The survival rate of Lanyu Scops Owls Otus elegans botelensis
The survival rate of Lanyu Scops Owls Otus elegans botelensis
复制标题
兰屿角鸮Otus elegans botelensis 成活率
DOI：
10.1111/j.1474-919x.2001.tb04880.x
复制
发表时间：
2001
期刊：
影响因子：
2.1
通讯作者：
P. Rothery
中科院分区：
文献类型：
--
作者：
L. Severinghaus;P. Rothery
很少有种类的猫头鹰在野外得到了很好的研究，而且只有温带地区的少数几种猫头鹰的存活率可以得到估计。本文报道了亚热带亚洲物种兰屿鸮（Lanyu Scops Owl Otus elegans botelensis）的成虫年存活率和月存活率，这是基于对一个颜色标记种群13年的研究。估计的季节性生存模式相对稳定，在5 - 6月产卵和养鸡的时间存活率较低。据估计，该物种的雌性存活率始终高于雄性存活率7%，这可能是由于繁殖成本的差异造成的。1986- 1996年的年生存率在不同年份之间没有显著差异。基于生存不变和再捕获率年变化的模型，估计所有鸟类的年平均存活率为75%，考虑到兰屿鸮的体重较小，这高于预期。结合兰屿岛的亚热带温和气候条件，讨论了这种生存和稳定的月生存模式。
Few species of owls have been well studied in the wild and estimates of survival rates are available only for a few species in the temperate region. This paper reports the adult annual and monthly survival estimates of the Lanyu Scops Owl Otus elegans botelensis, a subtropical Asian species, based on a 13-year study of a colour-marked population. The estimated seasonal survival pattern was relatively stable, with an indication of lower survival during May-June, the time of egg-laying and chick-rearing. Female survival in this species was consistently higher than male survival by an estimated 7%, which may have resulted from differential costs in reproduction. Annual survival rates during 1986-96 showed no significant differences between years. Based on a model with constant survival and annual variation in recapture rate, average annual survival for all birds was estimated as 75%, which is higher than expected given the small body weight of the Lanyu Scops Owl. This survival and the stable monthly survival pattern are discussed in light of the mild subtropical conditions of Lanyu Island.