reproduction activity. To obtain the seasonal variation characteristics of fecal sex hormones level of the Chinese goral (Naemorhedus griseus), we analyzed 554 fecal samples collected in 2015 and 2016 by using radioimmunoassay, while 20 female and 20 male fecal samples collected in 2013 were used as comparison from the Inner Mongolia Saihanwula Nature Reserve. The results showed that testosterone had the highest level in July(236.21 ng/g +23.31 ng/g, Mean+SD). And it also showed a high level in April and had no significantly difference between April 2016 and September 2013 (P>0.05). The progesterone showed the highest level in May (398.24 ng/g+39.11 ng/g) and was significantly higher than in other months (P<0.05). The estradiol levels showed the highest in March (36.36 ng/g+3.18 ng/g) and was also significantly higher than other months (P<0.05), but it showed the lowest level in July. The seasonal variations of sex hormones confirmed the document′s record that the rut season of the Chinese goral is in October and farrowing period is in May, and also confirmed the method of using radio immunoassays to detecte fecal hormones concentration levels of Chinese goral for analysis its seasonal changes is ideal.

Key words: Chinese goral (Naemorhedus griseus), testosterone, progesterone, estradiol