火烧及湿地注水后扎龙丹顶鹤孵化期行为的时间分配

Time Budget of Red-crowned Crane during Incubating Season in Zhalong Nature Reserve after Burning and Irrigating

20 0 2年的 4月～ 5月份 ,于扎龙自然保护区被严重火烧后注水的大面积湿地上 ,用扫描取样法对 6对丹顶鹤 (Grusjaponensis)的孵化行为进行了观察记录 ,结果表明 :在孵化期内 ,丹顶鹤孵化行为所占的比例最高 (47.84% ) ,其次为觅食 (2 7.77% ) ,再次为警戒 (15.59% ) ,游走和静栖等其它行为所占比例较小 ;野生丹顶鹤的警戒行为 (18.84% )所占比值明显高于半散养丹顶鹤的警戒行为 (12 .3 4 % ) ,而孵化和觅食行为要低于半散养丹顶鹤 ;营巢于芦苇沼泽中的丹顶鹤 ,花费在孵化 (48.92 % )和觅食 (2 9.16% )行为上的时间要高于在苔草沼泽中营巢的丹顶鹤 (分别为 46.73 %和 2 6.63 % ) ,而花费在警戒 (13 .18% )行为上的时间却明显低于在苔草沼泽 (17.93 % )

From April to May in 2002, after a big fire and irrigating, a research on incuba ting behavior of six pairs of red-crowned crane (Grus japonensis) was conduc ted in Zhalong Nature Reserve by using scan-sampling method. The results showed that during incubating season the incubating behavior made up the highest ratio (47.84%), then was feeding (27.77%) and guarding (15.59%) in order, the ratio of locomotion and resting as well as other behaviors held less. The ratio of guard ing behavior of wild red-crowned crane (18.84%) was obvious higher than that of semi-domestic red-crowned crane (12.34%), whereas its incubating and feedin g was lower than those of the latter. Red-crowned cranes nesting in reed-marsh s pent more time in incubating (48.92%) and feeding (29.16%) than those red-crowne d crane nesting in grass-marsh (46.73% and 26.63% respectively), and less time i n guarding (13.18%) than the latter (17.93%).