Bańbura Jerzy, Blondel Jacques, de Wilde-Lambrechts Hilde, Galan Marie-Jose, Maistre Marie
Centre d'Ecologie Fonctionnelle et Evolutive, CNRS, B.P. 5051, F-34033, Montpellier, France.
Oecologia. 1994 Dec;100(4):413-420. doi: 10.1007/BF00317863.
Mediterranean evergreen forests of Corsica are characterized by relatively high species diversity of arthropods with low population densities. Food is never superabundant for Corsican blue tits Parus caeruleus. This study focused on the composition of the food of blue tit nestlings and especially on two main components, caterpillars and spiders. The nestling diet was studied for two years using 8-mm cameras that automatically took photographs of adult birds with food. The diet was composed of c. 50% caterpillars and c. 30% spiders. There were between-year and between-individual differences in these proportions. In both years of the study the proportion of caterpillars declined during the course of the breeding season. Individual and time effects on prey sizes were also observed. Pairs and individuals were fairly constant in the proportions of prey over the feeding period. Different food items were not brought in runs. These findings suggest that strong food limitation exists on Corsica, which can considerably influence life-history traits of the blue tit.
科西嘉岛的地中海常绿森林的特点是节肢动物物种多样性相对较高，但种群密度较低。对于科西嘉蓝山雀（Parus caeruleus）来说，食物从来都不是极为丰富的。本研究聚焦于蓝山雀雏鸟的食物组成，尤其是毛虫和蜘蛛这两个主要成分。通过使用8毫米的相机自动拍摄携带食物的成年鸟类，对雏鸟的饮食进行了为期两年的研究。其饮食约50%由毛虫组成，约30%由蜘蛛组成。这些比例存在年际差异和个体差异。在研究的两年中，毛虫的比例在繁殖季节过程中都有所下降。还观察到了个体和时间对猎物大小的影响。在育雏期，不同配对和个体所捕食猎物的比例相当稳定。不同的食物种类不是按顺序带回的。这些发现表明，科西嘉岛存在严重的食物限制，这可能会极大地影响蓝山雀的生活史特征。
