四川峨眉山寄蝇的垂直分布研究(双翅目:寄蝇科)

VERTICAL DISTRIBUTION OF THE FAMILY TACHINIDAE(DIPTERA)IN MOUNT EMEI

对峨眉山寄蝇科的研究表明:寄蝇种类在数量和区系成分两个方面都表现出明显的垂直地带性.寄蝇的垂直分布与其水平分布相适应.寄蝇与其寄主昆虫在垂直分布方面也存在密切的关系.

In this paper,we list 80 species of Tachinidae flies belonging to 40 genera from Mount Emei.According to the vertical distribution of Tachinidae flies,the mountain may be divided into four vertical zones:1.low-hill zone(500-1100m),2.mid-hill zone(1100-1900m),3.high-hill zone(1900-2800m),4.hill-top zone(2800-3100).Of the total number of species of Tachinidae flies of Mt.Emei,the low-hill zone occupies 60%,the mid-hill zone56.25%,the high-hill zone 30%,the hill-top zone only 8.75%.In the low-hill zone,species of Oriental affinity occupy43.75% of the total number of Tachinidae flies recorded for this zone,while species of Palaearctic affinity occupy only10.42%.The higher the altitude of Mount Emei is,the less the species of Oriental affinity and the more the species ofPalaearctic affinity are.In the hill-top zone,the condition is exactly the reverse.The species distributed in Palaearctic realmoccupy 42.87% of the total number of Tachinidae flies in this zone,while species of Oriental realm occupy only 14.26%.There is some correlation between the vertical distribution and the horizontal distribution of Tachinidae flies,as well as somecorrelation between Tachinidae flies and their hosts in vertical and horizontal distribution.