长白山花尾榛鸡繁殖成功率的研究

１９８６～１９９５年，对长白山花尾榛鸡的繁殖率进行了研究。无线电遥测的结果表明，花尾榛鸡的孵化率为６５５％（ｎ＝５），繁殖成功率为２０９％（ｎ＝４），幼鸟成活率３７５％（ｎ＝３）。花尾榛鸡家族群的幼鸟数随日龄增加而减少，幼鸟日龄为０～２５日时死亡率较高，２５日龄后的死亡率显著减少。１０年花尾榛鸡的繁殖成功率指数的变化与６月的降水量及＞１ｍｍ的降水天数呈显著的负相关（Ｐ＜００５，Ｐ＜００２５），说明育雏初期降水对幼鸟成活率的影响较大。

REPRODUCTIVE SUCCESS OF HAZEL GROUSE AT CHANGBAI MOUNTAIN

The reproductive success of Hazel grouse (Bonasa bonasia) was studied at Changbai Mountain from 1986 to 1995. Radio tracking data showed that the rate of reproductive success was 20.9% (n=4), and the survival rate of chicks at the time of brood dissolution was 37 5%(n=3). Field observations on broods during May to Augest, showed that the brood chick numbers decreased with their daily age, with the regression equation of y=9 916-0 185x+0 001x 2(P<0 0001). Analysis for the effects of weather during April to August on the reproductive success of Hazel grouse indicated that the IRS (index of reproductive success ) was correlated with the weather during early chick period. The reproductive success was significantly (P<0 005, P<0 025) negatively correlated with the precipitation and the days of precipitation in June during the young chick period, suggesting that precipitation had an adverse effect on chick survival. We found that parasitism by the tick (Ixodes persudactus) was one of the main factors causing death of the chicks.