2种调查方法对四川黑竹沟国家级自然保护区3种雉类种群密度调查的比较

种群数量是物种的重要生态学基础资料,合适的密度调查方法是数量估算的基础。2016年4-5月,采用广泛应用于鸡形目Galliformes鸟类种群密度调查的样线法和样点法,调查了四川黑竹沟国家级自然保护区3种鸡形目鸟类(白腹锦鸡Chrysolophus amherstiae、红腹角雉Tragopan temminckii和血雉Ithaginis cruentus)的种群密度。样线法和样点法估算的雄体密度分别是:白腹锦鸡1.20只/km^2和(6.31±0.98)只/km^2,红腹角雉5.41只/km^2和(0.39±0.17)只/km^2,血雉3.01只/km^2和(5.97±2.70)只/km^2。除红腹角雉外,样点法估算的白腹锦鸡、血雉种群密度均大于样线法。建议针对不同鸡形目鸟类采用不同的调查方法,并尽量扩大样本数量,从而提高调查结果的准确性。

A Survey on the Population Densities of Three Galliformes Species by Using Two Different Methods in the Heizhugou National Nature Reserve,Sichuan

Population size is an important basic ecological character of species, and thus applying appropriate density survey method is fundamental to estimate the quantity. In this study, 2 commonly used methods(line transect and point count) were used to estimate the population densities of 3 Galliformes species of calling males(Chrysolophus amherstiae, Tragopan temminckii, and Ithaginis cruentus) in the Heizhugou National Nature Reserve(Sichuan province) between April and May in 2016. The results of line transect method and point count method showed that the population densities of the 3 species were 1.20 individuals/km^2 and(6.31±0.98) individuals/km^2, 5.41 individuals/km^2 and(0.39±0.17) individuals/km^2, and 3.01 individuals/km2 and(5.97±2.70) individuals/km^2, respectively. This result suggested that except for T. temminckii, the densities of the other 2 species estimated by using point count method are better than by using line transect method. Therefore, it is recommended that different methods should be used for estimating the population densities of different pheasants, and large sample size can improve the accuracy of predictive results.