The breeding biology of the endemic Berthelot's Pipit Anthus berthelotii in a harsh oceanic island environment (Tenerife, Canary Islands)
The breeding biology of the endemic Berthelot's Pipit Anthus berthelotii in a harsh oceanic island environment (Tenerife, Canary Islands)
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DOI：
10.2989/ostrich.2007.78.3.5.316
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发表时间：
2007-10-01
期刊：
影响因子：
1
通讯作者：
Cresswell, Will
中科院分区：
文献类型：
--
作者：
Garcia-del-Rey, Eduardo;Cresswell, Will
我们描述的密度，繁殖和觅食生态的Berthelot的皮皮鸟（Anthus berthelotii），一种特有的雀形目，大西洋岛屿，在半干旱的特内里费岛沿海灌木丛。此外，我们分析了温度和降雨量的影响，在发病的繁殖和行为（巢址和觅食地点的选择）。在半干旱的沿海灌木丛中，平均密度（使用距离方法）为7.1只鸟10公顷（-1），草地的总密度估计为3.3只鸟10公顷（-1）。皮皮鸟繁殖早（平均平均第一次产卵日期为2月12日），并对降雨（但不是温度）作出反应。由Mayfield方法，巢存活的蛋阶段的概率为0.77和和巢存活的小鸡阶段0.67-假设孵化期为13天，小鸡阶段为12.5天-基于欧洲的平均值为类似大小的草地琵琶。总体巢存活合并阶段为0.51。皮皮鸟的窝卵数很低（3.3个卵，范围为2-4个）。暴雨对巢的破坏是巢失败的主要原因（五分之三的失败）。在密度相对较低的狼毒大戟灌木丛中筑巢。鸟类选择草地作为主要觅食地点，但在筑巢期间也喜欢在大岩石上觅食：毛虫是主要食物（17个猎物中有14个捕获）。
We describe the density, breeding and foraging ecology of the Berthelot's Pipit (Anthus berthelotii), an endemic passerine to the Atlantic islands, in the semi-arid coastal scrub of Tenerife. Furthermore, we analyse the effects of temperature and rainfall in the onset of reproduction and the behaviour (nest site and foraging site selection). The average density of the Pipit (using DISTANCE methodology) in the semi-arid coastal scrub was 7.1 birds 10ha(-1), and the overall density estimate in grassland was 3.3 birds 10ha(-1). The Pipit bred early (mean average first-egg laying date 12 February) and in response to rainfall (but not temperature). By the Mayfield method, the probability of the nests surviving the egg stage was 0.77 and of and the nests surviving the chick stage 0.67-assuming an incubation period of 13 days and a chick stage of 12.5 days-based on the European average for the similar-sized Meadow Pipit Anthus pratensis. Overall nest survival pooling stages were 0.51. The Pipits had a low clutch size (3.3 eggs, range of 2-4). Nest damage by heavy rainstorms was the major cause of nest failures (three out of five failures). The Pipits nested preferentially in grass with relatively low densities of Euphorbia balsamifera bushes. Birds selected grassy areas as their main foraging site but also preferred to forage on large rocks during nesting: caterpillars were the main food items (14 out of 17 prey captures).