Status of and threats to the Black-winged Lovebird (Agapornis taranta) in Entoto Natural Park and Bole Sub-City, Addis Ababa, Ethiopia

W. Tekalign, A. Bekele
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引用次数: 2

Abstract

A study of the population status of and threats to the Black-winged Lovebird (Agapornis taran- ta) was carried out from September 2008 to February 2009 in Entoto Natural Park (ENP) and in Bole Sub- City, Addis Ababa, Ethiopia. A point transect count technique was employed to examine the status of the lovebirds. An average total of 58 birds was recorded of which 46 were counted in Bole Sub-City and 12 in Entoto Natural Park areas. The maximum number recorded during our census was 57 in the dry season and 15 in the wet season in Bole Sub-City and Entoto Natural Park, respectively. The ratio of adult males to adult females in Entoto Natural Park was 1:0.71 and 1:0.60, and 1:0.76 and 1:0.78 in Bole Sub-City dur- ing both wet and dry seasons, respectively. The seasonal variation and difference in sex ratios between males and females was not significant ( p > 0.05) at either of the study sites. The threat for the Black- winged Lovebird or other birds in Entoto Natural Park is due to the fragmentation of natural habitats, thus decreasing food sources, owing to the domination of eucalyptus (Eucalyptus globulus) trees in the area. Grazing by livestock, intensive farming practices and deforestation by the local community have contrib- uted greatly to the degradation of the land resulting in erosion, thus devastating the habitat of the Natural Park. The vegetation cover of Entoto Natural Park and urban gardens should be managed effectively for the survival of the avian fauna of the area.
埃塞俄比亚亚的斯亚贝巴恩托托自然公园和伯乐副城市黑翼情侣鸟的现状及威胁
2008年9月至2009年2月,在埃塞俄比亚亚的斯亚贝巴的恩托托自然公园(ENP)和伯乐副城市对黑翼情侣鸟(Agapornis taran- ta)的种群现状和威胁进行了研究。采用点样条计数技术对情侣鸟的状况进行了调查。平均记录鸟类58只,其中伯乐副城区46只,恩托托自然公园12只。在伯乐副城市和恩托托自然公园,旱季和雨季记录的最大数量分别为57只和15只。在干湿季节,恩托托自然公园的成虫雌雄比例分别为1:0.71和1:0.60,伯乐副城市的成虫雌雄比例分别为1:0.76和1:0.78。在两个研究地点,男女性别比的季节变化和差异均不显著(p < 0.05)。黑翼爱情鸟或其他鸟类在恩托托自然公园的威胁是由于自然栖息地的破碎,从而减少食物来源,由于桉树(尤加利globulus)树在该地区的统治。牲畜放牧、集约化耕作和当地社区的毁林行为大大加剧了土地退化,造成水土流失,从而破坏了自然公园的栖息地。为了保护区内鸟类的生存,应对恩托托自然公园和城市园林的植被覆盖进行有效管理。
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