Abstract: [Objective] To study the effects of castration on lipid metabolism in male Chinese rural dogs. [Method] A total of twelve Chinese rural dogs of similar age and weight were divided into non-surgical group and castration group. The castration surgery was performed on the castration group dogs. The contents of triglyceride （TG）, total cholesterol （TC）, low density lipoprotein （LDL）, and high density lipoprotein （HDL） in serum were measured on the day before the surgery and the 14^th and 21^st days after the surgery. The effects of castration on lipid metabolism in male dogs were studied using the non-surgical group as control. [Result] Compare with the non-surgical group, the content of serum TG in the castration group increased significantly from day 14 to day 21 while the content of TC decreased when. The content of HDL on the 14^th and 21^st days was lower than the non-surgical group while LDL was higher and showed an upward trend overall. [Conclusion] The lipid metabolism of male Chinese rural dogs are affected by castration, resulting in the increase in triglyceride, the decrease in total cholesterol and high density lipoprotein, and the increase in low density lipoprotein.

Key words: castration, triglyceride, total cholesterol, low density lipoprotein, high density lipoprotein, Chinese rural dogs