FEEDING ECOLOGY AND LIFE-HISTORY VARIATION OF THE BLUE TIT IN MEDITERRANEAN DECIDUOUS AND SCLEROPHYLLOUS HABITATS
FEEDING ECOLOGY AND LIFE-HISTORY VARIATION OF THE BLUE TIT IN MEDITERRANEAN DECIDUOUS AND SCLEROPHYLLOUS HABITATS
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DOI：
10.1007/bf00328397
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发表时间：
1991-01-01
期刊：
影响因子：
2.7
通讯作者：
PERRET, P
中科院分区：
文献类型：
--
作者：
BLONDEL, J;DERVIEUX, A;PERRET, P
高的变化奠定日期和离合器之间的地中海混合栖息地的大陆，法国南部，和硬叶栖息地的科西嘉岛的蓝山雀的大小被假设为有关的差异，在食物供应。 利用摄影巢箱和电子计时器研究了雏鸟的食性和取食频率。 在科西嘉岛上，给雏鸟带来的食物种类要比在大陆上多得多，包括少得多的毛虫和更广泛的分类群。 然而，当表示为体积指数，猎物项目平均大于在大陆上的科西嘉。 在科西嘉岛上，摄食频率明显较低。 一个很好的相关性，发现在这两个栖息地之间的奠定日期和毛虫的高峰日期，虽然橡树的叶片发育和丰富的毛虫的峰值发生在科西嘉岛硬叶树比大陆落叶的3周后。 两种生境之间的山雀的取食生态的差异进行了讨论，在万年青的习惯，这意味着只有30%的树叶可用于食叶昆虫，而不是100%的落叶树木。 万年青树木的食物供应较晚和较低的组合是两个种群之间繁殖性状差异的最佳解释。
High variation in laying date and clutch size of the blue tit between a Mediterranean mixed habitat on the mainland, southern France, and a sclerophyllous habitat on the island of Corsica is hypothesized to be related to differences in the food supply. The diet of the nestlings and feeding frequencies were studied using camera nestboxes and electronic chronographs. Food items brought to the nestlings were much more diverse on Corsica than on the mainland, including many fewer caterpillars and a wider range of taxa. However, when expressed as a volume index, prey items were on average larger on Corsica than on the mainland. Feeding frequencies were significantly lower on Corsica. A good correlation was found in both habitats between laying date and the caterpillar peak date, although both the leafing development of oaks and the peak of abundance of caterpillars occurred 3 weeks later in the Corsican sclerophyllous trees than in the mainland deciduous ones. Differences in the feeding ecology of tits between the two habitats are discussed in the light of the evergreen habit, which means that only 30% of leaves are available for phyllophagous insects instead of 100% in deciduous trees. The combination of a late and low food supply in evergreen trees is the best explanation for the differences in breeding traits between the two populations.