【摘要】 对秦岭西段金鸡、白冠长尾雉、勺鸡种群密度变化进行了3年系统的研究。结果表明:金鸡、白冠长尾雉、勺鸡种群密度的年变化趋势有较稳定的规律性,从量上反映出了雉鸡季节性的集群与分群现象,并进一步分析了集群与分群的生态学意义。经过比较发现勺鸡种群密度的年变化趋势有异于金鸡与白冠长尾雉,可能是由于其繁殖期稍晚于后者之故。同时,3种雉鸡种群密度有逐年减少的趋势,其主因为人为干扰所致。在对种群密度的研究中,计算出了3种雉鸡的最适密度,这对指导这3种雉鸡的保护与管理工作积累了基础资料。更多还原

【Abstract】 We have spent three years studying the variations of the population density of Golden pheasants, Reeves’s pheasants and koklass pheasants. Our study shows the yearly changes of the three species’ population densities follow a relatively stable rule. Our study also presents a quantitative report of the pheasants’ seasonal aggregation and scattering and an analysis of the ecological meaning of the birds’ seasonal aggregation and scattering. Through comparison, we have found that the yearly change tendency of population density of the koklass pheasant is different from that of the golden pheasant and Roeves’s pheasant. The different may result from the fact that the reproduction period of the former species is later than that of the latter two species. We have also found that the population density of all the three species is decreasing year after year. It may be due to the factor of human disturbance. We have calculated the optimal population density of these species, which may serve as the basic data for the protection these pheasants.更多还原