Kun Shan University Institutional Repository:Item 987654321/3373
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    作者: 翁義聰
    日期: 2007
    上传时间: 2009-08-14 23:16:06 (UTC+8)
    摘要: The global population of the Black-faced Spoonbill (Platalea minor) has increased steadily.We estimated global population growth rates of the Black-faced Spoonbill based on annual counts of wintering populations in East Asia between 1991/1992 and 2003/2004. The mean (+-SD) annual growth rate was 1.13+-0.08. The estimated survival rate was 86.6+-9.3% based on the annual return rates of color-banded birds in Taiwan between 1998 and 2005. We predicted global Black-faced Spoonbill populations in 2003/2004–2013/2014 using a stochastic exponential model and showed the mean global population in 2013/2014 would exceed 4,000+-950. The probability of a global population decline to less than the 2003/2004 level is low (P= 0.06).If the 1991–2004 growth rate is sustained, the probability for the global population to increase to twice that of the 2003/2004 level is 0.98 and the predicted mean wintering population in Taiwan could exceed 2,000 in 2013/2014. Establishment of new protective areas and increasing food availability at existing reserves and adjacent fish ponds in southwestern Taiwan will be necessary to ensure continued growth.
    關聯: The Wilson Journal of Ornithology 119(2), pp.246–252
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