科研之友
微信
新浪微博
Facebook
分享链接
摘要
The Azure-rumped Tanager (Tangara cabanist) is a little studied and endangered species restricted to the Pacific slope mountains of Guatemala and Chiapas, Mexico. We studied the nesting ecology of this species on the south-eastern slope of Atitlan volcano, dpto. Suchitepequez, Guatemala, and compiled information of other nesting sites. Thirty-two nests were recorded in Guatemala from 2001-2009, of which 30 were observed at Atitlan volcano. The altitude of nesting sites ranged from 860 to 1850 m. Fifteen nests were located in broadleaf forest with a distance to the nearest forest edge ranging from 0-700 m. Another 17 nests were in coffee plantations and orchard-like habitat with a distance from the nearest forest ranging from 5-130 m. We recorded tanagers nesting successfully in primary broadleaf forest, but also in plantations with a greatly reduced or absent upper canopy of native broadleaf trees. The 32 nests were placed in 20 different tree species. Nesting was observed in all months from April through September and was synchronized with the wet season. One nest provided data from the first day of nest-building to the fledging of juveniles. Nest-building took six days, incubation 14 days, and brooding 17 days, which is longer than the nestling period observed previously for the Azure-rumped Tanager in Chiapas and for congeners throughout the Neotropics. Using the Mayfield method for calculating nest survival from onset of incubation to the fledging of the first young, nest success was 16% (95% confidence interval: 5-45%). Our findings provide a base for practical conservation measures in the coffee-dominated landscape of the Guatemalan and Chiapan Pacific slope highlands. Accepted 31 January 2011.
- 出版日期2011
