摘要
关于鸟类种群生态的比较研究较少。我们对长白山北坡的两种鹀类作了比较研究,包括居留情况、种群密度、繁殖力、新生雏和离巢幼鸟与成鸟量度比较,巢位、育雏及食物的选择。黄胸鹀和赤胸鹀平均每巢在留巢期喂育昆虫2343只,近321g,其中绝大多数是害虫,两种鸟和森林关系比较密切。
From April to September in 1980, May to June in 1984 and August in 1988, the population ecology and interspecific relations of two bird species were investigated in Chang Bai Mountain, The population densities of Emberizafucata fucata and Emberiza aureola ornata respectively are 3.7±0.05/ha and 4.4±0.04/ha.Their fecundities respectively are 2.00 and 2,02. 30 nestlings of E. f.fucata and 42 nestlings of E. a. ornata were measured in breeding season. The weigth growth curves of these two brid nestlings fit the Logistic Equation well. Observations were made on the ratio of length body、wing、tarsus, bill and tail, between nestlings、 young birds and adult birds. The food taken by nestlings entirly consist of forest pests, 95% for E. a. ornata and 81.7% for E. f. fucata.
