CAJ | 학술논문

黑头噪鸦(Perisoreus internigrans)是我国青藏高原高山针叶林的特有鸟类,种群数量稀少,一些基本生活史资料至今依然缺乏.我们于2001-2004年间对该物种在卓尼和九寨沟地区的种群状况和栖息地选择进行了研究.研究表明黑头噪鸦通常以平均3.8只个体构成的“群体”形式活动,平均家域大小为42.0 ha,平均巢间距为2.7km.在研究区域,种群密度大小仅0.6只/km2,大概只有10％栖息地被利用.我们发现,该鸟对成熟针叶林有着强烈的偏好,不喜好在灌丛活动,而对针叶林幼林、草地和人类居住地没有表现出特别的喜好.
흑두조아(Perisoreus internigrans)시아국청장고원고산침협림적특유조류,충군수량희소,일사기본생활사자료지금의연결핍.아문우2001-2004년간대해물충재탁니화구채구지구적충군상황화서식지선택진행료연구.연구표명흑두조아통상이평균3.8지개체구성적“군체”형식활동,평균가역대소위42.0 ha,평균소간거위2.7km.재연구구역,충군밀도대소부0.6지/km2,대개지유10％서식지피이용.아문발현,해조대성숙침협림유착강렬적편호,불희호재관총활동,이대침협림유림、초지화인류거주지몰유표현출특별적희호.
We assessed habitat preference and population status of the Sichuan Jay (Perisoreus internigrans),a poorly known Chinese endemic bird,at two sites (Zhuoni and Jiuzhaigou) in the Qinghai-Tibetan plateau between 2001 and 2004.Mean group size was 3.8 jays.Each group occupied a mean home range of 42.0 ha during the breeding season,and the mean internest distance was 2.7 km.These data indicated that the jays used less than ten percent of the available habitats and occurred at an overall density of only 0.6 jays per km2.Radio-tracked Sichuan Jays had a strong preference for mature montane coniferous forests and avoided areas dominated by shrubs,while the utilization of young conifers,grassland,and human residential habitat types did not differ significantly from the values expected from the home-range availabilities of these habitats generally.